CN107478811B - Test device and method for simulating underground engineering large-deformation buffer layer supporting mechanism - Google Patents
Test device and method for simulating underground engineering large-deformation buffer layer supporting mechanism Download PDFInfo
- Publication number
- CN107478811B CN107478811B CN201710485066.8A CN201710485066A CN107478811B CN 107478811 B CN107478811 B CN 107478811B CN 201710485066 A CN201710485066 A CN 201710485066A CN 107478811 B CN107478811 B CN 107478811B
- Authority
- CN
- China
- Prior art keywords
- test piece
- shell
- test
- buffer layer
- flexible sleeve
- 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.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 124
- 230000007246 mechanism Effects 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title abstract description 11
- 239000011381 foam concrete Substances 0.000 claims abstract description 34
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 210000004907 gland Anatomy 0.000 claims description 10
- 238000010998 test method Methods 0.000 claims description 5
- 238000004088 simulation Methods 0.000 claims description 4
- 239000011435 rock Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 7
- 238000007789 sealing Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003204 osmotic effect Effects 0.000 description 3
- 239000012466 permeate Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a test device and a method for simulating a supporting mechanism of a large deformation buffer layer of underground engineering, wherein the test device comprises: a housing having a cylindrical rigid structure; the flexible sleeve body is arranged on the inner side of the shell, and the inner side of the flexible sleeve body is used for clinging to the surface of the foam concrete test piece; the two pressing covers are used for fixing the flexible sleeve body at the upper end and the lower end of the shell and ensuring that a closed space is formed between the flexible sleeve body and the inner wall of the shell; the shell is provided with a confining pressure applying hole for filling a hydraulic medium into the closed space; the hydraulic medium filled in the pressurizing device is used for applying pressure to the test piece to cause the deformation of the surface of the test piece, so that the large deformation of the foam concrete is simulated, the test piece is made into a cylindrical test piece with a set thickness, and a rigid body matched with the inner surface of the test piece is arranged at the hollow position of the test piece to simulate a rigid supporting structure.
Description
Technical Field
The invention belongs to the technical field of underground engineering test instruments, and particularly relates to a test device and a method for simulating a large-deformation buffer layer support mechanism of underground engineering.
Background
The underground engineering tunnel (roadway) often touches soft rock large-deformation surrounding rocks, the deformation speed of the surrounding rocks in the excavation process can reach more than 100mm/d, the surrounding rocks deform seriously during the service period, the deformation is few hundreds of millimeters and up to 1000-plus 2000mm, and the construction safety and the normal operation of the underground engineering are seriously threatened. Therefore, how to solve the problem of supporting the tunnel (roadway) is one of the most complicated engineering technical problems in the underground engineering in the world today. The foam concrete has the characteristics of light weight, low elasticity, strong deformability and the like because the foam concrete is filled with a plurality of independently closed pores, so that the foam concrete is used as a buffering energy-absorbing material to be applied to large-deformation support of tunnels (roadways): the method is characterized in that foam concrete is filled between a primary lining and a secondary lining of the tunnel, and the purposes of absorbing deformation energy of surrounding rocks and reducing stress of the secondary lining are achieved by utilizing the large deformation characteristic of the foam concrete.
However, the existing test devices are all used for testing common test pieces, and the action mechanism of the foam concrete buffer layer on the stress reduction of the secondary lining in the process of large deformation of surrounding rocks cannot be simulated.
Disclosure of Invention
In view of the above-mentioned defects or shortcomings in the prior art, it is desirable to provide a testing apparatus and method for a large-deformation buffer layer supporting mechanism of an underground engineering, to solve the problem of the control effect of the reasonable buffer layer strength and thickness of the large-deformation engineering on the large deformation, and to provide a corresponding design method.
The test device of the big deformation buffer layer support mechanism of simulation underground works includes:
a housing having a cylindrical rigid structure;
the flexible sleeve body is arranged on the inner side of the shell, and the inner side of the flexible sleeve body is used for clinging to the surface of the foam concrete test piece;
the two pressing covers are used for fixing the flexible sleeve body at the upper end and the lower end of the shell and ensuring that a closed space is formed between the flexible sleeve body and the inner wall of the shell;
the shell is provided with a confining pressure applying hole for filling a hydraulic medium into the closed space;
the hydraulic medium filled in the pressurizing device is used for applying pressure to the test piece to cause the deformation of the surface of the test piece, so that the large deformation of the foam concrete is simulated, the test piece is made into a cylindrical test piece with a set thickness, and a rigid body matched with the inner surface of the test piece is arranged at the hollow position of the test piece to simulate a rigid supporting structure.
The flexible sleeve body is a rubber sleeve, so that the cost is low and the material is convenient to obtain.
Flanges are arranged at two ends of the flexible sleeve body, and the gland presses the flanges through the cover to ensure the tightness of the closed space. The sealing mode is simple and easy to manufacture.
The outer circle of the flange of the flexible sleeve body is provided with a bending part which is tightly attached to the outer surface of the shell, so that the sealing performance of the closed space can be further improved.
The gland is a flange ring, the flange ring is fixedly connected with the shell in a detachable mode through a threaded piece longitudinally arranged, and the test operation is simple and convenient.
In order to further enhance the sealing performance of the closed space, two end faces of the shell are provided with annular grooves on the inner sides of the threaded parts, and O-shaped gaskets with the height slightly larger than that of the grooves are arranged in the grooves. When the gland is compressed, the O-shaped gasket is in a compressed state, and leakage of a hydraulic medium from the end part can be effectively avoided.
The confining pressure applying hole is arranged at the middle position of the shell along the longitudinal direction, and the pressurizing effect is better when pressure is applied through the hydraulic medium.
The test method for simulating the support mechanism of the large deformation buffer layer of the underground engineering comprises the following steps:
placing a foam concrete test piece in a shell for accommodating the test piece device, wherein a flexible sleeve body which is used for clinging to the surface of the test piece is arranged on the inner side of the shell, a closed space is formed between the flexible sleeve body and the inner wall of the shell, and a confining pressure applying hole for filling a hydraulic medium in the closed space is formed in the shell;
the hydraulic medium filled in the pressurizing device is used for applying pressure to the test piece to cause the deformation of the surface of the test piece, so that the large deformation of the foam concrete is simulated, the test piece is made into a cylindrical test piece with a set thickness, and a rigid body matched with the inner surface of the test piece is arranged at the hollow position of the test piece to simulate a rigid supporting structure.
The set thickness of the test piece was 5-10 cm. The mechanism of reducing the stress of the secondary lining by the foam concrete buffer layer can be effectively simulated when the surrounding rock is greatly deformed.
The outer surface of the rigid supporting concrete is cylindrical, the diameter of the rigid supporting concrete is 10-15cm, and the effect of truly simulating a two-lining rigid supporting structure can be achieved.
For example, in the background art, the existing test devices are all used for testing common test pieces, and the action mechanism of the foam concrete buffer layer on the stress reduction of the secondary lining in the process of large deformation of surrounding rocks cannot be simulated.
For the technical problems, solutions are actively sought in the industry at present, but because the boundary of a test specimen is generally not constrained or is rigidly constrained, a force application material and a force application method which can simulate large deformation of foam concrete caused by surrounding rock deformation cannot be found, so that the test in the prior art cannot measure the mechanical parameters of the foam concrete after the large deformation.
In the traditional test, the simulation deformation is directly simulated by pressing a hard material. According to the technical scheme provided by the embodiment of the application, the test piece is designed into a cylindrical test piece, the flexible sleeve body arranged in the shell is used for applying pressure to the test piece through a liquid medium, and the rigid supporting structure is simulated through the rigid body arranged at the center of the test piece. Because the shell is of a rigid structure, the shell can provide enough counter-force support for the flexible sleeve body, and when the pressure applied by the hydraulic medium reaches a large enough load value, the outer side of the foam concrete buffer layer deforms; because the center of the test piece is provided with the rigid body simulating the secondary lining to prevent the deformation of the inner side of the test piece, when the pressure continues to increase continuously, the foam concrete can continue to deform, thereby generating the test effect of simulating the large deformation of the surrounding rock. By embedding test elements in the test piece, for example: strain gauge, etc. to obtain the corresponding mechanical parameters of the rigid support structure after the great deformation of the surrounding rock.
The shell is the cylinder, and the steel column that is used for simulating two linings that cooperation test piece hollow position department set up for the thickness of test piece is unanimous, and the condition of the big deformation of simulation country rock that can be better makes the experimental parameter who obtains more accurate.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a perspective view of the test device of the present application;
FIG. 2 is a longitudinal cross-sectional view of the test device of the present application;
FIG. 3 is an enlarged view of the structure of part A of the present application;
FIG. 4 is a schematic diagram of the construction of a seepage rheometer;
wherein:
1. the device comprises a kettle body, a rubber sleeve, a flange, a gland, a closed space, a bent part, a threaded part, an annular groove, a ring-shaped gasket, a ring-shaped groove, a ring-shaped gasket, a ring-shaped groove;
21. the tester comprises a tester frame 22, a tester three-shaft cylinder 23, a permeation water inlet pipe 24, a permeation water outlet pipe 25, a confining pressure control system 26, a permeation pressure control system 27 and a confining pressure oil delivery pipe.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1-3, a test apparatus for simulating a supporting mechanism of a large deformation buffer layer in an underground engineering, in particular, a test apparatus for accommodating a test piece, which can simulate large deformation of foam concrete.
The test device comprises: the cylindrical kettle body 1 structure is equivalent to a rigid shell; the inner side of the kettle body 1 is provided with a flexible sleeve body, specifically a rubber sleeve 2, and the inner side of the rubber sleeve 2 is used for clinging to the surface of the foam concrete test piece 11.
The both ends of gum cover 2 are equipped with flange 3, are equipped with two glands 4 that are used for fixed gum cover 2 flange 3 at the upper end of the cauldron body 1 and lower extreme, and gland 4 is through lid pressure flange 3 in order to guarantee to be airtight space 5 between gum cover 2 and the cauldron body 1 inner wall.
Preferably, a bent portion 6 closely attached to the outer surface of the housing is formed around the outside of the flexible sleeve flange 3, so that the sealing property of the sealed space 5 can be further improved.
Specifically, gland 4 is the flange ring, and the flange ring is through along the screw 7 and the casing detachable fixed connection of vertical setting, and experimental easy operation is convenient.
In order to further enhance the sealing performance of the closed space 5, two end faces of the shell are provided with annular grooves 8 on the inner sides of the screw members 7, and O-shaped gaskets 9 with the height slightly larger than that of the grooves are arranged in the grooves. When the gland 4 is compressed, the O-shaped gasket 9 is in a compressed state, and leakage of the hydraulic medium from the end part can be effectively avoided.
A confining pressure applying hole 10 is arranged on the kettle body 1 and used for filling a hydraulic medium into the closed space 5;
the hydraulic medium filled in the pressurizing device is used for applying pressure to the test piece 11 to cause the deformation of the surface of the test piece, so that the large deformation of the foam concrete is simulated, the test piece is made into a cylindrical test piece with a set thickness, and a rigid body matched with the inner surface of the test piece is arranged at the hollow position of the test piece to simulate a rigid supporting structure. Specifically, the rigid body is a steel column 12.
The confining pressure applying hole 10 is provided at an intermediate position of the housing in the longitudinal direction, and the pressurizing effect is better when the pressure is applied by the hydraulic medium.
The test method for simulating the support mechanism of the large deformation buffer layer of the underground engineering comprises the following steps:
placing a foam concrete test piece in a kettle body 1 of a test piece accommodating device, wherein a rubber sleeve 2 used for being tightly attached to the surface of the test piece is arranged on the inner side of the kettle body 1, a closed space 5 is formed between the rubber sleeve 2 and the inner wall of the kettle body 1, and a confining pressure applying hole 10 for filling a hydraulic medium into the closed space 5 is formed in the kettle body 1;
the hydraulic medium filled in the pressurizing device is used for applying pressure to the test piece to cause the deformation of the surface of the test piece, so that the large deformation of the foam concrete is simulated, the test piece is made into a cylindrical test piece with a set thickness, and a rigid body matched with the inner surface of the test piece is arranged at the hollow position of the test piece to simulate a rigid supporting structure.
Wherein the set thickness of the test piece is 5-10 cm. The deformation of the foam concrete buffer layer can be effectively simulated. The outer diameter of the rigid body is 10-15cm, and the effect of truly simulating a two-lining rigid supporting structure can be achieved.
On the basis, conventional tests such as a shear test and the like are applied to the test piece, and then the corresponding mechanical parameters of the foam concrete after large deformation can be obtained.
For example, the rheological parameters of the foam concrete after the large deformation can be obtained by performing a large deformation test on the foam concrete sample and a seepage test after the large deformation of the foam concrete sample by using the rock seepage test device shown in fig. 4.
The rock seepage testing device comprises a testing machine frame 21, wherein a testing machine triaxial cylinder 22 and a pressure head system are installed in the testing machine frame 21, a foam concrete test piece 11 is installed in a sample device for simulating large deformation of foam concrete, and the testing device is arranged between an upper pressure head and a lower pressure head. The confining pressure applying hole of the test device is connected with a confining pressure control system 25 through a confining pressure oil conveying pipe 27. A permeate inlet pipe 23 and a permeate outlet pipe 24 are provided above and below the test piece, respectively, and both are connected to a permeate pressure control system 26. In order to ensure the effect of the penetration test, a rubber sleeve is arranged outside the steel column 12, so that the tightness between the steel column 12 and the hollow inner wall of the test piece is ensured.
In the test, first, confining pressure is applied to the test piece 11 by the confining pressure control system 25, and the test piece 11 is largely deformed. When the pressure borne by the test piece 11 is similar to the confining pressure borne by a construction site, the test piece 11 is greatly deformed. And then, applying osmotic pressure to the test piece 11 after the large deformation through an osmotic pressure control system, and testing the osmotic parameters of the test piece 11 after the large deformation.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. Test device of big deformation buffer layer support mechanism of simulation underground works, its characterized in that includes:
a housing having a cylindrical rigid structure;
the flexible sleeve body is arranged on the inner side of the shell, and the inner side of the flexible sleeve body is used for clinging to the surface of the foam concrete test piece;
the two pressing covers are used for fixing the flexible sleeve body at the upper end and the lower end of the shell and ensuring that a closed space is formed between the flexible sleeve body and the inner wall of the shell;
the shell is provided with a confining pressure applying hole for filling a hydraulic medium into the closed space;
the hydraulic medium filled in the pressurizing device is used for applying pressure to the test piece to cause the deformation of the surface of the test piece, so that the large deformation of the foam concrete is simulated, the test piece is made into a cylindrical test piece with a set thickness, and a rigid body matched with the inner surface of the test piece is arranged at the hollow position of the test piece to simulate a rigid supporting structure.
2. The test device for simulating the supporting mechanism of the large deformation buffer layer of the underground engineering according to claim 1, wherein the flexible sleeve body is a rubber sleeve.
3. The test device for simulating the supporting mechanism of the large deformation buffer layer of the underground engineering according to claim 1, wherein flanges are arranged at two ends of the flexible sleeve body, and the gland covers the flanges to ensure the tightness of the closed space.
4. The test device for simulating the supporting mechanism of the large-deformation buffer layer of the underground engineering according to claim 3, wherein a bent part tightly attached to the outer surface of the shell is arranged on one circle of the outer side of the flange of the flexible sleeve body.
5. The test device for simulating the supporting mechanism of the large deformation buffer layer of the underground engineering according to any one of claims 1 to 4, wherein the gland is a flange ring, and the flange ring is detachably and fixedly connected with the shell through a threaded piece arranged along the longitudinal direction.
6. The test device for simulating the supporting mechanism of the large deformation buffer layer of the underground engineering according to claim 5, wherein the two end faces of the shell are provided with annular grooves on the inner sides of the threaded pieces, and O-shaped gaskets with the height slightly larger than that of the grooves are arranged in the grooves.
7. The test device for simulating the supporting mechanism of the large deformation buffer layer of the underground engineering according to any one of claims 1 to 4, wherein the confining pressure applying hole is arranged at the middle position of the shell along the longitudinal direction.
8. The test method for simulating the support mechanism of the large deformation buffer layer of the underground engineering is characterized by comprising the following steps of:
placing a foam concrete test piece in a shell for accommodating the test piece device, wherein a flexible sleeve body which is used for clinging to the surface of the test piece is arranged on the inner side of the shell, a closed space is formed between the flexible sleeve body and the inner wall of the shell, and a confining pressure applying hole for filling a hydraulic medium into the closed space is formed in the shell;
the hydraulic medium filled in the pressurizing device is used for applying pressure to the test piece to cause the deformation of the surface of the test piece, so that the large deformation of the foam concrete is simulated, the test piece is made into a cylindrical test piece with a set thickness, and a rigid body matched with the inner surface of the test piece is arranged at the hollow position of the test piece to simulate a rigid supporting structure.
9. The test method for simulating the supporting mechanism of the large deformation buffer layer of the underground engineering according to claim 8, wherein the set thickness of the test piece is 5-10 cm.
10. The test method for simulating the supporting mechanism of the large deformation buffer layer of the underground engineering according to claim 8, wherein the outer surface of the rigid body is cylindrical, and the diameter of the cylindrical shape is 10-15 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710485066.8A CN107478811B (en) | 2017-06-23 | 2017-06-23 | Test device and method for simulating underground engineering large-deformation buffer layer supporting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710485066.8A CN107478811B (en) | 2017-06-23 | 2017-06-23 | Test device and method for simulating underground engineering large-deformation buffer layer supporting mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107478811A CN107478811A (en) | 2017-12-15 |
| CN107478811B true CN107478811B (en) | 2020-09-25 |
Family
ID=60593623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710485066.8A Active CN107478811B (en) | 2017-06-23 | 2017-06-23 | Test device and method for simulating underground engineering large-deformation buffer layer supporting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107478811B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112647970B (en) * | 2020-12-28 | 2022-04-26 | 中国科学院武汉岩土力学研究所 | Polyurethane large-deformation numerical simulation method for tunnel buffer support |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7089816B2 (en) * | 2004-01-13 | 2006-08-15 | Halliburton Energy Services, Inc. | Method and apparatus for testing cement slurries |
| CN102636565B (en) * | 2011-11-23 | 2014-03-26 | 河海大学 | Method for testing variation of early-age dynamic elastic modulus of concrete in time-dependent manner |
| CN102494950A (en) * | 2011-11-24 | 2012-06-13 | 长安大学 | Method for testing dynamic modulus of asphalt concrete and device thereof |
| CN102621005B (en) * | 2012-03-30 | 2014-04-02 | 中国矿业大学(北京) | Rock soil rheological test equipment |
| CN202793989U (en) * | 2012-09-23 | 2013-03-13 | 西安科技大学 | Light constant head permeameter for porous concrete |
| CN103512806B (en) * | 2013-09-18 | 2016-06-29 | 华侨大学 | A kind of novel test method of concrete circular barrel shell security performance |
| CN105445095A (en) * | 2016-01-11 | 2016-03-30 | 中国人民解放军理工大学 | Bearing frame for simulating stress state of deep rock mass |
| CN105937399A (en) * | 2016-05-31 | 2016-09-14 | 中国科学院武汉岩土力学研究所 | Coordination deformation support system suitable for soft-rock large-deformation tunnel, and support method of support system |
| CN106153469A (en) * | 2016-08-22 | 2016-11-23 | 中国科学院武汉岩土力学研究所 | Isolated Triaxial tester |
-
2017
- 2017-06-23 CN CN201710485066.8A patent/CN107478811B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107478811A (en) | 2017-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ding et al. | Development and application of the integrated sealant test apparatus for sealing gaskets in tunnel segmental joints | |
| CN105181253B (en) | The duct piece specimen and its manufacture method tested for Longitudinal Joint between Segments anti-permeability performance | |
| CN103076230B (en) | Test method and test device of mechanical properties of soil-structure contact surface | |
| CN106638725B (en) | A kind of pile pile soil compaction effect test device and method | |
| US4614110A (en) | Device for testing the load-bearing capacity of concrete-filled earthen shafts | |
| CN109374409B (en) | Method for rapidly measuring ground stress on site | |
| CN102564702B (en) | Device and system for testing packer in formation tester | |
| CN103512806B (en) | A kind of novel test method of concrete circular barrel shell security performance | |
| CN106885661A (en) | The shield tunnel pipe ring anti-permeability performance test method of simulation water, native load action | |
| CN103760028B (en) | The confined pressure charger of use for laboratory rock testing | |
| CN107121245A (en) | Shield tunnel lining segment two seals pad waterproof ability test device and method | |
| CN205175831U (en) | Rock triaxial rheology experimental apparatus based on true water environment | |
| CN107515289B (en) | Coal and gas outburst simulation test device | |
| CN107121342B (en) | Internal water pressure loading device for water delivery tunnel structure model test | |
| CN105699211B (en) | A kind of test method of rock seepage-pipe coupling model shear rheology test | |
| CN110864971A (en) | Flexible pressurization test device and method for applying surrounding rock pressure in drawing test | |
| CN107478811B (en) | Test device and method for simulating underground engineering large-deformation buffer layer supporting mechanism | |
| CN105717020B (en) | A kind of rock seepage-pipe coupling model shear rheology test box | |
| CN107313472B (en) | Device and method for testing bearing capacity of pile end of prestressed pipe pile | |
| Xiao et al. | Compression-shear behavior of a scaled immersion joint with steel shear keys | |
| CN110006742A (en) | A kind of triaxial test pressure chamber of analog underground chamber and tunnel excavation off-load and supporting | |
| CN106959270A (en) | Cement the well an interface cementing strength curing means, test device and method of testing | |
| CA3048262C (en) | Measurement cell and associated measurement method | |
| CN205192836U (en) | Consider geotechnological triaxial apparatus compression test pressure chamber of soil body off -load | |
| CN218937995U (en) | Novel lateral limit compression test device for simulating true stress state of soil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |