CN219104602U - Physical simulation device for three-dimensional stress environment of deep buried tunnel - Google Patents
Physical simulation device for three-dimensional stress environment of deep buried tunnel Download PDFInfo
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- CN219104602U CN219104602U CN202222386132.5U CN202222386132U CN219104602U CN 219104602 U CN219104602 U CN 219104602U CN 202222386132 U CN202222386132 U CN 202222386132U CN 219104602 U CN219104602 U CN 219104602U
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- 238000004088 simulation Methods 0.000 title claims abstract description 29
- 238000011068 loading method Methods 0.000 claims abstract description 108
- 238000012360 testing method Methods 0.000 claims abstract description 14
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- 238000012544 monitoring process Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
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- 238000010586 diagram Methods 0.000 description 6
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Abstract
The utility model discloses a three-dimensional stress environment physical simulation device of a deep buried tunnel in the technical field of experimental equipment, which comprises a loading tunnel model, a plurality of loading cushion blocks arranged on the outer side of the loading tunnel model, a load measuring unit and an adjusting part, wherein the loading cushion blocks are detachably connected with the loading tunnel model through the adjusting part; the three-dimensional stress environment physical simulation device is arranged in the impact-resistant double-shaft loading system, and the impact-resistant double-shaft loading system is electrically connected with the impact-resistant double-shaft loading system; the axial compression and the lateral compression can be independently loaded respectively, the damage process of the loaded sample in different stress environments is monitored and analyzed, the structure is simple, the operation is convenient, and the test of a larger sample can be completed.
Description
Technical Field
The utility model belongs to the technical field of experimental equipment, and particularly relates to a physical simulation device for a three-dimensional stress environment of a deep buried tunnel.
Background
In the field of geotechnical engineering, a method for researching rock mechanical properties is most commonly adopted, namely, rock mass samples are collected from sites and processed into test pieces with standard sizes in a laboratory, and a pressure testing machine is adopted to carry out uniaxial, biaxial, conventional triaxial or true triaxial loading tests on the test pieces so as to obtain related rock mechanical property parameters.
Along with the gradual reduction of mining resources of underground shallow parts, projects such as mining, tunnels, underground chambers, hydropower stations and the like gradually develop into deep underground. Along with the increase of depth, the stress state of the deep rock is more complex, and the stress state of the deep rock has important influence on the deformation characteristics of the deep rock, and generally, the stress state of the deep rock can be simplified into a three-dimensional stress state, and the research on the strength and deformation characteristics of the rock in the three-dimensional stress state has important guiding significance on the damage and support of surrounding rock of a deep tunnel. However, the size of the sample of the existing triaxial test machine in China is generally smaller, and the three-dimensional stress environment of the deep buried tunnel is difficult to simulate.
Meanwhile, as the research is advanced, the ground stress is found to be gradually increased with the increase of the depth. The static stress has a larger influence on the blasting effect, so that the influence rule of the three-dimensional stress on the blasting tunneling of the deep-buried tunnel is known, the positive effect of the ground stress is fully exerted, and the negative effect of reducing the ground stress is an engineering problem which needs to be solved in the tunneling construction of the deep-buried tunnel by the drilling and blasting method.
Disclosure of Invention
The utility model aims to solve the defects in the technical field of the existing experimental equipment and provides a physical simulation device for the three-dimensional stress environment of a deep buried tunnel.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the three-dimensional stress environment physical simulation device of the deep buried tunnel comprises a loading tunnel model, a plurality of loading cushion blocks arranged on the outer side of the loading tunnel model, a load measuring unit and an adjusting part, wherein the loading cushion blocks are detachably connected with the loading tunnel model through the adjusting part, the loading tunnel model is arranged in an impact-resistant double-shaft loading system, and the impact-resistant double-shaft loading system is electrically connected with the impact-resistant double-shaft loading system;
the load measuring unit comprises a pressure sensor and a load recorder, wherein the pressure sensor is arranged between the loading cushion block and the loading tunnel model, the load recorder is arranged outside the impact-resistant double-shaft loading system, and the load recorder is electrically connected with the pressure sensor.
Preferably, the loading cushion block comprises a front main board, a rear main board, a left cushion block, a right cushion block, an upper cushion block and a lower cushion block, wherein the left cushion block is arranged on the left side of the loading tunnel model, the right cushion block is arranged on the right side of the loading tunnel model, the upper cushion block is arranged on the upper side of the loading tunnel model, the lower cushion block is arranged on the lower side of the loading tunnel model, the front main board is arranged on the front side of the loading tunnel model, the rear main board is arranged on the rear side of the loading tunnel model, and the loading tunnel model, the left cushion block, the right cushion block, the upper cushion block and the lower cushion block are arranged between the front main board and the rear main board.
Preferably, the front main board is provided with an insertion hole, and a front panel is connected to the insertion hole.
Preferably, the front panel may be provided as a test piece model with an excavated circular or horseshoe tunnel.
Preferably, a plurality of adjusting parts are provided, and the adjusting parts are adjusting bolts.
Preferably, the left cushion block, the right cushion block, the upper cushion block and the lower cushion block are respectively provided with reserved through holes which are transversely arranged, the front main board and the rear main board are respectively provided with connecting holes which correspond to the reserved through holes on the cushion block, the right cushion block, the upper cushion block and the lower cushion block, the left cushion block passes through the adjusting part and penetrates through the reserved through holes on the left cushion block and the connecting holes on the front main board and the rear main board, the right cushion block passes through the adjusting part and penetrates through the reserved through holes on the right cushion block and the connecting holes on the front main board and the rear main board are detachably connected, and the upper cushion block passes through the adjusting part and penetrates through the reserved through holes on the lower cushion block and the connecting holes on the front main board and the rear main board are detachably connected.
Preferably, the inner side of the front main board is provided with an inner convex surface with the same shape as the loading tunnel model, and the inner side of the rear main board is provided with an inner concave surface with the same size as the loading tunnel model.
Preferably, the front panel is provided with a monitoring through hole, and the rear main board is provided with a corresponding detection through hole.
Preferably, the monitoring through holes on the front panel and the detection through holes on the rear main board can observe the damage process of the loaded roadway test through the high-speed camera.
A loading method for physical simulation of three-dimensional stress environment of a deep buried tunnel comprises the following steps:
s1: preparing a loading tunnel model according to the proportion;
s2: connecting a loading cushion block, an adjusting part and a load measuring unit on the loading tunnel model, determining the shape of a front panel according to the shape of the loading tunnel model, and installing the front panel on the loading cushion block;
s3: fixing the loading tunnel model in an inner space formed by the loading cushion block through the adjusting part, and connecting the pressure sensor and the load measuring unit;
s4: the method comprises the steps of installing an installed loading tunnel model into an anti-impact double-shaft loading system, connecting an anti-impact double-shaft loading controller, controlling the circumferential confining pressure of the loading tunnel model through the anti-impact double-shaft loading controller, rotating an adjusting part, displaying the axial confining pressure of the loading tunnel model through a pressure sensor, and transmitting a pressure value to a load recorder;
s5: under the condition of light source probing, a high-speed camera is turned on, focal lengths of the light source and the high-speed camera are adjusted, and a damage process of surrounding rock of the loaded tunnel model is recorded by the high-speed camera through a monitoring through hole;
s6: closing the impact-resistant double-shaft loading system and the impact-resistant double-shaft loading controller, sequentially removing the adjusting part and the loading cushion block, and taking out the loading tunnel model;
s7: and turning off the high-speed camera, and analyzing the experimental damage phenomenon.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides a three-dimensional stress environment physical simulation device of tunnel deeply buries, provides controllable side pressure through shock resistance biax loading system, and fore-and-aft axle pressure is provided by adjusting part, and loading pressure is big and load is stable, and each direction can independently load each other, can provide the axle pressure and the side pressure of different combinations, need not carry out complicated structural design to biax loading equipment and just can the item three-dimensional loading; the utility model has simple structure and strong shock resistance and vibration capability, can be used for loading experiments with shock vibration characteristics such as blasting and the like, can take out a loaded sample after the experiments are completed, enables the loading cushion block to be reusable, is convenient and practical, and has good application prospect.
Drawings
FIG. 1 is a schematic diagram of a physical simulation device for three-dimensional stress environment of a deep buried tunnel;
FIG. 2 is a schematic diagram of an explosion structure of a physical simulation device for a three-dimensional stress environment of a deep buried tunnel;
FIG. 3 is a schematic diagram of the front main board and front panel of the physical simulation device for three-dimensional stress environment of a deep tunnel according to the present utility model;
FIG. 4 is a schematic diagram showing the structure of a front main board I-I section of a three-dimensional stress environment physical simulation device for a deep tunnel according to the present utility model;
FIG. 5 is a schematic diagram of the structure of a rear main board of the physical simulation device for the three-dimensional stress environment of the deep tunnel;
FIG. 6 is a schematic diagram of a three-dimensional stress environment loading structure of a physical simulation device for three-dimensional stress environment of a deep buried tunnel.
In the accompanying drawings, 1: front motherboard, 2: front panel, 3: left cushion block, 4: right pad, 5: upper cushion block, 6: lower cushion block, 7: rear main board, 8: adjustment part, 9: pressure sensor, 10: load recorder, 11: monitoring through holes, 12: reserved through holes, 13: loading a tunnel model, 14: impact-resistant biaxial loading system, 15: large steel plate, 16: small steel plate, 17: bolt, 18: three-dimensional stress environment physical simulation device, 19: impact dual axis loading system controller, 20: high speed camera, 21: a light source.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
As shown in fig. 1-6, a three-dimensional stress environment physical simulation device for a deep buried tunnel is provided, a loading tunnel model is installed in an anti-impact double-shaft loading system 14 to form a three-dimensional stress environment physical simulation device, and the anti-impact double-shaft loading system 14 is electrically connected with an anti-impact double-shaft loading system controller 19; the three-dimensional stress environment physical simulation device 18 is provided with side pressure by the impact-resistant double-shaft loading system 14, and the magnitude of the side pressure of the loading tunnel model 13 is controlled through signal transmission with the impact-resistant double-shaft loading system controller 19.
The three-dimensional stress environment physical simulation device 18 comprises a loading tunnel model 13, loading cushion blocks, a load measuring unit and an adjusting part 8, wherein the loading cushion blocks are arranged in the axial direction of the loading tunnel model 13, and the loading cushion blocks are detachably connected through the adjusting part 8; the load measuring unit comprises a pressure sensor 9 and a load recorder 10, wherein the pressure sensor 9 is arranged between the loading cushion block and the loading tunnel model 13, the load recorder 10 is arranged outside the impact-resistant double-shaft loading system 14, the load recorder 10 is electrically connected with the pressure sensor 9, and the pressure sensor can be an annular pressure sensor.
In the embodiment, the loading cushion block comprises a front main board 1, a front panel 2, a left cushion block 3, a right cushion block 4, an upper cushion block 5, a lower cushion block 6 and a rear main board 7; the annular pressure sensor 9 is arranged between the front main plate 7 and the adjusting part 8; the adjusting parts 8 can be arranged into 8 pieces, the adjusting parts 8 penetrate through the reserved through holes 12, the adjusting parts 8 are screwed, the front and back axle pressures are adjusted, the size of the load recorder 10 is 2kN, and the screwing of the adjusting parts 8 is stopped.
In this embodiment, the front panel 2 may be provided with a circular or horseshoe tunnel model for the sample to be loaded according to the engineering practice.
In this embodiment, the whole three-dimensional stress environment physical simulation device 18 is configured as a detachable structure.
In this embodiment, a spacer is provided on the adjusting portion between the front main plate 1 and the front panel 2, and the spacer may be made of steel.
In this embodiment, in the loading cushion blocks, the loading tunnel model 13 with different sizes can be loaded in three directions by changing the sizes of the front main board 1, the front panel 2, the left cushion block 3, the right cushion block 4, the upper cushion block 5, the lower cushion block 6 and the rear main board 7.
In this embodiment, corresponding reserved through holes 11 and detection through holes are provided on the front panel 2 and the rear main board 7, and the destruction process of the loaded sample can be observed by means of a high-speed camera through the reserved through holes 11 and the detection through holes.
In this embodiment, the front main board 1 may employ a large steel plate 15, the front panel 2 may employ a small steel plate 16, the front main board 1 and the rear main board 7 are provided with front panels 2 for force transmission, the adjusting portion 8 may employ hexagon socket head cap bolts 17, and the force transmission plate is made of Q235 steel and is connected with the large steel plate 15 through the hexagon socket head cap bolts 17.
In the embodiment, the upper cushion block 3, the lower cushion block 4, the left cushion block 5 and the right cushion block 6 are all formed by punching Q235 steel plates.
In this embodiment, the height of the left pad 5 and the height of the right pad 6 are smaller than the height of the loaded sample 13, the upper pad 3 and the lower pad 4.
In the embodiment, the loading tunnel model 13 adopts a circular tunnel model, and the size of the loading tunnel model adopts a cement mortar test piece with the size of 300mm multiplied by 200 mm; the model of the impact-resistant biaxial loading test system is ZLCJS-5000, and the horizontal and vertical maximum loading force is 5000kN; the adjusting bolt adopts 8 custom bolts with the diameter of 30 mm; the model of the annular pressure sensor is BHR-4/100T, and the measuring range is 0-1000 kN; the high speed camera model monitoring the destruction process is Kirana-05M.
The loading method adopting the three-dimensional stress environment physical simulation device comprises the following steps:
s1: according to cement: coarse sand: fine sand: the water is 1:1.7:1.7: a cement mortar test piece loaded with a tunnel model is configured according to the proportion of 0.7, the tunnel model is set to be round, the tunnel diameter is 60mm, and the cement mortar test piece is put into a mold with the diameter of 300mm multiplied by 200mm, and standard curing is carried out for 28 days;
s2: installing a lower cushion block on an impact-resistant double-shaft loading experiment platform, covering the upper surface of the lower cushion block with a plastic film uniformly coated with butter, placing a loaded tunnel model on the plastic film, covering the upper surface of the tunnel model with the plastic film uniformly coated with butter, and placing an upper cushion block;
s3: installing a left cushion block and a right cushion block on two sides of a loaded tunnel model, covering plastic films uniformly coated with butter on the left side surface and the right side surface of the tunnel model, and knocking the left cushion block and the right cushion block by using a rubber hammer to enable the left cushion block and the right cushion block to be in close contact with the loaded tunnel model;
s4: positioning and aligning the front main board and the rear main board according to the reserved through holes of the adjusting bolts, and respectively installing the front main board and the rear main board on the front side and the rear side of the loaded tunnel;
s5: the adjusting bolts penetrate through the 8 reserved through holes, then the annular pressure sensor is arranged between the adjusting bolts and the rear main board, the adjusting bolts are screwed, so that the loaded tunnel is tightly contacted with the front main board and the rear main board, and the size of the load recorder is displayed as 2kN;
s6: starting an impact-resistant double-shaft loading system, controlling the up-down pressure and the left-right confining pressure of a loaded tunnel model to be 600kN and 1080kN respectively, rotating an adjusting bolt, and controlling the front-rear shaft pressure of the loaded tunnel model through the indication of an annular pressure sensor, so that the size of a load recorder is displayed as 182kN, and meanwhile, the pressure value is transmitted to the load recorder;
is used for simulating the stress of the rock mass up and down, left and right and front and back to be respectively 10MPa, 18MPa and 2MPa.
S7: turning on a high-speed camera, debugging a focusing tunnel model area, and recording the damage process of the loaded tunnel model by using the high-speed camera;
s8: after the experiment is finished, closing the impact-resistant double-shaft loading system, and sequentially removing devices such as the adjusting bolts, the loading cushion blocks and the like;
s9: and turning off the high-speed camera, and analyzing the experimental phenomenon.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (9)
1. The three-dimensional stress environment physical simulation device for the deep buried tunnel is characterized by comprising a loading tunnel model (13), a plurality of loading cushion blocks arranged on the outer side of the loading tunnel model (13), a load measuring unit and an adjusting part (8) which are arranged on the loading tunnel model (13), wherein the loading cushion blocks are detachably connected through the adjusting part (8), the loading tunnel model (13) is arranged in an impact-resistant double-shaft loading system (14), and the impact-resistant double-shaft loading system (14) is electrically connected with an impact-resistant double-shaft loading system controller (19);
the load measuring unit comprises a pressure sensor (9) and a load recorder (10), wherein the pressure sensor (9) is arranged between the loading cushion block and the loading tunnel model (13), the load recorder (10) is arranged outside the impact-resistant double-shaft loading system (14), and the load recorder (10) is electrically connected with the pressure sensor (9).
2. The deep tunnel three-dimensional stress environment physical simulation device according to claim 1, wherein the loading cushion block comprises a front main board (1), a rear main board (7), a left cushion block (3), a right cushion block (4), an upper cushion block (5) and a lower cushion block (6), the left cushion block (3) is arranged on the left side of the loading tunnel model (13), the right cushion block (4) is arranged on the right side of the loading tunnel model (13), the upper cushion block (5) is arranged on the upper side of the loading tunnel model (13), the lower cushion block (6) is arranged on the lower side of the loading tunnel model (13), the front main board (1) is arranged on the front side of the loading tunnel model (13), the rear main board (7) is arranged on the rear side of the loading tunnel model (13), and the loading tunnel model (13), the left cushion block (3), the right cushion block (4), the upper cushion block (5) and the lower cushion block (6) are arranged between the front main board (1) and the rear main board (7).
3. The physical simulation device for the three-dimensional stress environment of the deep tunnel according to claim 2, wherein the front main board (1) is provided with an embedded hole, and a front panel (2) is connected in the embedded hole.
4. A device for simulating the physical environment of three-dimensional stress of a deep buried tunnel according to claim 3, characterized in that said front panel (2) is configured as a test piece model with an excavated circular or horseshoe-shaped tunnel.
5. The physical simulation device for the three-dimensional stress environment of the deep tunnel according to claim 4, wherein a plurality of adjusting parts (8) are arranged, and the adjusting parts (8) are adjusting bolts.
6. The device according to claim 5, wherein the left cushion block (3), the right cushion block (4), the upper cushion block (5) and the lower cushion block (6) are respectively provided with reserved through holes (12) which are transversely arranged, the front cushion block (1) and the rear cushion block (7) are respectively provided with connecting holes which correspond to the reserved through holes (12) on the cushion block (3), the right cushion block (4), the upper cushion block (5) and the lower cushion block (6), the left cushion block (3) is detachably connected with the reserved through holes (12) on the left cushion block (3) and the connecting holes on the front cushion block (1) and the rear cushion block (7) through the adjusting part (8), the right cushion block (4) is detachably connected with the reserved through holes (12) on the right cushion block (4) and the connecting holes on the front cushion block (1) and the rear cushion block (7) through the adjusting part (8), the upper cushion block (5) is detachably connected with the front cushion block (1) and the reserved through holes (7) on the front cushion block (1) through the adjusting part (8), the lower cushion block (6) is detachably connected with the connecting holes on the front main board (1) and the rear main board (7) by the reserved through holes (12) penetrating through the lower cushion block (6) through the adjusting part (8).
7. The physical simulation device for the three-dimensional stress environment of the deep buried tunnel according to claim 6, wherein an inner convex surface with the same shape as the loading tunnel model (13) is arranged on the inner side of the front main board (1), and an inner concave surface with the same size as the loading tunnel model (13) is arranged on the inner side of the rear main board (7).
8. The physical simulation device for the three-dimensional stress environment of the deep tunnel according to claim 7, wherein the front panel (2) is provided with a monitoring through hole (11), and the rear main board (7) is provided with a corresponding detection through hole.
9. The physical simulation device for the three-dimensional stress environment of the deep buried tunnel according to claim 8, wherein the monitoring through holes (11) on the front panel (2) and the detection through holes on the rear main board (7) can observe the damage process of the loaded tunnel test through the high-speed camera (20).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222386132.5U CN219104602U (en) | 2022-09-05 | 2022-09-05 | Physical simulation device for three-dimensional stress environment of deep buried tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222386132.5U CN219104602U (en) | 2022-09-05 | 2022-09-05 | Physical simulation device for three-dimensional stress environment of deep buried tunnel |
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| CN219104602U true CN219104602U (en) | 2023-05-30 |
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| CN202222386132.5U Active CN219104602U (en) | 2022-09-05 | 2022-09-05 | Physical simulation device for three-dimensional stress environment of deep buried tunnel |
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| Country | Link |
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| CN (1) | CN219104602U (en) |
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2022
- 2022-09-05 CN CN202222386132.5U patent/CN219104602U/en active Active
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