CN206114469U - That simulates different filler cracks moves water slip casting test device - Google Patents
That simulates different filler cracks moves water slip casting test device Download PDFInfo
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- CN206114469U CN206114469U CN201621143225.3U CN201621143225U CN206114469U CN 206114469 U CN206114469 U CN 206114469U CN 201621143225 U CN201621143225 U CN 201621143225U CN 206114469 U CN206114469 U CN 206114469U
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Abstract
The utility model provides a that simulates different filler cracks moves water slip casting test device, belongs to the geotechnical engineering field, and the device is moving diffusion law research of bentonite thick liquid and the experimental study of grouting for water blocking effect in the sand filled opening under the water condition. Carrying out slip casting under the good condition of parameter setting such as head pressure, water injection flow, grouting pressure, having laid purpose -made rubber pad at the test model incasement, corresponding aperture position has set up slip casting pipe and pressure measuring equipment, and water injection device, slip casting device and liquid waste collection device have been connected to its outer end, carries out the thick liquid configuration, carry out the water injection to the device after, carry out slip casting again. This device has carried out one -dimensional slip casting analogue test to pressure distribution condition when this has studied under the seepage flow condition in the filled opening slip casting and along with the change rule of thick liquid diffusion has improved the efficiency of slip casting.
Description
Technical field
The utility model is related to a kind of dynamic water grouting test device in simulation different fillings crack, belongs to Geotechnical Engineering skill
Art field.
Background technology
In current Geotechnical Engineering grouting method, slurries are injected after rock-soil layer by certain pressure, the seepage flow of slurries
Hydrodynamic condition and rock soil medium crack, the distribution situation of hole are passively depended on to a great extent, usually cannot be accurate
Reach and administer position, so that it cannot assess the effect of sealing after slip casting, in a large number waste and man-hour are delayed to cause material, and slip casting is imitated
It is really poor.
Utility model content
At present, the research for ejection for water plugging test in stratum under river channels is little, and the purpose of this utility model is to carry
For the grouting method under a kind of river channels.And the stagnant water effect after test is to slip casting is detected.
For achieving the above object, the technical solution adopted in the utility model is a kind of dynamic water in simulation different fillings crack
Grouting test device, the device includes water head tank (1), water pressure readout instrument (2), flowmeter (3), inlet valve (4), very heavy
Top (5), injected hole (6), glass cover-plate (7), waste collecting device (8), pressure gauge (9), slurry storage tank (10), pressure transmitter are read
Number instrument (11), DV video cameras (12), model casing.Model casing is the main body of this experimental rig, and model casing is horizontally disposed, model casing
Two ends are supported by jack (5), and bottom is provided with several holes being evenly arranged, and glass cover-plate (7) is stamped at top；One end of model casing
Water head tank (1) is connected with, the other end is connected with the connecting line of waste collecting device (8), water head tank (1) and model casing
Water pressure readout instrument (2), flowmeter (3), inlet valve (4) are provided with, water pressure readout instrument (2) is arranged on entering for model casing side
At the mouth of a river, inlet valve (4) is arranged in the middle of connecting line, and flowmeter (3) is arranged on the side of inlet valve (4)；It is several equal
In the hole of even arrangement, a hole is elected injected hole (6) as and is connected with slurry storage tank (10), and the injected hole (6) is with slurry storage tank (10) even
The pipeline for connecing is provided with pressure gauge (9)；Remaining hole is pressure tap, and pressure tap is connected respectively with pressure transmitter readout instrument (11)；
DV video cameras (12) set up the surface of injected hole (6).
Rational height of the rational height of water head tank (1) more than glass cover-plate (7).
The rubber blanket of simulation fracture width change is provided with model casing.
This experimental rig each interface makees encapsulation process with unsintered tape, preservative film and bentonite mud.
There is provided certain head height using water pipe and water head tank (1) in test, and connect water pressure readout instrument (2) with
When monitor the water pressure change of injection model case, hydraulic pressure system takes with simulation box system and is tightly connected, and has valve in water inlet
Door switch (4) connects.In order to reduce experimental error, the discharge of injection model case is monitored with flowmeter (3).
Filling system adopts grouting pump, and pressure is controlled using pressure gauge (9), by the reading of observed pressure table (9)
By the slurries slurry storage tank (10) for having configured from being injected in model casing.
In test the osmotic pressure during slip casting is supervised using intelligence static state survey monitor data handling system (11)
Survey, osmometer is arranged in slip casting main body before test, the osmotic pressure to liquid generation under river channels and during slip casting
Change carries out real-time monitored.A hole is selected as injected hole, other holes just can be used to pressure tap.
This device is in addition to the factor such as bentonite ratio is discussed in water injection pressure, grouting pressure and slurries, also
The factors such as stratigraphic dip and fracture width are added, result of the test is had more with reference to property.Place very heavy in the side position of model casing two
Top (5) carrys out the certain angle of jack-up and comes simulated formation inclination angle；Special rubber blanket is put in model casing and carrys out simulation fracture width
Change.Finally, for not test for contamination environment, the water flowed out from delivery port is collected by waste collecting device (8)；In slip casting
The surface in hole sets up the situation of DV video cameras (12) observation slurries diffusion in time.
Compared with prior art, the utility model has the advantages that：
1st, the utility model device volume is little, lightweight, easy to install.Water injection pressure is easy to control with grouting pressure
System, and the slurries spread condition that can observe in time after slip casting of the setting of device for pressure measurement and DV video cameras and sealing
Effect, improves the degree of accuracy and the effect of slip casting, material-saving.
2nd, this experimental rig is also added into the factors such as stratigraphic dip and fracture width on the basis of river channels slip casting, makes
Result of the test is had more with reference to property.
3rd, the utility model device uses the material can be from market purchasing finished product, and device overall structure is simply without special
Structural requirement.
Description of the drawings
Fig. 1 is experimental rig figure of the present utility model.
Fig. 2 is model casing system dimension figure of the present utility model.
Fig. 3 is test model case Angulation changes schematic diagram of the present utility model.
Fig. 4 is that test model case fracture width of the present utility model changes schematic diagram.
In figure：1st, water head tank, 2, water pressure readout instrument, 3, flowmeter, 4, inlet valve, 5, jack, 6, injected hole,
7th, glass cover-plate, 8, waste collecting device, 9, pressure gauge, 10, slurry storage tank, 11, pressure transmitter readout instrument, 12, DV video cameras.
Specific embodiment
A kind of dynamic water grouting test device in simulation different fillings crack, the device includes water head tank (1), water pressure
Readout instrument (2), flowmeter (3), inlet valve (4), jack (5), injected hole (6), glass cover-plate (7), waste collecting device
(8), pressure gauge (9), slurry storage tank (10), pressure transmitter readout instrument (11), DV video cameras (12), model casing；
Model casing is the main body of this experimental rig, and the sealing for considering casing is needed during experimental design, so test mould
Molding box surrounding is cast using steel plate and prevents gas leakage, its size：Long 102cm, width 50cm, thickness 2cm, each 4cm in edge on both sides, mould
Hole (6) distribution of molding box and size indication (in units of cm) as shown in Fig. 2 the distance in each hole is at intervals of 10cm, aperture
A diameter of 8mm, is provided with the rubber blanket of simulation fracture width change, as shown in Figure 4 in model casing.Additionally, model casing is also equipped with glass
Glass cover plate (7), scale is marked with cover plate along aperture distribution arrangement, in order to study Changing Pattern when slurries spread.In model
Respectively there is a jack (5) on the both sides of case, for changing the angle of model casing.
There is provided certain head height using water pipe and water head tank (1) in test, and connect water pressure readout instrument (2) with
When monitor the water pressure change of injection model case, hydraulic pressure system takes with simulation box system and is tightly connected, and has valve in water inlet
Door switch (4) connects.In order to reduce experimental error, the discharge of injection model case is monitored with flowmeter (3).
Filling system adopts grouting pump, pressure to be controlled using pressure gauge (9), will match somebody with somebody by the reading of observed pressure table
The slurries slurry storage tank (10) put is from being injected in model casing.
Pressure transmitter readout instrument (11) in test is using intelligence static state survey monitor data handling system to slip casting process
In osmotic pressure be monitored, test before osmometer is arranged in slip casting main body, under river channels and during slip casting
The osmotic pressure change that liquid is produced carries out real-time monitored.A hole is selected as injected hole, other holes just can be used to measure
Pore pressure.
Sealing between model casing and glass plate lid is relatively complicated, is also the difficult point of test.Jing is tested, bentonite mud
Good encapsulant, and bentonite mud is thick dilute adjustable, it is easy to clear up, it is simple, effect substantially, especially when with swollen
After the native mud of profit has been sealed, screw is installed, then surrounding is rolled in the preservative film bar for having smeared bentonite mud in surrounding.Additionally, being
Not test for contamination environment, the water flowed out from delivery port is by waste collecting device (8) collection；Set up in the surface of injected hole
The situation of DV video cameras (12) observation slurries diffusion in time.
Certain head height is controlled by water head tank (1), using required during stable water-column simulated test
Hydraulic condition, the slurries for configuring different proportion are put in slurry storage tank (10), are monitored by the control of pressure gauge (9), use grouting pump
To change grouting pressure, the slip casting in circumstance of flowing water under different affecting factors is realized.
This experimental rig can also change stratigraphic dip to study river channels under slurries Diffusion Law and sealing effect
Really, concrete operations are to place jack (5) in the side position of model casing two to carry out the certain angle of jack-up.
This device can make result of the test become relatively reliable to be studied from this influence factor of Fracture Width,
Allow grouting test with more reference property, concrete operations are：A block length and model casing are put in the test model case of 2cm thickness
It is identical, the rubber blanket of the right-angle triangle of a length of 1.5cm in base, and on rubber blanket, position corresponding with model casing aperture
Put and stamp aperture, it is ensured that slip casting and the measurement of pore pressure force, can thus realize the slip casting diffusion under the conditions of different fracture widths
The research of rule, the setting of 1.5cm ensures that water can successfully be flowed in and out in model casing, model casing schematic diagram such as Fig. 4
Shown, (a) in Fig. 4 represents that the width along the direction crack of liquid flowing is increasing, and (b) in Fig. 4 represents the width in crack
Degree is less and less.
In test the pore water pressure during slip casting is monitored by laying osmometer, is read by pressure transmitter
Number instrument (11) reads data, and the situation of change to pore water pressure before and after slip casting is analyzed, and obtains pore water pressure and note
Contact between slurry stagnant water effect.Osmometer is laid in respectively Grouting Pipe both sides in test, and adjacent spacing is 10cm, arrangement
As aperture arrangement mode, concrete arrangement is shown in Fig. 2.
The implementing procedure of this device is as follows：
S1 selects injected hole (6) in test model case, then will set osmometer for measured hole at remaining aperture
Pressure.
S2 injected holes are taped up with 50 mesh non-woven fabrics and width, prevent filler particle from entering injected hole and Grouting Pipe
Road, and then block slip casting passage.
S3 is put into as the special good rubber blanket of this test in test model case, then in the remaining space of 2 cm thicks
It is interior to be fitted into test filler (all filling in test model case), it is first in model casing to load some fillers, Ran Houyong more
One rectangular plate-like thing more little wider than model casing erases filler unnecessary in model casing, it is ensured that model casing inner stuffing
Enough fillings, and be unlikely to local and rough and uneven in surface phenomenon occur (test every time needs the weight for weighing filler in model casing).
S4 connects the water inlet and delivery port at model casing two ends, needs to carry out seal operation where sealing, in mould
The surrounding of molding box smears last layer bentonite mud, and then glass cover-plate (7) is covered on model casing, and bolt screw is all installed
After good.Test first, with injected hole as the origin of coordinates, of ruler and marker pen, the scale designation on work on glass plate lid, make
Complete mark, then ready-made scale designation is sealed with wide adhesive tape, prevent from meeting water disappearance during follow-up test.
Tank (1) is arranged to preset height and is filled thereto water by S5, opens inlet valve (4), makes current through mould
Flow out from delivery port after molding box, its discharge and hydraulic pressure are determined after current are basicly stable.
S6 connects osmometer with intelligence static state survey monitor data handling system (11), prepares to start data acquisition；Will
It is inner that slurries by preparing are added to slurry storage tank (10), connects each device, it is ensured that each pipeline and equipment it is unobstructed and good,
Prepare slip casting.
S7 opens inlet valve (4), carries out data acquisition, starts slip casting, and by controlling grouting pressure table (9) voltage stabilizing is kept
Slip casting, DV video recorders (12) is mounted on tripod, is placed on fixed position directly over model casing, observes grout spreading range, and
And inlet water stream situation of change is observed at any time, treat that slurries diffusion length no longer increases or slurries have diffused into model casing
Border, off-test.
S8 off-tests, close each equipment, clean each instrument, and shift design factor, repetition above step is carried out down
Battery of tests.
Affecting the factor of slurries diffusion length, grouting amount size and slurries water plugging effect has a lot, such as grouting pressure,
Slurries ratio of mud etc., when grouting simulation test is carried out, can also change several factors, such as water pressure and uninterrupted, filling
Species, selection of slip casting hole site of thing etc..The advantage of this experimental rig is can also to change inclination angle, the simulation crack of model casing
Width.This experimental rig is installed and easy to operate, for test objective, it is considered to certain experimental error factor, as far as possible mould
The state of actual formation is drawn up, using the reference as actual mortar depositing construction.
With reference to specific embodiment, the utility model is described in further detail.
Embodiment
Experiment is simulated to slip casting under circumstance of flowing water using this experimental rig, test model case as shown above, is selected
Injected hole 6 is selected as injected hole, other apertures are used for measuring pore pressure force, and there is respectively the sky of two 2cm length the both sides of model casing
Groove, for arranging water inlet and delivery port and hydraulic gage.This test adopts fine grain quartz sand research experiment, according to
Soil test specification carries out indoor basic soil test and obtains testing the physical property index and sand sample particle diameter distribution situation of sand sample,
See Tables 1 and 2.
The quartz sand density of table 1 and void ratio
The 300g samples of table 2 quartz sand test sand sample particle diameter distribution table
The adopted grouting serous fluid of test is to be added water to mix together with commercially available sodium bentonite.3 are used in test
Plant the bentonite slurry of different ratio.As shown in table 3.
The bentonite slurry of the different ratio of table 3
0.5m, 1.0m and 1.5m are respectively set to according to the difference of kinetic head height；According to the difference of grouting pressure, note
Slurry pressure is respectively 10kPa, 20kPa and 40kPa；According to the bentonite slurry of different ratio, water and bentonitic quality score
Wei 5:1、4:1 and 3:1, nine groups of tests are carried out altogether.This test three influence factors mainly including slurries the ratio of mud,
Head height and grouting pressure.Tested according to above-mentioned test procedure, variable is changed successively and repeats to test, to test
As a result it is analyzed.
Test results and analysis
The analysis method of every group of result of the test, uses picture in combination with slurries diffusion length image to divide
Analysis.On picture, select among slip casting process that slurries diffusion length is big from starting to occur no longer becoming or slurries are diffused into per group
Picture in the time period on model casing border come illustrate slurries spread process；On slurries diffusion length image, one along length
Direction, according to water (flow) direction the diffusion length in direction against the current and the downstream diffusion length in direction are divided into, and another is in the width direction
(regulation longer coordinate line be length direction) is illustrating that slurries diffusion length is changed over.
The impact of flowing pressure
River channels are respectively the stable head of 0.5m, 1.0m and 1.5m using head height H, and grouting pressure P is
40kPa, water and bentonite mass ratio are 4:1, result of the test is shown in Table 4.
Slurries diffusion effective length when the head height of table 4 is different
Can be seen that in the case where other factors are certain by data in table, with the increase of head height, slurries are inverse
In increase, impact of the head pressure to section against the current causes section slurry against the current to the diffusion length of water section and downstream section less than section downstream
The increment value of liquid diffusion length is less, and downstream the increment value of section slurries diffusion length is larger, and in the certain situation of head height
Under, downstream the diffusion length of section slurries is bigger than section slurries diffusion length against the current.
The impact of grouting pressure
Head height H of flowing pressure is 1.5m, and grouting pressure P is 10kPa, 20KPa and 40kPa, water and swelling soil property
Amount is than being 4:1, result of the test is shown in Table 5.
Slurries diffusion effective length when the grouting pressure of table 5 is different
Can be seen that in the case where other factors are certain by data in table, with the increase of grouting pressure, slurries are inverse
The diffusion length of water section and downstream section is in increase, against the current section and downstream more apparent, this explanation of section slurries diffusion length increase
Grouting pressure affects larger to slurries diffusion length；And in the case of certain grouting pressure, the diffusion length of section slurries downstream
It is big than section slurries diffusion length against the current.
The impact of water and bentonite mass ratio
Head height H of flowing pressure is 1.5m, and it is 40KPa that grouting pressure is P, and water and bentonite mass ratio are 5:1、4:
1 and 3:1, result of the test is shown in Table 6.
Slurries diffusion effective length when the water of table 6 is different with bentonite mass ratio
Can be seen that in the case where other factors are certain by data in table, with the increase of bentonite ratio, slurries exist
Against the current section and downstream the diffusion length of section reduce, against the current section and downstream section slurries diffusion length reduction it is more apparent, this says
Bright bentonite dosage affects larger to slurries diffusion length；And in the case of certain bentonite dosage, the expansion of section slurries downstream
Scattered distance is big than section slurries diffusion length against the current.Knowable to result of the test, 5:1 concentration is most beneficial for slurries diffusion velocity and slurry
The last diffusion length of liquid, but consider slip casting plugging effect, the depth of test is also needed on concrete engineering with the slurries of what concentration
Enter research.
The impact of stratigraphic dip
This experimental rig can also change inclination angle to study river channels under slurries Diffusion Law and stagnant water effect, tool
Gymnastics places jack as in the side position of model casing two, and variable incidence is chosen to be 0 °, 15 °, 30 °, is illustrated in fig. 3 shown below.This
Head height H of test flowing pressure is 1.5m, and grouting pressure P is 40kPa, and water and bentonite mass ratio are 4:1, from test knot
Fruit understands that angle jack-up is bigger, and downstream section slurries diffusion length is bigger, and against the current section slurries diffusion length is less.
The preferred embodiment cited by the utility model is these are only, and is not used to limit protection model of the present utility model
Enclose, equivalent modification or change that the those of ordinary skill in art is made with the utility model are same to belong to
In scope of patent protection of the present utility model.
Claims (4)
1. a kind of dynamic water grouting test device in simulation different fillings crack, it is characterised in that：The device includes water head tank
(1), water pressure readout instrument (2), flowmeter (3), inlet valve (4), jack (5), injected hole (6), glass cover-plate (7), useless
Liquor collecting device (8), pressure gauge (9), slurry storage tank (10), pressure transmitter readout instrument (11), DV video cameras (12), model casing；
Model casing is the main body of this experimental rig, and model casing is horizontally disposed, and the two ends of model casing are supported by jack (5), and bottom is provided with
It is stamped glass cover-plate (7) in several holes being evenly arranged, top；One end of model casing is connected with water head tank (1), other end connection
There is waste collecting device (8), in water head tank (1) and the connecting line of model casing water pressure readout instrument (2), flowmeter are provided with
(3), inlet valve (4), water pressure readout instrument (2) is arranged on the water inlet of model casing side, inlet valve (4) company of being arranged on
In the middle of adapter road, flowmeter (3) is arranged on the side of inlet valve (4)；In several holes being evenly arranged, slip casting is elected in a hole as
Hole (6) is simultaneously connected with slurry storage tank (10), and the pipeline that the injected hole (6) is connected with slurry storage tank (10) is provided with pressure gauge (9)；Remaining
Hole is pressure tap, and pressure tap is connected respectively with pressure transmitter readout instrument (11)；DV video cameras (12) are setting up injected hole (6) just
Top.
2. the dynamic water grouting test device in a kind of simulation different fillings crack according to claim 1, it is characterised in that：
Rational height of the rational height of water head tank (1) more than glass cover-plate (7).
3. the dynamic water grouting test device in a kind of simulation different fillings crack according to claim 1, it is characterised in that：
The rubber blanket of simulation fracture width change is provided with model casing.
4. the dynamic water grouting test device in a kind of simulation different fillings crack according to claim 1, it is characterised in that：
This experimental rig each interface makees encapsulation process with unsintered tape, preservative film and bentonite mud.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621143225.3U CN206114469U (en) | 2016-10-20 | 2016-10-20 | That simulates different filler cracks moves water slip casting test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621143225.3U CN206114469U (en) | 2016-10-20 | 2016-10-20 | That simulates different filler cracks moves water slip casting test device |
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| CN201621143225.3U Active CN206114469U (en) | 2016-10-20 | 2016-10-20 | That simulates different filler cracks moves water slip casting test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338457A (en) * | 2016-10-20 | 2017-01-18 | 北京市公路桥梁建设集团锐诚工程试验检测有限公司 | Hydrodynamic grouting test device simulating different filler gaps |
| CN107121371A (en) * | 2017-04-20 | 2017-09-01 | 山东大学 | A kind of simulation laboratory test system and method suitable for layer of sand osmotic grouting |
| CN108562515A (en) * | 2018-03-27 | 2018-09-21 | 东北大学 | A kind of Grouting Seepage in Rockmass slurries diffusion multifactorial experiment system |
| CN109142158A (en) * | 2018-09-14 | 2019-01-04 | 太原理工大学 | A kind of experimental provision and method simulated slurries diffusion admittance and detect grouting parameter |
| CN110927018A (en) * | 2019-12-12 | 2020-03-27 | 山东科技大学 | Simulation model for water-borne microparticle migration process in coal fracture structure and use method |
| CN111829928A (en) * | 2020-07-14 | 2020-10-27 | 中勘资源勘探科技股份有限公司 | Method for detecting diffusion range of grouting |
| CN112285332A (en) * | 2020-10-20 | 2021-01-29 | 上海公路桥梁（集团）有限公司 | Simulation test method for antifriction grouting of large-section rectangular jacking pipe |
| CN112611683A (en) * | 2020-12-28 | 2021-04-06 | 合肥工业大学 | Monitoring devices that solute that adjustable crack gap is wide moved |
| CN114460281A (en) * | 2022-01-09 | 2022-05-10 | 三峡大学 | Experimental device and method for repairing concrete cracks of film bag by adopting vacuum grouting |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338457A (en) * | 2016-10-20 | 2017-01-18 | 北京市公路桥梁建设集团锐诚工程试验检测有限公司 | Hydrodynamic grouting test device simulating different filler gaps |
| CN107121371A (en) * | 2017-04-20 | 2017-09-01 | 山东大学 | A kind of simulation laboratory test system and method suitable for layer of sand osmotic grouting |
| CN108562515A (en) * | 2018-03-27 | 2018-09-21 | 东北大学 | A kind of Grouting Seepage in Rockmass slurries diffusion multifactorial experiment system |
| CN108562515B (en) * | 2018-03-27 | 2023-11-28 | 东北大学 | Multi-factor test system for crack rock mass grouting slurry diffusion |
| CN109142158A (en) * | 2018-09-14 | 2019-01-04 | 太原理工大学 | A kind of experimental provision and method simulated slurries diffusion admittance and detect grouting parameter |
| CN109142158B (en) * | 2018-09-14 | 2020-08-28 | 太原理工大学 | Experimental device and method for simulating slurry diffusion channel and detecting grouting parameters |
| CN110927018B (en) * | 2019-12-12 | 2022-08-23 | 山东科技大学 | Simulation model for water-borne microparticle migration process in coal fracture structure and use method |
| CN110927018A (en) * | 2019-12-12 | 2020-03-27 | 山东科技大学 | Simulation model for water-borne microparticle migration process in coal fracture structure and use method |
| CN111829928A (en) * | 2020-07-14 | 2020-10-27 | 中勘资源勘探科技股份有限公司 | Method for detecting diffusion range of grouting |
| CN112285332B (en) * | 2020-10-20 | 2023-04-21 | 上海公路桥梁（集团）有限公司 | Simulation test method for antifriction grouting of large-section rectangular jacking pipe |
| CN112285332A (en) * | 2020-10-20 | 2021-01-29 | 上海公路桥梁（集团）有限公司 | Simulation test method for antifriction grouting of large-section rectangular jacking pipe |
| CN112611683A (en) * | 2020-12-28 | 2021-04-06 | 合肥工业大学 | Monitoring devices that solute that adjustable crack gap is wide moved |
| CN112611683B (en) * | 2020-12-28 | 2023-10-24 | 合肥工业大学 | Device for monitoring solute transport with adjustable gap width |
| CN114460281A (en) * | 2022-01-09 | 2022-05-10 | 三峡大学 | Experimental device and method for repairing concrete cracks of film bag by adopting vacuum grouting |
| CN114460281B (en) * | 2022-01-09 | 2023-09-29 | 温州市文景市政园林有限公司 | Experimental device and method for repairing concrete cracks of membrane bags by adopting vacuum grouting |
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