Simulation test device and method for shield hob cutting fault fracture zone

Abstract

The invention discloses a simulation test device and method for cutting a fault fracture zone by a shield hob, solves the problem that the safety of shield construction on the fault fracture zone is not given in the prior art, and has the beneficial effect of better understanding the interaction between a hob body and rock in the fault fracture zone. According to the specific scheme, the simulation test device comprises a simulation box body, the simulation box body comprises multiple sections, every two adjacent sections are detachably connected, a reserved opening is formed in the end of the simulation box body, a baffle is arranged in the simulation box body, the baffle is obliquely arranged relative to the bottom of the simulation box body, and the baffle can be pulled out relative to the simulation box body; a plurality of holes are reserved in the baffle plates for insertion of forming pipes, concrete is poured between the baffle plates and the end side of the simulation box body, and fault fracture zone filling stones are filled between partial or all adjacent baffle plates to form a fault fracture zone; and the shield tunneling machine simulation device is provided with a hob body, and the hob body is provided with a detection assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shield tunnel construction, and in particular to a simulation test device and method for cutting a fault fracture zone by a shield cutter. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute the prior art.

[0003] The fault fracture zone mainly composed of tensional normal faults has a lithology mainly of breccia, is angular, has a large difference in size of blocks, is arranged in disorder, has many intergranular voids, and is mostly argillaceous cementation. When a tunnel is excavated to this type of fracture zone, collapse is extremely easy to occur. The fault fracture zone mainly composed of compressional reverse faults has a lithology mainly of mudstone and mylonite, is lenticular and rumpled structure, and has serious rock fracture but is tightly cemented. Compared with the fault fracture zone formed by the tensional normal faults, the stability of the fault fracture zone is better, and the difficulty of causing collapse is slightly greater. The fault fracture zone mainly composed of torsional translational faults has a relatively small fracture thickness, and has a lithology mainly of mylonite and fractured rock, which is the most difficult type of fracture zone to cause collapse.

[0004] The fault fracture zone is one of the key factors causing the construction disaster of a shield tunnel. The various forms, complex lithology, and high permeability of the fault fracture zone all easily lead to tunnel gushing, collapse, and other construction disasters, bringing great challenges to safe and efficient tunneling. The formation mechanism of the fault fracture zone is summarized and analyzed, including the formation cause of the fracture zone stratum, the rock mass property of the fracture zone stratum, and the internal relationship between the same and the safety of shield construction. In tunnel engineering, a shield machine is a commonly used construction equipment. However, when passing through the fault fracture zone, the efficiency and safety of the rock cutting by the cutter of the shield machine are seriously affected. Therefore, it is said that there is a lack of a test device capable of simulating the process of cutting the fault fracture zone by the shield cutter in the prior art. SUMMARY

[0005] In view of the deficiencies in the prior art, the purpose of the present application is to provide a simulation test device for cutting a fault fracture zone by a shield cutter, which can more accurately control the strength of the rock in the transition area between the surrounding rock and the fracture zone, so as to better understand the interaction between the cutter and the rock, and optimize the design of the cutter and the construction scheme.

[0006] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme: A simulation test device for cutting a fault fracture zone by a shield cutter, comprising: The simulation box comprises multiple sections, adjacent two sections are detachably connected, the end of the simulation box is provided with a reserved opening, a baffle is arranged in the simulation box, the baffle is arranged obliquely relative to the bottom of the simulation box, the baffle is extractable relative to the simulation box, the baffle is provided with a plurality of holes for inserting a formed pipe, the baffle and the end side of the simulation box are used for pouring concrete, part or all of adjacent two baffles are filled with fault fracture zone filling stones to form a fault fracture zone. The shield machine simulation device has a cutter body, a detection assembly is arranged at the cutter body, and the shield machine simulation device can enter the inside of the simulation box through the reserved opening of the simulation box. The power source of the cutter body and the detection assembly are connected with the control terminal.

[0007] The bottom of the baffle is hingedly connected with the simulation box, the baffle is arranged obliquely towards the outer end side of the simulation box, and the oblique angle of the baffle relative to the bottom of the simulation box is adjustable. A first sealing member is arranged on the side of the baffle.

[0008] The two sides of the baffle are respectively provided with telescopic assemblies, the fixed end of the telescopic assembly is hingedly connected with the baffle, and the movable end of the telescopic assembly is hingedly connected with the side wall of the simulation box.

[0009] The adjacent two sections of the simulation box are sealingly connected. A mounting seat is arranged on the bottom of the simulation box, the mounting seat is arranged close to the connection between the adjacent two sections of the simulation box, the mounting seat is provided with a clamping groove, and one side of the baffle is rotatably installed in the clamping groove.

[0010] The simulation box comprises three U-shaped plates, the side surfaces of the U-shaped plates are connected through hinges and buckles, the widths of the U-shaped plates are the same or different, adjacent two U-shaped plates are detachably connected through buckle structures, or the side edges of adjacent two U-shaped plates are provided with lugs so that the side edges of adjacent two U-shaped plates are detachably connected through fasteners. The outer end of the most side U-shaped plate in the simulation box is provided with a U-shaped groove, and an end plate is clamped into the U-shaped groove.

[0011] The simulation box comprises three U-shaped plates, the side surfaces of the U-shaped plates are connected through hinges and buckles, the widths of the U-shaped plates are the same or different, adjacent two U-shaped plates are detachably connected through buckle structures, or the side edges of adjacent two U-shaped plates are provided with lugs so that the side edges of adjacent two U-shaped plates are detachably connected through fasteners. A slide rail assembly is installed above the simulation chamber. The slide rail assembly supports the filling assembly and moves the filling assembly to the exit end of the 3D printer to receive the fault fracture zone filling stone and place the fault fracture zone filling stone between two adjacent baffles in the simulation chamber.

[0012] The simulation test device for shield tunnel cutter cutting fault fracture zone as described above, wherein the filling component includes a filling box, a gate valve is provided at the bottom of the filling box, and the gate valve is connected to the control terminal; The slide rail assembly includes a support frame that supports a multi-directional motion mechanism. The support frame spans the simulated box and connects the multi-directional motion mechanism to the filling assembly.

[0013] The simulation test device for shield tunnel cutter cutting fault fracture zone as described above, wherein the power source of the cutter body includes a linear drive mechanism, the linear drive mechanism is connected to a rotary motor, and the rotary motor is connected to the cutter body; The detection component includes a distance sensor, which is located on the front side of the cutter body and is connected to the lifting mechanism. The detection assembly also includes a pressure sensor, which is mounted on the cutter body.

[0014] As described above, a simulation test device for cutting fault fracture zones using a shield tunnel cutterhead is provided. Inside the shield tunneling machine simulation device, a soil chamber is set behind the cutterhead body, a conveyor belt is set on one side of the soil chamber, the conveyor belt is set at an upward inclination, and a muck box is set below the output end of the conveyor belt.

[0015] Secondly, the present invention also provides a simulation test method for shield tunnel cutterhead cutting fault fracture zone, employing the aforementioned simulation test device for shield tunnel cutterhead cutting fault fracture zone, comprising the following: The two adjacent sections of the simulation box are assembled to form the simulation box. A baffle is set inside the simulation box, and the baffle is set at an angle relative to the bottom of the simulation box. Insert the molding tube into the pre-drilled hole in the baffle, and pour concrete between the baffle and the end of the simulation box. After the concrete has set, the corresponding section of the simulated box is removed. After the concrete has solidified, the baffle is pulled outward relative to the simulated box, and the forming tube is pulled out to create a pore in the concrete. Filling stones in the fault fracture zone are inserted between some or all of the adjacent baffles to form a transition zone in the fault fracture zone that is cracked but not completely broken. The tunnel boring machine simulation device enters through the reserved opening in the simulation box, the cutter head starts working, and the detection component acquires relevant data and sends it to the control terminal.

[0016] The beneficial effects of the present invention are as follows: 1) In this invention, the simulated box includes multiple sections, with adjacent sections being detachably connected. A baffle is installed in the simulated box, and the baffle is inclined to simulate the inclination of the fault fracture zone. Holes are provided in the baffle to insert forming tubes. Thus, when concrete is poured between the end side of the simulated box and the baffle, a structure similar to the surrounding rock is formed. After the concrete solidifies, the corresponding section of the simulated box can be removed, forming a pore. Finally, after filling the fault fracture zone with filler stone, a transition zone with cracks but not completely broken fault fracture zone is formed. Excavation work is carried out through a shield tunneling machine simulation device. With the addition of detection components, the stability and safety of the fault fracture zone during shield tunneling are studied, and the interaction between the cutter body and the rock in the fault fracture zone is better understood, which is beneficial for optimizing the cutter design and construction scheme.

[0017] 2) In this invention, the baffle is reasonably set up. The bottom of the baffle can be rotatably installed in the slot of the mounting base. The baffle is connected to the side wall of the simulation box through a telescopic component. In this way, the tilt angle of the baffle relative to the simulation box can be changed to simulate fault fracture zones with different tilt angles.

[0018] 3) The simulated box in this invention includes three U-shaped plates. The sides of the U-shaped plates are connected by hinges and latches. Adjacent U-shaped plates are detachably connected by a snap-fit ​​structure or fasteners, which facilitates the pouring of side concrete. After the pouring is completed, it is easy to open and remove the side U-shaped plates. After the fault fracture zone is filled with filling stone, it is also easy to remove the middle U-shaped plate. The width of the U-shaped plates is the same or different to simulate the working conditions of different widths of the fault fracture zone.

[0019] 4) In this invention, the fault fracture zone filler stones printed by the 3D printer can fall into the filler component. The slide rail component drives the filler component to move to the exit end of the 3D printer to receive the fault fracture zone filler stones and place them between two adjacent baffles of the simulation box. The slide rail component can ensure that the fault fracture zone filler stones are laid in a set pattern, which is more in line with the actual situation of existing fault fracture zones, so as to ensure the accuracy of the test results.

[0020] 5) This invention improves the accuracy and reliability of test results by accurately evaluating the cutting performance of the cutter head by simulating the actual working conditions of the fault fracture zone; it sets up a shield machine simulation device to more realistically simulate the stress conditions during the actual tunneling process; and it uses a detection component to collect various parameters of the cutter head in real time and transmits them to the data processing system for analysis and processing, thereby improving the efficiency and accuracy of test data processing. Attached Figure Description

[0021] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0022] Figure 1 This is a schematic diagram of a simulation test device for cutting fault fracture zones using a shield tunnel cutter according to one or more embodiments of the present invention.

[0023] Figure 2 This is a schematic diagram of a U-shaped plate with a pre-reserved opening at the end in a simulation test device for cutting fault fracture zones using a shield tunnel cutter according to one or more embodiments of the present invention.

[0024] Figure 3 This is an enlarged schematic diagram of the connection between two adjacent U-shaped plates in a simulation test device for cutting fault fracture zones using a shield tunnel cutterhead according to one or more embodiments of the present invention. Figure 4 This is a schematic diagram of a baffle in a simulation test device for cutting fault fracture zones using a shield tunnel cutter according to one or more embodiments of the present invention.

[0025] Figure 5 This is an enlarged schematic diagram of a retractable component in a simulation test device for cutting fault fracture zones using a shield tunnel cutter according to one or more embodiments of the present invention.

[0026] Figure 6 This is a schematic diagram of the specific structure of the retractable component in a simulation test device for cutting fault fracture zones using a shield tunnel cutter according to one or more embodiments of the present invention.

[0027] Figure 7 This is a schematic diagram of the operation of a shield tunneling machine simulation device in a shield tunneling cutter cutting fault fracture zone simulation test device according to one or more embodiments of the present invention.

[0028] Figure 8 This is a schematic diagram of the cooperation between the 3D printer and the conveying mechanism in a simulation test device for cutting fault fracture zones by a shield tunnel cutter according to one or more embodiments of the present invention.

[0029] Figure 9 This is a schematic diagram of the multi-directional motion mechanism and filling component in a simulation test device for cutting fault fracture zones using a shield tunnel cutter according to one or more embodiments of the present invention.

[0030] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0031] The components include: 1. U-shaped plate; 2. Hinge; 3. Ear plate; 4. Mounting base; 5. Protruding block; 6. Pin; 7. Telescopic hydraulic rod; 8. Baffle; 9. Hole; 10. Shield machine simulation device; 11. Cutting cutter body; 12. Detection component; 13. Propulsion drive motor; 14. First conveyor belt; 15. Slag box; 16. Control terminal; 17. Reserved opening; 18. 3D printer; 19. Exit end; 20. Second conveyor belt; 21. Filling component; 22. Slide rail component; 23. Connecting seat; 24. Gate valve; 25. Y-axis linear slide rail; 26. X-axis linear slide rail. Detailed Implementation

[0032] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0033] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. As described in the background section, the existing technology does not address the safety issues of shield tunneling in fault fracture zones. To solve the above-mentioned technical problems, this invention proposes a simulation test device for shield tunneling cutter cutting fault fracture zones.

[0034] Example 1 In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a simulation test device for shield tunneling cutterhead cutting fault fracture zone includes: The simulation box consists of multiple sections, which are detachably connected. The ends of the simulation box are provided with reserved openings 17. Baffles 8 are installed inside the simulation box. The baffles 8 are inclined relative to the bottom of the simulation box and can be pulled out relative to the simulation box. The baffles 8 have several holes 9 reserved for inserting forming tubes. The forming tubes can be steel pipes. The insertion direction of the forming tubes can be parallel to the bottom of the simulation box. Concrete is poured between the baffles 8 and the end of the simulation box. Some or all of the spaces between two adjacent baffles 8 are filled with fault fracture zone filling stones to form a fault fracture zone. The shield machine simulation device 10 has a cutter body 11, and a detection component 12 is set at the cutter body 11. The shield machine simulation device 10 can enter the interior of the simulation box through the reserved opening 17 of the simulation box. The power source and detection component 12 of the hobbing cutter body 11 are connected to the control terminal, which is a PLC controller or other type of controller.

[0035] As is easily understood, the simulation chamber comprises three U-shaped plates 1, each with three sides. Adjacent sides are connected by hinges and latches to facilitate opening the U-shaped plate 1, allowing the exposed concrete and fault fracture zone filler stones to be revealed after pouring. The latches refer to the protrusions and grooves on adjacent sides of the U-shaped plate; the protrusions can engage with the grooves. The widths of the U-shaped plates 1 may be the same or different. Adjacent U-shaped plates 1 are detachably connected via a latching structure. Alternatively, adjacent U-shaped plates 1 may have lugs 3 on their sides, allowing for detachable connection via fasteners. The middle U-shaped plate 1 can be replaced to simulate different widths of fault fracture zones, depending on experimental requirements.

[0036] In this embodiment, ear plates 3 for splicing are provided at the connection point of two adjacent U-shaped plates 1. The ear plates are located on the side of the U-shaped plates, and each ear plate 3 is provided with threaded holes. The splicing of two adjacent U-shaped plates 1 is achieved by fasteners such as screws passing through the threaded holes. A second sealing element is provided at the splicing point for sealing. The second sealing element can be a sealing gasket. In other examples, the ear plates 3 of two adjacent U-shaped plates are engaged and connected by providing a protrusion and a recess at the ear plate 3. That is, one ear plate 3 is provided with a protrusion, and the adjacent ear plate is provided with a recess that mates with the protrusion. The protrusion can be inserted into the recess. After the three U-shaped plates 1 are spliced, they become a through plate in the middle with a square end plate on each of the left and right sides, each with a circular hole. Figure 2 As shown, a reserved opening 17 for sealing the shield machine model is provided in the middle of the end plate, and a U-shaped groove is provided at the end of the outermost U-shaped plate 1. The end plate is inserted into the U-shaped groove to prevent concrete from flowing out from the reserved opening 17 when the surrounding rock is poured.

[0037] refer to Figure 4 As shown, a first sealing element, which is a rubber ring, is provided on the side of the baffle 8. The baffle 8 has multiple holes 9, specifically three rows and three columns of holes. A mounting base 4 is provided on one side of the ear plate 3 at the bottom of two adjacent U-shaped plates 1 for mounting one end of the baffle 8. (Refer to...) Figure 3As shown, the mounting base 4 is provided with a slot, which is an arc-shaped groove. One side of the baffle 8 has an arc-shaped longitudinal section, and the shape of the slot is adapted to one side of the baffle 8. The slot's longitudinal section is also arc-shaped, and the opening of the slot faces the inclined baffle 8, allowing one end of the baffle 8 to be inserted into the slot. Both sides of the baffle 8 are connected to a telescopic component, such as a telescopic hydraulic rod 7. The fixed end of the telescopic hydraulic rod 7 is fixed to the top side of the baffle 8, and the movable end of the telescopic hydraulic rod 7 is fixed to the U-shaped plate 1. After the baffle 8 is installed and connected to the telescopic hydraulic rod 7, the length of the telescopic hydraulic rod can be adjusted by the control terminal 16. By extending or shortening the telescopic hydraulic rod 7, the tilt angle of the baffle 8 can be adjusted to simulate the dip angle factor of the fault fracture zone.

[0038] refer to Figure 5 and Figure 6 As shown, a protruding post 5 is provided on the inner side of the U-shaped plate 1, and a connecting seat 23 is provided on the movable end of the telescopic hydraulic rod 7. The connecting seat 23 and the protruding post are hinged together by a pin. A protruding post 6 is provided at the baffle 8, and a connecting post 23 is also provided on the fixed end of the telescopic hydraulic rod 7. The connecting post 23 and the protruding post at the baffle 8 are hinged together by a pin 6.

[0039] A 3D printer 18 is connected via a control terminal. The 3D printer 18 can print simulated stone to serve as filler stone for fault fracture zones. The filler stone is then dispensed downwards through the outlet end 19. (Reference) Figure 8 As shown, a second conveyor belt 20 is installed at the outlet 19. The printed fault fracture zone filling stones are placed into the filling component 21 by the conveyor belt. The filling component 21 is supported by the slide rail component 20. The slide rail component 20 includes a support frame. The support frame does not affect the unfolding of the middle U-shaped frame 1. The support frame supports the multi-directional motion mechanism. The support frame is placed above the simulation box. The multi-directional motion mechanism is connected to the filling component 21. The slide rail component 22 drives the filling component 21 to achieve free movement in the horizontal and vertical directions, so that the filling component 21 can move along the length and width directions of the U-shaped plate 1. It is laid according to the pattern of the fault fracture zone filling stones, which is more in line with the actual situation of the existing fault fracture zone and better simulates the internal condition of the fault fracture zone.

[0040] Specifically, the filling assembly 21 includes a filling box, and a gate valve 24 is provided at the bottom of the filling box. The gate valve 24 is connected to the control terminal.

[0041] refer to Figure 9As shown, the multi-directional motion mechanism includes two X-axis linear slide rails 26. The support frame supports the X-axis linear slide rails 26. The X-axis linear slide rails are set along the width direction of the simulated box. The first slider of each X-axis linear slide rail 26 is connected to the Y-axis linear slide rail 25. The second slider of the Y-axis linear slide rail 25 is connected to the filling assembly 21. The gate valve 24 at the bottom of the filling assembly 21 is set at a staggered position from the Y-axis linear slide rail. After the gate valve 24 is opened, the fault fracture zone filling stone falls from the gate valve opening and enters the inner side of the middle U-shaped plate.

[0042] In some examples, the slide rail assembly 22 can be a mobile trolley, which supports the filling assembly 21 to drive the multi-directional movement of the filling assembly 21.

[0043] refer to Figure 7 As shown, after the formation simulation box is prepared, it enters the reserved opening 17 through the shield machine simulation device 10 to break the rock with the cutter head. The cutter head of the shield machine simulation device 10 can be designed and manufactured according to the cutter head size and shape of the actual shield machine.

[0044] The tunnel boring machine (TBM) simulation device 10 is manufactured by imitating the structure of an existing TBM, or, if a 1:1 simulation test is to be achieved, an existing TBM can be used directly. The cutterhead body 11 has the same structure as the existing cutterhead body. The cutterhead body 11 includes a cutterhead, and cutters are installed on the cutterhead. The power source of the cutterhead body 11 includes a linear drive mechanism, which is connected to a rotary motor. The rotary motor is connected to the cutterhead body. The linear drive mechanism and the rotary motor drive the cutterhead body to rotate and cut. The cutting parameters of the cutterhead, such as the rotation speed and the advance speed, are adjusted at the control terminal 16. The TBM simulation device 10 also includes a propulsion drive motor 13, which drives the entire TBM simulation device 10 to advance forward.

[0045] In addition, the detection component 12 is used to detect data such as wear and stress of the roller cutter. The detection component 12 includes a distance sensor, which is located on the front side of the roller cutter body 11. The distance sensor is connected to the lifting mechanism, which can be a lifting motor. The lifting motor is connected to the control terminal 16, which controls the lifting of the lifting motor. When detecting the thickness of the roller cutter, the lifting motor moves downward to the front side of the roller cutter. When the roller cutter needs to work, the lifting mechanism drives the distance sensor to retract. The distance sensor is specifically an existing ultrasonic distance sensor. The detection component 12 also includes a pressure sensor, which is installed on the cutter body 11. The pressure sensor can perform three tests: the stress state of the cutter is detected in the transition section between the fault fracture zone and the surrounding rock; a second test is performed inside the fault fracture zone to verify whether the cutter is impacted by rock blocks of different sizes and the wear condition of the cutter; and the same test is performed at the interface between the fault fracture zone and the surrounding rock to verify whether it is affected by impact.

[0046] refer to Figure 7 As shown, a soil chamber is set behind the cutter body of the tunnel boring machine simulation device 10, the first conveyor belt 14 is set at an angle upward, and a slag box is set below the output end of the first conveyor belt. The soil generated by the cutter body 11 breaking the rock is stored in the soil chamber and is transmitted out of the tunnel boring machine simulation device 10 through the first conveyor belt 14 and falls into the slag box 15 at the tail end of the tunnel boring machine simulation device 10.

[0047] The experimental device provided in this embodiment uses an inclined baffle 8 to simulate the inclination of the fault fracture zone. The baffle 8 has holes for inserting molding tubes. When concrete is poured between the end of the simulated box and the baffle, a structure similar to the surrounding rock is formed. After the concrete solidifies, the corresponding section of the simulated box can be removed, forming a pore. Finally, after filling the fault fracture zone with filler stone, a transition zone with cracks but not completely broken fault fracture zone is formed. Excavation work is carried out through the shield tunneling machine simulation device to study the stability and safety of the fault fracture zone during shield tunneling, to better understand the interaction between the cutter body and the rock, and to optimize the cutter design and construction scheme.

[0048] The simulation test device provided by this invention can highly simulate the actual geological conditions of fault fracture zones. Through 3D printing, the filling stone of the fault fracture zone can be printed, ultimately altering parameters such as hardness, fracture properties, and friction coefficient. This makes the working environment of the cutterhead in the test very close to the actual tunneling environment, which is beneficial for simulating the tunneling speed and pressure during actual tunneling. Furthermore, the magnitude and direction of these parameters can be adjusted as needed, effectively improving the efficiency and safety of shield tunneling. This provides powerful experimental means and technical support for the research and development of shield tunneling technology, contributing to the innovation and development of shield tunneling technology. The research results can be widely applied in tunnel engineering, underground engineering, and other fields, possessing broad application prospects and market potential.

[0049] The detection component can collect various parameters of the roller cutter in real time and accurately during the cutting process, such as pressure and wear. These data provide a reliable basis for subsequent performance evaluation. The width of the U-shaped plate in the middle can be changed to simulate working conditions with different widths of the fault fracture zone. The whole system is flexible and ensures that the test can cover a wider range of working conditions, improving the comprehensiveness and applicability of the test results.

[0050] Example 2 This embodiment provides a simulation test method for shield tunneling cutterhead cutting fault fracture zone, employing the aforementioned simulation test device for shield tunneling cutterhead cutting fault fracture zone, including the following: Three U-shaped plates 2 are connected to form a simulated box and sealed. A baffle 8 is set inside the simulated box. The baffle 8 is tilted relative to the bottom of the simulated box. The tilt angle of the baffle relative to the bottom of the simulated box can be adjusted as needed. Lubricating oil is applied to the inside of the U-shaped plates 1 on both sides and the surface of the forming tube that meets the experimental requirements. The forming tube is inserted into the pre-reserved hole on the baffle 8. This is used to form a gap when concrete is poured inside the simulated box to simulate the transition zone of the fault fracture with cracks but not completely broken. After shaping, the U-shaped plates 1 of the surrounding rock part are removed. After the concrete solidifies, the baffle 8 is pulled out without damaging the tilt angle and can also prevent the subsequent obstruction of the tunnel boring machine simulation device 10. Then the forming tube is pulled out to form the desired gap. Input the parameters of the fault fracture zone filling stone required for the experiment into the control terminal. After the 3D printer generates the fault fracture zone filling stone, the filling component 21 is used to load the fault fracture zone filling stone between two adjacent baffles 8 to form a transition zone with cracks but not completely broken fault fracture zone. Open the U-shaped plate in the middle. The tunnel boring machine simulation device 10 enters through the reserved opening 17 of the simulation box, the cutter head 11 starts working, and the detection component 12 acquires relevant data and sends it to the control terminal.

[0051] It should be noted that although the two outer U-shaped plates have been removed during the filling process of the fault fracture zone, the baffle is tilted outward. However, since the fault fracture zone filling stones are laid layer by layer, the missing part does not affect the smooth laying of the fault fracture zone filling stones.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A simulation test device for shield tunneling cutterhead cutting fault fracture zone, characterized in that, include: The simulation box consists of multiple sections, with adjacent sections detachably connected. The ends of the simulation box have reserved openings. Inside the simulation box, there are baffles that are inclined relative to the bottom of the simulation box and can be pulled out. The baffles have several holes for inserting molding tubes. Concrete is poured between the baffles and the ends of the simulation box. Some or all of the spaces between adjacent baffles are filled with fault fracture zone filling stones to form a fault fracture zone. The tunnel boring machine (TBM) simulation device has a cutterhead body with a detection component installed on the cutterhead body. The TBM simulation device can enter the interior of the simulation box through a reserved opening in the simulation box. The control terminal is connected to the power source and detection components of the hob body.

2. The simulation test device for shield tunnel cutterhead cutting fault fracture zone according to claim 1, characterized in that, The bottom of the baffle is hinged to the simulated box, and the baffle is inclined toward the outer end of the simulated box. The inclination angle of the baffle relative to the bottom of the simulated box is adjustable. A first sealing element is provided on the side of the baffle.

3. The simulation test device for shield tunneling cutterhead cutting fault fracture zone according to claim 2, characterized in that, The baffle is provided with retractable components on both sides. The fixed end of the retractable component is hinged to the baffle, and the movable end of the retractable component is hinged to the side wall of the simulation box.

4. The simulation test device for shield tunneling cutterhead cutting fault fracture zone according to claim 1, characterized in that, The adjacent sections of the simulated box are sealed together. A mounting base is provided at the bottom of the simulation box. The mounting base is located near the connection between two adjacent sections of the simulation box. The mounting base is provided with a slot, and one side of the baffle can be rotatably installed in the slot.

5. The simulation test device for shield tunnel cutterhead cutting fault fracture zone according to claim 1, characterized in that, The simulated box includes three U-shaped panels. The sides of the U-shaped panels are connected by hinges and latches. The widths of the U-shaped panels are the same or different. Adjacent U-shaped panels are detachably connected by a snap-fit ​​structure. Alternatively, the sides of adjacent U-shaped panels are provided with lugs so that the sides of adjacent U-shaped panels can be detachably connected by fasteners. A U-shaped groove is provided at the outer end of the outermost U-shaped plate in the simulation box, and the end plate is inserted into the U-shaped groove.

6. The simulation test device for shield tunnel cutterhead cutting fault fracture zone according to claim 1, characterized in that, It also includes a 3D printer, which is connected to the control terminal. The 3D printer is supported by a frame and is set above the simulation box. The 3D printer is used to obtain printed fault fracture zone filled stone. A slide rail assembly is installed above the simulation chamber. The slide rail assembly supports the filling assembly and moves the filling assembly to the exit end of the 3D printer to receive the fault fracture zone filling stone and place the fault fracture zone filling stone between two adjacent baffles in the simulation chamber.

7. The simulation test device for shield tunnel cutterhead cutting fault fracture zone according to claim 6, characterized in that, The filling assembly includes a filling box, and a gate valve is provided at the bottom of the filling box. The gate valve is connected to the control terminal. The slide rail assembly includes a support frame that supports a multi-directional motion mechanism. The support frame spans the simulated box and connects the multi-directional motion mechanism to the filling assembly.

8. The simulation test device for shield tunneling cutterhead cutting fault fracture zone according to claim 1, characterized in that, The power source of the hob body includes a linear drive mechanism, which is connected to a rotary motor, and the rotary motor is connected to the hob body. The detection component includes a distance sensor, which is located on the front side of the cutter body and is connected to the lifting mechanism. The detection assembly also includes a pressure sensor, which is mounted on the cutter body.

9. The simulation test device for shield tunnel cutterhead cutting fault fracture zone according to claim 1, characterized in that, The tunnel boring machine simulation device has a soil chamber installed behind the cutter head, a conveyor belt installed on one side of the soil chamber, the conveyor belt is inclined upwards, and a slag box is installed below the output end of the conveyor belt.

10. A simulation test method for shield tunneling cutterhead cutting fault fracture zone, characterized in that, A simulation test device for cutting fault fracture zones using a shield tunnel cutterhead according to any one of claims 1-9, comprising the following components: The two adjacent sections of the simulation box are assembled to form the simulation box. A baffle is set inside the simulation box, and the baffle is set at an angle relative to the bottom of the simulation box. Insert the molding tube into the pre-drilled hole in the baffle, and pour concrete between the baffle and the end of the simulation box. After the concrete has set, the corresponding section of the simulated box is removed. After the concrete has solidified, the baffle is pulled outward relative to the simulated box, and the forming tube is pulled out to create a pore in the concrete. Filling stones in the fault fracture zone are inserted between some or all of the adjacent baffles to form a transition zone in the fault fracture zone that is cracked but not completely broken. The tunnel boring machine simulation device enters through the reserved opening in the simulation box, the cutter head starts working, and the detection component acquires relevant data and sends it to the control terminal.

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