Slope earthquake damage analysis test device under coupling action of earthquake oscillation and bedrock dislocation

Abstract

The invention discloses a slope earthquake damage analysis test device under the coupling action of earthquake motion and bedrock dislocation. The slope earthquake damage analysis test device comprises an earthquake motion system and a bedrock fault dislocation system, the seismic motion system comprises a vibration table, a vibration table top, a vertical actuator and a horizontal actuator, and bidirectional seismic motion input is achieved. The bed rock fault dislocation system comprises a lifting box, a fixed box, a gradient adjusting actuator, a dip angle adjusting counter-force device and a pushing actuator, the gradient of a required side slope is achieved by jacking the lifting box through the gradient adjusting actuator, and relative dislocation of a fault is achieved by loading a movable bottom plate of the lifting box through the pushing actuator; the slope earthquake damage analysis test under the coupling action of earthquake motion and bedrock dislocation can be realized through the simultaneous work of the earthquake motion system and the bedrock dislocation system. According to the invention, the instability and deformation characteristics of the side slope under the coupling action of seismic oscillation and bed rock dislocation are simulated, and the gradient of the side slope and the inclination angle of the fault can be controlled.

Description

Technical Field

[0001] The invention relates to the technical field of large-scale slope model testing under earthquake action, and in particular to a slope earthquake damage analysis testing device under the coupling action of ground motion and bedrock dislocation. Background Art

[0002] A large number of earthquake damage surveys have shown that earthquake-induced slope instability and sliding is one of the main earthquake geological disasters in mountainous and hilly areas. Earthquake slope instability is characterized by wide distribution, large number and great harm, and has caused huge casualties and economic losses. The seismic motion energy near the strong earthquake fault zone is large, and the slopes are densely developed. In particular, the damage caused by the relative displacement of the fault or the relative movement of the two plates leading to the direct "cutting" of the slope is more serious. That is, the slope damage under the combined action of seismic motion and bedrock dislocation has become an urgent problem to be solved, and indoor model tests are one of the effective methods to explore earthquake slope instability.

[0003] At present, many scholars have the following deficiencies in their research on earthquake slope model tests: first, most methods place the slope model on a shaking table, without considering the impact of bedrock fault displacement or even multi-angle displacement on slope instability; second, the preparation of slope models with different slopes is cumbersome and complicated, and the performance in simulating real stress conditions is average; in addition, the slope model is small in size and cannot truly restore the slope damage and instability process under earthquake action. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of existing devices and provide a slope damage analysis test device under the coupling of earthquake motion and bedrock dislocation, so as to simulate the damage and instability of a slope with a certain slope under the action of earthquake motion and fault dislocation of different inclination angles, and promote the development and innovation of the dynamic theory of slope under earthquake action.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] The slope earthquake damage analysis test device under the coupling effect of earthquake motion and bedrock dislocation comprises an earthquake motion action system realized based on a shaking table and a bedrock fault dislocation system arranged on the shaking table.

[0007] The seismic action system includes a vibration table, a vibration table surface, a vertical actuator and a horizontal actuator. A plurality of vertical actuators are arranged on the lower surface of the vibration table surface, a horizontal actuator is arranged on one end of the vibration table surface, and the vertical actuator and the horizontal actuator are fixed on the vibration table; bidirectional seismic input is realized through the above components.

[0008] The bedrock fault displacement system is installed on the vibration table, and mainly includes a lifting box, a fixed box, a slope adjustment actuator, an inclination adjustment reaction device, and a push actuator. The fixed box is fixed on the vibration table, and the lifting box and the fixed box are hinged. The lifting box is provided with a slope adjustment actuator, and the required slope of the slope is achieved by lifting the lifting box through the slope adjustment actuator. The bottom plate of the lifting box is divided into a movable bottom plate and a fixed bottom plate. The relative displacement of the fault is achieved by loading the movable bottom plate of the lifting box through the push actuator.

[0009] Furthermore, the lifting box also includes a rear box plate and a pair of side panels; the movable bottom plate is located on the rear side, and the fixed bottom plate is located on the front side, and a certain gap is left between the movable bottom plate and the fixed bottom plate, the side panel and the rear box plate; high-strength angle steels are respectively provided at the four corners of the bottom of the movable bottom plate; the two ends of the fixed bottom plate are respectively fixedly connected to the side panels, and a bearing hinge interface is provided at the front end of the fixed bottom plate for hinged connection with the fixed box; a support bracket is provided on the side panel, and the support bracket is hinged to the slope adjustment actuator, and the bottom of the slope adjustment actuator is locked to the vibration table by high-strength bolts and nuts; the lifting ring is fixed to the steel ribs at the four corners of the upper part of the side panel.

[0010] Furthermore, the fixed box includes a front box plate, a fixed side panel, and a fixed box bottom plate. The front box plate, the fixed side panel, and the fixed box bottom plate are welded together as a whole and locked to the vibration table surface by high-strength bolts and nuts. The rear end of the fixed box bottom plate is provided with an articulated bearing device and is connected to the vibration table surface by high-strength bolts and nuts.

[0011] The front bearing hinge interface of the fixed bottom plate of the lifting box and the rear hinge bearing device of the fixed box bottom plate of the fixed box are hinged on the vibration table surface; the side panel of the lifting box is embedded in the fixed side panel of the fixed box.

[0012] Furthermore, four inclination adjustment reaction devices are locked on the vibration table surface and below the movable bottom plate of the lifting box by high-strength bolts and nuts, the four inclination adjustment reaction devices are provided with multi-angle holes, the bottoms of four push actuators are detachably connected to the multi-angle holes, and the top of the push actuator is detachably connected to the hinged joint at the bottom of the movable bottom plate of the lifting box.

[0013] By loading the lifting box with a slope adjustment actuator, slope models with different slopes can be simulated. The two ends of the high-strength fixed steel rod are fixed to the lifting box and the vibration table by high-strength bolts and nuts respectively; the dislocation test with fault inclination angles of 30°, 45°, 60° and 90° can be simulated through the inclination adjustment reaction device and the thrust actuator; the seismic damage analysis test of the slope under the coupling action of seismic motion and bedrock dislocation can be realized by the simultaneous operation of the seismic action system and the bedrock fault dislocation system installed on the vibration table.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention can realize slope model tests under the coupling effect of large-scale ground motion and bedrock dislocation, and can provide technical support for the seismic fortification of actual slope projects; the present invention can conveniently realize slope models with different slopes through a slope adjustment actuator, saving manpower and materials, and having high restoration and authenticity; the present invention can perform dislocations with different fault inclinations on the basis of a slope with a certain slope, and the operation is simple and the test conditions are rich; the test results of the device of the present invention can reveal the deformation mode and instability mechanism of the earthquake slope to a certain extent, and promote the development and innovation of the dynamic theory of cross-fault slopes under earthquake action. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the device of the present invention;

[0017] Figure 2 It is a schematic diagram of the structure of the lifting box in the device of the present invention;

[0018] Figure 3 It is a schematic diagram of the structure of the bottom plate of the lifting box in the device of the present invention;

[0019] Figure 4 It is a schematic diagram of the fixed box structure in the device of the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the angle adjustment reaction frame in the device of the present invention;

[0021] In the figure: 1. Vibration table; 2. Lifting box; 3. Fixed box; 4. Slope adjustment actuator; 5. Tilt adjustment reaction device; 6. Push actuator; 7. High-strength bolts and nuts; 8. High-strength fixed steel rods; 1-1. Vibration table surface; 1-2. Vertical actuator; 1-3. Horizontal actuator; 2-1. Rear box plate; 2-2. Side panel; 2-3. Movable bottom plate; 2-4. Fixed bottom plate; 2-5. High-strength angle steel; 2-6. Support bracket; 2-7. Lifting ring; 2-8. Bearing hinge interface; 2-9. Hinge head; 3-1. Front box plate; 3-2. Fixed side panel; 3-3. Fixed box bottom plate; 3-4. Articulated bearing device; 5-1. Multi-angle holes. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0023] like Figure 1-5As shown, the slope damage analysis test device under the coupling of earthquake motion and bedrock dislocation includes an earthquake motion system based on a vibration table 1 and a bedrock fault dislocation system arranged on the vibration table 1. The earthquake motion system includes a vibration table 1, a vibration table surface 1-1, a vertical actuator 1-2 and a horizontal actuator 1-3, and bidirectional earthquake motion input is realized through the above components. The bedrock fault dislocation system is arranged on the vibration table 1, and mainly includes a lifting box 2, a fixed box 3, a slope adjustment actuator 4, an inclination adjustment reaction device 5, and a push actuator 6. The required slope of the slope is achieved by lifting the lifting box 2 through the slope adjustment actuator 4, and the relative dislocation of the fault is achieved by loading the movable bottom plate 2-3 of the lifting box 2 through the push actuator 6.

[0024] like Figure 1-3 As shown, the lifting box 2 includes a rear box plate 2-1, a side panel 2-2, a movable bottom plate 2-3, a fixed bottom plate 2-4, a high-strength angle steel 2-5, a support bracket 2-6 and a lifting ring 2-7; a certain gap is left between the movable bottom plate 2-3 and the fixed bottom plate 2-4, the side panel 2-2 and the rear box plate 2-1, and is supported at the four corners of the bottom of the box by four high-strength angle steels 2-5; the fixed bottom plate 2-4 and the side panel 2-2 are welded as a whole, and a bearing hinge interface 2-8 is provided at the front end of the fixed bottom plate 2-4; the support brackets 2-6 on both sides of the lifting box 2 are welded and fixed to the steel ribs of the side panel 2-2, and the support brackets 2-6 are hinged to the slope adjustment actuator 4, and the bottom of the slope adjustment actuator 4 is locked on the vibration table 1-1 by high-strength bolts and nuts 7; the lifting ring 2-7 is welded to the steel ribs at the upper four corners of the side panel 2-2 of the lifting box 2.

[0025] The fixed box 3 includes a front box plate 3-1, a fixed side panel 3-2, and a fixed box bottom plate 3-3. The front box plate 3-1, the fixed side panel 3-2, and the fixed box bottom plate 3-3 are welded together as a whole and locked on the vibration table 1-1 by high-strength bolts and nuts 7. The rear end of the bottom plate of the fixed box 3 is provided with an articulated bearing device 3-4 and is connected to the vibration table 1-1 through high-strength bolts and nuts 7.

[0026] The front end bearing hinge interface 2-8 of the fixed bottom plate 2-4 of the lifting box 2 and the rear end hinge bearing device 3-4 of the fixed box bottom plate 3-3 of the fixed box 3 are hinged on the vibration table 1-1; the side panel 2-2 of the lifting box 2 is embedded in the fixed side panel 3-2 of the fixed box 3.

[0027] Furthermore, four inclination adjustment reaction devices 5 are locked on the vibration table 1-1 and below the movable bottom plate 2-3 of the lifting box 2 by high-strength bolts and nuts 7, and the four inclination adjustment reaction devices 5 are provided with multi-angle holes 5-1, and the bottoms of four push actuators 6 are detachably connected to the multi-angle holes 5-1, and the tops of the push actuators 6 are detachably connected to the hinged joint 2-9 at the bottom of the movable bottom plate 2-3 of the lifting box 2.

[0028] Furthermore, by loading the lifting box 2 with the slope adjustment actuator 4, slope models with different slopes can be simulated. The two ends of the high-strength fixed steel rod 8 are respectively fixed to the lifting box 2 and the vibration table 1-1 by high-strength bolts and nuts 7; the dislocation test with fault inclination angles of 30°, 45°, 60° and 90° can be simulated by the inclination adjustment reaction device 5 and the thrust actuator 6; the seismic action system and the bedrock fault dislocation system arranged on the vibration table 1 work simultaneously to realize the slope seismic damage analysis test under the coupling action of seismic motion and bedrock dislocation.

[0029] When using the slope earthquake damage analysis test device under the coupling effect of ground motion and bedrock dislocation of the present invention to conduct a test, the following steps are included:

[0030] S1. Fasten the assembled and welded fixed box 3 to the vibration table 1-1 by high-strength bolts and nuts 7, and connect the front end hinged bearing device 3-4 of the fixed box bottom plate 3-3 to the vibration table 1-1 by high-strength bolts and nuts 7.

[0031] S2. Weld and fix the support brackets 2-6 on both sides of the lifting box 2 to the steel ribs of the side panel 2-2, and connect them to the slope adjustment actuator 4. The bottom of the slope adjustment actuator 4 is locked on the vibration table 1-1 by high-strength bolts and nuts 7; place the movable bottom plate 2-3 stably on the high-strength angle steel 2-5, and the gaps between the movable bottom plate 2-3 and the fixed bottom plate 2-4, the side panel 2-2 and the rear box plate 2-1 are pasted with visible thick polyethylene plastic cloth; lift the lifting ring of the lifting box 2, and hinge the front end bearing hinge interface 2-8 of the fixed bottom plate 2-5 of the lifting box 2 and the front end hinged bearing device 3-4 of the fixed box bottom plate 3-3 of the fixed box 3 on the vibration table 1-1.

[0032] S3. Lift the lifting box 2 through the slope adjustment actuator 4 to reach the slope required for the slope model test, and fix the two ends of the high-strength fixed steel rod 8 to the lifting box 2 and the vibration table 1-1 through high-strength bolts and nuts 7 respectively; fill the lifting box 2 and the fixed box 3 with model soil or other models and arrange sensors until the expected height is reached.

[0033] S4. Tighten the four inclination adjustment reaction force devices 5 on the vibration table 1-1 through high-strength positioning bolts and nut locks 7; install the push actuator 6 according to the required fault displacement inclination angle.

[0034] S5. The vibration table 1 and the jacking hydraulic press 6 are operated simultaneously to realize the slope instability and destruction process under the coupling effect of the earthquake motion and the bedrock dislocation.

[0035] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope of the claims of the present invention.

Claims

1. The slope damage analysis test device under the coupling of ground motion and bedrock dislocation is characterized by: It comprises a seismic action system realized based on a vibration table (1) and a bedrock fault dislocation system arranged on the seismic action system; The seismic action system comprises a vibration table (1), a vibration table surface (1-1), a vertical actuator (1-2) and a horizontal actuator (1-3); a plurality of vertical actuators (1-2) are arranged on the lower surface of the vibration table surface (1-1); a horizontal actuator (1-3) is arranged at one end of the vibration table surface (1-1); the vertical actuator (1-2) and the horizontal actuator (1-3) are fixed on the vibration table (1); the seismic action system is used to realize bidirectional seismic input; The bedrock fault dislocation system comprises a lifting box (2) and a fixed box (3), wherein the fixed box (3) is fixed on a vibration table (1-1), the lifting box (2) and the fixed box (3) are hinged, and the lifting box (2) is provided with a slope adjustment actuator (4), and the required slope of the slope is achieved by lifting the lifting box (2) through the slope adjustment actuator (4); The bottom plate of the lifting box (2) is divided into a movable bottom plate (2-3) and a fixed bottom plate (2-4), and the relative displacement of the fault is achieved by loading the movable bottom plate (2-3) of the lifting box (2) with a push actuator (6).

2. The slope earthquake damage analysis test device under the coupling effect of ground motion and bedrock dislocation according to claim 1 is characterized by: The lifting box (2) further comprises a rear box plate (2-1) and a pair of side panels (2-2); the movable bottom plate (2-3) is located at the rear side, the fixed bottom plate (2-4) is located at the front side, and a certain gap is left between the movable bottom plate (2-3) and the fixed bottom plate (2-4), the side panels (2-2) and the rear box plate (2-1); The four corners of the bottom of the movable bottom plate (2-3) are respectively provided with high-strength angle steels (2-5); The two ends of the fixed bottom plate (2-4) are respectively fixedly connected to the side panels (2-2), and the front end of the fixed bottom plate (2-4) is provided with a bearing hinge interface (2-8) for hinge connection with the fixed box (3); A support bracket (2-6) is provided on the side panel (2-2), the support bracket (2-6) is hinged to the slope adjustment actuator (4), and the bottom of the slope adjustment actuator (4) is locked on the vibration table (1-1) through high-strength bolts and nuts (7); the lifting ring (2-7) is fixed on the steel ribs at the four corners of the upper part of the side panel (2-2).

3. The slope earthquake damage analysis test device under the coupling effect of ground motion and bedrock dislocation according to claim 2 is characterized by: The fixed box (3) comprises a front box plate (3-1), a fixed side panel (3-2), and a fixed box bottom plate (3-3). The front box plate (3-1), the fixed side panel (3-2), and the fixed box bottom plate (3-3) are fixedly connected to each other as a whole and are locked on the vibration table (1-1) by high-strength bolts and nuts (7). The rear end of the bottom plate of the fixed box (3) is provided with an articulated bearing device (3-4) for articulating with the front end bearing hinge interface (2-8) of the lifting box (2). The bottom plate of the fixed box (3) is connected to the vibration table (1-1) by high-strength bolts and nuts (7).

4. The slope damage analysis test device under the coupling of ground motion and bedrock dislocation according to claim 3 is characterized by: After the lifting box (2) is lifted, the side panel (2-2) of the lifting box (2) is embedded in the fixed side panel (3-2) of the fixed box (3).

5. The slope earthquake damage analysis test device under the coupling effect of ground motion and bedrock dislocation according to claim 1 is characterized by: The four tilt-angle adjustment reaction devices (5) are locked on the vibration table (1-1) by high-strength bolts and nuts (7) and are located below the movable bottom plate (2-3) of the lifting box (2). The four tilt-angle adjustment reaction devices (5) are provided with multi-angle holes (5-1). The bottoms of the four push actuators (6) are detachably connected to the multi-angle holes (5-1). The tops of the push actuators (6) are detachably connected to the hinged joint (2-9) at the bottom of the movable bottom plate (2-3) of the lifting box (2).

6. The slope earthquake damage analysis test device under the coupling effect of ground motion and bedrock dislocation according to claim 1 is characterized by: It also includes a high-strength fixed steel rod (8), the two ends of which are fixed to the lifting box (2) and the vibration table (1-1) respectively through high-strength bolts and nuts (7).

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