CN112649293A - Testing arrangement of geotechnical membrane hydraulic characteristic decay under big deformation state - Google Patents
Testing arrangement of geotechnical membrane hydraulic characteristic decay under big deformation state Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 106
- 239000012528 membrane Substances 0.000 title claims description 25
- 238000009864 tensile test Methods 0.000 claims abstract description 12
- 230000002706 hydrostatic effect Effects 0.000 claims description 26
- 238000005070 sampling Methods 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 16
- 230000008595 infiltration Effects 0.000 claims description 4
- 238000001764 infiltration Methods 0.000 claims description 4
- 238000004904 shortening Methods 0.000 abstract 1
- 230000035699 permeability Effects 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920006302 stretch film Polymers 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/086—Investigating permeability, pore-volume, or surface area of porous materials of films, membranes or pellicules
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
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Abstract
本发明公开了一种大变形状态下土工膜水力特性衰变的测试装置，包括总控制计算器、无纸记录仪和土工膜，还包括拉伸试验模块和水力试验模块，所述拉伸试验模块包括万能试验机和拉伸膜架，所述拉伸模架安装在万能试验机的工作台上，所述拉伸膜架包括固定架、导向滑板、上连接杆、夹具组和拉力传感器；本发明结构独特，操作方便，有效的解决了现有装置不能真实模拟并测量实际工程中土工膜处于大变形状态下水力特性的问题，还解决了在对土工膜进行固定变形量拉力特性测试时，需要长时间使用万能试验机，导致万能试验机寿命缩短的问题。
The invention discloses a test device for the decay of hydraulic properties of a geomembrane under a large deformation state, comprising a total control calculator, a paperless recorder and a geomembrane, as well as a tensile test module and a hydraulic test module. The tensile test module It includes a universal testing machine and a tensile film frame, the tensile mold frame is installed on the workbench of the universal testing machine, and the tensile film frame includes a fixed frame, a guide slide, an upper connecting rod, a clamp group and a tension sensor; this The invention has a unique structure and convenient operation, effectively solves the problem that the existing device cannot truly simulate and measure the hydraulic properties of the geomembrane in a state of large deformation in actual engineering, and also solves the problem that when the geomembrane is tested for the tensile properties of a fixed deformation amount, The universal testing machine needs to be used for a long time, which leads to the problem of shortening the life of the universal testing machine.
Description
Technical Field
The invention belongs to the technical field of seepage-proofing geomembrane deformation state testing devices in hydraulic engineering, and particularly relates to a testing device for hydraulic property decay of a geomembrane in a large deformation state.
Background
The impermeable geomembrane has the characteristics of good tensile strength, permeability resistance, acid and alkali resistance, heat resistance, strong adaptive deformability, low engineering cost and the like, and is widely applied to impermeable engineering of dams, reservoirs, riverways, banks, refuse landfills and the like.
The impermeable geomembrane is used as a main impermeable material of an upstream dam face of an earth-rock dam or a rock-fill dam, the difference deformation of a dam body and a dam abutment at the peripheral seam is large, the settlement deformation of the dam body is generally larger than the deformation of an anchoring end of the dam abutment, and the impermeable geomembrane at the peripheral seam generates large stretching deformation due to the difference displacement deformation. In a large deformation state, the hydraulic characteristics of the geomembrane may be attenuated, particularly in the engineering operation period, the anti-seepage geomembrane at the peripheral seams is in the large deformation state for a long time, and the hydraulic characteristics of the anti-seepage geomembrane relate to the safety of the whole dam body anti-seepage system.
The prior art in China usually adopts universal tester to simulate tensile to the geomembrane, when using universal tester to simulate tensile to the geomembrane, when testing the characteristic that the mechanical properties decay with time of geomembrane under the fixed deflection condition, the geomembrane needs clamping always in universal tester according to experimental requirement to keep fixed tensile deflection, thereby lead to universal tester's live time to increase, cause universal tester's loss aggravation, make universal tester's life-span shorten.
In the prior art in China, a geosynthetic material hydrostatic pressure resistance tester is usually adopted to test the hydraulic property of the geomembrane, but the test condition for testing the hydraulic property of the geomembrane in a large deformation state is not provided, the hydraulic property of the geomembrane in the large deformation state in the actual engineering can not be truly simulated and measured, and a testing device for testing the hydraulic property of the geomembrane in the large deformation state is necessary to be developed for truly and effectively reflecting the hydraulic property of the geomembrane in the state.
Disclosure of Invention
The device is unique in structure and convenient to operate, effectively solves the problem that the existing device cannot truly simulate and measure the hydraulic property of the geomembrane in the large deformation state in actual engineering, and also solves the problem that the service life of a universal testing machine is shortened due to the fact that the universal testing machine needs to be used for a long time when the geomembrane is subjected to fixed deformation tensile property testing.
The technical scheme adopted by the invention for solving the technical problems is as follows: a testing device for hydraulic property decay of an geomembrane in a large deformation state comprises a master control calculator, a paperless recorder, the geomembrane, a tensile test module and a hydraulic test module, wherein the tensile test module comprises a universal testing machine and a tensile membrane frame, the tensile membrane frame is installed on a workbench of the universal testing machine, the tensile membrane frame comprises a fixed frame, a guide sliding plate, an upper connecting rod, a clamp group and a tension sensor, the fixed frame comprises an upper fixed plate and a lower fixed plate which are vertically arranged in parallel at intervals, the upper fixed plate and the lower fixed plate are fixedly connected together through a plurality of vertical columns, and the lower fixed plate is fixedly connected with the workbench; the guide sliding plates are arranged between the upper fixing plate and the lower fixing plate in parallel, and sliding holes are formed in the positions, corresponding to the vertical columns, of the periphery of each guide sliding plate and are sleeved on the corresponding vertical columns in a matched mode; the middle part of the upper fixing plate is provided with a shaft hole, a limiting assembly is arranged at the hole opening of the shaft hole, the upper connecting rod is sleeved in the shaft hole in a matching manner, one end of the upper connecting rod extends into the fixing frame to be vertically connected with the guide sliding plate, the other end of the upper connecting rod penetrates through the limiting assembly outwards to extend out of the fixing frame to be connected with an upper movable cross beam of the universal testing machine, and the limiting assembly is used for fixing the axial position of the upper connecting rod; the clamp group is arranged in the fixing frame and comprises an upper clamp and a lower clamp which are respectively clamped and fixed at the upper end and the lower end of the geomembrane, the upper clamp is fixed with the guide sliding plate through a tension sensor, the tension sensor is connected with the master control calculator through a paperless recorder, and the lower clamp is fixed on the lower fixing plate; the hydraulic test module includes resistant hydrostatic test appearance and installs the tensile membrane sampling device in resistant hydrostatic test appearance, tensile membrane sampling device includes upper fixed disk and lower connection pad, upper fixed disk and lower connection pad are together fixed with the axle center, and between upper fixed disk and the lower connection pad the sealed inherent tensile state geomembrane that presss from both sides, open at the middle part of lower connection pad has the water logging mouth that runs through the upper connection pad, surveys the mouth of a river and the outlet sealing connection of resistant hydrostatic test appearance test end, a plurality of infiltration holes have been seted up with lower connection pad water logging mouth corresponding position department to the upper fixed disk.
The universal testing machine is connected with the master control calculator through the paperless recorder; and the electronic balance for the hydrostatic pressure test is connected with a master control calculator.
The utility model discloses a fixing device, including mount, regulation seat, bottom of fixed frame, fixed screw, bottom of the mount are fixed with a plurality of regulation seats at the interval all around, it includes clamping screw and supporting seat to adjust the seat, clamping screw is together fixed with the bottom plate perpendicularly, the middle part of supporting seat is opened along vertical has the screw to match the suit on corresponding clamping screw.
The bottom surface of mount bottom plate is equipped with lower connecting rod, and lower connecting rod sets up with the axle center with the upper junction pole, the other end and the workstation fixed connection of lower connecting rod.
The upper section of the vertical column is provided with internal threads, and the vertical column thread sections on the upper side and the lower side of the guide sliding plate are respectively sleeved with a limiting nut.
The limiting assembly comprises a limiting ring table and a limiting bolt, the limiting ring table is fixed on an upper fixing plate at the upper orifice of the shaft hole, and the tail end of the upper connecting rod penetrates through the limiting ring table outwards and extends out of the fixing frame to be detachably connected with an upper movable cross beam of the universal testing machine; and one side of the limiting ring platform is provided with bolt holes communicated with the inside along the radial direction, and is provided with limiting bolts in a matching way.
The circumference side of upper fixed disk and lower connection pad all corresponds the interval and is equipped with four along radial convex connection platforms, and the middle part of connecting the platform is opened along the axial has the bolt hole.
And a scale is arranged on the lower fixing plate on one side of the lower clamp and is vertically fixed on the lower fixing plate along the vertical direction.
The invention has the beneficial effects that: the device for testing the hydraulic property decay of the geomembrane in the large deformation state, which is provided by the invention, has a unique structure, comprises a master control calculator, a paperless recorder and the geomembrane, and also comprises a tensile test module and a hydraulic test module;
the tensile test module is used for performing tensile property test on the geomembrane, the tensile test module comprises a universal testing machine and a tensile membrane frame, the universal testing machine is connected with a master control calculator through a paperless recorder, the tensile membrane frame is arranged on a workbench of the universal testing machine, a clamp group is arranged in the tensile membrane frame and used for clamping the geomembrane to be tested, an upper clamp of the clamp group penetrates through the tensile membrane frame through an upper connecting rod to be connected with an upper movable cross beam of the universal testing machine, when the upper movable cross beam of the universal testing machine moves upwards, the upper clamp is driven to move upwards through the upper connecting rod to stretch the geomembrane, and when the geomembrane is stretched, the master control calculator can measure and record the tensile state property of the geomembrane;
and not only a tension sensor is arranged between the upper connecting rod and the upper clamp, but also a limit component for fixing the axial position of the upper connecting rod is arranged on the tensile membrane frame, the tension sensor is connected with a master control calculator through a paperless recorder, when the mechanical property attenuation characteristic test is carried out on the deformation of the geomembrane needing to be fixed along with the time, the axial position of the upper connecting rod can be fixed through the limit component, so that the tensile force of the geomembrane can be fixed, the geomembrane is kept in a large deformation state, the master controller can measure the attenuation characteristic of the geomembrane in the large deformation state through the tension sensor and record the attenuation characteristic, and after the axial position of the upper connecting rod is fixed through the limit component, the tensile membrane frame can be taken down from the universal testing machine, so that the service time of the universal testing machine is shortened, and the working abrasion of, the service life of the universal testing machine is prolonged.
The hydraulic test module comprises a hydrostatic pressure resistance tester and a tensile film sampling device arranged in the hydrostatic pressure resistance tester, the tensile film sampling device comprises an upper fixing disc and a lower connecting disc, the middle part of the lower connecting disc is provided with a water measuring port penetrating through the upper connecting disc, the water measuring port is connected with a water outlet at the testing end of the hydrostatic pressure resistance tester, the upper fixing disc and the lower connecting disc are provided with a plurality of water seepage holes at the corresponding positions of the water measuring ports, the upper fixing disc and the lower connecting disc are fixed together with the same axis, and an inherent tensile geomembrane is sealed and clamped between the upper fixing disc and the lower connecting disc, the upper fixing disc and the lower connecting disc clamp the earth working mould to keep the earth working mould in a stretching state, therefore, when a hydrostatic pressure resistance tester is used for hydraulic characteristic test, the hydraulic characteristic of the geomembrane in a large deformation state in actual engineering can be truly simulated and measured, and the test data is more realistic.
The invention provides a testing device for the hydraulic property decay of an geomembrane in a large deformation state, which has a unique structure and is convenient to operate, and effectively solves the problem that the existing device cannot truly simulate and measure the hydraulic property of the geomembrane in the large deformation state in actual engineering, and also solves the problem that the service life of a universal testing machine is shortened because the universal testing machine needs to be used for a long time when the fixed deformation tensile property of the geomembrane is tested.
Drawings
FIG. 1 is a schematic of the present invention.
FIG. 2 is a schematic view of the structure of a stretch film frame of the present invention.
FIG. 3 is a schematic view of the fixed relationship between the upper connecting rod and the upper movable cross beam of the present invention.
Fig. 4 is an enlarged schematic view of the structure at a in fig. 2.
FIG. 5 is a schematic view of the structure of the stretched film sampling device of the present invention.
Fig. 6 is a schematic structural view of the upper fixing disc of the invention.
FIG. 7 is a schematic diagram of the lower connecting disc structure of the present invention.
Fig. 8 is a schematic view of the position fixing of the guide sliding plate of the invention.
Fig. 9 is a schematic view of the structure of the adjusting seat of the present invention.
FIG. 10 is a schematic view of the installation position of the sampling assistance device of the present invention.
FIG. 11 is a schematic view of the sampling assistance device of the present invention.
FIG. 12 is a schematic view of a fork-shaped hanger of the auxiliary sampling device of the present invention.
Reference numbers in the figures: 1 is a universal tester, 11 is an upper movable beam, 111 is a fixed seat, 12 is a scale, 2 is a tensile membrane frame, 21 is a fixed frame, 211 is an upper fixed plate, 2111 is a limit component, 2112 is a limit ring platform, 2113 is a limit bolt, 212 is a lower fixed plate, 213 is a vertical column, 22 is an upper connecting rod, 23 is a clamp group, 231 is an upper clamp, 232 is a lower clamp, 24 is a tension sensor, 25 is a guide sliding plate, 26 is a limit nut, 3 is an adjusting seat, 31 is a fixed screw, 32 is a supporting seat, 33 is a lower connecting rod, 4 is a sampling auxiliary device, 41 is a connecting disc bracket, 42 is a fixed plate bracket, 43 is a supporting plate, 44 is a fork-shaped hanger, 441 is a connecting plate, 442 is a hanging tooth, 4421 is a front hanging plate, 4422 is a rear supporting plate, 45 is a telescopic rod, 451 is a rod body, 452 is a sliding sleeve, 5 is a hydrostatic pressure tester, 6 is a tensile membrane sampling device, 61 is, 621 is the infiltration hole, 62 is the lower connection pad, 621 is the water testing mouth, 622 is the seal groove, 63 is the joint table, 64 is the seal line, 7 is total control calculator, 8 is the paperless record appearance, 9 is the geomembrane.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Example 1
Example 3
The embodiment provides another testing device for the decay of the hydraulic property of the geomembrane in a large deformation state, which comprises a master control calculator, a paperless recorder and the geomembrane, wherein the paperless recorder is connected with the master control calculator and is used for recording the result calculated by the master control calculator, the testing device further comprises a tensile testing module and a hydraulic testing module, the tensile testing module comprises a universal testing machine 1 and a tensile membrane frame 2, the tensile membrane frame 2 is arranged on a workbench of the universal testing machine 1, the universal testing machine 1 is connected with the master control calculator through the paperless recorder, the tensile membrane frame 2 comprises a fixed frame 21, a guide sliding plate, an upper connecting rod 22, a clamp group 23 and a tension sensor 24,
as shown in fig. 2, the fixing frame 21 includes an upper fixing plate 211 and a lower fixing plate 212 which are vertically arranged in parallel and spaced, and the upper fixing plate 211 and the lower fixing plate 212 are fixedly connected together by four vertical posts 213, specifically: the upper fixing plate 211 and the lower fixing plate 212 are rectangular steel plates with the same size, and corresponding vertex angles of the upper fixing plate 211 and the lower fixing plate 212 are welded and fixed together through a vertical column 213, so that a cuboid frame-shaped fixing frame 21 is formed; the guide sliding plate 25 is arranged between the upper fixing plate 211 and the lower fixing plate 212 in parallel, sliding holes are formed in the positions, corresponding to the vertical columns 213, of the periphery of the guide sliding plate 25, the guide sliding plate is sleeved on the corresponding vertical columns 213 in a matching mode, and the guide sliding plate 25 enables the whole structure of the fixing frame to be firmer.
The lower fixing plate 212 of the fixing frame 21 is fixed to the workbench of the universal testing machine 1 in various ways, for example: the lower fixing plate 212 is fixed with the fixing table of the universal testing machine 1 through bolts, and the lower fixing plate can be separated from the working table of the universal testing machine 1 after the bolts are detached; open at the upper fixed plate 211 middle part has the shaft hole, and the orifice department in shaft hole is equipped with spacing subassembly 2111, goes up connecting rod 22 and matches the suit in the shaft hole to can follow the shaft hole and slide from top to bottom, the one end of going up connecting rod 22 extends into the mount and is connected with direction slide 25 is perpendicular, and the other end outwards passes spacing subassembly and stretches out the mount and be connected with universal tester's last movable cross beam, specifically:
as shown in fig. 3, the tail end of the upper connecting rod 22 is provided with a pin shaft along the radial direction, the movable cross beam and the upper connecting rod on the universal testing machine 1 are fixed with a fixed seat 111 at the same axial position, the middle part of the fixed seat 111 is provided with a fixed hole matched with the upper connecting rod, the fixed seat 111 is provided with a pin shaft hole communicated with the fixed hole of the fixed seat 111 along the radial direction, the tail end of the upper connecting rod 22 is inserted into the fixed hole in a matching manner, the fixed seat 111 is overlapped with the small shaft hole at the tail end of the upper connecting rod 22 and is fixed together by the pin shaft, when the upper movable cross beam 11 of the universal testing machine 1 moves up and down, the guide sliding plate 25 is driven by the upper connecting rod to slide up and down along the vertical column 213, and when.
As shown in fig. 4, the limiting assembly 2111 includes a limiting ring table 2112 and a limiting bolt 2113, the limiting ring table 2112 is welded and fixed on the upper fixing plate 211 at the upper orifice of the shaft hole, the inner annular surface of the limiting ring table is flush with the orifice of the shaft hole, and the tail end of the upper connecting rod 211 upwardly passes through the limiting ring table and extends out of the fixing frame to be connected with the upper movable beam of the universal testing machine; one side of the limit ring table 2112 is provided with bolt holes communicated with the inside along the radial direction, and is provided with limit bolts 2113 in a matching way, when the limit bolts 2113 are screwed down, the top ends of the limit bolts 2113 extend into the limit ring table 2112 and push the upper connecting rod 211 in the limit ring table 2112 to be tightly abutted with the limit ring table 2112, so that the upper connecting rod 22 cannot slide up and down along the fixing frame 21, and the position of the guide sliding plate 25 is fixed.
The clamp group 23 is arranged in the fixing frame 21, the clamp group comprises an upper clamp 231 and a lower clamp 232 which are respectively clamped at the upper end and the lower end of the geomembrane, the upper clamp 231 is fixed together with the guide sliding plate 25 through the tension sensor 24, the tension sensor 24 is connected with the master control calculator through the paperless recorder, the lower clamp is fixed on the lower fixing plate, the upper clamp 231 and the lower clamp 232 are both common clamps, the surface of a clamping opening of the common clamps is provided with a corrugated groove, slipping in the clamping opening when the geomembrane sample is pulled can be avoided, and the sample is guaranteed not to be damaged in the clamping opening under the action of normal fastening force.
When the geomembrane needs to be subjected to a tensile property test, the fixing frame is installed in a universal testing machine, then two ends of the geomembrane are respectively clamped in an upper clamp 231 and a lower clamp 232, then the universal testing machine 1 is controlled to start working through a master control calculator, an upper movable cross beam 11 of the universal testing machine 1 moves upwards, so that the upper clamp 231 is driven to move upwards through an upper connecting rod 22, the geomembrane is stretched, in the stretching process, the master control calculator can measure the tensile property of the geomembrane through the universal testing machine 1, and measured data are recorded through a paperless recorder; when the deformation of the geomembrane needs to be fixed and the mechanical property attenuation characteristic test along with time is carried out, the geomembrane is stretched to a test required state through a universal tester, the axial position of the upper connecting rod is fixed through the limiting assembly, so that the tensile deformation of the geomembrane can be fixed, the geomembrane is kept in a large deformation state, the attenuation characteristic of the geomembrane in the large deformation state can be measured through the tension sensor 24 by the master control computer, the attenuation characteristic data can be recorded through the paperless recorder, and the tensile die frame can be taken down from the universal tester after the axial position of the upper connecting rod is fixed through the limiting assembly, so that the service time of the universal tester is shortened, the working abrasion of the universal tester is reduced, and the service life of the universal tester is prolonged.
As shown in fig. 1 and fig. 5 to 7, the hydraulic test module comprises a hydrostatic pressure resistance tester 5 and a tensile membrane sampling device 6 installed in the hydrostatic pressure resistance tester, the hydrostatic pressure resistance tester is a common hydrostatic pressure tester and is internally provided with a measuring cup, an electronic balance, a temperature sensor, a balance bracket and a low-pressure overflow system, the drainage pressure of a drainage port at the test end of the hydrostatic pressure resistance tester 5 can be controlled through the low-pressure overflow system, the electronic balance is used for measuring the permeability of the geomembrane, the electronic balance is connected with a master control calculator, the permeability coefficient of the geomembrane can be further calculated through the measured permeability, and the hydraulic characteristic of the geomembrane in a large deformation tensile state can be analyzed.
Tensile membrane sampling device 6 includes upper fixed disk 61 and lower connection pad 62, and upper fixed disk 61 and lower connection pad 62 are together fixed with the axle center, and sealed clamping has tensile state geomembrane between upper fixed disk 61 and the lower connection pad 62, specifically:
the circumferential side surfaces of the upper fixing disc 61 and the lower connecting disc 62 are respectively and correspondingly provided with four connecting tables 63 protruding in the radial direction, the middle parts of the connecting tables are provided with bolt holes along the axial direction, the upper fixing disc 61 and the lower connecting disc 62 are respectively arranged at the front side and the rear side of the middle part of the geomembrane 9 in a stretching state in the stretching die frame 2 when in use, the four connecting tables 63 on the upper fixing disc 61 are respectively fixed with the four connecting tables 63 on the lower connecting disc 62 through bolts, so that the upper fixing disc 61 and the lower connecting disc 62 are fixed together, and when the bolts are screwed down, the upper fixing disc 61 and the lower connecting disc 62 simultaneously press the geomembrane 9 in the stretching state, so that the geomembrane 9 in the stretching state is in sealing contact with the upper fixing disc 61 and the lower connecting disc 62, and the geomembrane in.
The middle part of lower connection pad 62 is opened there is the mouth of testing water that runs through lower connection pad 62, surveys the mouth of a river and is connected with the outlet of 5 test ends of resistant hydrostatic test appearance, and a plurality of infiltration holes have been seted up to upper fixed disk and upper connection pad survey mouth of a river corresponding position department, survey the mouth of a river and have multiple, for example with the connected mode of the outlet of 5 test ends of resistant hydrostatic test appearance: a connecting flange is arranged at a drain outlet of a testing end of the hydrostatic pressure tester 5, a plurality of threaded holes are formed in the upper end face of a lower connecting disc 62 around a water measuring port 611 at intervals along the circumference and are in sealing connection with the connecting flange at the drain outlet of the testing end of the hydrostatic pressure tester 5 through bolts, an annular sealing groove 622 is formed in the lower end face of an upper connecting disc 61 between each threaded hole and the water measuring port 611, a sealing ring is installed in the sealing groove 622 and protrudes upwards out of the sealing groove 622, and when the lower connecting disc 62 is connected with the connecting flange at the drain outlet of the testing end of the hydrostatic pressure tester 5, the sealing ring can be extruded to deform, so that the sealing property between the lower connecting disc 62 and the connecting flange at the drain outlet of the testing end of the hydrostatic pressure tester 5 is further improved; when a hydraulic characteristic test is carried out, water discharged from a water outlet at the testing end of the hydrostatic pressure resistance tester 5 directly passes through the water measuring port 621 of the lower connecting disc 62 to upwards press and stretch the geomembrane, and seepage water passing through the geomembrane in the stretched state flows out from seepage holes in the upper fixing disc 61, then the seepage water is weighed by an electronic balance at intervals according to test requirements, a master control calculator can further calculate the permeability coefficient of the geomembrane according to the measured seepage, so as to analyze the hydraulic characteristic of the geomembrane in the large-deformation stretching state, and the hydraulic characteristic data is recorded by the paperless recorder 8.
Example 2
As shown in fig. 5 to 7, the upper end surface of the lower connecting disc around the water measuring port 621 is provided with an annular wave-shaped sealing line 64, the corresponding position of the upper fixing disc 61 is provided with an annular wave-shaped sealing line 64 matched with the sealing line 64 of the lower connecting disc 62 in a matching manner, when the upper fixing disc 61 and the lower connecting disc 62 are fixed together through bolts, the sealing line between the sealing lines 64 between the upper fixing disc 61 and the lower connecting disc 62 increases the contact surface between the geomembrane in a stretching state and the corresponding side disc body, and increases the contact friction force, so that the geomembrane is clamped more tightly.
Example 3
Embodiment 3 differs from embodiment 2 in that the upper section of the upstand is provided with an internally threaded section.
As shown in fig. 8, the upper sections of the four vertical posts 213 for fixing the upper fixing plate 211 and the lower fixing plate 212 together are provided with internal thread sections, and the vertical post thread sections on the upper side and the lower side of the guide sliding plate are respectively sleeved with a limit nut 26, after the axial position of the upper connecting rod 22 is fixed by a limit component 2111, the limit nuts 26 on the vertical posts 213 on the upper side and the lower side of the guide sliding plate 25 are screwed, so that the upper connecting rod 22 is contacted with the top of the guide sliding plate 25, the position of the upper connecting rod 22 is further limited by the guide sliding plate 25, and the upper connecting rod 22 is prevented from moving vertically when the fixing frame 21 is disassembled, and the test data is influenced.
Example 4
As shown in fig. 9, four top corners of the bottom surface of the lower fixing plate of the fixing frame 1 are provided with adjusting seats 3, each adjusting seat 3 comprises a fixing screw 31 and a supporting seat 32, the fixing screw 31 is vertically fixed with the lower fixing plate 212, a screw hole is vertically formed in the middle of each supporting seat 32 and is sleeved on the corresponding fixing screw in a matching manner, and the supporting seat 32 is rotated to adjust the length of the fixing screw 31 extending into the supporting seat 32, so that the level of the fixing frame is adjusted; the bottom surface of the fixed frame lower fixing plate 212 is further provided with a lower connecting rod 33, the lower connecting rod 33 and the upper connecting rod 22 are coaxially arranged, and the other end of the lower connecting rod is fixedly connected with the workbench in various ways, for example: the connection between the vertical rod 4 and the working platform is the same as the connection between the upper connecting rod 22 and the upper movable cross beam 11, and will not be described here.
Example 5
As shown in fig. 2, the lower fixing plate 212 on the left side of the lower clamp 232 is provided with the scale 12, the scale 12 is vertically welded on the lower fixing plate vertically, and the scale on the scale 12 can be referred to when the position of the upper clamp 231 is reset in the later stage, so that the operation is convenient.
Example 6
The difference between the embodiment 6 and the embodiment 5 is that a plurality of grooves are formed on one end surface of the tensile film sampling device, which is opposite to the upper fixed disk 61 and the lower connecting disk 62, and magnets are fixed on the grooves, and the grooves of the upper fixed disk 61 and the lower connecting disk 62 are correspondingly arranged, when the tensile film sampling device is used for sampling the geomembrane which is in a large deformation state and is stretched by a tensile test module, the upper fixed disk 61 and the lower connecting disk 62 are respectively arranged at the front side and the rear side of the middle part of the geomembrane 9 in a stretching state in the tensile die frame 2, the upper fixed disk 61 and the lower connecting disk 62 are attracted and fixed together through the magnets, and because the grooves of the upper fixed disk 61 and the lower connecting disk 62 are correspondingly arranged, the connecting platform 63 on the upper fixed disk 61 is abutted against the corresponding linking platform on the lower connecting disk 62, so that the upper fixed disk 61 and the lower connecting disk 62 can be fixedly connected together directly through, the installation is convenient.
Example 7
Example 7 differs from example 6 in that the stretched film frame is provided with a sampling aid.
As shown in fig. 10-12, the vertical posts 213 for fixing the upper fixing plate 211 and the lower fixing plate 212 together are threaded posts, the sampling auxiliary device 4 includes a connecting plate bracket 41 and a fixing plate bracket 42 respectively disposed at the front and rear sides of the fixture set, the connecting plate bracket 41 and the fixing plate bracket 42 have the same structure and are symmetrically disposed, the connecting plate bracket 41 includes an electromagnet, a supporting plate 43, a fork-shaped hanger 44 and an expansion rod 45, the left and right ends of the supporting plate 43 are both opened with vertical holes and are slidably fitted over the vertical posts 213 adjacent to the left and right sides in a matching manner, the supporting plate 43 can vertically slide along the vertical posts at both sides, and the vertical posts 231 at both sides of the supporting plate 43 are both fitted with nuts, and the nuts on the vertical posts at both sides of the supporting plate 43 are screwed to be in contact with the top of the supporting plate 43, so as;
as shown in fig. 12, the fork-shaped hanger 44 is slidably fixed on the supporting plate 43 by the telescopic rod 45, and the fork-shaped hanger 44 horizontally extends into the fixing frame 21 by the telescopic rod 45, the fork-shaped hanger 44 includes a connecting plate 441 parallel to the supporting plate 43, a plurality of telescopic rods 45 are arranged on the connecting plate 441 at intervals, the other ends of the telescopic rods 45 are fixed with the supporting plate 43, and the telescopic rods 45 have various types, for example: the telescopic rod 45 comprises a rod body 451 and a sliding sleeve 452, the sliding sleeve 452 is fixed on the support plate 43, one end of the rod body 451 is fixed on the connecting plate 441, and the other end is sleeved in the sliding sleeve 452 in a matching manner and extends out of the sliding sleeve 452; the left and right ends symmetry of connecting plate is equipped with and hangs tooth 442 for hang and firmly connect the pad down, and hang and be equipped with the electro-magnet on the tooth 442, after placing the pad down on forked stores pylon 44, start the electro-magnet alright be in the same place the connection pad is fixed with forked stores pylon 44, specifically:
as shown in fig. 12, the hanging teeth 442 include a front hanging plate 4421 and a rear supporting plate 4422 fixed together, and the rear supporting plate 4422 protrudes upward from the front hanging plate 4421, the front hanging teeth are used to hang the lower connecting plate, the back surface of the lower connecting plate contacts with the rear supporting plate 4422, and the rear supporting plate 4422 is used to support the lower connecting plate to prevent the lower connecting plate from tilting.
When the stretched geomembrane sampling device is required to be used for sampling the stretched geomembrane, the upper fixing disk 61 and the lower connecting disk 62 of the stretched film sampling device are respectively placed on the fork-shaped hangers 44 corresponding to the connecting plate support 41 and the fixing disk support 42, the fork-shaped hangers 44 of the upper fixing disk 61 and the lower connecting disk 62 are pushed inwards through telescopic rods, the upper fixing disk 61 and the lower connecting disk 62 on the two fork-shaped hangers 44 move oppositely and press the geomembrane 9, and when the connecting plate support 41 and the fixing disk support 42 are close to each other, electromagnets on the fork-shaped hangers of the connecting plate support 41 and the fixing disk support 42 attract each other, so that the fork-shaped hangers of the connecting plate support 41 and the fixing disk support 42 move oppositely and are adsorbed together, an operator only needs to fix the upper fixing disk 61 and the lower connecting disk 62 together through bolts, and the use and.
Claims (8)
1. The device for testing the hydraulic property decay of the geomembrane in the large deformation state comprises a master control calculator, a paperless recorder and the geomembrane, and is characterized by further comprising a tensile test module and a hydraulic test module, wherein the tensile test module comprises a universal testing machine and a tensile membrane frame, the tensile membrane frame is installed on a workbench of the universal testing machine, the tensile membrane frame comprises a fixed frame, a guide sliding plate, an upper connecting rod, a clamp group and a tension sensor, the fixed frame comprises an upper fixed plate and a lower fixed plate which are vertically arranged in parallel at intervals, the upper fixed plate and the lower fixed plate are fixedly connected together through a plurality of vertical columns, and the lower fixed plate is fixedly connected with the workbench; the guide sliding plates are arranged between the upper fixing plate and the lower fixing plate in parallel, and sliding holes are formed in the positions, corresponding to the vertical columns, of the periphery of each guide sliding plate and are sleeved on the corresponding vertical columns in a matched mode; the middle part of the upper fixing plate is provided with a shaft hole, a limiting assembly is arranged at the hole opening of the shaft hole, the upper connecting rod is sleeved in the shaft hole in a matching manner, one end of the upper connecting rod extends into the fixing frame to be vertically connected with the guide sliding plate, the other end of the upper connecting rod penetrates through the limiting assembly outwards to extend out of the fixing frame to be connected with an upper movable cross beam of the universal testing machine, and the limiting assembly is used for fixing the axial position of the upper connecting rod; the clamp group is arranged in the fixing frame and comprises an upper clamp and a lower clamp which are respectively clamped and fixed at the upper end and the lower end of the geomembrane, the upper clamp is fixed with the guide sliding plate through a tension sensor, the tension sensor is connected with the master control calculator through a paperless recorder, and the lower clamp is fixed on the lower fixing plate; the hydraulic test module includes resistant hydrostatic test appearance and installs the tensile membrane sampling device in resistant hydrostatic test appearance, tensile membrane sampling device includes upper fixed disk and lower connection pad, upper fixed disk and lower connection pad are together fixed with the axle center, and between upper fixed disk and the lower connection pad the sealed inherent tensile state geomembrane that presss from both sides, open at the middle part of lower connection pad has the water logging mouth that runs through the upper connection pad, surveys the mouth of a river and the outlet sealing connection of resistant hydrostatic test appearance test end, a plurality of infiltration holes have been seted up with lower connection pad water logging mouth corresponding position department to the upper fixed disk.
2. The device for testing the hydraulic property decay of the geomembrane under the large deformation state according to claim 1, wherein the universal testing machine is connected with a master control calculator through a paperless recorder; and the electronic balance for the hydrostatic pressure test is connected with a master control calculator.
3. The device for testing the hydraulic property decay of the geomembrane under the large deformation state as claimed in claim 1, wherein a plurality of adjusting seats are fixed at intervals around the bottom of the fixing frame, each adjusting seat comprises a fixing screw and a supporting seat, the fixing screw is vertically fixed with the lower fixing plate, and a screw hole is vertically formed in the middle of each supporting seat and is matched and sleeved on the corresponding fixing screw.
4. The device for testing the hydraulic property decay of the geomembrane under the large deformation state according to claim 3, wherein the bottom surface of the lower fixing plate of the fixing frame is provided with a lower connecting rod, the lower connecting rod and the upper connecting rod are coaxially arranged, and the other end of the lower connecting rod is fixedly connected with the workbench.
5. The device for testing the hydraulic property decay of the geomembrane under the large deformation state according to claim 1, wherein the upper section of the vertical column is provided with internal threads, and the thread sections of the vertical column on the upper side and the lower side of the guide sliding plate are respectively sleeved with a limiting nut.
6. The device for testing the hydraulic property decay of the geomembrane under the large deformation state according to claim 1, wherein the limiting assembly comprises a limiting ring table and a limiting bolt, the limiting ring table is fixed on an upper fixing plate at an upper orifice of the shaft hole, and the tail end of an upper connecting rod outwards passes through the limiting ring table and extends out of a fixing frame to be detachably connected with an upper movable cross beam of the universal testing machine; and one side of the limiting ring platform is provided with bolt holes communicated with the inside along the radial direction, and is provided with limiting bolts in a matching way.
7. The device for testing the hydraulic property decay of the geomembrane under the large deformation state as claimed in claim 1, wherein four connecting tables protruding in the radial direction are correspondingly arranged on the circumferential side surfaces of the upper fixing disc and the lower connecting disc at intervals, and a bolt hole is formed in the middle of each connecting table in the axial direction.
8. The device for testing the hydraulic property decay of the geomembrane under the large deformation state according to claim 1, wherein a scale is arranged on the lower fixing plate at one side of the lower clamp, and the scale is vertically fixed on the lower fixing plate along the vertical direction.
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