Testing device for simulating interaction between TBM tunnel and stratum

Abstract

The utility model discloses a test device for simulating the interaction of TBM tunnel and stratum, including test box body, pressure subassembly, duct piece model and reaction frame, one side of test box body is provided with notch, and the interior is provided with soil mass, the interior of soil mass is provided with placing hole, the interior of placing hole is used for placing duct piece model, the reaction frame is used for placing the duct piece model. A pressure assembly is further arranged in the test box body, a reaction frame is arranged on one side of the test box body, a torque electric rotating machine is arranged on one side of the reaction frame, and the torque electric rotating machine is connected with the segment model; the confining pressure of a soil body is provided through the pressure assembly, the soil body in the actual situation is simulated, the torque electric rotating machine is matched with the segment model, a rotating force is provided for the segment model, and the rotating force is used for simulating that a lining ring generates a torsional force when a shield cutter rotates, so that shield tunneling in the actual engineering can be better simulated, and the shield tunneling efficiency is improved. And the interaction between the TBM tunnel and the stratum is researched.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel simulation tests, in particular to a test device for simulating the interaction between a TBM tunnel and a stratum. Background Art

[0002] In recent years, with the rapid development of cities, urban rail transit has also emerged, including subway systems. TBM tunnels are widely used in subway construction because of their high efficiency, high safety and adaptability to various geological conditions. The tunnel structure of a shield tunnel is composed of arc-shaped segments. During the excavation process of the shield machine, the segments will generate torsional force, which will have a certain impact on the surrounding soil. However, in the prior art, during the tunnel excavation test, most of the simulations are about the cutterhead, tunnel excavation or segment force, and no in-depth study is conducted on the interaction between the segments in the TBM tunnel and the soil under the action of the shield machine; such as the "An Experimental Device for Shield Tunnel Excavation Simulation" disclosed in the Chinese patent announcement number CN217133891U, which simulates the excavation process of the shield tunnel by setting a segment model inside the simulation box, cooperating with hydraulic oil and pistons; however, the patent only uses the piston to excavate in the segment model, and does not consider that the segments inside the tunnel will generate torsional force under the action of the shield cutterhead, and have a certain impact on the soil.

[0003] In view of this, the existing technology still needs to be improved and developed. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a test device for simulating the interaction between a TBM tunnel and the stratum, aiming to solve the problem that the existing shield excavation test does not consider the interaction between the tunnel segments and the soil when generating torsional force.

[0005] The technical solution adopted by the utility model to solve the technical problem is as follows:

[0006] A test device for simulating the interaction between a TBM tunnel and a stratum, comprising:

[0007] A test box; a notch is provided on one side of the test box, a soil body is provided inside the test box, and a placement hole is provided inside the soil body;

[0008] A pressure component is arranged inside the test box; the pressure component is connected to the soil body and is used to provide pressure to the soil body;

[0009] A segment model is arranged in a placement hole of the soil body;

[0010] A reaction frame is arranged on one side of the test box, and a torque motor is arranged on the side of the reaction frame close to the test box. The output shaft of the torque motor passes through the notch and is connected to the segment model.

[0011] Furthermore, a mud layer is provided on the outer surface of the segment model.

[0012] Furthermore, the mud layer comprises:

[0013] An unsolidified mud layer is arranged inside the test box and located at one end close to the reaction frame;

[0014] A semi-solidified mud layer is arranged inside the test box and is located on a side of the unsolidified mud layer away from the reaction frame;

[0015] The solidified mud layer is arranged inside the test box and is located on a side of the semi-solidified mud layer away from the reaction frame.

[0016] Furthermore, the pressure assembly includes a plurality of jack groups, and the jack group includes a plurality of jacks; the plurality of jack groups are respectively arranged on the inner wall of the test box, and a pad is provided at one end of the jack group close to the soil body.

[0017] Furthermore, a filling box is arranged outside the soil body, the filling box has an upward opening, a cover plate is arranged at the opening position of the filling box, and a plurality of the pads are in contact with the side walls of the filling box and the top wall of the cover plate.

[0018] Furthermore, a through hole is provided on one side of the filling box, and the through hole corresponds to the notch and is used for placing the segment model.

[0019] Furthermore, a slot is provided on the side wall of the filling box corresponding to the through hole, and a buckle is provided on one side wall of the segment model, and the buckle cooperates with the slot to connect the segment model to the inner wall of the filling box.

[0020] Furthermore, the slot of the filling box is an annular slot, and the buckle cooperates with the slot and can slide inside the slot.

[0021] Furthermore, a bearing tube segment is coaxially arranged on the output shaft of the torque motor, and the bearing tube segment is arranged in the notch and connected to the tube segment model.

[0022] Furthermore, the test box includes:

[0023] An open box body; the open box body has an upward opening, and a fixing seat is provided at the bottom of the open box body;

[0024] The box cover is arranged on the top of the open box body and is used to seal the opening of the open box body; the box cover is connected to the open box body by bolts.

[0025] Compared with the prior art, the beneficial effects of the utility model are:

[0026] In the utility model, a slot is provided on one side of the test box, and soil is provided inside, a placement hole is provided inside the soil, and the placement hole is used to place a segment model, a pressure component is also provided inside the test box, the pressure component is connected to the soil and is used to provide pressure to the soil, a reaction frame is provided on one side of the test box, a torque motor is provided on one side of the reaction frame, and the torque motor is connected to the segment model; the confining pressure of the soil is provided by the pressure component to simulate the soil in the actual situation, and a rotational force is provided to the segment model through the torque motor in cooperation with the segment model to simulate that when the shield cutter head rotates, the lining ring generates a torsional force, so as to better simulate the shield machine excavation in the actual project and study the interaction between the TBM tunnel and the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0028] Figure 2 This is a schematic diagram of the structure of the pressure component of the utility model.

[0029] Figure 3 It is a schematic diagram of the torque electric motor and bearing tube structure of the utility model.

[0030] Figure 4 This is a schematic diagram of the bearing tube structure of the utility model.

[0031] The numbers in the figure are as follows: 1. test box; 11. soil; 12. open box; 13. box cover; 2. pressure assembly; 21. jack set; 22. pad; 3. segment model; 4. reaction frame; 41. torque motor; 42. bearing segment; 5. mud layer; 51. unsolidified mud layer; 52. semi-solidified mud layer; 53. solidified mud layer; 6. filling box; 61. cover. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0033] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In view of the shortcomings of the prior art, this embodiment provides a test device for simulating the interaction between a TBM tunnel and a stratum, which can be specifically described as follows:

[0036] As attached Figure 1 and attached Figure 2As shown, a test device for simulating the interaction between a TBM tunnel and a stratum includes a test box 1, a pressure assembly 2, a segment model 3 and a reaction frame 4. A soil 11 is arranged inside the test box 1. A placement hole is arranged inside the soil 11 for placing the segment model 3. A slot is opened on one side of the test box 1. A pressure assembly 2 is also arranged inside the test box 1. The pressure assembly 2 is connected to the soil 11 and is used to provide pressure to the soil 11 to simulate the stress condition of the soil 11 in reality. A reaction frame 4 is arranged on one side of the test box 1. The reaction frame 4 and the test box 1 can both be used Fixed on the experimental platform, a torque motor 41 is provided on one side of the reaction frame 4 close to the test box 1, and the output shaft of the torque motor 41 is connected to the segment model 3 through the slot; the confining pressure of the soil 11 is provided through the pressure component 2 to simulate the soil 11 in the actual situation, and the torque motor 41 cooperates with the segment model 3 to provide a rotational force to the segment model 3, which is used to simulate that when the shield cutter head rotates, the lining ring (i.e., the segment model 3) in the tunnel generates a torsional force, thereby better simulating the shield machine excavation in the actual project and studying the interaction force between the TBM tunnel and the soil.

[0037] Specifically, the test box 1 is first assembled, and then part of the soil 11 is filled. The height of the soil 11 is located at the slot position of the test box 1. Then the segment model 3 is placed so that the segment model 3 and the slot are coaxially arranged to facilitate the connection between the torque motor 41 and the segment model 3. Then, the soil 11 is filled, and the pressure assembly 2 is set. By starting the torque motor 41, a simulation test can be carried out.

[0038] In different soil bodies 11, there will be gaps between the pipe segments inside the tunnel and the soil bodies 11 outside. In the prior art, the gaps are filled by pouring concrete to prevent the external soil layer from affecting the pipe segments due to the existence of the gaps.

[0039] As attached Figure 1 and attached Figure 2 As shown, a mud layer 5 is provided on the outer surface of the segment model 3, and the mud layer 5 is used to simulate the concrete layer in the existing excavation; by providing the mud layer 5, the interaction force between the segment and the soil 11 in the existing construction process can be better simulated.

[0040] In one embodiment of the present application, the mud layer 5 includes an unsolidified mud layer 51, a semi-solidified mud layer 52 and a solidified mud layer 53. The unsolidified mud layer 51 is located inside the test box 1 and close to one end of the reaction frame 4, the semi-solidified mud layer 52 is located on the side of the unsolidified mud layer 51 away from the reaction frame 4, and the solidified mud layer 53 is located on the side of the semi-solidified mud layer 52 away from the reaction frame 4, that is, they are arranged in sequence from left to right; in engineering, the strength of concrete is divided into 1-day strength, 14-day strength and 28-day strength, the unsolidified mud layer 51 corresponds to the 1-day strength of concrete, the semi-solidified mud layer 52 corresponds to the 14-day strength of concrete, and the solidified mud layer 53 corresponds to the 28-day strength of concrete; by setting a plurality of mud layers 5 of different strengths, the tests of concrete strength at different periods can be simulated at the same time, which makes the invention closer to actual engineering and can also improve the test efficiency.

[0041] As attached Figure 1 and attached Figure 2 As shown, the pressure assembly 2 includes a plurality of jack groups 21, each jack group 21 includes a plurality of jacks, and the plurality of jack groups 21 are respectively arranged on the inner wall of the test box 1; specifically, four jack groups 21 are arranged inside the test box 1, and the four jack groups 21 are respectively located on the front side, the rear side, the upper side and the lower side of the test box 1, and the jack group 21 is not arranged on the side of the test box 1 where the slot is arranged and the side corresponding to the slot, and the left and right sides of the soil 11 are not in contact with the segment model 3, and the directions in which the soil 11 acts on the segment model 3 are the front, rear, upper and lower directions; further, a pad 22 is arranged on one end of the jack group 21 close to the soil 11, and the pad 22 abuts against the soil 11 for applying pressure to the soil 11.

[0042] In one embodiment of the present application, a filling box 6 is provided on the outside of the soil body 11, and the filling box 6 has an upward opening to facilitate the filling of the soil body 11. The interior of the filling box 6 is used to fill the soil body 11, and a cover plate 61 is also provided on the top of the filling box 6. The pad 22 of the jack group 21 is in contact with the side wall of the filling box 6 and the top wall of the cover plate 61, so as to fix and squeeze the filling box 6 and the cover plate 61.

[0043] In this embodiment, the left and right side walls of the filling box 6 are respectively abutted against the left and right inner walls of the test box 1, and the left and right side walls of the filling box 6 are not provided with a jack group 21. A through hole is opened in the left side wall of the filling box 6, and the through hole corresponds to the groove for placing the pipe segment model 3.

[0044] In this embodiment, a slot is provided on the side wall of the filling box 6 corresponding to the through hole, and a buckle is provided on one side wall of the segment model 3. The buckle cooperates with the slot to connect the segment model 3 to the inner wall of the filling box 6. At the same time, the end of the segment model 3 away from the slot can be placed on the inner wall of the through hole to prevent the segment model 3 from vertical displacement, which makes it inconvenient to connect with the torque motor 41.

[0045] In this embodiment, the card slot located in the filling box 6 is an annular card slot, and the buckle cooperates with the card slot, and the buckle can slide inside the card slot, that is, the segment model 3 can rotate but cannot move vertically, so as to facilitate the torque motor 41 to apply rotational force to the segment model 3, and also facilitate the subsequent rotation test of the segment model 3.

[0046] As attached Figure 3 and attached Figure 4 As shown, the output shaft of the torque motor 41 is coaxially provided with a bearing segment 42, which is arranged in the slot and connected to the segment model 3; the output shaft of the torque motor 41 rotates, driving the bearing segment 42 and the segment model 3 to rotate, so that the segment model 3 generates a specific torsional force, which is used for the simulation experiment between the segment model 3 and the soil 11.

[0047] In one embodiment of the present application, the test box 1 includes an open box 12 and a box cover 13. The open box 12 has an upward opening to facilitate the placement of test devices inside. A fixing seat is provided at the bottom of the open box 12 for fixing the open box 12 to facilitate simulation tests. A box cover 13 is provided at the top of the open box 12 for sealing the opening of the open box 12, and the box cover 13 is connected to the open box 12 by bolts, so that the jack group 21 is conveniently set on the bottom wall of the box cover 13 to apply pressure to the soil 11.

[0048] In one embodiment of the present application, a plurality of soil pressure boxes are arranged inside the soil body 11 and are evenly distributed inside the soil body 11, so as to detect the pressure of the soil body 11, so as to facilitate the adjustment of the pressure of the jack group 21; synchronously, strain gauges, displacement meters and fiber grating sensors are also arranged on the outside of the segment model 3, so as to detect the strain force and displacement of the segment model 3, so as to facilitate the subsequent analysis and calculation of the test.

[0049] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the solutions disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not disclosed in the present solution. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present invention are indicated by the claims.

Claims

1. A test device for simulating the interaction between a TBM tunnel and a stratum, characterized in that: include: A test box; a notch is provided on one side of the test box, a soil body is provided inside the test box, and a placement hole is provided inside the soil body; A pressure component is arranged inside the test box; the pressure component is connected to the soil body and is used to provide pressure to the soil body; A segment model is arranged in a placement hole of the soil body; A reaction frame is arranged on one side of the test box, and a torque motor is arranged on the side of the reaction frame close to the test box. The output shaft of the torque motor passes through the notch and is connected to the segment model.

2. A test device for simulating the interaction between a TBM tunnel and a stratum according to claim 1, characterized in that: A mud layer is provided on the outer surface of the segment model.

3. A test device for simulating the interaction between a TBM tunnel and a stratum according to claim 2, characterized in that: The mud layer comprises: An unsolidified mud layer is arranged inside the test box and located at one end close to the reaction frame; A semi-solidified mud layer is arranged inside the test box and is located on a side of the unsolidified mud layer away from the reaction frame; The solidified mud layer is arranged inside the test box and is located on a side of the semi-solidified mud layer away from the reaction frame.

4. A test device for simulating the interaction between a TBM tunnel and a stratum according to claim 1, characterized in that: The pressure assembly includes a plurality of jack groups, and the jack group includes a plurality of jacks; the plurality of jack groups are respectively arranged on the inner wall of the test box, and a pad is arranged at one end of the jack group close to the soil body.

5. A test device for simulating the interaction between a TBM tunnel and a stratum according to claim 4, characterized in that: A filling box is arranged outside the soil body, the filling box has an upward opening, a cover plate is arranged at the opening position of the filling box, and a plurality of the pads are in contact with the side walls of the filling box and the top wall of the cover plate.

6. A test device for simulating the interaction between a TBM tunnel and a stratum according to claim 5, characterized in that: A through hole is provided on one side of the filling box, and the through hole corresponds to the notch and is used for placing the segment model.

7. A test device for simulating the interaction between a TBM tunnel and a stratum according to claim 6, characterized in that: A slot is provided on the side wall of the filling box corresponding to the through hole, and a buckle is provided on one side wall of the segment model. The buckle cooperates with the slot to connect the segment model with the inner wall of the filling box.

8. A test device for simulating the interaction between a TBM tunnel and a stratum according to claim 7, characterized in that: The slot of the filling box is an annular slot, and the buckle matches with the slot and can slide inside the slot.

9. The test device for simulating the interaction between a TBM tunnel and a stratum according to claim 1, characterized in that: The output shaft of the torque motor is coaxially provided with a bearing tube segment, and the bearing tube segment is arranged in the notch and connected to the tube segment model.

10. The test device for simulating the interaction between a TBM tunnel and a stratum according to claim 1, characterized in that: The test box comprises: An open box body; the open box body has an upward opening, and a fixing seat is provided at the bottom of the open box body; The box cover is arranged on the top of the open box body and is used to seal the opening of the open box body; the box cover is connected to the open box body by bolts.

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