Test device and test method for simulating connection channel pipe-jacking method construction

Abstract

The invention provides a test device and a test method for simulating connection channel pipe-jacking method construction, the test device comprises a model box, a main tunnel model and a connection channel model, the main tunnel model is arranged in the model box, one side of the main tunnel model is provided with a through hole, and the connection channel model is located in the main tunnel model; a soil body is filled between the model box and the main tunnel model; a supporting device, a pushing device and a detection device are arranged in the main tunnel model, the supporting device comprises a supporting body, a horizontal supporting assembly and a vertical supporting assembly, the horizontal supporting assembly and the vertical supporting assembly are independently arranged on the supporting body, one end of the pushing device is connected with the horizontal supporting assembly, and the other end of the pushing device is connected with the detection device. The other end of the main tunnel model is used for pushing the connection channel model to enter the soil body through the through hole, and the detection device is used for detecting strain and stress of the main tunnel model in real time. According to the invention, actual construction conditions can be simulated, and the influence of different jacking forces and pre-supporting forces on the main tunnel structure can be researched.

Description

Technical Field

[0001] The invention relates to the technical field of simulated pipe jacking construction, and in particular to a test device and a test method for simulated pipe jacking construction of a communication channel. Background Art

[0002] The construction of connecting passages by pipe jacking is a dark excavation construction method used when crossing various obstacles such as railways, roads, rivers or buildings. It has the advantages of safety, low pollution and short construction period. At present, the research on the construction of connecting passages by pipe jacking is more reflected in numerical simulation and on-site monitoring. The research on the influence of different jacking forces and pre-support forces on the main tunnel structure during the simulation construction process is still relatively scarce. Therefore, the present invention relies on actual engineering to carry out scaled model tests, provides a device basis for model test research on the pipe jacking method of connecting passages, and conducts experimental research on the strain and stress of the main tunnel segments caused by different jacking forces and pre-support forces.

[0003] The invention with publication number CN210768782U discloses a simulation test device for tunnel excavation and support, including a support assembly and a simulation assembly, wherein the support assembly includes a support, a telescopic shaft, a support box and a jacking cylinder, wherein the jacking cylinder is fixed inside the support, and the output end of the jacking cylinder is transmission-connected to the telescopic shaft, and the telescopic shaft passes through the outer wall of the support. However, the simulation test device for tunnel excavation and support is only used to simulate environmental problems such as ground deformation caused by construction processes such as jacking pipes and earth pressure shields, and cannot simulate the effects of different jacking forces and pre-support forces on the main tunnel structure. Summary of the invention

[0004] The purpose of the present invention is to solve the defects in the prior art and provide a test device and method for simulating the construction of a connecting channel by pipe jacking method, which can simulate the actual construction conditions and carry out research on the influence of different jacking forces and pre-support forces on the main tunnel structure.

[0005] To achieve the above object, the present invention provides a test device for simulating the construction of a connecting channel by a pipe jacking method, comprising a model box, a main tunnel model and a connecting channel model, wherein the main tunnel model is arranged in the model box, a through hole is arranged on one side of the main tunnel model, the connecting channel model is located in the main tunnel model, and soil is filled between the model box and the main tunnel model;

[0006] A supporting device, a pushing device and a detecting device are provided in the main tunnel model. The supporting device comprises a supporting body, a horizontal supporting assembly for applying a horizontal pre-support force to the main tunnel model, and a vertical supporting assembly for applying a vertical pre-support force to the main tunnel model. The horizontal supporting assembly and the vertical supporting assembly are independently arranged on the supporting body. One end of the pushing device is connected to the horizontal supporting assembly, and the other end is used to push the communication channel model through the through hole into the soil. The detecting device is used to detect the strain and stress of the main tunnel model in real time.

[0007] Optionally, the pushing device includes a pushing drive member and a sleeve, one end of the pushing drive member is connected to the horizontal support assembly, and the other end is detachably connected to the sleeve.

[0008] Optionally, the sleeve is a hollow structure.

[0009] Optionally, the horizontal support assembly includes a horizontal support rod arranged on a support body, a horizontal fixed plate and a horizontal movable plate respectively arranged at both ends of the horizontal support rod, a horizontal driving member for driving the horizontal movable plate to move is provided between the horizontal support rod and the horizontal movable plate, and the pushing device is connected to the horizontal fixed plate.

[0010] Optionally, the horizontal driving member is a hydraulic telescopic device.

[0011] Optionally, the horizontal support components are respectively arranged on both sides of the pushing device.

[0012] Optionally, the vertical support assembly includes a vertical support rod arranged on the support body, a vertical fixed plate and a vertical movable plate respectively arranged at both ends of the vertical support rod, and a vertical driving member for driving the vertical movable plate to move is provided between the vertical support rod and the vertical movable plate.

[0013] Optionally, the vertical support assembly includes a vertical support rod arranged on the support body, and vertical movable plates respectively arranged at both ends of the vertical support rod, and the vertical support rod is provided with a vertical driving member for driving the vertical movable plate to move.

[0014] Optionally, the detection device includes a pressure sensor and a stress sheet arranged on the main tunnel model.

[0015] The present invention also provides a test method based on the test device for simulating the construction of the connecting channel pipe jacking method, comprising the following steps:

[0016] S1. Put the main tunnel model and the communication channel model into the model box;

[0017] S2. Setting a detection device on the main tunnel model;

[0018] S3, filling the model box with soil;

[0019] S4, starting the horizontal support assembly and the vertical support assembly to apply horizontal pre-support force and vertical pre-support force to the main tunnel model;

[0020] S5, starting the pushing device to push the communication channel model into the soil through the through hole;

[0021] S6. The detection device detects the strain and stress of the main tunnel model in real time.

[0022] Beneficial effects:

[0023] 1. The test device for simulating the pipe jacking construction of the communication channel of the present invention is formed by a reduced design simulation, and includes a model box, a main tunnel model and a communication channel model. The main tunnel model is provided with a supporting device, a jacking device and a detection device.

[0024] The main tunnel model and the connecting channel model are placed in a model box, and a detection device is set at the position where the main tunnel model is subjected to pre-support force and jacking force to monitor the strain and stress data of the main tunnel segment; the gaps between the main tunnel model and the model box, and between the connecting channel model and the model box are filled with soil; the simulation of the jacking method construction process begins, the horizontal support component is started to apply horizontal pre-support force to the main tunnel model, the vertical support component is started to apply vertical pre-support force to the main tunnel model, and then the jacking device is started to jack the connecting channel model through the through hole into the soil. When simulating the jacking method construction process, the detection device detects the strain and stress of the main tunnel model in real time.

[0025] The present invention can simulate actual construction conditions to carry out experiments on the simulated connecting channel pipe jacking construction method, and study the influence of different jacking forces, and different horizontal and vertical pre-support forces on the main tunnel model structure.

[0026] 2. The horizontal support assembly and the vertical support assembly in the present invention are used to apply horizontal pre-support force and horizontal pre-support force in the horizontal direction and vertical direction respectively. The horizontal support assembly and the vertical support assembly are independently arranged on the support body, and the horizontal pre-support force and the vertical pre-support force can be controlled separately to concentrate the applied pre-support force, and the horizontal pre-support force and the horizontal pre-support force will not affect each other. According to the different soil pressures in the horizontal and vertical directions during actual construction, the pre-support force applied by the horizontal support assembly and the vertical support assembly to the main tunnel segment in the horizontal and vertical directions can be adjusted.

[0027] 3. In the present invention, one end of the jacking device is connected to the horizontal support assembly. When the jacking device pushes the connecting channel model, the jacking force applied acts on the horizontal support assembly, which can avoid the stress concentration caused by the jacking force directly acting on the main tunnel model and reduce the damage to the pipe segments of the main tunnel model.

[0028] 4. In the present invention, the sleeve is detachably arranged on the pushing drive member, and its shape can be adjusted according to the communication channel model with different cross-sections, and the communication channel model with different cross-sections can be pushed. The pushing drive member and the sleeve are connected by bolts to facilitate installation and disassembly, such as installing communication channels with standard circular cross-sections, large circular cross-sections, rectangular cross-sections, etc.

[0029] 5. In the present invention, the sleeve is a hollow structure, and the hollow structure is a reserved soil storage space. During the simulated jacking process, after the sleeve pushes the communication channel model into the soil, the soil in the communication channel model can enter the reserved hollow structure to prevent soil accumulation, resulting in excessive local stress and stress concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0031] Figure 1 It is a structural diagram of a model box in a test device for simulating the construction of a communication channel by a pipe jacking method disclosed in the present invention;

[0032] Figure 2 It is a structural diagram of a support device in a test device for simulating the construction of a communication channel by a pipe jacking method disclosed in the present invention;

[0033] Figure 3 It is a structural diagram of a jacking device with a circular sleeve installed in a test device for simulating the construction of a communication channel jacking method disclosed in the present invention;

[0034] Figure 4 It is a structural diagram of a jacking device with a square sleeve installed in a test device for simulating the construction of a communication channel jacking method disclosed in the present invention;

[0035] Figure 5 It is a structural diagram of a main tunnel model and a communication channel model in a test device for simulating the construction of a communication channel by pipe jacking method disclosed in the present invention;

[0036] Figure 6 for Figure 5 A three-dimensional image of the main tunnel model segment at center A;

[0037] Figure 7 for Figure 5 Structural diagram of the main tunnel model segment at A in the middle;

[0038] Figure 8 for Figure 5 A three-dimensional diagram of the assembly and connection of the main tunnel model segments at A in the middle;

[0039] Fig. 9 for Figure 5 Structural diagram of the assembly and connection of the main tunnel model segments at A in the middle;

[0040] Fig.10 A structural diagram of the main tunnel model segment splicing in the test device for simulating the construction of the connecting channel by the pipe jacking method disclosed in the present invention

[0041] Reference numerals:

[0042] Label name Label name 1 Model Box 41 Support plate 11 Bezel 42 Support column 12 Connectors 51 Horizontal fixing plate 13 Hook 52 Horizontal moving plate 14 pulley 53 Horizontal support rod 2 Main Tunnel Model 54 First flange 21 Through Hole 61 Vertical fixing plate 22 Capping block 62 Vertical moving plate 23 Lining Block 63 Vertical support rod 24 Standard Block 71 Push drive 25 Connection Block 72 Sleeve 3 Communication channel model 73 Push support seat 4 Support body

[0043] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, unless otherwise clearly defined, the words such as setting, installing, connecting, etc. should be understood in a broad sense, and the technical personnel in the relevant technical field can reasonably determine the specific meaning of the above words in the present invention in combination with the specific content of the technical solution. In the description of the present invention, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] Embodiment 1:

[0047] See also Figure 1-10 According to the first embodiment of the present invention, the test device for simulating the construction of the connecting channel by the pipe jacking method comprises a model box 1, a main tunnel model 2 and a connecting channel model 3, wherein the main tunnel model 2 is arranged in the model box 1, a through hole 21 is arranged on one side of the main tunnel model 2, the connecting channel model 3 is located in the main tunnel model 2, and soil is filled between the model box 1 and the main tunnel model 2;

[0048] The main tunnel model 2 is provided with a supporting device, a pushing device and a detection device;

[0049] The support device comprises a support body 4, a horizontal support assembly for applying a horizontal pre-support force to the main tunnel model, and a vertical support assembly for applying a vertical pre-support force to the main tunnel model, wherein the horizontal support assembly and the vertical support assembly are independently arranged on the support body 4;

[0050] One end of the pushing device is connected to the horizontal support assembly, and the other end is used to push the communication channel model 3 into the soil through the through hole 21. The detection device is used to detect the strain and stress of the main tunnel model 2 in real time.

[0051] Specifically, the main tunnel model 2 and the connecting channel model 3 are placed in the model box 1, and a detection device is set at the position where the main tunnel model 2 is subjected to the pre-support force and the jacking force to monitor the strain and stress data of the main tunnel segment; the gaps between the main tunnel model 2 and the model box 1, and between the connecting channel model 3 and the model box 1 are filled with soil; the simulation of the jacking method construction process is started, the horizontal support component is started to apply a horizontal pre-support force to the main tunnel model 2, the vertical support component is started to apply a vertical pre-support force to the main tunnel model 2, and then the jacking device is started to jack the connecting channel model 3 into the soil through the through hole 21. When simulating the jacking method construction process, the detection device detects the strain and stress of the main tunnel model 2 in real time, so as to carry out experiments simulating the jacking method construction of the connecting channel, and study the effects of different jacking forces, different horizontal and vertical pre-support forces on the main tunnel structure.

[0052] In the present invention, the horizontal support assembly and the vertical support assembly are used to apply horizontal pre-support force and horizontal pre-support force in the horizontal direction and vertical direction respectively. The horizontal support assembly and the vertical support assembly are independently arranged on the support body 4, and the horizontal pre-support force and the vertical pre-support force can be controlled separately, so that the applied pre-support force is concentrated, and the horizontal pre-support force and the horizontal pre-support force will not affect each other. According to the different soil pressures in the horizontal and vertical directions during actual construction, it can better simulate the pre-support force borne by the main tunnel segment in the actual project in the horizontal and vertical directions.

[0053] One end of the jacking device is connected to the horizontal support assembly. When the jacking device pushes the connecting channel model 3, the jacking force applied acts on the horizontal support assembly, which can avoid the stress concentration caused by the jacking force directly acting on the main tunnel model 2 and reduce the damage to the pipe segment of the main tunnel model 2. The test device for simulating the jacking construction of the connecting channel also includes a control system, and the jacking device, the horizontal support assembly, and the vertical support assembly are all electrically connected to the control system.

[0054] See also Figure 3 and 4In some embodiments of the present invention, the pushing device includes a pushing drive member 71 and a sleeve 72, one end of the pushing drive member 71 is connected to the horizontal support assembly, and the other end is detachably connected to the sleeve 72.

[0055] The push drive 71 applies a push force to the horizontal support assembly and provides a reaction force to the sleeve 72. The connecting channel segment is pushed forward under the push action of the sleeve 72. The removable sleeve 72 can adjust its shape according to the connecting channel model 3 with different cross sections, and push the connecting channel model 3 with different cross sections. The push drive 71 is connected to the sleeve 72 by bolts to facilitate installation and disassembly, such as installing connecting channels with standard circular cross sections, large circular cross sections, rectangular cross sections, etc. The push device also includes a push support seat 73 arranged on the support plate 41 below the support body 4, which is used to support the push drive 71. The push drive is a hydraulic telescopic device.

[0056] See also Figure 3 and 4 In some embodiments of the present invention, the sleeve 72 is a hollow structure, and the hollow structure is a reserved soil storage space. During the simulated pushing process, after the sleeve 72 pushes the communication channel model 3 into the soil, the soil in the communication channel model 3 can enter the reserved hollow structure to prevent soil accumulation, resulting in excessive local stress and stress concentration.

[0057] See also Figure 2 In some embodiments of the present invention, the horizontal support assembly includes a horizontal support rod 53 arranged on the support body 4, a horizontal fixed plate 51 and a horizontal movable plate 52 respectively arranged at both ends of the horizontal support rod 53, a horizontal driving member for driving the horizontal movable plate 52 to move is provided between the horizontal support rod 53 and the horizontal movable plate 52, and the pushing device is connected to the horizontal fixed plate 51.

[0058] One end of the pushing device is connected to the horizontal fixing plate 51, which can avoid stress concentration on the main tunnel model 2 when the pushing device pushes the connecting channel model 3, thereby reducing damage to the pipe segment.

[0059] See also Figure 2 In some embodiments of the present invention, the horizontal driving member is a hydraulic telescopic device.

[0060] In this embodiment, the support body 4 includes two support plates 41 arranged opposite to each other, and the two support plates 41 are connected by four support columns 42, and the four support columns 42 are arranged near the four corners of the support plates 41. The horizontal support assembly includes four horizontal support rods 53 arranged in parallel, and two horizontal support rods 53 and two support columns 42 on the same vertical plane form a group to form a tic-tac-toe structure, that is, the two horizontal support rods 53 in the same group both penetrate the two support columns 42 and are arranged on the two support columns 42, and two groups are arranged in total.

[0061] One end of the four horizontal support rods 53 is connected to the horizontal fixed plate 51, and the other end is connected to the horizontal movable plate 52. Each horizontal support rod 53 is provided with a horizontal driving member at one end adjacent to the horizontal movable plate 52. The horizontal driving member is electrically connected to the control system. The four horizontal driving members are uniformly pushed and controlled by the control system, and apply horizontal pre-support force to the main tunnel model 2 through the horizontal fixed plate 51 or the horizontal movable plate 52, so that the horizontal pre-support force can be applied more evenly, thereby preventing certain damage to the pipe segments of the main tunnel model 2 due to uneven application of force.

[0062] The horizontal driving member is a hydraulic telescopic device. Compared with the use of a jack to apply horizontal pre-support force, both ends of the horizontal driving member are connected to the horizontal support rod 53 or the horizontal movable plate 52 using a first flange 54, which is convenient for the installation and fixation of the horizontal driving member and can be easily disassembled. The horizontal support rod 53 can penetrate the horizontal direction to form a "two-force rod" structure, so that the force in the horizontal direction is the same.

[0063] See also Figure 2 In some embodiments of the present invention, the horizontal support components are respectively arranged on both sides of the pushing device.

[0064] See also Figure 2 In some embodiments of the present invention, the vertical support assembly includes a vertical support rod 63 arranged on the support body 4, a vertical fixed plate 61 and a vertical movable plate 62 respectively arranged at both ends of the vertical support rod 63, and a vertical driving member for driving the vertical movable plate 62 to move is provided between the vertical support rod 63 and the vertical movable plate 62.

[0065] In this embodiment, the vertical support assembly includes four vertical support rods 63 arranged in parallel, and the four vertical support rods 63 all penetrate the two support plates 41 and are arranged on the two support plates 41. One end of the four vertical support rods 63 is connected to the vertical fixed plate 61, and the other end is connected to the vertical movable plate 62. Each vertical support rod 63 is provided with a vertical driving member at one end adjacent to the vertical movable plate 62, and the vertical driving member is electrically connected to the control system. The four vertical driving members are uniformly pushed and controlled by the control system, and all apply vertical pre-support force to the main tunnel model 2 through the vertical fixed plate 61 or the vertical movable plate 62, so that the vertical pre-support force can be applied more evenly, and the pipe segment of the main tunnel model 2 can be prevented from being damaged to a certain extent due to uneven application of force.

[0066] The vertical drive member is a hydraulic telescopic device. Compared with the use of a jack to apply vertical pre-support force, both ends of the vertical drive member are connected to the vertical support rod 63 or the vertical movable plate 62 with a second flange, which is convenient for the installation and fixation of the vertical drive member and can be easily disassembled and assembled. The vertical support rod 63 can penetrate the vertical direction to form a "two-force rod" structure, so that the force in the vertical direction is the same.

[0067] In some embodiments of the present invention, the vertical support assembly includes a vertical support rod 63 arranged on the support body 4, and vertical movable plates 62 respectively arranged at both ends of the vertical support rod 63, and the vertical support rod 63 is provided with a vertical driving member for driving the vertical movable plate 62 to move.

[0068] The vertical support assembly includes four vertical support rods 63 arranged in parallel, and the four vertical support rods 63 all penetrate the two support plates 41 and are arranged on the two support plates 41. Both ends of the four vertical support rods 63 are connected to the vertical movable plates 62, and both ends of each vertical support rod 63 are provided with vertical driving members to drive the vertical movable plates 62 at both ends thereof, or each vertical support rod 63 is provided with a vertical driving member for driving the vertical movable plates 62 arranged at both ends thereof.

[0069] The vertical driving member is electrically connected to the control system, and the 4 or 8 vertical driving members are uniformly pushed and controlled by the control system, and all apply vertical pre-support force to the main tunnel model 2 through the vertical movable plate 62, so that the vertical pre-support force can be applied more evenly, preventing certain damage to the pipe segments of the main tunnel model 2 due to uneven application of force.

[0070] In this embodiment, the jacking drive 71, the horizontal drive and the vertical drive are all equipped with high-precision sensors, which can sense the magnitude of the jacking force, the horizontal pre-support force or the vertical pre-support force in real time and display it through a digital display, so that data can be read at any time and the magnitude can be controlled and adjusted at any time. The jacking drive 71, the horizontal drive and the vertical drive are flexibly selected according to the jacking distance and the power provided.

[0071] See also Figure 2 In some embodiments of the present invention, the detection device includes a pressure sensor and a stress sheet arranged on the main tunnel model 2.

[0072] In this embodiment, the pressure sensor and the stress sheet are arranged at the position where the main tunnel model 2 contacts the horizontal support assembly / vertical support assembly, so as to observe the changes in strain and stress data of the pipe segment of the main tunnel model 2. The horizontal fixed plate 51, the horizontal movable plate 52, the vertical fixed plate 61 and the vertical movable plate 62 are all provided with small holes for the pressure sensor and the stress sheet detection end to pass through, so as to facilitate the pressure sensor and the stress sheet detection end to be installed on the pipe segment of the main tunnel model 2 through the small holes.

[0073] In this embodiment, the test device is designed and simulated in a scaled-down manner of 1:6.875, and the segments of the main tunnel model 2 and the connecting channel model 3 are designed. The segments used are mainly divided into reinforced concrete segments and reinforced concrete composite segments. Among them, reinforced concrete segments are the most commonly used segments in the jacking method. It is composed of steel and concrete and has excellent strength and durability. Reinforced concrete composite segments have excellent strength and stability and are suitable for areas with complex geological conditions. The main tunnel model 2 uses reinforced concrete segments, and the T-joint part between the main tunnel model 2 and the connecting channel model 3 uses reinforced concrete composite segments, see Figure 5 Point A in the middle is the T-joint between the main tunnel model 2 and the connecting channel model 3.

[0074] In this embodiment, see Figure 1 The length of the model box 1 along the main tunnel segment direction is 7m, the length of the model box 1 along the jacking connecting channel direction is 4m, the model box 1 is 4m high, the model box 1 is made of steel along the jacking direction, the other two sides are transparent acrylic plates, and the bottom is made of steel. The side walls of the model box 1 are connected by a connector 12 to fix the side walls of the model box 1. A hook 13 is provided on the model box 1. When the model box 1 needs to be moved, the hook 13 can be hooked with a chain to move it. A pulley 14 is provided at the bottom of the model box 1. When the model box 1 needs to be moved a short distance, the box body can be pushed and moved under the action of the pulley 14. A baffle 11 is provided on one side of the model box 1, which can be fixed on a horizontal plane to limit the position of the model box 1.

[0075] In this embodiment, see Fig.10 , which is a schematic diagram of the pipe segment of the main tunnel model 2. This is a ring of pipe segments of the main tunnel model 2. Different ring segments are assembled with staggered joints. Each ring segment is divided into six splicing blocks, including 1 capping block 22, 2 lining blocks 23, and 3 standard blocks 24, which can ensure the stability and integrity of the structure and restore the actual working conditions to the greatest extent.

[0076] See also Figure 6 and 7, This figure is a schematic diagram of the T-joint of the main tunnel model 2 and the connecting channel model 3. There are a total of 6 segments, all of which are reinforced concrete composite segments, that is, the segments are made of steel structure, reinforced inside, and cast with concrete to ensure the mechanical properties of the segment structure.

[0077] See also Figure 8 and 9 The figure is a schematic diagram of the assembly and connection of the pipe segments at the T-joint of the main tunnel model 2 and the connecting channel model 3. The pipe segments of different rings of the main tunnel model 2 and the pipe segments of the rings are connected by setting connection blocks 25.

[0078] Embodiment 2:

[0079] See also Figure 1-10 According to the second embodiment of the present invention, the test method for simulating the construction of the connecting channel by pipe jacking method comprises the following steps:

[0080] S1, putting the main tunnel model 2 and the communication channel model 3 into the model box 1;

[0081] S2, setting a detection device on the main tunnel model 2;

[0082] S3, filling soil into the model box 1;

[0083] S4, start the horizontal support assembly and the vertical support assembly to apply horizontal pre-support force and vertical pre-support force to the main tunnel model 2;

[0084] S5, starting the pushing device to push the communication channel model 3 into the soil through the through hole 21;

[0085] S6. The detection device detects the strain and stress of the main tunnel model 2 in real time.

[0086] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A test device for simulating the construction of a connecting channel by pipe jacking method, characterized in that: It includes a model box, a main tunnel model and a communication channel model, wherein the main tunnel model is arranged in the model box, a through hole is arranged on one side of the main tunnel model, the communication channel model is located in the main tunnel model, and soil is filled between the model box and the main tunnel model; A supporting device, a pushing device and a detecting device are provided in the main tunnel model. The supporting device comprises a supporting body, a horizontal supporting assembly for applying a horizontal pre-support force to the main tunnel model, and a vertical supporting assembly for applying a vertical pre-support force to the main tunnel model. The horizontal supporting assembly and the vertical supporting assembly are independently arranged on the supporting body. One end of the pushing device is connected to the horizontal supporting assembly, and the other end is used to push the communication channel model through the through hole into the soil. The detecting device is used to detect the strain and stress of the main tunnel model in real time.

2. The test device for simulating the pipe jacking construction of a communication channel according to claim 1, characterized in that: The pushing device comprises a pushing driving member and a sleeve. One end of the pushing driving member is connected to the horizontal support assembly, and the other end is detachably connected to the sleeve.

3. The test device for simulating the pipe jacking construction of the communication channel according to claim 2 is characterized in that: The sleeve is a hollow structure.

4. The test device for simulating the pipe jacking construction of a communication channel according to claim 1, characterized in that: The horizontal support assembly includes a horizontal support rod arranged on a support body, a horizontal fixed plate and a horizontal movable plate respectively arranged at both ends of the horizontal support rod, a horizontal driving member for driving the horizontal movable plate to move is arranged between the horizontal support rod and the horizontal movable plate, and the pushing device is connected to the horizontal fixed plate.

5. The test device for simulating the pipe jacking construction of a communication channel according to claim 4, characterized in that: The horizontal driving member is a hydraulic telescopic device.

6. The test device for simulating the pipe jacking construction of a communication channel according to claim 1, characterized in that: The horizontal support components are respectively arranged on both sides of the pushing device.

7. The test device for simulating the pipe jacking construction of a communication channel according to any one of claims 1 to 6, characterized in that: The vertical support assembly includes a vertical support rod arranged on a support body, a vertical fixed plate and a vertical movable plate respectively arranged at both ends of the vertical support rod, and a vertical driving member for driving the vertical movable plate to move is arranged between the vertical support rod and the vertical movable plate.

8. The test device for simulating pipe jacking construction of a communication channel according to any one of claims 1 to 6, characterized in that: The vertical support assembly comprises a vertical support rod arranged on a support body, and vertical movable plates respectively arranged at both ends of the vertical support rod. A vertical driving member for driving the vertical movable plate to move is arranged on the vertical support rod.

9. The test device for simulating pipe jacking construction of a communication channel according to any one of claims 1 to 6, characterized in that: The detection device includes a pressure sensor and a stress sheet arranged on the main tunnel model.

10. A test method based on the test device for simulating the pipe jacking construction of a communication channel according to any one of claims 1 to 9, characterized in that: The steps include: S1. Put the main tunnel model and the communication channel model into the model box; S2. Setting a detection device on the main tunnel model; S3, filling the model box with soil; S4, starting the horizontal support assembly and the vertical support assembly to apply horizontal pre-support force and vertical pre-support force to the main tunnel model; S5, starting the pushing device to push the communication channel model into the soil through the through hole; S6. The detection device detects the strain and stress of the main tunnel model in real time.

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