A landslide-tunnel interaction model and test device

Abstract

The invention discloses a landslide body and tunnel interaction model and test device, belonging to the field of landslide body and tunnel interaction test, comprising a model box, a landslide body layered model arranged inside the model box, and a tunnel model inserted into the hole of the landslide body layered model, wherein the landslide body layered model comprises a topsoil layer, a clay layer, a sand layer, a gravel layer and a bedrock layer arranged in sequence from the outside to the inside, and the topsoil layer, the clay layer, the sand layer, the gravel layer and the bedrock layer are respectively mixed with pigments of different colors to cooperate with a high-speed camera arranged outside the model box to monitor interlayer displacement; the hole and the layered landslide body model are arranged orthogonally, parallelly or obliquely. The landslide body and tunnel interaction model and the test device can be used to simulate a real landslide body and the environment in which the landslide body is located, so that the test results are close to the real situation.

Description

Technical Field

[0001] The invention relates to the technical field of landslide body and tunnel interaction test, in particular to a landslide body and tunnel interaction model and a test device. Background Art

[0002] Under complex geological conditions, tunnel construction will inevitably encounter unfavorable geological sections. Generally speaking, tunnels that cross large and complex landslides are usually avoided or changed according to specific geological and local conditions during the survey, site selection, and design stages; or landslide treatment is carried out before tunnel excavation. However, due to the complexity and hidden nature of mountain geological conditions and the uncertainty of landslide disaster time and space, tunnels that cross old landslides often lead to new landslide deformation.

[0003] In order to explore the impact of landslide activities on existing tunnels, model experiments are often used to study the force-deformation relationship of existing tunnels in the lateral and longitudinal directions. Existing model experiments are usually designed based on similarity to reproduce the structural conditions and structural deformation characteristics in indoor and outdoor controlled environments. However, they still have the following defects:

[0004] 1. The existing landslide model is a 3D-printed clay structure, which does not conform to the actual environment, resulting in a large deviation from the actual environment and reducing the reliability of the experimental results;

[0005] 2. Using sensors to collect the displacement of the landslide model destroys the overall structure of the landslide and further reduces the reliability of the experimental results. Summary of the invention

[0006] The purpose of the present invention is to provide a landslide and tunnel interaction model and a test device to solve the above technical problems.

[0007] To achieve the above-mentioned purpose, the present invention provides a landslide body and tunnel interaction model, comprising a model box, a landslide body layered model arranged inside the model box, and a tunnel model inserted into the hole of the landslide body layered model, wherein the landslide body layered model comprises a topsoil layer, a clay layer, a sand layer, a gravel layer, and a bedrock layer arranged in sequence from the outside to the inside, and the topsoil layer, the clay layer, the sand layer, the gravel layer, and the bedrock layer are respectively mixed with pigments of different colors to cooperate with a high-speed camera arranged outside the model box to monitor interlayer displacement;

[0008] The holes and the layered landslide model are arranged orthogonally, parallelly or obliquely.

[0009] Preferably, the landslide body stratification model is obtained based on similarity theory, and the landslide body stratification model satisfies the following physical simulation conditions:

[0010] ;

[0011] In the formula, represents the length similarity ratio; Indicates the actual length of the layered landslide body; represents the model length of the layered landslide body; It represents the similarity ratio of stress; Represents the actual stress of the layered landslide body; Model stress representing the layered landslide body; represents the similarity ratio of strain; Represents the actual strain of the layered landslide body; Represent the model strain of the stratified landslide body; denoting the similarity ratio of Poisson's ratio; represents the actual Poisson's ratio of the stratified landslide body; The model Poisson's ratio representing the layered landslide body; Represents the similarity ratio of elastic modulus; It represents the actual elastic modulus of the layered landslide body; represents the model elastic modulus of the layered landslide body; Similarity ratios expressing mass per unit volume; It represents the actual unit volume mass of the layered landslide body; The model unit volume mass representing the layered landslide body; Similarity ratio representing cohesion; It represents the actual cohesion of the layered landslide body; Represents the model cohesion of the stratified landslide body; Represents the similarity ratio of the internal friction angle; It represents the actual internal friction angle of the layered landslide body; The model internal friction angle representing the layered landslide body;

[0012] At the same time, the landslide layering model meets the following criteria:

[0013] .

[0014] Preferably, the positions of the hole and tunnel models on the landslide body layered model are determined based on the scale.

[0015] Preferably, a water seepage layer is further provided at the bottom of the foundation stone layer, one end of the water seepage layer contacts the water inlet hole provided on the model box, and the other end of the water seepage layer contacts the water outlet hole provided on the model box;

[0016] A plurality of water inlet holes and a plurality of water outlet holes are respectively provided at both ends of the model box, and the plurality of water inlet holes and the plurality of water outlet holes are arranged in a rectangular array, and at least one water inlet hole is connected to the water outlet of the water storage tank through a water inlet pipe, and at least one water outlet hole is connected to the water return port of the water storage tank through a water outlet pipe.

[0017] Preferably, clay slurry is filled between the topsoil layer and the clay layer, fine sand is filled between the clay layer and the sand layer, and the particle size of the fine sand ranges from 0.125 mm to 0.25 mm. A filter cloth is laid between the sand layer and the gravel layer, and cement mortar or epoxy resin is filled between the gravel layer and the bedstone layer.

[0018] The topsoil layer is composed of soil and plant roots and humus mixed in the soil;

[0019] The pigment is a mineral pigment or a biodegradable pigment, and the amount of the pigment added is 0.5% to 1%.

[0020] The test device of the landslide body and tunnel interaction model comprises a landslide body layered laying compaction mechanism, a tunnel insertion mechanism, a hydraulic loading mechanism, a climate simulation mechanism and a monitoring and analysis mechanism arranged on a model box, wherein the landslide body layered laying compaction mechanism comprises a plurality of hoppers erected above the model box, the bottom end of each hopper is connected to one end of a feed pipe, the other end of the feed pipe is fixed to the output end of a first three-axis mobile platform through a collecting pipe, and a bidirectional material conveyor belt is also fixed to the output end of the first three-axis mobile platform, one end of the bidirectional material conveyor belt is aligned with the feed pipe, and the other end is aligned with the model box;

[0021] The bottom end of the bracket of the bidirectional material conveyor belt is rotatably connected to the compacting roller via a compacting component.

[0022] Preferably, the tunnel insertion mechanism includes a walking unit fixed on the model box, a second three-axis mobile platform fixed to the output end of the walking unit, an angle adjustment unit fixed to the output end of the second three-axis mobile platform, and a first mounting ring fixed to the output end of the angle adjustment unit, the first mounting ring being detachably connected to a drilling unit or a tunnel clamping unit, and the first mounting ring facing the direction of the landslide layered model.

[0023] Preferably, the walking unit comprises a guide rail arranged around the top of the interior of the model box and an electric walking trolley arranged to walk on the guide rail, and a second three-axis moving platform is fixed on the electric walking trolley;

[0024] The angle adjustment unit is fixed to the first mounting plate, the horizontal angle adjustment assembly and the pitch angle adjustment assembly at the output end of the second three-axis mobile platform. The horizontal angle adjustment assembly includes a left electric cylinder and a right electric cylinder symmetrically rotatably arranged on the first mounting plate. The piston rods of the left electric cylinder and the right electric cylinder are both rotatably connected to the second mounting ring. At least two electric push rods are arranged between the second mounting ring and the first mounting ring. The two ends of the electric push rods are rotatably connected to the first mounting ring and the second mounting ring respectively.

[0025] The drilling unit includes a drilling reduction motor fixed to the first mounting ring by bolts and a drilling pipe connected to the output end of the drilling reduction motor via a gear, wherein one end of the drilling pipe facing the landslide layering model is provided with cutting teeth, and the other end is connected to the vacuum collection box via a suction pipe;

[0026] The tunnel clamping unit includes a second mounting plate installed on a first mounting ring by bolts, a clamping drive motor arranged on one side of the second mounting plate, and an intermediate connecting rod centrally rotatably arranged on the other side of the second mounting plate and connected to the output end of the clamping drive motor. Both ends of the intermediate connecting rod are rotatably connected to one end of the arc-shaped end connecting rod, and the other end of the arc-shaped end connecting rod is rotatably connected to the clamping head, and the clamping head is also slidably connected to the second mounting plate.

[0027] Preferably, the climate simulation mechanism includes a spray pipe, a blow pipe, a heater and a lighting lamp mounted on the top of the model box;

[0028] The monitoring and analysis mechanism includes a high-speed camera arranged at a layered model of the landslide body and a three-dimensional laser scanner arranged at a tunnel model. Both the high-speed camera and the three-dimensional laser scanner communicate with a host computer equipped with a DIC digital image processing method.

[0029] Preferably, the bottom of one end of the bidirectional material conveyor belt close to the discharge pipe is aligned with the residual material collection box;

[0030] The clamping assembly comprises a telescopic tube fixed to the bottom end of the bidirectional material conveyor belt and a clamping spring sleeved on the outside of the telescopic tube.

[0031] Therefore, the present invention adopts the above-mentioned landslide body and tunnel interaction model and test device, which has the following beneficial effects:

[0032] 1. Accurately simulate actual geological conditions: Based on similarity theory, the model meets specific physical simulation conditions to ensure a high degree of consistency between the model and the actual situation;

[0033] 2. Layered design: The layered model of the landslide body includes topsoil, clay, sand, gravel and bedrock. Each layer is mixed with pigments of different colors to facilitate monitoring of interlayer displacement through high-speed cameras.

[0034] 3. Flexible tunnel layout: The holes and layered landslide models can be arranged orthogonally, parallelly or obliquely to simulate different engineering scenarios;

[0035] 4. Accurate position control: Determine the position of the hole and tunnel model on the landslide layer model based on the scale to ensure the accuracy of the experiment;

[0036] 5. Advanced monitoring technology: 3D laser scanner: non-contact measurement of tunnel surface deformation, providing high-precision deformation data, while combining image processing technology to calculate the displacement and strain of the tunnel surface, providing detailed deformation analysis;

[0037] 6. Comprehensive environmental simulation: using sprinkler pipes, air blowers, heaters and lighting, it can simulate different climatic conditions, such as rainfall, wind erosion, temperature changes, etc., simulate the real environment of the landslide, and further improve the reliability of the test results;

[0038] 7. Seepage layer design: A seepage layer is set at the bottom of the bedrock layer to simulate the flow of groundwater and more realistically reflect the actual geological conditions.

[0039] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of a landslide body and tunnel interaction model of the present invention;

[0041] Figure 2 It is a structural schematic diagram of a test device for a landslide body and tunnel interaction model of the present invention;

[0042] Figure 3 for Figure 2 A in the enlarged view;

[0043] Figure 4 It is a schematic diagram of the installation of a drilling unit of a test device for a landslide body and tunnel interaction model of the present invention;

[0044] Figure 5 The present invention is a schematic diagram of the installation of a tunnel clamping unit of a test device for a landslide body and tunnel interaction model.

[0045] Reference numerals

[0046] 1. Model box; 2. Tunnel model; 3. Landslide layer model; 31. Topsoil layer; 32. Clay layer; 33. Sand layer; 34. Gravel layer; 35. Bedrock layer; 36. Seepage layer; 4. Climate simulation mechanism; 41. Sprinkler pipe; 42. Blowing pipe; 43. Heater; 44. Lighting lamp; 5. Tunnel insertion mechanism; 51. Guide rail; 52. Second three-axis mobile platform; 53. Traveling trolley; 54. Angle adjustment unit; 541. Second mounting ring; 542. Left electric cylinder; 543. Right electric cylinder; 544. Arc end The first connecting rod; 545, the middle connecting rod; 546, the clamping head; 547, the second mounting plate; 548, the clamping drive motor; 549, the electric push rod; 5410, the drilling pipe; 5411, the drilling reduction motor; 55, the first mounting ring; 6, the landslide body layered laying compaction mechanism; 61, the first three-axis mobile platform; 62, the collection pipe; 63, the compaction stick; 64, the two-way material conveyor belt; 65, the residual material collection box; 66, the hopper; 67, the clamping assembly; 7, the monitoring and analysis mechanism; 71, the three-dimensional laser scanner; 72, the high-speed camera. DETAILED DESCRIPTION

[0047] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation", 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 an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0049] like Figure 1As shown, a landslide body and tunnel interaction model includes a model box 1, a landslide body layered model 3 arranged inside the model box 1, and a tunnel model 2 inserted into the hole of the landslide body layered model 3. The landslide body layered model 3 includes a topsoil layer 31, a clay layer 32, a sand layer 33, a gravel layer 34, and a bedrock layer 35 arranged from the outside to the inside. The topsoil layer 31, the clay layer 32, the sand layer 33, the gravel layer 34, and the bedrock layer 35 are respectively mixed with pigments of different colors to cooperate with the high-speed camera 72 arranged outside the model box 1 to monitor the interlayer displacement; the hole and the layered landslide body model are arranged orthogonally, parallelly, or obliquely. Specifically, the landslide body layered model is obtained based on the similarity theory, and the landslide body layered model meets the following physical simulation conditions:

[0050] ;

[0051] In the formula, represents the length similarity ratio; Indicates the actual length of the layered landslide body; represents the model length of the layered landslide body; It represents the similarity ratio of stress; Represents the actual stress of the layered landslide body; Model stress representing the layered landslide body; represents the similarity ratio of strain; Represents the actual strain of the layered landslide body; Represent the model strain of the stratified landslide body; denoting the similarity ratio of Poisson's ratio; represents the actual Poisson's ratio of the stratified landslide body; The model Poisson's ratio representing the layered landslide body; Represents the similarity ratio of elastic modulus; It represents the actual elastic modulus of the layered landslide body; represents the model elastic modulus of the layered landslide body; Similarity ratios expressing mass per unit volume; It represents the actual unit volume mass of the layered landslide body; The model unit volume mass representing the layered landslide body; Similarity ratio representing cohesion; It represents the actual cohesion of the layered landslide body; Represents the model cohesion of the stratified landslide body; Represents the similarity ratio of the internal friction angle; It represents the actual internal friction angle of the layered landslide body; The model internal friction angle representing the layered landslide body;

[0052] At the same time, the landslide layering model meets the following criteria:

[0053] .

[0054] The positions of the holes and the tunnel model 2 on the landslide body layered model 3 are determined based on the scale, and in this embodiment, the tunnel model 2 is formed by 3D printing after mixing gypsum and water in a ratio of 10:8.

[0055] A water seepage layer 36 is also provided at the bottom of the foundation stone layer 35, one end of the water seepage layer 36 is in contact with the water inlet hole opened on the model box 1, and the other end is in contact with the water outlet hole opened on the model box 1; a plurality of water inlet holes and a plurality of water outlet holes are respectively provided at both ends of the model box 1, and the plurality of water inlet holes and the plurality of water outlet holes are arranged in a rectangular array, and at least one water inlet hole is connected to the water outlet of the water storage tank through a water inlet pipe, and at least one water outlet hole is connected to the return water outlet of the water storage tank through a water outlet pipe to simulate underground drainage.

[0056] Clay slurry is filled between the topsoil layer 31 and the clay layer 32, fine sand is filled between the clay layer 32 and the sand layer 33, and the particle size of the fine sand ranges from 0.125mm to 0.25mm. Filter cloth is laid between the sand layer 33 and the gravel layer 34, and cement mortar or epoxy resin is filled between the gravel layer 34 and the bedstone layer 35 to increase the interlayer adhesion; the topsoil layer 31 is composed of soil and plant roots and humus mixed in the soil; the pigment is a mineral pigment or a biodegradable pigment, and the pigment addition amount is 0.5%~1%.

[0057] like Figure 2-Figure 5 As shown, the test device of the landslide body and tunnel interaction model comprises a landslide body layered laying compaction mechanism 6, a tunnel insertion mechanism 5, a hydraulic loading mechanism, a climate simulation mechanism 4 and a monitoring and analysis mechanism 7 arranged on the model box 1, wherein the landslide body layered laying compaction mechanism 6 comprises a plurality of hoppers 66 erected above the model box 1, the bottom end of each hopper is connected to one end of a feed pipe, the other end of the feed pipe is fixed to the output end of the first three-axis mobile platform 61 through a collection pipe 62, and a bidirectional material conveyor belt 64 is also fixed to the output end of the first three-axis mobile platform 61, one end of the bidirectional material conveyor belt 64 is aligned with the feed pipe, and the other end is aligned with the model box 1; the bottom end of the bracket of the bidirectional material conveyor belt 64 is rotatably connected to the compaction roller 63 through a clamping assembly 67. A feed valve is arranged on the feed pipe in this embodiment to control the feed speed through the feed valve, thereby controlling the thickness of the paving material. In this embodiment, six hoppers 66 are included, and materials used for the topsoil layer 31, clay layer 32, sand layer 33, gravel layer 34, bedrock layer 35 and permeable layer 36 are respectively stored in the six hoppers 66. The bidirectional material conveyor belt 64 is driven by a three-phase asynchronous motor, so as to control the bidirectional material conveyor belt 64 to switch and convey materials in both directions.

[0058] The tunnel insertion mechanism 5 includes a walking unit fixed on the model box 1, a second three-axis mobile platform 52 fixed to the output end of the walking unit, an angle adjustment unit 54 fixed to the output end of the second three-axis mobile platform 52, and a first mounting ring 55 fixed to the output end of the angle adjustment unit 54. A drilling unit or a tunnel clamping unit is detachably connected to the first mounting ring 55, and the first mounting ring 55 is facing the direction of the landslide body layered model 3.

[0059] The walking unit includes a guide rail 51 arranged around the top of the inner part of the model box 1 and an electric walking trolley 53 arranged to walk on the guide rail 51, and a second three-axis mobile platform 52 is fixed on the electric walking trolley 53; the angle adjustment unit 54 is fixed to the first mounting plate, the horizontal angle adjustment component and the pitch angle adjustment component at the output end of the second three-axis mobile platform 52, and the horizontal angle adjustment component includes a left electric cylinder 542 and a right electric cylinder 543 symmetrically arranged on the first mounting plate, and the piston rods of the left electric cylinder 542 and the right electric cylinder 543 are both rotatably connected to the second mounting ring 541, and at least two electric push rods 549 are arranged between the second mounting ring 541 and the first mounting ring 55, and the two ends of the electric push rod 549 are rotatably connected to the first mounting ring 55 and the second mounting ring 541 respectively; the drilling unit includes a first mounting ring 55 and a second mounting ring 541 through a bolt. A drilling reduction motor 5411 fixed on the first mounting ring 55 and a drilling tube 5410 connected to the output end of the drilling reduction motor 5411 via a gear, wherein one end of the drilling tube 5410 facing the landslide stratification model is provided with cutting teeth, and the other end is connected to the vacuum collection box via a suction pipe; the tunnel clamping unit includes a second mounting plate 547 mounted on the first mounting ring 55 via bolts, a clamping drive motor 548 arranged on one side of the second mounting plate 547, and an intermediate connecting rod 545 centrally rotatably arranged on the other side of the second mounting plate 547 and connected to the output end of the clamping drive motor 548, both ends of the intermediate connecting rod 545 are rotatably connected to one end of the arc-shaped end connecting rod 544, and the other end of the arc-shaped end connecting rod 544 is rotatably connected to the clamping head 546, and the clamping head 546 is also slidably connected to the second mounting plate 547.

[0060] The climate simulation mechanism 4 includes a spray pipe 41, a blow pipe 42, a heater 43 and a lighting lamp 44 mounted on the top of the model box 1; the monitoring and analysis mechanism 7 includes a high-speed camera 72 arranged at the landslide layered model 3 and a three-dimensional laser scanner 71 arranged at the tunnel model 2. The high-speed camera 72 and the three-dimensional laser scanner 71 both communicate with a host computer equipped with a DIC digital image processing method.

[0061] The bottom of one end of the bidirectional material conveyor belt 64 close to the discharge pipe is aligned with the residual material collection box 65; the clamping assembly 67 includes a telescopic tube fixed to the bottom end of the bidirectional material conveyor belt 64 and a clamping spring sleeved on the outside of the telescopic tube.

[0062] The test steps are as follows: S1, based on the scale and the landslide layer model 3, determine the thickness and length of each layer, as well as the location of the holes and the size of the tunnel model 2; S2, use 3D printing technology to prepare the tunnel model 2; S3, lower the Z-axis height of the first three-axis mobile platform 61, so that the compaction rod 63 is close to the bottom of the model box 1, open the discharge valve of the hopper 66 storing the water seepage layer 36, the first three-axis mobile platform 61 and the two-way material conveyor belt 64, the water seepage layer 36 material stored in the hopper 66 falls onto the two-way material conveyor belt 64 through the discharge pipe and the collection pipe 62, and the two-way material conveyor belt 64 cooperates with the first three-axis mobile platform 61 (with the help of the X-axis and Y-axis of the first three-axis mobile platform 61) to form a tunnel model 2; S4, the tunnel model 2 is prepared by using the 3D printing technology; S5, the tunnel model 2 is prepared by using the 3D printing technology; S6, the tunnel model 2 is prepared by using the 3D printing technology; S7, the tunnel model 2 is prepared by using the 3D printing technology; S8, the tunnel model 2 is prepared by using the 3D printing technology; S9, the tunnel model 2 is prepared by using the 3D printing technology; Drive the bidirectional material conveyor belt 64 to move in a Z shape, and lay the water seepage layer 36 during the movement) lay the water seepage layer 36 to the bottom end of the model box 1. At the same time, the compaction roller 63 at the bottom end of the bidirectional material conveyor belt 64 is compacted synchronously. After the water seepage layer 36 is laid, close the unloading valve on the water seepage layer 36 silo, control the bidirectional material conveyor belt 64 to rotate in the opposite direction, so that the residual material on the bidirectional material conveyor belt 64 is collected into the residual material collection box 65; S4, adjust the Z-axis height of the first three-axis mobile platform 61 upward until the set height of the water seepage layer 36, and open the unloading valve of the hopper 66 containing the bedstone layer 35, gravel layer 34, sand layer 33, clay layer 32 and topsoil layer 31 in turn, and repeat Step S3, carry out layered laying and compaction until the landslide body layered model 3 is prepared; S5, drilling: first install the drilling unit on the first mounting ring 55, and then turn on the electric walking trolley 53 according to the drilling position, the electric walking trolley 53 drives the drilling unit to a position close to the drilling hole, turn off the electric walking trolley 53, turn on the second three-axis mobile platform 52, further adjust the position of the drilling unit, and then turn on the horizontal angle adjustment component and the pitch angle adjustment component in turn, adjust the drilling direction, until the center line of the drilling tube 5410 coincides with the set center line, turn on the drilling reduction motor 5411, and cooperate with the second three-axis mobile platform 52 to drill a hole on the landslide body layered model 3, and then The drilled waste is collected into a vacuum collection box until the drilling is completed and then exited; S6, the drilling unit is removed, the tunnel clamping unit is installed, and the clamping drive motor 548 is opened. The clamping drive motor 548 drives the central connecting rod to rotate, opens the arc-shaped end connecting rod 544, and then drives the two clamping heads 546 to move in the opposite direction until the two clamping heads 546 abut against the inner wall of the tunnel model 2, and then the tunnel model 2 is inserted into the hole by using the second three-axis mobile platform 52, and the clamping drive motor 548 is controlled to rotate in the opposite direction, and the tunnel model 2 is released, and the tunnel clamping unit is reset; S7, the high-speed camera 72 and the three-dimensional laser scanner 71 respectively collect the initial images of the landslide layered model 3 and the tunnel model 2;S8, using the spray pipe 41, the blow pipe 42, the heater 43 and the lighting lamp 44 to simulate different climatic conditions respectively, and using the hydraulic loading mechanism to load the top of the landslide layered model 3, and in the loading process, using the high-speed camera 72 and the three-dimensional laser scanner 71 to regularly collect images of the landslide layered model 3 and the tunnel model 2, and upload the collected images to the host computer, and the host computer uses the DIC digital image processing method to analyze stress and strain. ;

[0063] It should be noted that in the above steps S3 and S4, after each layer is laid, the unloading valve is closed, the bidirectional material conveyor belt 64 is controlled to rotate in the opposite direction, and the residual material is discharged into the vacuum collection box before laying the next layer to avoid mixing of materials between layers.

[0064] It should also be noted that the DIC digital image processing method and the hydraulic loading mechanism are both mature technologies on the market and are not the invention points of this application, so their structural principles will not be described in detail here.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A test device for a landslide-tunnel interaction model, characterized in that: It includes a landslide body layered laying compaction mechanism, a tunnel insertion mechanism, a hydraulic loading mechanism, a climate simulation mechanism and a monitoring and analysis mechanism arranged on the model box, wherein the landslide body layered laying compaction mechanism includes a plurality of hoppers erected above the model box, the bottom end of each hopper is connected to one end of a feed pipe, the other end of the feed pipe is fixed to the output end of the first three-axis mobile platform through a collecting pipe, and a bidirectional material conveyor belt is also fixed to the output end of the first three-axis mobile platform, one end of the bidirectional material conveyor belt is aligned with the feed pipe, and the other end is aligned with the model box; The bottom end of the bracket of the bidirectional material conveyor belt is rotatably connected to the compaction roller via a compaction assembly; The tunnel insertion mechanism includes a walking unit fixed on the model box, a second three-axis mobile platform fixed to the output end of the walking unit, an angle adjustment unit fixed to the output end of the second three-axis mobile platform, and a first mounting ring fixed to the output end of the angle adjustment unit. A drilling unit or a tunnel clamping unit is detachably connected to the first mounting ring, and the first mounting ring faces the direction of the landslide layered model.

2. The test device for the landslide-tunnel interaction model according to claim 1, characterized in that: The walking unit includes a guide rail arranged around the top of the inner part of the model box and an electric walking trolley arranged to walk on the guide rail, and a second three-axis moving platform is fixed on the electric walking trolley; The angle adjustment unit is fixed to the first mounting plate, the horizontal angle adjustment assembly and the pitch angle adjustment assembly at the output end of the second three-axis mobile platform. The horizontal angle adjustment assembly includes a left electric cylinder and a right electric cylinder symmetrically rotatably arranged on the first mounting plate. The piston rods of the left electric cylinder and the right electric cylinder are both rotatably connected to the second mounting ring. At least two electric push rods are arranged between the second mounting ring and the first mounting ring. The two ends of the electric push rods are rotatably connected to the first mounting ring and the second mounting ring respectively. The drilling unit includes a drilling reduction motor fixed to the first mounting ring by bolts and a drilling pipe connected to the output end of the drilling reduction motor via a gear, wherein one end of the drilling pipe facing the landslide layering model is provided with cutting teeth, and the other end is connected to the vacuum collection box via a suction pipe; The tunnel clamping unit includes a second mounting plate installed on a first mounting ring by bolts, a clamping drive motor arranged on one side of the second mounting plate, and an intermediate connecting rod centrally rotatably arranged on the other side of the second mounting plate and connected to the output end of the clamping drive motor. Both ends of the intermediate connecting rod are rotatably connected to one end of the arc-shaped end connecting rod, and the other end of the arc-shaped end connecting rod is rotatably connected to the clamping head, and the clamping head is also slidably connected to the second mounting plate.

3. The test device for the landslide-tunnel interaction model according to claim 1, characterized in that: The climate simulation mechanism includes a spray pipe, a blow pipe, a heater and a lighting lamp mounted on the top of the model box; The monitoring and analysis mechanism includes a high-speed camera arranged at a layered model of the landslide body and a three-dimensional laser scanner arranged at a tunnel model. Both the high-speed camera and the three-dimensional laser scanner communicate with a host computer equipped with a DIC digital image processing method.

4. The test device for the landslide-tunnel interaction model according to claim 1, characterized in that: The bottom of one end of the bidirectional material conveyor belt close to the discharge pipe is aligned with the residual material collection box; The clamping assembly comprises a telescopic tube fixed to the bottom end of the bidirectional material conveyor belt and a clamping spring sleeved on the outside of the telescopic tube.

Images