CN203502298U - Simple model testing device for deeply buried tunnel - Google Patents
Simple model testing device for deeply buried tunnel Download PDFInfo
- Publication number
- CN203502298U CN203502298U CN201320577485.1U CN201320577485U CN203502298U CN 203502298 U CN203502298 U CN 203502298U CN 201320577485 U CN201320577485 U CN 201320577485U CN 203502298 U CN203502298 U CN 203502298U
- Authority
- CN
- China
- Prior art keywords
- shaped groove
- test piece
- contact
- test
- stress
- 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 - Lifetime
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 72
- 239000010720 hydraulic oil Substances 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 24
- 230000006378 damage Effects 0.000 abstract description 7
- 238000011160 research Methods 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 2
- 230000009897 systematic effect Effects 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a simple model testing device for a deeply buried tunnel. The device is characterized by comprising a V-shaped groove, a side baffle plate, a loading cushion block, a hydraulic bag and a similarly-trapezoidal test piece. According to the device, the plane stress state of surrounding rocks on a project site can be simulated for systematic researches on the properties of stress, deformation, damage and the like after deep surrounding rocks are excavated; a part of the surrounding rocks of the deeply buried tunnel are taken for analysis, and an arc-shaped stress boundary condition is directly created through the special hydraulic bag, so that compared with a conventional full-face model testing device, the device has the advantage that an ultralarge-scale model test can be carried out; sufficient mechanical theory bases are provided, the combination of the test and the theory is facilitated, and the development of an engineering theory is promoted; the device can be loaded to a conventional pressure tester, and has the characteristics of simple structure and low test cost.
Description
Technical Field
The utility model belongs to the technical field of the laboratory simulation experiment that deep underground works country rock warp and destroy and specifically relates to a novel simple and easy model test device to bury the tunnel deeply.
Background
With the rapid development of national economy, underground engineering construction is continuously developing towards deep parts. Under deep conditions such as high ground stress, the mechanical characteristics and engineering response of the underground chamber surrounding rock structure show new scientific phenomena and change rules, such as zone fracture, large deformation, impact damage and the like. The traditional underground engineering theoretical system meets more and more challenges in solving the deep underground engineering problem, and a new system for establishing a deep rock mass mechanics theory is imperative. Therefore, the deep underground engineering problem has attracted great attention of experts in the fields of rock mechanics and engineering internationally and domestically, and becomes a hot problem for research in the field in recent years.
Aiming at the mechanical response and deformation characteristics of a rock mass in the process of excavating a deep underground cavern, on one hand, theoretical research needs to be carried out, and on the other hand, more model test research combining engineering practice and theory needs to be carried out deeply. According to the requirements of deep cavern model tests, experts at home and abroad develop various high ground stress loading model test systems, including patents 200810016641.0, 200810138981.0, 201110038876.1 and the like. However, the existing model test systems are all full-section simulation systems, and have the problems of complex structure, large volume and small simulation chamber size, so that the model test of the chamber with a large scale is difficult to develop, and the effective theoretical comparison and analysis of the test result are difficult to perform.
Disclosure of Invention
The utility model aims at overcoming the not enough of above-mentioned prior art, provide a simple and easy model test device of tunnel deeply buried that simple structure and can carry out large scale model test.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a simple model test device for a deep-buried tunnel comprises a V-shaped groove, a side baffle, a loading cushion block, a hydraulic bag and a trapezoid-like test piece;
the V-shaped groove is of an integral structure and comprises a bottom plate and two side walls, the side walls comprise an inclined part and a vertical part, the inner surface of the inclined part is matched with the two inclined surfaces of the trapezoid-like test piece, and the lower surface of the bottom plate is in contact with a loading device of a testing machine and bears the pressure of the testing machine;
the side baffles are fixed on the front side and the rear side of the V-shaped groove, the external outline of the side baffles is matched with the outer edge of the V-shaped groove, and the internal surface of the side baffles is in contact with the front surface and the rear surface of the trapezoid-like test piece, so that the side baffles have the functions of preventing the trapezoid-like test piece from axially deforming to meet the requirement of a plane strain state and preventing the side wall of the V-shaped groove from deforming towards two; the vent hole is arranged at the center of the bottom side of the side baffle plate, so that the air pressure in the reserved deformation space is prevented from rising due to the deformation of the trapezoid-like test piece during loading; the side baffle is made of steel, and can be made of high-strength transparent material completely or partially, so that the deformation and damage conditions of the test piece can be observed and recorded at any time in the experimental process;
the loading cushion block is divided into an upper part and a lower part, four side surfaces of the lower part are in close contact with the V-shaped groove and the inner surfaces of the side baffles, and the lower surface of the lower part is in contact with the hydraulic bag; the upper half part is cylindrical, and the upper surface of the upper half part is contacted with a loading device of a testing machine and bears the pressure of the testing machine;
the hydraulic bag is of a hollow structure, the interior of the hydraulic bag is filled with hydraulic oil, the hydraulic bag has the function of converting the plane force of the loading cushion block into the arc force, and the hydraulic bag is a flexible member and can extrude the trapezoid-like test piece under the pressure action of the loading cushion block and generate certain deformation;
the trapezoidal test piece of class, the upper and lower surface is coaxial circular arc face, and the extension line of controlling the side passes through the axis of above-mentioned circular arc face, and side perpendicular to horizontal plane around, the side contacts with the inclined part internal surface of V type groove lateral wall about, side and side shield internal surface contact around, four sides all scribble lubricating material to reduce the shear stress that it received, reserve the deformation space between lower surface and the V type groove bottom plate internal surface.
The principle of the utility model is that:
a large part of the current constructed deep-buried underground tunnel adopts a circular or similar circular section; due to creep deformation under high stress conditions, the stress state of the original rock of the deeply buried rock mass is mostly close to the hydrostatic pressure state; meanwhile, for a high-stress rock body, the influence of local gravity is negligible. According to the three reasons, the problems of stress, deformation and damage of the surrounding rock of the deep-buried tunnel can be considered as the axial symmetry problem. To the axial symmetry problem, can take its part (promptly the type trapezoidal test piece of the utility model) to test and can reflect the holistic nature of country rock.
For the axial symmetry problem, under the condition of plane strain, the stress and displacement of the surrounding rock are solved as shown in formulas (1) and (2),
， ， 
；（1）
wherein,
in order to be a radial stress,
is tangential stress of
Andin order to achieve the shear stress,
in order to be displaced in the radial direction,
in the form of a tangential displacement, the displacement is,
the stress of the original rock is taken as the stress of the original rock,
is the tunnel radius. According to a formula, the surrounding rock is only subjected to radial stress and tangential stress and is not subjected to shear stress; only radial displacement is produced and no tangential displacement is produced.
The utility model limits the tangential deformation of the test piece through the V-shaped groove, the test piece is forced to generate radial deformation through the loading cushion block and the hydraulic bag, and the side baffle limits the axial deformation of the test piece, thus meeting the displacement boundary condition of the plane strain axial symmetry problem; as only radial stress can be approximately considered between the hydraulic bag and the upper surface of the test piece, and only tangential stress can be approximately considered between the test piece and the V-shaped groove (under the action of the lubricating material, the shear stress between the hydraulic bag and the V-shaped groove can be ignored), the stress boundary condition of the axial symmetry problem is met. To sum up, the utility model discloses the plane of country rock at the engineering scene stress state that meets an emergency has been simulated completely.
The utility model can be used for systematically researching the properties of stress, deformation, damage and the like of deep surrounding rock in a plane strain state; because the utility model discloses get the partly analysis of deep-buried tunnel country rock, and directly exert the arc stress boundary condition through the hydraulic bag, therefore relative to current full-section model test device, can carry out the model test of super large scale; the utility model is researched aiming at the circular tunnel under ideal conditions, and the obtained test result can be compared, analyzed and verified conveniently with the existing theoretical achievement; the utility model discloses can load on conventional pressure experiment machine, have simple structure, characteristics that experimental cost is low.
Drawings
The present invention will be further explained with reference to the following detailed description and accompanying drawings:
FIG. 1 is a mechanical diagram of the present invention;
fig. 2 is a schematic view of the main structure of the present invention.
Detailed Description
With reference to fig. 1, the principle of the present invention is: the problems of stress, deformation and damage of the surrounding rock of the deeply buried tunnel can be considered as axial symmetry; for the axial symmetry problem, a part of the test sample (namely the trapezoid-like test sample 5 shown in fig. 1) can be used for testing, and the overall property of the surrounding rock can be reflected; according to mechanical analysis, the surrounding rock is only subjected to radial stress and tangential stress, and is not subjected to the sum of shear stress; only radial displacement is produced and no tangential displacement is produced.
With reference to the attached drawing 2, the simple model test device for the deeply buried tunnel comprises a V-shaped groove 1, a side baffle, a loading cushion block 3, a hydraulic bag 4 and a trapezoid-like test piece 5.
The V-shaped groove 1 is of an integral structure and comprises a bottom plate and two side walls, the side walls comprise an inclined part and a vertical part, the inner surface of the inclined part is matched with two inclined planes of the trapezoid-like test piece, and the lower surface of the bottom plate is in contact with a loading device of a testing machine and bears the pressure of the testing machine.
The side baffles are fixed on the front side and the rear side of the V-shaped groove 1, the outer contour of the side baffles is matched with the outer edge of the V-shaped groove 1, the inner surface of the side baffles is in contact with the front surface and the rear surface of the trapezoid-like test piece 5, the side baffles are used for preventing the trapezoid-like test piece 5 from axially deforming to meet the requirement of a plane strain state, and meanwhile, the side walls of the V-shaped groove 1 are prevented from deforming.
The loading cushion block 3 is divided into an upper part and a lower part, four side surfaces of the lower part are in close contact with the V-shaped groove 1 and the inner surfaces of the side baffles, and the lower surface is in contact with the hydraulic bag 4; the upper half part is cylindrical, and the upper surface of the upper half part is contacted with a loading device of the testing machine and bears the pressure of the testing machine.
The hydraulic bag 4 is filled with hydraulic oil, the hydraulic bag has the function of converting the plane force of the loading cushion block into the arc force, and the hydraulic bag is a flexible member, so that the trapezoid-like test piece 5 can be extruded under the pressure action of the loading cushion block and is deformed to a certain extent.
The similar trapezoidal test piece 5, the upper and lower surface is coaxial circular arc face, the extension line of controlling the side passes through the axis of above-mentioned circular arc face, the side perpendicular to horizontal plane around, the side contacts with the slope part of V type groove 1 lateral wall about, the side contacts with the side shield around, four sides all scribble lubricating material to reduce the shear stress that it received, reserve deformation space 6 between lower surface and the V type groove 1 bottom plate internal surface.
In order to prevent the type of trapezoidal test piece when the loading warp and arouse the atmospheric pressure in reservation deformation space and rise, the utility model discloses a preferred scheme is that the department sets up an air vent in side shield bottom side central point.
Side shield, the preparation material can also be whole or the part chooses for use high strength transparent material except chooseing for use steel to observe the deformation destruction condition of record test piece at any time in the experimentation.
The utility model limits the tangential deformation of the test piece through the side wall of the V-shaped groove 1, the radial deformation of the test piece is promoted through the loading cushion block 3 and the hydraulic bag 4, the axial deformation of the test piece is limited by the side baffle, and thus the displacement boundary condition of the plane strain axial symmetry problem is satisfied; as only radial stress can be approximately considered between the hydraulic bag 4 and the upper surface of the test piece, and only tangential stress can be approximately considered between the test piece and the V-shaped groove 1 (under the action of the lubricating material, the shear stress between the test piece and the V-shaped groove can be ignored), the stress boundary condition of the axial symmetry problem is met. To sum up, the utility model discloses the plane of country rock at the engineering scene stress state that meets an emergency has been simulated completely.
The above-mentioned embodiments are only one of the preferred embodiments of the present invention, and the general changes and substitutions performed by those skilled in the art within the technical scope of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. The utility model provides a simple and easy model test device of deep-buried tunnel which characterized in that: the test device comprises a V-shaped groove, a side baffle, a loading cushion block, a hydraulic bag and a trapezoid-like test piece;
the V-shaped groove comprises a bottom plate and two side walls, the side walls comprise an inclined part and a vertical part, the inner surface of the inclined part is matched with the two inclined surfaces of the trapezoid-like test piece, and the lower surface of the bottom plate is in contact with a loading device of a testing machine and bears the pressure of the testing machine;
the side baffle plates are fixed on the front side and the rear side of the V-shaped groove, the external profiles of the side baffle plates are matched with the outer edge of the V-shaped groove, the internal surfaces of the side baffle plates are in contact with the front surface and the rear surface of the trapezoid-like test piece, and a vent hole is formed in the center of the bottom side of each side baffle plate;
the loading cushion block is divided into an upper part and a lower part, four side surfaces of the lower part are in contact with the V-shaped groove and the inner surfaces of the side baffles, and the lower surface is in contact with the hydraulic bag; the upper half part is cylindrical, and the upper surface of the upper half part is contacted with a loading device of a testing machine and bears the pressure of the testing machine;
the hydraulic bag is of a hollow structure, is filled with hydraulic oil, and has the function of converting the plane force of the loading cushion block into an arc force;
the upper surface and the lower surface of the trapezoid-like test piece are coaxial arc surfaces, the extension lines of the left side surface and the right side surface pass through the axes of the arc surfaces, the front side surface and the rear side surface are perpendicular to the horizontal plane, the left side surface and the right side surface are in contact with the inclined parts of the side walls of the V-shaped groove, the front side surface and the rear side surface are in contact with the side baffle, and the four side surfaces are coated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320577485.1U CN203502298U (en) | 2013-09-18 | 2013-09-18 | Simple model testing device for deeply buried tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320577485.1U CN203502298U (en) | 2013-09-18 | 2013-09-18 | Simple model testing device for deeply buried tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203502298U true CN203502298U (en) | 2014-03-26 |
Family
ID=50333268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320577485.1U Expired - Lifetime CN203502298U (en) | 2013-09-18 | 2013-09-18 | Simple model testing device for deeply buried tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203502298U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471915A (en) * | 2013-09-18 | 2013-12-25 | 山东科技大学 | Deeply buried tunnel simple model testing apparatus |
| CN105738213A (en) * | 2016-02-29 | 2016-07-06 | 李延 | Liquid type shallow tunnel model test loading device for surrounding rock boundary conditions |
-
2013
- 2013-09-18 CN CN201320577485.1U patent/CN203502298U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471915A (en) * | 2013-09-18 | 2013-12-25 | 山东科技大学 | Deeply buried tunnel simple model testing apparatus |
| CN103471915B (en) * | 2013-09-18 | 2015-09-16 | 山东科技大学 | Deep-lying tunnel simple model test unit |
| CN105738213A (en) * | 2016-02-29 | 2016-07-06 | 李延 | Liquid type shallow tunnel model test loading device for surrounding rock boundary conditions |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101514977B (en) | Three-dimensionally loaded guide frame device for underground project model test | |
| CN103398861B (en) | A kind of true triaxial rockburst physical simulation experiment system for deep-lying tunnel | |
| CN201886019U (en) | Solid-gas coupling integrated testing system for radon gas surface exploration overlying strata mining-induced fissures | |
| CN107036917B (en) | The Experimental Method in Laboratory of deep wall rock rock burst Burst Tendency | |
| CN204964308U (en) | Experimental monitoring system is drawn to high temperature rock stock | |
| CN105547871B (en) | A kind of static pressure rock impact funnel breaking test device and method | |
| CN106596248B (en) | A kind of side slope isolated coal pillar width based on coal sample creep test determines method | |
| CN104458565B (en) | Testing device for interaction of lateral displacement of soil body and buried pipeline | |
| CN203502298U (en) | Simple model testing device for deeply buried tunnel | |
| CN205910055U (en) | A true triaxial test anchor clamps that is used for energetic disturbance type rock template explosion to plan | |
| CN106326636B (en) | A kind of rock burst fragment ejection speed prediction technique based on releasable elastic strain energy | |
| CN103161457B (en) | A kind of two-dimensional visualization flat plate model experimental provision | |
| CN103471915B (en) | Deep-lying tunnel simple model test unit | |
| CN105738200A (en) | Visible testing device for soil layer anchoring body stress transferring mechanism and testing method of visible testing device | |
| Zhu et al. | Experiments on three-dimensional flaw dynamic evolution of transparent rock-like material under osmotic pressure | |
| CN107315880B (en) | Method for positioning three-dimensional damaged shape of straight-side wall of tunnel under action of horizontal seismic force | |
| CN103471928A (en) | Simple deeply-buried tunnel rock burst simulation test system | |
| CN103471916B (en) | Deep-lying tunnel Excavation simulation experimental provision and application process thereof | |
| CN103835319B (en) | The real stake test method of on-the-spot Observable under concrete expansion dish demifacet stake pressured state | |
| CN104032720B (en) | It is applicable to test method and the device of deep supporting course bearing capacity | |
| CN103185491B (en) | Stress relieving blasting method for side wall rock pillar type rock burst of two synchronously tunneling deeply-buried tunnels | |
| CN204825842U (en) | Static sounding who reduces lateral wall frictional resistance visits utensil | |
| Luo et al. | Mechanical behavior and damage mechanism of loaded coal and rock | |
| CN207516181U (en) | Rock compressed shearing sample containing Among Intermittent Joints under high temperature | |
| CN202548005U (en) | Large-tonnage uniformly distributed and centralized loading system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140326 Effective date of abandoning: 20150916 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140326 Effective date of abandoning: 20150916 |
|
| RGAV | Abandon patent right to avoid regrant |