A device and method for testing the torsion and shear of a shield segment

Abstract

The application discloses a kind of shield segment torsional shear test device and test method.Test device includes: upper segment, lower segment, rotatable rotating assembly, base, sensor assembly, intelligent terminal;Lower segment is fixedly arranged on the base;Upper segment is arranged on lower segment, and upper segment is fixedly connected with rotating assembly;Rotating assembly can drive upper segment to rotate, for simulating the torsional shear of tunnel segment in construction process;Sensor assembly is arranged on upper segment and on lower segment;Intelligent terminal is electrically connected with the sensor assembly, and intelligent terminal is used to collect and receive the acquisition signal output by the sensor assembly.The application drives upper segment to rotate by rotating assembly, to simulate the torsional shear of tunnel segment in construction process, and is collected by sensor assembly arranged on upper segment and on lower segment, and the acquisition signal output by sensor assembly is collected and received by intelligent terminal, and the displacement, stress and strain information of upper segment and lower segment in torsional process are comprehensively collected, that is, the effect of simulating the shearing effect of actual shield tunnel ring gap torsion on segment joint can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnels, and in particular to a shield segment torsional shear test device and a test method. Background Art

[0002] TBM is the abbreviation of Tunnel Boring Machine, also known as a shield machine. TBM is a large-scale mechanical equipment specially used for underground tunnel construction, usually composed of a cutterhead, a propulsion system, a support system and other parts. TBM digs underground tunnels by rotating the cutterhead, and uses the propulsion system to propel the entire machine forward. The support system is responsible for supporting and reinforcing the soil to ensure the safety and stability of tunnel construction. In recent years, with the rapid development of cities, subways have been widely used due to their efficient and reliable transportation capabilities. Among them, TBM tunnels are widely used in subway construction due to their high efficiency, high safety and adaptability to various geological conditions.

[0003] During the process of TBM advancing and installing the segments, the TBM will generate torsional forces on the tunnel segments. These torsional forces will act on the tunnel segments, especially at the segment joints, and will induce shearing. However, most of the current existing technology simulation studies on TBM tunnels focus on the performance of tunnel segments and segment joints, and do not involve the simulation of the shearing effect of the torsional effect of TBM tunnel segments on the joints. For example, Chinese patent CN11705407A provides a shield segment test device and test method. This technical solution can simulate the structural strength of variable test shield segments under different loads under groundwater pressure or geological conditions, but does not involve the simulation of the shearing effect of the torsional effect of TBM tunnel segments on the joints.

[0004] Therefore existing technology still needs to be improved and developed. Summary of the Invention

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a shield segment torsional shear test device and test method, aiming to solve the simulation research of TBM tunnels in the prior art, most of which focuses on the research on the performance of tunnel segments and segment joints, and does not involve the simulation of the shear effect of TBM tunnel segment torsional joints.

[0006] The technical solution of the present invention is as follows: a shield segment torsional shear test device and a test method are provided, the shield segment torsional shear test device comprising: an upper segment, a lower segment, a rotatable rotating assembly, a base, a sensor assembly, and an intelligent terminal; the lower segment is fixedly arranged on the base; the upper segment is arranged on the lower segment, and the upper segment is fixedly connected to the rotating assembly; the rotating assembly can drive the upper segment to rotate, so as to simulate the torsional shear of the tunnel segment during the construction process; the sensor assembly is arranged on the upper segment and the lower segment; the intelligent terminal is electrically connected to the sensor assembly, and the intelligent terminal is used to collect and receive the acquisition signal output by the sensor assembly.

[0007] A further configuration of the present invention, wherein the rotating assembly includes: a rotatable rotating drive member, a plurality of connecting parts and a plurality of limit plates; the plurality of limit plates are respectively arranged on both sides of the upper tube segment and fixedly connected to the upper tube segment, and the limit plates are used to limit the rotation path of the upper tube segment; the rotating drive member is connected to the upper tube segment through each of the connecting parts, and the rotating drive member is arranged opposite to the upper tube segment.

[0008] A further configuration of the present invention is that an arc-shaped inner rail and an outer rail are provided on the base, the inner diameter of the inner rail is smaller than the inner diameter of the outer rail; and each of the limiting plates abuts against the inner rail and the outer rail respectively.

[0009] A further configuration of the present invention is that a fixing plate is fixedly provided on each side surface of the upper tube segment, wherein the upper tube segment is fixedly connected to the plurality of limiting plates via one fixing plate.

[0010] A further configuration of the present invention further includes: a plurality of support rods and a top plate; the top plate and the base are arranged opposite to each other, one end of each support rod is connected to the base, and the other end of each support rod is connected to the top plate.

[0011] A further configuration of the present invention further includes: a plurality of pads, each of which is fixedly arranged on the upper tube sheet.

[0012] A further configuration of the present invention further includes: a plurality of axial jacks; and each of the pads is fixedly provided with a plurality of the axial jacks.

[0013] A further configuration of the present invention is that the lower tube segment is arranged on the base via a plurality of fixing components.

[0014] A further configuration of the present invention is that the fixing assembly includes: a plurality of high-strength bolts, a first steel plate and a first inclined plate; the first steel plate is fixedly connected to the surface of the base and the surface of the lower pipe segment respectively through the high-strength bolts; and the first inclined plate is fixedly set on the first steel plate through the high-strength bolts.

[0015] On the other hand, the present invention also provides a test method based on the above-mentioned shield segment torsional shear test device, which includes the steps of: fixing the lower segment on the base and setting the upper segment on the lower segment; setting a sensor assembly on the upper segment and the lower segment; fixing the upper segment to the rotating assembly; electrically connecting the sensor assembly to the smart terminal to start the rotating assembly, and collecting the collection signal output by the sensor assembly through the smart terminal.

[0016] Beneficial Effects: The present invention discloses a shield segment torsional shear test device and test method. The shield segment torsional shear test device comprises: an upper segment, a lower segment, a rotatable rotating assembly, a base, and an intelligent terminal; the lower segment is fixedly mounted on the base; the upper segment is mounted on the lower segment and is fixedly connected to the rotating assembly; the rotating assembly can drive the upper segment to rotate, thereby simulating the torsional shear of the tunnel segment during construction; the sensor assembly is mounted on the upper segment and the lower segment; the intelligent terminal is electrically connected to the sensor assembly and is used to collect and receive the acquisition signal output by the sensor assembly.

[0017] The shield segment torsional shear test device provided by the present invention drives the upper segment to rotate through a rotating component to simulate the torsional shear of the tunnel segment during the construction process, and collects data through a sensor component set on the upper segment and the lower segment. The intelligent terminal collects and receives the collection signal output by the sensor component, and comprehensively collects the displacement, stress and strain information of the upper and lower segments during the torsion process, thereby achieving the effect of simulating the shear effect of the torsion of the annular seam of an actual shield tunnel on the segment joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a shield segment torsional shear test device provided by the present invention.

[0020] Figure 2 forFigure 1 A top view of the shield segment torsional shear test device.

[0021] Figure 3 for Figure 1 A front view of the shield segment torsional shear test device.

[0022] Figure 4 for Figure 1 Schematic diagram of the three-dimensional structure of the simulated tunnel frame in the shield segment torsional shear test device.

[0023] Figure 5 for Figure 1 Schematic diagram of the connection structure of the rotating assembly in the shield segment torsional shear test device.

[0024] Figure 6 for Figure 1 Schematic diagram of the connection structure of the upper and lower segments in the shield segment torsional shear test device.

[0025] Figure 7 for Figure 1 Schematic diagram of the specific connection structure of the upper segment in the shield segment torsional shear test device.

[0026] Figure 8 for Figure 1 Schematic diagram of the specific connection structure of the fixed components in the shield segment torsional shear test device.

[0027] Figure 9 A top view of a shield segment torsional shear test device provided by the present invention during semi-ring assembly.

[0028] Figure 10 A top view of a shield segment torsional shear test device provided by the present invention during three-quarter ring assembly.

[0029] Figure 11 A top view of a shield segment torsional shear test device provided by the present invention during full ring assembly.

[0030] Figure 12 for Figure 1 Schematic diagram of the electrical connection structure of the sensor assembly and the intelligent terminal in the shield segment torsional shear test device.

[0031] Figure 13 The present invention provides a flow chart of a test method.

[0032] Explanation of the accompanying reference numerals: 10, upper tube segment; 20, lower tube segment; 30, rotating assembly; 40, base; 50, sensor assembly; 60, intelligent terminal; 70, support rod; 80, top plate; 90, fixing assembly; 11, annular bolt; 12, fixing plate; 31, rotating drive member; 32, connecting part; 33, limiting plate; 41, inner rail; 42, outer rail; 43, tenon; 44, mortise; 61, pad; 62, axial jack; 91, high-strength bolt; 92, first steel plate; 93, first inclined plate; 321, connecting rod; 322, inclined rod. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts shall fall within the scope of protection of the present invention.

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other.

[0035] Current simulations of tunnel segments primarily focus on studying the performance of tunnel segments and segment joints. These include testing the structural strength of shield segments under varying loads, simulating changes in groundwater pressure or geological conditions, studying the effects of different structural and joint types on segment joint performance, and investigating the mechanical properties of circumferential joints in shield tunnels subjected to combined longitudinal tension, compression, bending, and shear. However, existing research has not examined the impact of torsion on the shear effects of TBM tunnel segments during segment installation. During TBM advancement and segment installation, the TBM exerts torsional forces on the tunnel segments. These torsional forces act on the tunnel segments, particularly at the segment joints, inducing shear. Segment joints, the areas connecting two tunnel segments, are typically relatively weak points in the tunnel structure. When torsional forces are applied by the TBM, these joints may experience uneven forces, resulting in shear stress. If these shear forces exceed the designed capacity of the segment joints, they can lead to joint damage, cracking, or other structural problems. Therefore, it is necessary to study the shear effects of torsion on segment joints in shield tunnels.

[0036] Therefore, the present invention proposes a shield segment torsional shear test device, which is intended to simulate the shearing effect of the torsion of the annular seam of an actual shield tunnel on the segment joints.

[0037] like Figures 1 to 12As shown, the present application provides a shield segment torsion shear test device, which comprises: an upper segment 10, a lower segment 20, a rotatable rotating assembly 30, a base 40, a sensor assembly 50, an intelligent terminal 60; the lower segment 20 is fixedly arranged on the base 40; the upper segment 10 is arranged on the lower segment 20, and the upper segment 10 is fixedly connected with the rotating assembly 30; the rotating assembly 30 can drive the upper segment 10 to rotate, for simulating the torsion shear of the tunnel segment in the construction process; the sensor assembly 50 is arranged on the upper segment 10 and the lower segment 20 respectively; the intelligent terminal 60 is electrically connected with the sensor assembly 50, and the intelligent terminal 60 is used for collecting and receiving the collection signals output by the sensor assembly 50.

[0038] Specifically, the shield segment torsion shear test device in the present application is provided with the base 40 to simulate the base of the tunnel. In the present application, a plurality of segments, i.e. the upper segment 10 and the lower segment 20, are arranged to actually simulate the tunnel segment, and the position of the upper segment 10 is higher than that of the lower segment 20, the lower segment 20 is arranged on the base 40 and is fixedly connected with the base 40. As shown in Figure 1 、 Figure 3 、 Figure 9 、 Figure 10 and Figure 11 in the present application, two adjacent lower segments 20 are arranged as a group, and the adjacent two lower segments 20 are connected through the ring seam bolt 11.

[0039] In the present application, the number of segments can be increased or decreased according to the actual situation, in addition to the shield segment torsion shear test device with a quarter ring assembly as shown in Figure 1 , the shield segment torsion shear test device with a half ring assembly as shown in Figure 9 , the shield segment torsion shear test device with three-quarters ring assembly as shown in Figure 10 and the shield segment torsion shear test device with a whole ring assembly as shown in Figure 11 .

[0040] Further, the upper segment 10 is arranged on the lower segment 20, in the present application, one upper segment 10 is arranged on the two lower segments 20 in the initial state, and the upper segment 10 and the lower segment 20 are also connected through a plurality of ring seam bolts 11.

[0041] As shown in Figure 1 、 Figure 2 and Figure 5As shown in the present application, in order to simulate the torsional force generated by TMB, the present application is provided with the rotating assembly 30, which can rotate, and is fixedly connected with the base 40 through high-strength bolts 91. Figure 1 、 Figure 9 、 Figure 10 and Figure 11 As shown, the rotating assembly 30 is arranged at the circular arc of the base 40.

[0042] The rotating assembly 30 can rotate according to the preset instructions, or can be started and stopped according to the user's control, and the rotating assembly 30 is fixedly connected with the upper pipe piece 10, so the rotating action of the rotating assembly 30 will directly affect the position and state of the upper pipe piece 10.

[0043] Because the upper pipe piece 10 and the lower pipe piece 20 are connected by the ring seam bolt 11 in the initial state, when the rotating assembly 30 is started to rotate, the rotating assembly 30 will generate a torsional force on the upper pipe piece 10 and the lower pipe piece 20, and drive the upper pipe piece 10 to rotate along the surface of the lower pipe piece 20, so the ring seam of the upper pipe piece 10 and the lower pipe piece 20 will be twisted, and in this process, a shearing action will be generated on the joints of the upper pipe piece 10 and the lower pipe piece 20, so the torsional shear of the tunnel pipe piece in the construction process can be simulated.

[0044] In order to obtain the shearing action generated by the upper pipe piece 10 and the lower pipe piece 20 on the joints of the upper pipe piece 10 and the lower pipe piece 20 during the ring seam torsion process, as shown in Figure 1 and Figure 12 The present application is provided with the sensor assembly 50 at the joints of the upper pipe piece 10 and the lower pipe piece 20, wherein the sensor assembly 50 includes displacement meters, stress sensors and strain sensors, etc., to collect the displacement information, stress information and strain information of the upper pipe piece 10 and the lower pipe piece 20. The sensor assembly 50 outputs the collection signal containing the above information after collecting the above information.

[0045] The present application is also provided with the intelligent terminal 60, which is electrically connected with the sensor assembly 50, and is used to collect and receive the collection signal output by the sensor assembly 50. The intelligent terminal 60 can analyze and compare the collection signal, helping the user to simulate and study the shearing action of the pipe piece joint.

[0046] Thus, the present invention utilizes the displacement meter in the sensor assembly 50 to measure the positional changes of the upper and lower segments 10, 20 during torsion, recording displacement data of the upper and lower segments 10, 20. This displacement data can be used to assess the impact of annular seam torsion on the segment structure and its displacement response. Furthermore, the stress sensor in the sensor assembly 50 detects the forces exerted on the joints of the upper and lower segments 10, 20 during torsion. By measuring stress, the magnitude and distribution of the forces acting on the segment joints can be determined, thereby assessing the strength and stability of the segment joints.

[0047] Therefore, in the present invention, the upper segment 10 is driven to rotate by the rotating component 30 to simulate the torsion and shear of the tunnel segment during the construction process, and the sensor component 50 is set on the upper segment 10 and the lower segment 20 for collection. The intelligent terminal 60 collects and receives the collection signal output by the sensor component 50, and comprehensively collects the displacement, stress and strain information of the upper segment 10 and the lower segment 20 during the torsion process, thereby achieving the effect of simulating the shear effect of the actual shield tunnel annular seam torsion on the segment joint.

[0048] Furthermore, in one possible embodiment, the rotation assembly 30 specifically includes: a rotatable rotational drive member 31, multiple connecting portions 32, and multiple limiting plates 33. The limiting plates 33 are respectively disposed on both sides of the upper tube segment 10 and fixedly connected to the upper tube segment 10. The limiting plates 33 are used to limit the rotation path of the upper tube segment 10. The rotational drive member 31 is connected to the upper tube segment 10 via each of the connecting portions 32 and is disposed opposite the upper tube segment 10.

[0049] In the present invention, the rotary drive member 31 is driven by the rotary assembly 30. The lower tube segment 20 is disposed around the rotary drive member 31, and the rotary drive member 31 is also disposed opposite the upper tube segment 10. A plurality of limit plates 33 are disposed on both the side of the upper tube segment 10 facing the rotary drive member 31 and the side of the upper tube segment 10 facing away from the rotary drive member 31. The upper tube segment 10 is also fixedly connected to the plurality of limit plates 33 to limit the displacement path of the upper tube segment 10. One end of each limit plate 33 is disposed on the upper tube segment 10, and the limit plate 33 abuts against the base 40.

[0050] And, in order to make the rotating assembly 30 can drive the upper pipe piece 10 to twist, the application connects the rotating drive 31 and the upper pipe piece 10 through the connecting part 32, and can be provided with a plurality of connecting parts 32 to correspond to connect a plurality of upper pipe pieces 10. One end of the connecting part 32 is fixedly connected with the upper pipe piece 10, and the other end of the connecting part 32 is fixedly connected with the rotating drive 31. The rotating drive 31 can rotate according to the preset instruction, or can start rotating and stop rotating according to the user's control. In this way, when the rotating drive 31 starts to rotate, it can drive the upper pipe piece 10 to twist and rotate, so as to achieve the effect of simulating the torsional shear of the tunnel pipe piece in the construction process.

[0051] In addition, for the specific structure of the connecting part 32, the connecting part 32 comprises a plurality of connecting rods 321 and a plurality of inclined rods 322, one end of each inclined rod 322 is connected with the rotating drive 31, the other end of each inclined rod 322 is connected with the upper pipe piece 10, each is uniformly arranged along the surface of the rotating drive 31, and each inclined rod 322 is arranged between each connecting rod 321.

[0052] The connecting rod 321 is the basic component of the connecting part 32, and each connecting rod 321 is usually uniformly arranged along the surface of the rotating drive 31, forming a stable basic frame for supporting and connecting the inclined rod 322, the rotating drive 31 and the upper pipe piece 10.

[0053] And the arrangement of each inclined rod 322 provides stable support for the upper pipe piece 10, and also enables the upper pipe piece 10 to rotate or move correspondingly with the driving of the rotating drive 31. The inclined rod 322 is arranged between each connecting rod 321, and the inclined rod 322 can improve the lateral stiffness of the connecting rod 321. Avoiding the problem that the connecting rod 321 is damaged due to the insufficient stiffness of the inclined rod 322 to bear the excessive rotating bending moment during rotation.

[0054] Further, in a possible implementation mode, as shown in Figure 1 , Figure 2 and Figure 4 , an arc-shaped inner track 41 and an outer track 42 are arranged on the base 40, the inner diameter of the inner track 41 is smaller than the inner diameter of the outer track 42, and each limiting plate 33 abuts against the inner track 41 and the outer track 42.

[0055] Specifically, the other end of each of the limit plates 33 is respectively in contact with the inner rail 41 and the outer rail 42, so that each of the limit plates 33 can slide along the arc track formed by the inner rail 41 and the outer rail 42, thereby driving the upper tube segment 10 to rotate along the arc.

[0056] Furthermore, in a possible implementation manner, as Figure 6 and Figure 7 As shown, a fixing plate 12 is fixedly provided on each side surface of the upper tube segment 10 , wherein the upper tube segment 10 is fixedly connected to the plurality of limiting plates 33 via one fixing plate 12 .

[0057] Specifically, the fixing plates 12 are provided on each side surface of the upper tube segment 10 , that is, on all four sides of the upper tube segment 10 , wherein the size of each fixing plate 12 is adapted to the size of each side surface of the upper tube segment 10 .

[0058] Thus, by providing each of the fixing plates 12, a wrapping assembly is formed on the upper tube segment 10 to secure the upper tube segment 10, stabilize the upper tube segment 10 in position during the simulation, and ensure accurate application of the torsional force. Furthermore, each fixing plate 12 is adjustable to accommodate tube segments of varying sizes and shapes.

[0059] Furthermore, in a possible implementation manner, as Figure 2 and Figure 3 As shown, the shield segment torsional shear test device further includes: a plurality of pads 61 and a plurality of axial jacks 62 , each of the pads 61 being fixedly disposed on the upper segment 10 , and a plurality of the axial jacks 62 being fixedly disposed on each of the pads 61 .

[0060] Specifically, during the actual installation of tunnel segments, the segments will also experience a thrust force. Therefore, to simulate this thrust force, the present invention provides multiple axial jacks 62 to apply an axial thrust force to the upper segment 10 in the axial direction. Furthermore, a backing plate 61 is provided between the axial jacks 62 and the upper segment 10. The backing plate 61 is fixedly mounted on the upper segment 10 to provide a stable platform or support surface for the upper segment 10. This ensures that the force applied by each axial jack 62 is evenly and effectively transmitted to the upper segment 10, thereby achieving a better simulation of the thrust force in reality.

[0061] Furthermore, in a possible implementation manner, as Figure 1 、 Figure 3 and Figure 4As shown, the shield segment torsion shear test device further comprises a plurality of support rods 70 and a top plate 80; the top plate 80 and the base 40 are oppositely arranged, one end of each support rod 70 is connected with the base 40, and the other end of each support rod 70 is connected with the top plate 80. Wherein, each support rod 70 is fixedly connected with the top plate 80 and the base 40 through high-strength bolts 91, and the top plate 80 is fixedly connected with each axial jack 62 through high-strength bolts 91.

[0062] In this way, the top plate 80 can be applied to the upper segment 10 by the support rod 70 and the base 40 to form a whole.

[0063] Wherein, a plurality of mortises 43 and a plurality of tenons 44 are arranged on the side of the top plate 80 and the base 40, so that when the shield segment torsion shear test device is formed in a half-ring assembly, a three-quarter ring assembly, and a whole ring assembly, each mortise 43 and each tenon 44 can be assembled.

[0064] Further, in a possible implementation mode, as shown in Figure 3 and Figure 9 As shown, the lower segment 20 is arranged on the base 40 through a plurality of fixing assemblies 90. The fixing assembly 90 comprises a plurality of high-strength bolts 91, a first steel plate 92, and a first inclined plate 93; the first steel plate 92 is fixedly connected with the surface of the base 40 and the surface of the lower segment 20 through the high-strength bolts 91; and the first inclined plate 93 is fixedly arranged on the first steel plate 92 through the high-strength bolts 91.

[0065] Specifically, as shown in Figure 9 For the connection mode of the lower segment 20 and the base 40, the lower segment 20 is fixed on the base 40 in the present application through the fixing assembly 90. The first steel plate 92 is of an "L" type structure, two surfaces of the first steel plate 92 are connected with the base 40 and the lower segment 20 respectively, so as to fixedly connect the base 40 and the lower segment 20, and the first steel plate 92 is firmly installed through a plurality of high-strength bolts 91. The arrangement of the first steel plate 92 not only enhances the structural strength of the entire experimental device, but also plays a role in dispersing force, avoiding excessive stress concentration at a specific point, and helping to more accurately simulate the actual situation.

[0066] And the first inclined plate 93 is fixedly arranged on the first steel plate 92 through the high-strength bolts 91. The first inclined plate 93 is arranged to support the first steel plate 92 to avoid bending of the first steel plate 92 close to the lower segment.

[0067] In another aspect, based on the shield segment torsion and shear test device described above, the application also provides a test method based on the device, which can simulate the torsion of the TBM tunnel segment on the joint shear effect.

[0068] Figure 13 For the flowchart of the test method, the order of the steps in the flowchart can be changed according to different needs, and some steps can be omitted. Please refer to Figures 1 to 13 , the test method specifically includes the following steps.

[0069] S100, the lower segment is fixedly arranged on the base, and the upper segment is arranged on the lower segment.

[0070] Specifically, first, the tunnel frame is simulated and constructed, wherein, before step S100, it further includes the step of: Sa, arranging a plurality of support rods on the base. As Figure 1 shown, each support rod 70 is arranged vertically and connected with the base 40 through high-strength bolts 91, so that each support rod 70 can be fixedly connected to the base 40, and each support rod 70 is arranged at each corner of the base 40.

[0071] Each vertically arranged support rod 70 provides necessary support structure for further construction of the tunnel frame, ensuring smoothness of the simulation experiment process and stability of the subsequent stage. In the application, the stability between the support rod 70 and the base 40 is ensured by the firm connection of the high-strength bolts, so that displacement or inclination during the simulation process is avoided.

[0072] Specifically, before step S100, after step Sa, it further includes the step of: Sb, arranging a top plate on each support rod. Each support rod 70 is also connected with the top plate 80 through high-strength bolts 91, and the stability and carrying capacity of the entire shield segment torsion and shear test device can be improved by combining the top plate 80 with the support rod 70.

[0073] For the specific process of step S100, in step S100, it specifically includes the step of: S110, placing the lower segment on the base and connecting the lower segment with the device base through high-strength bolts. In this way, the lower segment 20 can be fixedly arranged on the base 40.

[0074] Specifically, in step S100, after step S110, it further includes the step of: S120, placing the upper segment on the lower segment and connecting the upper segment with the lower segment through high-strength bolts.

[0075] Further, after step S100, the test method further comprises the step of: S200, arranging sensor assemblies on the upper tube piece and on the lower tube piece. In this way, the sensor assemblies 50 are arranged on the upper tube piece 10 and on the lower tube piece 20, so that displacement information, stress information and strain information of the upper tube piece 10 and the lower tube piece 20 can be collected.

[0076] Further, after step S200, the test method further comprises the step of: S300, fixedly connecting the upper tube piece with the rotating assembly.

[0077] Specifically, in order to make the rotating assembly 30 better to determine the upper tube piece 10 to twist, the step of S300 comprises the steps of: S310, fixedly arranging a fixed plate on each side of the upper tube piece, and the upper tube piece and each fixed plate are fixedly connected through high-strength bolts. S320, arranging a plurality of limiting plates on the inner rail and the outer rail of the base respectively, and fixedly connecting each limiting plate with the fixed plate through high-strength bolts. S330, placing a cushion block and an axial jack on the top of the upper tube piece, and fixedly connecting the axial jack with the top plate through high-strength bolts. S340, placing a twisting assembly on the arc of the device base, and fixedly connecting the twisting assembly with the base through high-strength bolts.

[0078] Further, after step 300, the test method further comprises the steps of: S400, electrically connecting the sensor assembly with the intelligent terminal; S500, starting the rotating assembly, and collecting the collection signals output by the sensor assembly through the intelligent terminal.

[0079] Therefore, in summary, the shield tube piece torsional shear test device and test method are provided in the present application. In the present application, the upper tube piece is rotated by the rotating assembly to simulate the torsional shear of the tunnel tube piece in the construction process, and the sensor assemblies are arranged on the upper tube piece and on the lower tube piece to collect the collection signals output by the sensor assemblies, and the intelligent terminal collects and receives the collection signals output by the sensor assemblies, so that the displacement, stress and strain information of the upper tube piece and the lower tube piece in the twisting process can be collected comprehensively, and the effect of simulating the shearing effect of the ring joint of the shield tunnel on the tube piece joint can be achieved.

[0080] It should be noted that the present application introduces the specific structure and working principle of the shield tube piece torsional shear test device and test method, but the application of the present application is not limited to the shield tube piece torsional shear test device and test method, and can also be applied to other similar workpieces.

[0081] It should be understood that the present application is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present application is only limited by the appended claims.

[0082] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A shield segment torsional shear test device, characterized in that: include: Upper tube segment, lower tube segment, rotatable rotating assembly, base, sensor assembly, and intelligent terminal; The lower tube segment is fixedly arranged on the base; The upper tube segment is arranged on the lower tube segment, and the upper tube segment is fixedly connected to the rotating assembly; The rotating assembly can drive the upper segment to rotate, so as to simulate the torsion and shear of the tunnel segment during construction; The sensor assembly is arranged on the upper tube segment and the lower tube segment; The smart terminal is electrically connected to the sensor component, and is used to collect and receive the acquisition signal output by the sensor component; The rotating assembly includes: a rotatable rotating driving member, a plurality of connecting parts and a plurality of limiting plates; A plurality of limit plates are respectively arranged on both sides of the upper tube segment and fixedly connected to the upper tube segment, and the limit plates are used to limit the rotation path of the upper tube segment; The rotary drive member is connected to the upper tube segment through each of the connecting parts, and the rotary drive member is arranged opposite to the upper tube segment; An arc-shaped inner track and an outer track are provided on the base, wherein the inner diameter of the inner track is smaller than the inner diameter of the outer track; Each of the limiting plates is in contact with the inner rail and the outer rail respectively.

2. The shield segment torsional shear test device according to claim 1, characterized in that: A fixing plate is fixedly provided on each side surface of the upper tube segment, wherein the upper tube segment is fixedly connected to the plurality of limiting plates via one fixing plate.

3. The shield segment torsional shear test device according to claim 1, characterized in that: Also includes: multiple support rods and top plates; The top plate and the base are arranged opposite to each other, one end of each support rod is connected to the base, and the other end of each support rod is connected to the top plate.

4. The shield segment torsional shear test device according to claim 1, characterized in that: Also includes: A plurality of pads are provided, each of the pads being fixedly arranged on the upper tube sheet.

5. The shield segment torsional shear test device according to claim 4, characterized in that: Also includes: Multiple axial jacks; A plurality of axial jacks are fixedly arranged on each of the pads.

6. The shield segment torsional shear test device according to claim 5, characterized in that: The lower tube sheet is arranged on the base through a plurality of fixing components.

7. The shield segment torsional shear test device according to claim 6, characterized in that: The fixing assembly includes: a plurality of high-strength bolts, a first steel plate and a first inclined plate; The first steel plate is fixedly connected to the surface of the base and the surface of the lower tube segment respectively through the high-strength bolts; Furthermore, the first inclined plate is fixed on the first steel plate by the high-strength bolts.

8. A test method based on the shield segment torsional shear test device according to any one of claims 1 to 7, characterized in that: Including steps: The lower tube segment is fixedly mounted on the base, and the upper tube segment is mounted on the lower tube segment; Disposing a sensor assembly on the upper tube segment and the lower tube segment; Fixedly connect the upper tube segment to the rotating assembly; Electrically connecting the sensor assembly to the smart terminal; Start the rotating component and collect the acquisition signal output by the sensor component through the intelligent terminal.

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