Vibration table test simulation equipment for comprehensive pipe gallery under action of oblique incident waves

Abstract

The invention provides vibration table test equipment for simulating a comprehensive pipe gallery under the action of oblique incident waves, the vibration table test equipment comprises a shearing box, a horizontal loading device is mounted in the shearing box, the shearing box is filled with soil, one end of the horizontal loading device is connected with the bottom end face of the pipe gallery through a supporting seat, and the other end of the horizontal loading device is connected with the bottom end face of the pipe gallery. The pipe gallery is obliquely arranged in the shearing box containing soil, a round pipe is fixedly connected to the top end face of the pipe gallery, a steel bar is arranged in the round pipe, and one end of the steel bar is fixed to the pipe gallery. The influence of the gravity direction on the structural response is reduced through the horizontal loading device, the horizontal loading device is connected with the pipe gallery through the spherical hinge support with flexible movement and vibration reduction, the influence of vibration on the accuracy of the horizontal loading device is reduced through components such as a metal sheet, rubber and a spring, the stability and safety are improved, and the construction cost is reduced. And the effect of seismic oscillation on the oblique incidence of the pipe gallery can be accurately simulated through the test.

Description

Technical Field

[0001] The present invention relates to the field of disaster prevention and mitigation engineering and protective engineering, and in particular to a vibration table test simulation device for a comprehensive pipe gallery under the action of oblique incident waves. Background Art

[0002] The vibration table test of the utility corridor is an experimental method used to study and evaluate the performance of the utility corridor under dynamic loads such as earthquakes. The vibration table is a mechanical device that can simulate seismic motion. It can generate horizontal and vertical vibrations at different frequencies and amplitudes to simulate the effects of seismic waves on the structure. The loading method is to control the movement of the vibration table to apply preset seismic motions. Tests of various loading conditions can be carried out, such as horizontal loading, vertical loading, combined loading, etc. The response of the utility corridor is monitored in real time through sensors (such as accelerometers, displacement meters, strain gauges, etc.), including acceleration, displacement, stress strain and other data. Based on the collected test data, the dynamic characteristics, deformation mode, internal force distribution, etc. of the utility corridor under the action of seismic motion are analyzed to evaluate its seismic performance and damage mechanism, such as Fig. 9 shown.

[0003] According to the search, oblique incidence of seismic waves refers to the situation where seismic waves enter the interface of the crust or mantle at a non-vertical angle. This oblique incidence will affect the propagation speed and direction of seismic waves, resulting in refraction or reflection of waves in different media. In particular, according to Snell's law, when the SV wave is incident at an angle greater than a certain angle, non-uniform waves will be generated near the surface. This angle is the critical angle of SV wave incidence:

[0004]

[0005] Where v is the Poisson's ratio of soil.

[0006] Theoretically, according to Snell's law, seismic waves will be refracted at the interface of different media due to the different wave velocities of the media. This process can be described by the change in wave velocity and the angle of incidence of the wave:

[0007]

[0008] Where r, t represent the incident wave and reflected wave respectively; c s Represents the shear wave velocity of the medium.

[0009] At present, a large number of scholars have studied the destructive effects of earthquake motion on underground structures and found that underground structures respond more strongly to oblique earthquake motion. Therefore, it is particularly important to study a device suitable for a vibration table to conduct oblique earthquake motion on the pipeline corridor. At present, there are three loading directions for vibration table tests: unidirectional, bidirectional, and tridirectional (front and back, left and right, up and down), but none of them can meet the oblique incidence of seismic waves. Therefore, it is particularly important to study equipment suitable for auxiliary vibration tables to simulate oblique earthquake waves.

[0010] To this end, a vibration table test simulation equipment for comprehensive pipeline corridor under the action of oblique incident waves is proposed. Based on the existing three-dimensional vibration table test, a test device is proposed which can more accurately simulate the oblique incidence of seismic motion on the comprehensive pipeline corridor. The corresponding connecting components and power devices are designed to effectively simulate and study the acceleration, displacement and other responses of the comprehensive pipeline corridor under the oblique incidence of seismic waves. Summary of the invention

[0011] The purpose of the present invention is to provide a vibration table test simulation device for an integrated pipeline corridor under the action of oblique incident waves in view of the defects of the prior art, so as to solve the problems raised by the above-mentioned background technology.

[0012] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a vibration table test simulation device for a comprehensive pipeline corridor under the action of oblique incident waves, comprising a shear box, a horizontal loading device is installed inside the shear box, and the inside of the shear box is filled with soil, one end of the horizontal loading device is connected to the bottom end surface of the pipeline corridor through a support seat, and the pipeline corridor is obliquely arranged in the shear box filled with soil, a circular tube is fixedly connected to the top end surface of the pipeline corridor, a steel bar is arranged inside the circular tube, one end of the steel bar is fixed on the pipeline corridor, the diameter of the circular tube is larger than the diameter of the steel bar, and the other ends of the circular tube and the steel bar both protrude out of the soil.

[0013] As a preferred technical solution of the present invention, a push rod is provided at one end of the horizontal loading device, one end of the push rod is connected to the connecting plate, the other end of the push rod is fixedly connected to the inner sleeve by an axial locking screw, and the anti-collision rubber is fixedly connected to the directional sleeve by a locking screw to prevent the transmission system from accidentally exceeding the stroke and hitting the lead screw nut; the directional sleeve is installed on the outer sleeve;

[0014] The outer sleeve is a covering tube used to protect the inner sleeve and the ball nut; the inner sleeve is fixedly connected to the ball nut, and the inner sleeve expands and contracts as the ball nut rotates; the rubber ring is sleeved on the inner sleeve above the ball nut to prevent the inner sleeve from colliding with the outer sleeve during vibration; the ball nut is connected to the screw thread.

[0015] As a preferred technical solution of the present invention, a reduction box is provided at the other end of the horizontal loading device, a motor is mounted on the reduction box, an output shaft is fixedly connected to the reduction gear in the reduction box, and the output shaft is connected to the lead screw through an elastic coupling.

[0016] As a preferred technical solution of the present invention, the elastic coupling is connected to the lead screw via a locking nut, a washer and a bearing.

[0017] As a preferred technical solution of the present invention, an outer sleeve is provided on the outside of the inner sleeve, one end of the outer sleeve is fixedly connected to the reduction box, the outer sleeve passes through the shear box and is installed on the inner wall of the shear box through a mounting block, a buffer spring is provided between the outer sleeve and the inner wall of the shear box, and one side of the reduction box is connected to the connecting block on the side of the shear box through a rope.

[0018] As a preferred technical solution of the present invention, the mounting block is composed of two layers of thin metal plates and a layer of rubber plate, the rubber plate is sandwiched between the two layers of thin metal plates, and a plurality of through holes are opened on the thin metal plate for shock absorption and noise reduction. The outer sleeve is fixed to the positioning block through a fixing plate and a cross rib plate, the positioning block is fixed to the mounting block through bolts B, and the mounting block is fixed to the inner wall of the shear box through bolts B.

[0019] As a preferred technical solution of the present invention, the connecting plate is connected to the support seat through a connecting mechanism, and the connecting mechanism is composed of an upper cover plate and a lower cover plate. The upper cover plate and the lower cover plate are connected by a pin shaft, and a butterfly spring is inserted on the pin shaft. A buffer block is arranged inside the upper cover plate, and leaf springs are installed at both ends of the buffer block.

[0020] As a preferred technical solution of the present invention, the upper cover plate is fixedly connected to the support seat by bolts A, and the lower cover plate is fixedly connected to the connecting plate by bolts A.

[0021] Compared with the prior art, the present invention has the following beneficial effects: in the present invention, a horizontal loading device is used to reduce the influence of gravity direction on structural response, and a ball joint support with flexible movement and vibration reduction is used to connect the horizontal loading device to the pipeline corridor, and metal sheets, rubber, springs and other components are used to reduce the influence of vibration on the accuracy of the horizontal loading device, thereby improving stability and safety, and the test can accurately simulate the oblique incidence effect of earthquake motion on the pipeline corridor. The present invention can effectively simulate and study the acceleration, displacement and other responses of the comprehensive pipeline corridor under the oblique incidence of seismic waves. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 One of the structural schematic diagrams of the connection between the horizontal loading device and the pipe gallery provided by the present invention;

[0023] Figure 2 The second structural schematic diagram of the connection between the horizontal loading device and the pipe gallery provided by the present invention;

[0024] Figure 3 A schematic diagram of the structure of the SV wave oblique incidence tube provided by the present invention;

[0025] Figure 4 A schematic diagram of the structure of the horizontal force loading device provided by the present invention;

[0026] Figure 5A schematic diagram of the structure of the angle measuring device provided by the present invention;

[0027] Figure 6 A diagram showing the connection structure between the horizontal loading device and the support seat provided by the present invention;

[0028] Figure 7 A diagram showing the connection structure between the horizontal loading device and the shear box provided by the present invention;

[0029] Figure 8 A schematic diagram of the structure of the connection between the horizontal loading device provided by the present invention and the inside of the shear box;

[0030] Fig. 9 It is a schematic structural diagram of three-dimensional oblique incidence of SV waves in the background technology of the present invention.

[0031] Indications in the figure: 100, shear box; 200, horizontal loading device; 300, pipe gallery; 400, round pipe; 500, steel bar; 1, axial locking screw nut; 2, bearing gland; 3. directional sleeve; 4, anti-collision rubber; 5, push rod; 6, connecting plate: 7, screw; 8, outer sleeve; 9, inner sleeve; 10, rubber ring; 11, ball nut; 12, locking nut and washer; 13, bearing; 14, elastic coupling; 15, motor; 16, output shaft; 17, reduction box; 18, ground surface; 19 , artificial boundary; 20, wave vibration surface at zero scale; 22, P wave; 23, SV wave A; 24, SV wave B; 26, rope; 27, support seat; 28, upper cover; 29, leaf spring; 30, bolt A; 31, lower cover; 32, buffer block; 33, cantilever beam end cover; 34, pin; 35, butterfly spring; 36, rubber sheet; 37, through hole; 38, thin metal plate; 39, positioning block; 40, bolt B; 41, fixing plate; 42, cross rib; 43, mounting block; 44, buffer spring. DETAILED DESCRIPTION

[0032] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0033] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are 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 and technical solutions in the embodiments may be combined with each other.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0036] like Figure 1-Figure 8 As shown, this embodiment proposes a vibration table test simulation device for a comprehensive pipeline corridor under the action of oblique incident waves, including a shear box 101, a horizontal loading device 200 is installed inside the shear box 101, and the inside of the shear box 100 is filled with soil, one end of the horizontal loading device 200 is connected to the bottom end surface of the pipeline corridor 300 through a support seat 27, and a horizontal force is applied to the pipeline corridor 300 by braking the horizontal loading device 200. The resultant force generated by the horizontal force and the gravity of the pipeline corridor 300 is perpendicular to the inclined surface of the inclined pipeline corridor 300, thereby ensuring that the pipeline corridor is placed horizontally. The force generated by 300 is the same, which ensures that the conditions of the inclined pipe gallery 300 and the horizontal pipe gallery 300 are the same during the test, and the pipe gallery 300 is inclinedly arranged in the shear box 100 filled with soil, and a round tube 400 is fixedly connected to the top surface of the pipe gallery 300, and a steel bar 500 is arranged inside the round tube 400, one end of the steel bar 500 is fixed on the pipe gallery 300, the diameter of the round tube 400 is larger than the diameter of the steel bar 500, and the other ends of the round tube 400 and the steel bar 500 are both extended out of the soil. The steel bar 500 can be used to calculate the inclination angle of the pipe gallery 300 in the shear box 101, as shown in FIG. Figure 5 shown.

[0037] A push rod 5 is provided at one end of the horizontal loading device 200, one end of the push rod 5 is connected to the connecting plate 6, the other end of the push rod 5 is fixedly connected to the inner sleeve 9 through an axial locking screw 1, and the anti-collision rubber 4 is fixedly connected to the directional sleeve 3 through a locking screw to prevent the transmission system from accidentally exceeding the stroke and hitting the lead screw nut; the directional sleeve 3 is installed on the outer sleeve 8;

[0038] The outer sleeve 8 is a covering tube used to protect the inner sleeve 9 and the ball nut 11; the inner sleeve 9 is fixedly connected to the ball nut 11, and the inner sleeve 9 expands and contracts as the ball nut 11 rotates; the rubber ring 10 is sleeved on the inner sleeve 9 above the ball nut 11 to prevent the inner sleeve 9 from colliding with the outer sleeve 8 during vibration; the ball nut 11 is threadedly connected to the lead screw 7.

[0039] The other end of the horizontal loading device 200 is provided with a reduction box 17, on which a motor 15 is installed. An output shaft 16 is fixedly connected to the reduction gear in the reduction box 17. The output shaft 16 is connected to the screw 7 through an elastic coupling 14 (the core part of the spring coupling is the spring, which is used to generate a torsion angle between the shafts, automatically adjust the deviation while transmitting torque, and alleviate the mutual vibration of the shafts. When the working load exceeds the design torque, the spring will produce elastic deformation to alleviate the impact of the load on the shaft and avoid wear and damage. At the same time, it can also change the stiffness of the spring and adjust the natural frequency of the shaft so that the vibration harmonic frequency of the system is within a certain range, thereby achieving a shock absorption effect). The motor 15 is used to rotate forward and reversely to drive the gears in the reduction box 17 to rotate, so that the output shaft 16 drives the screw 7 to rotate. The rotation of the screw 7 will drive the ball nut 9 to move, and the ball nut 9 and the inner sleeve 9 are fixed, so the push rod 5 will be pushed out, thereby pushing the pipe gallery 300.

[0040] The elastic coupling 14 is connected to the lead screw 7 through a locking nut, a washer 12 and a bearing 13 .

[0041] An outer sleeve 8 is provided on the outside of the inner sleeve 9, one end of the outer sleeve 8 is fixedly connected to the reduction box 17, the outer sleeve 8 passes through the shear box 100 and is installed on the inner wall of the shear box 100 through the mounting block 43, and a buffer spring 44 is provided between the outer sleeve 8 and the inner wall of the shear box 100 to play a shock-absorbing role. One side of the reduction box 17 is connected to the connecting block on the side of the shear box 100 through a rope 26 to play a stabilizing role. Because the bottom of the entire shear box 100 is a vibration table, it will generate vibration, so it is necessary to ensure the stability and balance of the horizontal loading device 200.

[0042] The mounting block 43 is composed of two layers of thin metal plates 38 and a layer of rubber plate 36. The rubber plate 36 is sandwiched between the two layers of thin metal plates 38. The thin metal plates 38 are provided with a number of through holes 37 for shock absorption and noise reduction. The outer cover 8 is fixed to the positioning block 39 through the fixing plate 41 and the cross rib plate 42. The positioning block 39 is fixed to the mounting block 43 through the bolt B40. The mounting block 43 is fixed to the inner wall of the shear box 100 through the bolt B40, which improves the overall stability of the connection between the horizontal loading device 200 and the shear box 100. The perforated metal plate can absorb vibration to a certain extent and reduce noise. The rubber in the middle can buffer the impact of vibration on the horizontal loading device 200, ensuring that the horizontal loading device 200 can dock with the support seat more accurately and provide horizontal force. The positioning block, cross rib plate and bolts are used to enable the horizontal loading device 200 to be accurately connected to the shear box 100 and stabilize the horizontal loading device 200.

[0043] The connecting plate 6 is connected to the support seat 27 through a connecting mechanism (the main function of the support seat 27 is to support, fix and keep the horizontal loading device in parallel, avoid vibration and displacement, and ensure the stability and accuracy of the equipment during movement). The connecting mechanism is composed of an upper cover plate 28 and a lower cover plate 31. The upper cover plate 28 and the lower cover plate 31 are connected by a pin shaft 34 (the pin shaft 34 is to limit the lateral movement of the hinge support). A butterfly spring 35 is inserted on the pin shaft 34. A buffer block 32 is arranged inside the upper cover plate 28 (the buffer block 32 is a device for reducing impact and vibration, and is made of a rubber block). Leaf springs 29 are installed at both ends of the buffer block 32 (the leaf spring 29 has shock absorption, support and load-bearing functions).

[0044] The upper cover plate 28 is fixedly connected to the support seat 27 by bolts A30, and the lower cover plate 31 is fixedly connected to the connecting plate 6 by bolts A30.

[0045] The specific working principle is that the device uses the rotational motion of the motor 15 to convert it into a linear motion. After the motor 15 is decelerated by the reduction gear, it drives the lead screw 7 to rotate, thereby driving the ball nut 11 on the lead screw 7 to move. The ball nut 11 is connected to the inner sleeve 9, thereby driving the inner sleeve 9 to move. The forward and reverse rotation of the motor 15 can control the ball nut 11 to drive the inner sleeve 9 to extend and retract, thereby driving the push rod 5 to extend and retract.

[0046] The elastic coupling 14 is connected with the spring around it, which can effectively reduce the impact between the shafts.

[0047] The fixed shaft is locked by a 90° gap between two positioning screws, and a force sensor is added to the front end of the horizontal loading device to adjust the speed of the motor 15 according to the magnitude of the force.

[0048] Before conducting the test, adjust the pipe gallery 300 to the required angle and insert it.

[0049] At this time, the angle between the pipe gallery 300 and the vertical direction changes. Therefore, the influence of its gravity on the test results also changes accordingly. At this time, a certain force is applied by the gravity compensation component to minimize the influence of gravity. The specific application process is as follows:

[0050] (1) The push rod needs to generate sufficient horizontal thrust to compensate for the gravity component caused by the inclination of the tunnel, such as Figure 3 . Calculate the required thrust based on the mass, inclination angle and gravity of the corridor:

[0051] F=m×g×tanθ (4)

[0052] (2) The thrust of the push rod is obtained by the servo motor driving the lead screw. The thrust can be calculated by the following formula:

[0053]

[0054] T: The output torque of the servo motor, in Newton-meter (N·m).

[0055] L: The lead of the screw, that is, the distance the screw advances per rotation, in meters (m)

[0056] Considering the influence of efficiency, in practical applications, the screw drive system is not an ideal system, and there are friction and other energy losses, so the mechanical efficiency of the system needs to be considered. The corrected thrust formula is:

[0057]

[0058] Where η represents the mechanical efficiency of the screw drive system (a value between 0 and 1)

[0059] (3) The spring torsional torque is related to the spring rotation angle, and the calculation formula is:

[0060] T=k×α (7)

[0061] Where, T: spring torsional torque, N·m

[0062] α: spring rotation angle, rad;

[0063] k: torsional stiffness of the spring, Nm / rad,

[0064]

[0065] Where: E: spring modulus; d: wire diameter, Dm: median diameter, N: effective number of turns, R: load arm, p: 3.1416.

[0066] Figure 1 and 2 For the connection structure between the horizontal loading device and the pipe gallery, first add a support seat at the bottom of the pipe gallery according to the size and load requirements of the bottom, and fix it with anchor bolts. The front end of the horizontal loading device is connected to the support seat through a connection mechanism composed of a buffer block, a cantilever connecting plate, bolts, a pin shaft, a spring assembly, etc. The connection mechanism can be rotated up and down slightly to facilitate the connection between the horizontal loading device and the support seat.

[0067] And because it can rotate, the front end of the horizontal loading device can vibrate with the pipe gallery to a certain extent, reducing the impact of damaging the connecting parts. In addition, a leaf spring is added to the buffer block to disperse the load, reduce the impact force caused by vibration, and improve the stability of the support.

[0068] The tail of the electric horizontal loading device is fixed to the hinge support on the right side of the shear box by a rope through a pin to reduce the impact of vibration on the horizontal loading device. A butterfly spring is added to the pin to enhance buffering and vibration absorption and prevent the bolts from loosening.

[0069] like Figure 3The figure shows a schematic diagram of an SV wave obliquely incident on a pipe gallery. The SV wave is incident on the pipe gallery at an oblique incident direction. According to Snell's law, a wave type conversion will occur on the interface, and the SV wave will be decomposed into a reflected wave (SV wave) with the same angle and a refracted wave (P wave) with a larger angle.

[0070] All technical features in this embodiment can be freely combined according to actual needs.

[0071] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A vibration table test simulation device for a utility tunnel under the action of oblique incident waves, comprising a shear box (100), characterized in that: A horizontal loading device (200) is installed inside the shear box (101), and the inside of the shear box (100) is filled with soil. One end of the horizontal loading device (200) is connected to the bottom end surface of the pipe gallery (300) through a support seat (27), and the pipe gallery (300) is arranged obliquely in the shear box (100) filled with soil. A circular tube (400) is fixedly connected to the top end surface of the pipe gallery (300), and a steel bar (500) is arranged inside the circular tube (400). One end of the steel bar (500) is fixed to the pipe gallery (300), the diameter of the circular tube (400) is larger than the diameter of the steel bar (500), and the other ends of the circular tube (400) and the steel bar (500) both protrude from the soil.

2. According to claim 1, a vibration table test simulation device for a utility tunnel under the action of oblique incident waves is characterized in that: A push rod (5) is provided at one end of the horizontal loading device (200), one end of the push rod (5) is connected to the connecting plate (6), the other end of the push rod (5) is fixedly connected to the inner sleeve (9) via an axial locking screw (1), and the anti-collision rubber (4) is fixedly connected to the directional sleeve (3) via a locking screw to prevent the transmission system from accidentally exceeding the stroke and colliding with the lead screw nut; the directional sleeve (3) is installed on the outer sleeve (8); The outer sleeve (8) is a covering tube used to protect the inner sleeve (9) and the ball nut (11); the inner sleeve (9) is fixedly connected to the ball nut (11), and the inner sleeve (9) is extended and retracted as the ball nut (11) rotates; the rubber ring (10) is sleeved on the inner sleeve (9) above the ball nut (11) to prevent the inner sleeve (9) from colliding with the outer sleeve (8) during vibration; and the ball nut (11) is threadedly connected to the lead screw (7).

3. The vibration table test simulation device for a utility tunnel under the action of oblique incident waves according to claim 2 is characterized in that: A reduction box (17) is provided at the other end of the horizontal loading device (200), a motor (15) is installed on the reduction box (17), an output shaft (16) is fixedly connected to the reduction gear in the reduction box (17), and the output shaft (16) is connected to the lead screw (7) through an elastic coupling (14).

4. The vibration table test simulation device for a utility tunnel under the action of oblique incident waves according to claim 3 is characterized in that: The elastic coupling (14) is connected to the lead screw (7) via a locking nut and a washer (12) and a bearing (13).

5. The vibration table test simulation device for a utility tunnel under the action of oblique incident waves according to claim 4 is characterized in that: An outer sleeve (8) is provided on the outer side of the inner sleeve (9), one end of the outer sleeve (8) is fixedly connected to the reduction box (17), the outer sleeve (8) passes through the shear box (100) and is installed on the inner wall of the shear box (100) through a mounting block (43), a buffer spring (44) is provided between the outer sleeve (8) and the inner wall of the shear box (100), and one side of the reduction box (17) is connected to a connecting block on the side of the shear box (100) through a rope (26).

6. The vibration table test simulation device for a utility tunnel under the action of oblique incident waves according to claim 5 is characterized in that: The mounting block (43) is composed of two layers of thin metal plates (38) and a layer of rubber plate (36), wherein the rubber plate (36) is sandwiched between the two layers of thin metal plates (38), and the thin metal plate (38) is provided with a plurality of through holes (37). The outer sleeve (8) is fixed to the positioning block (39) through a fixing plate (41) and a cross rib plate (42), and the positioning block (39) is fixed to the mounting block (43) through bolts B (40), and the mounting block (43) is fixed to the inner wall of the shear box (100) through bolts B (40).

7. The vibration table test simulation device for a utility tunnel under the action of oblique incident waves according to claim 2 is characterized in that: The connecting plate (6) is connected to the support seat (27) through a connecting mechanism, and the connecting mechanism is composed of an upper cover plate (28) and a lower cover plate (31). The upper cover plate (28) and the lower cover plate (31) are connected through a pin shaft (34), and a butterfly spring (35) is inserted on the pin shaft (34). A buffer block (32) is arranged inside the upper cover plate (28), and leaf springs (29) are installed at both ends of the buffer block (32).

8. The vibration table test simulation device for a utility tunnel under the action of oblique incident waves according to claim 7 is characterized in that: The upper cover plate (28) is fixedly connected to the support seat (27) via bolts A (30), and the lower cover plate (31) is fixedly connected to the connecting plate (6) via bolts A (30).

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