CN105862937B - One kind pressure, pull out comprehensive laboratory experiment stake bath scaled model experimental device - Google Patents
One kind pressure, pull out comprehensive laboratory experiment stake bath scaled model experimental device Download PDFInfo
- Publication number
- CN105862937B CN105862937B CN201610300450.1A CN201610300450A CN105862937B CN 105862937 B CN105862937 B CN 105862937B CN 201610300450 A CN201610300450 A CN 201610300450A CN 105862937 B CN105862937 B CN 105862937B
- Authority
- CN
- China
- Prior art keywords
- lever
- model
- pile
- experimental
- stake
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses one kind pressure, pull out comprehensive laboratory experiment stake bath scaled model experimental device, including Model Pile, experimental box body, loading device, monitoring device and experiment auxiliary device；Model Pile is located at the middle position of experimental box body, loading device includes lever and Shi Chong counterweights, and lever one end swings and is connected on the side box wall of model casing one, and the application point of lever is located at the top of Model Pile, the lever other end is passed through to side box wall, and its end is provided with suspender suspention and applies weight counterweight；Monitoring device includes measuring system, sensor-based system, signal acquiring system and signal processing system；The active force for applying weight counterweight is acted in Model Pile by lever and/or the steel wire rope being provided with by lever.Beneficial effect of the present invention is obvious, can easily carry out all kinds of compressive piles, uplift pile experiment, save manpower and materials, improve the efficiency of experiment.
Description
Technical field
The invention belongs to field of civil engineering, is related to a kind of earthwork test Instrument equipment, and in particular to one kind pressure, pulls out synthesis
Laboratory experiment stake bath scaled model experimental device.
Background technology
Performance test experiment for stake is always the theoretical important means of pile foundation engineering.But carry out outdoor field experiment
When, it is necessary to call a large amount of plant equipment and manpower and materials.
The outer field test of conventional chamber can not be directly observed the situation of change of pile body surrounding soil, it is difficult to after to compression
Pile body around the soil body carry out sampling research, during experiment bearing capacity of pile can be influenceed by bearing capacity of pile tip etc. it is many not
Just.In addition, traditional outdoor experiment is difficult to the resistance to shear of soil situation of whole experiment process is monitored and recorded, for stake top
Load and sedimentation can not accurately be measured.
The content of the invention
It is an object of the invention to provide a kind of pressure for test pile performance, pull out comprehensive laboratory experiment stake model experiment dress
Put.
Technical scheme is as follows：
One kind pressure, pull out comprehensive laboratory experiment stake bath scaled model experimental device, including Model Pile, experimental box body, loading device, monitoring
Device and experiment auxiliary device, Model Pile are located at the middle position of experimental box body, and loading device includes lever and Shi Chong counterweights, thick stick
Bar one end swings and is connected on the side box wall of model casing one, and the application point of lever is located at the top of Model Pile, and the lever other end passes through
To side box wall, its end is provided with suspender suspention and applies weight counterweight；Monitoring device includes measuring system, sensor-based system, signal acquisition
System and signal processing system；The active force for applying weight counterweight is acted on by lever and/or the steel wire rope being provided with by lever
In Model Pile.
Further, experimental box body is made up of tank tower, bottom plate and four sides side wall, and four sides side wall is at least three different portions
Position is provided with movable window；Multi-function experimental hole is provided with bottom plate, Multi-function experimental pore area has movable port lid.
Further, the four sides side wall of the experimental box body is made up of three face steel plate walls and a face safety glass wall；In steel
Change glass has three different positions to be provided with movable window on facing the wall and meditating.
Further, apply weight counterweight active force by leverage, i.e. compression test, the end of lever are straight in Model Pile
Connect suspention and apply weight counterweight, the active force of lever is acting downwardly on the upper end of Model Pile by tension and compression axle power meter, and tension and compression axle power meter is set
Put below the application point of lever.
Further, the steel wire rope that is provided with by lever of active force for applying weight counterweight acts on i.e. resistance to plucking examination in Model Pile
Test, steel cable sliding is arranged between the application point of lever and lever end, and weight counterweight, steel wire rope are applied in one end suspention of steel wire rope
The other end active force upper end of Model Pile is acting upwardly on by tension and compression axle power meter, tension and compression axle power meter is arranged on the effect of lever
Point lower section.
Further, a pulley, steel wire rope and the two pulleys are respectively equipped with the application point of lever and lever end
It is slidably connected, steel wire rope is connected by the hook on the suspension ring and Model Pile on tension and compression axle power meter.
Further, measuring system includes settlement gauge, Load Meter and resistance to shear of soil measuring instrument.
Further, settlement gauge includes laser range finder, dial gauge and rigid test board, and rigidity tests plate level peace
Mounted in the upper end of Model Pile, the laser probe of laser range finder faces rigid test board, and two dial gauges are symmetricly set on just
On property test board；Load Meter is the tension and compression axle power meter for being arranged on simulation stake top, and tension and compression axle power meter is arranged on the effect of lever
Point lower section；Resistance to shear of soil measuring instrument is to be embedded in experimental box and be evenly distributed on the soil pressure cell around the simulation pile body soil body.
Further, experiment auxiliary device includes tester laying rack, and settlement gauge is fixed on settlement instrument laying rack
On；Laser range finder is arranged on the lower section of instrument laying rack, and the laser probe of laser range finder faces rigid test board 5.
Further, a suspention bolt being connected with applying weight counterweight is provided with the outside of the end of lever；In the inner side of lever, thick stick
The application point of bar and lever end are respectively equipped with a pulley, and steel wire rope is connected by two pulleys with lever slips.
Beneficial effect of the present invention is obvious：
（1）Loading system is optimized the present invention, and using simple lever principle, regulation is applied to simulation stake top
Load, rubbish, the different load experiments of pressure can be quickly carried out, the utilization of pulley can facilitate carries out pullout tests to simulation stake, saves
Plant equipment and other manpower and materials.
（2）The bottom hole that bottom plate is provided with is Multi-function experimental hole, due to the inevitable stake of field experiment outside conventional chamber
Bearing capacity is held, the experimental analysis to single bearing capacity of pile has an impact.Therefore we portion sets multi-functional reality in the soleplate
Verify.When being tested, stake end does not have supporting course, does not produce bearing capacity of pile tip, the measuring precision to pile body side friction
It is obviously improved.
（3）The four sides side wall of experimental box body includes three face steel plate walls and a face safety glass wall, and experimental box body is ensureing certainly
Own high intensity can be directly observed simulation pile body surrounding soil by safety glass wall simultaneously.
（4）Safety glass wall has three different positions to be provided with movable window, and these three movable windows can be opened freely
Close, the convenient soil sample taken out around compression pile body, be advantageous to analyze these soil samples.
（5）Measuring system is made up of instrument laying rack, dial gauge, tension and compression axle power meter, laser range finder and soil pressure cell.Hundred
The application of table and laser range finder is divided make it that the measurement to pile body settling amount is more accurate.Soil pressure cell is according to certain altitude spacing
It is distributed in around the pile body soil body, axle power meter is arranged in stake top, and these instruments pass through sensor-based system and signal acquiring system phase
Even.Signal acquiring system and sensor-based system are 64 high-accuracy remote sensing casees, can be in real time to stake top load and soil
The ess-strain of body measures record.Signal processing system is computer terminal, is responsible for record analysis and the every experiment number of processing
According to.
Brief description of the drawings
Fig. 1 is the main structure diagram of the present invention.
Fig. 2 is the backsight structural representation of the present invention.
Reference：Instrument laying rack 1, laser range finder 2, tension and compression axle power meter 3, dial gauge 4, rigid test board 5, lever
6, weight counterweight 7 is applied, signal acquiring system 8, signal processing system 9, soil pressure cell 10, Multi-function experimental hole 11, Model Pile 12, is inserted
Pin 13, steel wire rope 14, pulley 15.
Embodiment
Below in conjunction with the accompanying drawings, the invention will be further described.
One kind such as Fig. 1 is pressed, pulls out comprehensive laboratory experiment stake bath scaled model experimental device, including Model Pile 12, experimental box body, loading
Device, monitoring device and experiment auxiliary device, Model Pile 12 are located at the middle position of experimental box body, and loading device includes lever 6
With apply weight counterweight 7, the one end of lever 6 swings and is connected on the side box wall of model casing one, and the application point of lever 6 is located at the upper of Model Pile 12
Side, the other end of lever 6 are passed through to side box wall, and its end is provided with suspender suspention and applies weight counterweight 7；Monitoring device includes measurement
System, sensor-based system, signal acquiring system 8 and signal processing system 9；The active force of weight counterweight 7 is applied by lever 6 and/or is passed through
The steel wire rope 14 that lever 6 is provided with is acted in Model Pile 12.The conduct experiment auxiliary device of instrument laying rack 1 is used to place or consolidated
Fixed various laboratory apparatus.
A suspention bolt being connected with applying weight counterweight 7 is provided with the outside of the end of lever 6；In the inner side of lever 6, lever 6
Application point and the end of lever 6 be respectively equipped with a pulley 15, steel wire rope 14 is slidably connected by two pulleys 15 with lever 6.
1.5 meters of the length of experimental box body 16, it is wide 1.5 meters, it is high 1.8 meters, it is made up of tank tower, bottom plate and four sides side wall.Experimental box
The four sides side wall of body is made up of three face steel plate walls and a face safety glass wall, ensure that high intensity.
Safety glass wall is provided with movable window at three different positions, and these three movable windows can be opened freely；
Bottom plate is provided with Multi-function experimental hole 11, and Multi-function experimental hole 11 carries movable port lid.Simulated by safety glass wall observable
Position when pile body and soil deformation destroy, the convenient soil taken out in experiment at an arbitrary position of movable window, is advantageous to this
A little soil sample deployment analysis, with test simulation stake 12, when being pressurized, the piling to caused by surrounding soil influences.It is provided with the middle part of bottom plate
Multi-function experimental hole 11, by the opening and closing of the experimental port, can not only facilitate water level in control cabinet, while Model Pile is placed in
When directly over the top of hole, pure pile side friction experiment and pile side friction+end resistance can be deployed by opening and closing port lid
Experimental study, implementation model pile side resistance and collateral resistance add the piling experimental analysis of end resistance.
Monitoring device includes measuring system, sensor-based system, signal acquiring system 8 and signal processing system 9.Measuring system is led to
Cross sensor-based system with signal acquiring system 8 to be connected, signal acquiring system 8 is connected with signal processing system 9.
Measuring system includes settlement gauge, Load Meter and resistance to shear of soil measuring instrument.Settlement gauge is used to measure
The settling amount of pile body is simulated, including dial gauge 4 and laser range finder 2, laser range finder 2 can be measured beyond the range of dial gauge 4
Larger sedimentation.Dial gauge 4 and laser range finder 2 are preferably disposed on instrument laying rack 1, wherein, laser range finder 2 is arranged on
The lower section of instrument laying rack 1, rigid test board 5 are horizontally arranged at the upper end of Model Pile 12, and the laser probe of laser range finder 2 is just
Against rigid test board 5, two dial gauges 4 are symmetricly set on rigid test board 5.
Load Meter is preferably arranged on the axle power meter 3 of simulation stake top, for measuring the load suffered by simulation stake top in real time
Lotus.
Resistance to shear of soil measuring instrument is preferably the soil pressure being evenly distributed on according to certain altitude spacing around the simulation pile body soil body
Power box 10, for being measured to the ess-strain of the soil body.
Settlement gauge, Load Meter and resistance to shear of soil measuring instrument pass through sensor-based system and signal acquiring system 8 respectively
It is connected, sensor-based system and signal acquiring system 8 are dynamic/static strain testing system, can be in real time to suffered by simulation stake top
The ess-strain of load and the soil body is measured and recorded.
Signal processing system 9 is preferably computer terminal, is responsible for record, analyzes and handle every experimental data.
First, with reference to figure 1, during compression test：Loading device is formed by applying weight counterweight 7 and lever 6.One end of lever 6 passes through
Latch 13 is connected to model casing, and weight counterweight 7 is applied in the other end addition of lever 6, applies pressure to Model Pile 12 by lever principle.
During piling, when opening Multi-function experimental hole, Model Pile bottom does not have soil body support, when by lever loading, pile body and soil
Body only has collateral resistance as bearing capacity of pile, so, when carrying out the experimental study of model pile side friction, can improve experiment
Precision.
The load for being applied to simulation stake top can be flexibly controlled by the way that lever 6 and Shi Chong counterweights 7 are adjusted, can be fast
Speed carries out a variety of different loading tests, convenient and easy to operate.
2nd, with reference to figure 2, during pullout tests：Loading device includes lever 6, steel wire rope 14 and Shi Chong counterweights 7, and lever 6 is fixed
On model casing, Model Pile 12 is connect into the suspension ring for pulling out axle power meter connection by hook with being connected, then by tension and compression axle power meter 3 with crossing over
The steel wire rope 14 of pulley 15 connects, and the weight counterweight 7 of applying suspended in midair by steel wire rope 14 is applied with and stirs power.
Steel wire rope on pulley 15 is connected with axle power meter 3, and weight counterweight is applied in the addition of the afterbody of steel wire rope 14 using pulley principle
Uplift force is applied to Model Pile 12, can facilitate and pullout tests are carried out to simulation stake 12, Vertical loading be avoided, so as to eliminate
Heavy mechanical equipment and other manpower and materials.
Claims (7)
1. one kind pressure, pull out comprehensive laboratory experiment stake bath scaled model experimental device, including Model Pile（12）, experimental box body, loading device, prison
Survey device and experiment auxiliary device, it is characterised in that Model Pile（12）Positioned at the middle position of experimental box body, loading device includes
Lever（6）Counterweight is weighed with applying（7）, lever（6）One end swings and is connected on the side box wall of model casing one, lever（6）Application point position
In Model Pile（12）Top, lever（6）The other end is passed through to side box wall, and its end is provided with suspender suspention and applies weight counterweight（7）；
Monitoring device includes measuring system, sensor-based system, signal acquiring system（8）And signal processing system（9）；Apply weight counterweight（7）'s
Active force passes through lever（6）And/or pass through lever（6）The steel wire rope being provided with（14）Act on Model Pile（12）On；
Experimental box body is made up of tank tower, bottom plate and four sides side wall, and four sides side wall is provided with least three different positions and lived
Dynamic window；Multi-function experimental hole is provided with bottom plate（11）, Multi-function experimental hole（11）With movable port lid.
2. a kind of pressure according to claim 1, pull out comprehensive laboratory experiment stake bath scaled model experimental device, it is characterised in that：It is described
The four sides side wall of experimental box body is made up of three face steel plate walls and a face safety glass wall；There are three differences on safety glass is faced the wall and meditated
Position be provided with movable window.
3. a kind of pressure according to claim 1, pull out comprehensive laboratory experiment stake bath scaled model experimental device, it is characterised in that Shi Chong
Counterweight（7）Active force pass through lever（6）Act on Model Pile（12）Upper i.e. compression test, lever（6）End directly suspend in midair
Apply weight counterweight（7）, lever（6）Active force pass through tension and compression axle power meter（3）It is acting downwardly on Model Pile（12）Upper end, tension and compression axle
Power meter（3）It is arranged on lever（6）Application point below.
4. a kind of pressure according to claim 1, pull out comprehensive laboratory experiment stake bath scaled model experimental device, it is characterised in that Shi Chong
Counterweight（7）Active force pass through lever（6）The steel wire rope being provided with（14）Act on Model Pile（12）Upper i.e. pullout tests, steel wire
Rope（14）It is slidably arranged in lever（6）Application point and lever（6）Between end, steel wire rope（14）One end suspention apply weight counterweight
（7）, steel wire rope（14）Other end active force pass through tension and compression axle power meter（3）It is acting upwardly on Model Pile（12）Upper end, tension and compression
Axle power meter（3）It is arranged on lever（6）Application point below.
5. a kind of pressure according to claim 4, pull out comprehensive laboratory experiment stake bath scaled model experimental device, it is characterised in that in thick stick
Bar（6）Application point and lever（6）End is respectively equipped with a pulley, steel wire rope（14）It is slidably connected with the two pulleys, steel
Cord（14）Pass through tension and compression axle power meter（3）On suspension ring and Model Pile（12）On hook connection.
6. a kind of pressure according to claim 1, pull out comprehensive laboratory experiment stake bath scaled model experimental device, it is characterised in that measurement
System includes settlement gauge, Load Meter and resistance to shear of soil measuring instrument.
7. a kind of pressure according to claim 6, pull out comprehensive laboratory experiment stake bath scaled model experimental device, it is characterised in that sedimentation
Measuring instrument includes laser range finder（2）, dial gauge（4）With rigid test board（5）, rigid test board（5）It is horizontally arranged at model
Stake（12）Upper end, laser range finder（2）Laser probe face rigid test board（5）, two dial gauges（4）It is symmetrical arranged
In rigid test board（5）On；Load Meter is the tension and compression axle power meter for being arranged on simulation stake top（3）, tension and compression axle power meter（3）Set
In lever（6）Application point below；Resistance to shear of soil measuring instrument simulates the pile body soil body to be embedded in experimental box and being evenly distributed on
The soil pressure cell of surrounding（10）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610300450.1A CN105862937B (en) | 2016-05-09 | 2016-05-09 | One kind pressure, pull out comprehensive laboratory experiment stake bath scaled model experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610300450.1A CN105862937B (en) | 2016-05-09 | 2016-05-09 | One kind pressure, pull out comprehensive laboratory experiment stake bath scaled model experimental device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105862937A CN105862937A (en) | 2016-08-17 |
| CN105862937B true CN105862937B (en) | 2018-01-05 |
Family
ID=56631355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610300450.1A Expired - Fee Related CN105862937B (en) | 2016-05-09 | 2016-05-09 | One kind pressure, pull out comprehensive laboratory experiment stake bath scaled model experimental device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105862937B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351267A (en) * | 2016-10-11 | 2017-01-25 | 沈阳建筑大学 | Pile foundation bearing characteristic model testing device under down-pressing static load effect |
| CN106400856A (en) * | 2016-12-02 | 2017-02-15 | 广州建设工程质量安全检测中心有限公司 | Loading device and method for static load test of pile foundation |
| CN106644695A (en) * | 2017-01-05 | 2017-05-10 | 上海理工大学 | Device and method for testing carrying capacity of uplift piles at different temperatures |
| CN106759549A (en) * | 2017-01-09 | 2017-05-31 | 北京科技大学 | A kind of indoor analog simulation energy pile and its experimental monitoring system |
| CN107014670B (en) * | 2017-04-28 | 2023-10-17 | 浙江科技学院 | Testing device for multi-directional horizontal bearing capacity of single pile under composite load |
| CN107090859B (en) * | 2017-04-28 | 2019-04-23 | 浙江科技学院 | A kind of test method of the multidirectional horizontal bearing capacity of single pile under compound load action |
| CN110847249A (en) * | 2019-10-14 | 2020-02-28 | 东南大学 | Indoor model device for detecting uplift resistance and horizontal bearing performance of pile foundation |
| CN110847252B (en) * | 2019-11-19 | 2021-05-07 | 河南日盛综合检测有限公司 | Pile foundation resistance to plucking performance detection device |
| CN111089799A (en) * | 2019-12-20 | 2020-05-01 | 扬州大学 | Vertical loading test device and test method for indoor model pile |
| CN113482069B (en) * | 2021-07-26 | 2022-08-12 | 中国石油大学(北京) | Pile inserting and pulling experimental device for self-elevating drilling platform |
| CN113740095B (en) * | 2021-09-14 | 2024-04-09 | 中海石油(中国)有限公司湛江分公司 | Simulation experiment device and simulation experiment method for suction pile well construction |
| CN114045890A (en) * | 2021-11-24 | 2022-02-15 | 浙江大学 | Test device and method for measuring ultimate bearing capacity of composite anchorage of open caisson tubular pile |
| CN114541496B (en) * | 2022-04-22 | 2022-07-12 | 石家庄铁道大学 | Anti-pulling loading model test box |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1278113C (en) * | 2003-06-25 | 2006-10-04 | 胜利石油管理局钻井工艺研究院 | Pile-soil action indoor testing apparatus |
| KR20120114706A (en) * | 2011-04-08 | 2012-10-17 | 목포대학교산학협력단 | Load test apparatus |
| KR101383234B1 (en) * | 2012-11-19 | 2014-04-10 | 한국건설기술연구원 | Apparatus for repeatedly horizontal load of pile and test method for horizontal load support force of pile using the same |
| CN203066126U (en) * | 2012-12-31 | 2013-07-17 | 同济大学 | Test device for simulating vertical tension-compression load effect on pile foundations |
| CN105155593A (en) * | 2015-07-05 | 2015-12-16 | 华东交通大学 | Deformation-visible pile foundation model test loading box |
| CN205576989U (en) * | 2016-05-09 | 2016-09-14 | 东华理工大学 | Comprehensive laboratory experiment stake model experiment device is pressed, pulled out |
-
2016
- 2016-05-09 CN CN201610300450.1A patent/CN105862937B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN105862937A (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105862937B (en) | One kind pressure, pull out comprehensive laboratory experiment stake bath scaled model experimental device | |
| CN205576989U (en) | Comprehensive laboratory experiment stake model experiment device is pressed, pulled out | |
| US10816448B2 (en) | Device for measuring strength and strain softening parameters of saturated clay sample based on full-flow penetration | |
| CN108918819B (en) | Multi-parameter micro test device for simulating dry-wet cycle and use method thereof | |
| CN205224129U (en) | Single pile basis vertical bearing capacity's experiment detection device | |
| CN103234830B (en) | Anchoring property experiment platform of anchor rod | |
| CN110208114B (en) | Interface vibration single shear test device and method for simulating power contact problem | |
| CN102914475B (en) | Shear test device for observing mechanical property of interface between underwater soil and structure | |
| CN104142388B (en) | Original position static(al) press-in test method in boring | |
| CN202433147U (en) | Portable dynamic force calibrating device | |
| CN204590104U (en) | A kind of bath scaled model experimental device of simulating self-balance testing pile method | |
| CN106680085B (en) | Test macro and test method based on creep testing machine anchoring-bolt system Aging Characteristic | |
| CN208888043U (en) | A kind of saturation clay probe intensity and strain softening parameter measuring apparatus based on full stream feeler inspection | |
| CN109211549A (en) | A kind of outer air bag load testing machine of structural elements plane | |
| CN110629812A (en) | Loading test device and method for vertical dynamic and static loads of single pile | |
| Doroudian et al. | Small-strain testing in an NGI-type direct simple shear device | |
| CN201935794U (en) | Deflection detector | |
| CN109900406A (en) | Expand soil layer negative friction conversion coefficient measuring device, design method and measurement method | |
| CN106442183B (en) | Concrete component crack propagation loading device under a kind of reciprocating load | |
| CN204269475U (en) | Tensile Strength of Frozen Soil proving installation | |
| CN208350200U (en) | A kind of experimental rig and system measuring coarse-grained soil shear wave velocity | |
| CN104697855A (en) | Device and method for measuring fiber drawing creep | |
| CN211401995U (en) | Low-energy-consumption automatic hard rock impact device with combination of moving pulleys and fixed pulleys | |
| CN109487835A (en) | The detection method and detection device of pile foundation allowable bearing | |
| CN105758559B (en) | A kind of shear stress test device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180105 Termination date: 20180509 |