WO2021003689A1

WO2021003689A1 - Side slope in-situ loading device

Info

Publication number: WO2021003689A1
Application number: PCT/CN2019/095377
Authority: WO
Inventors: 郭捷; 马凤山; 赵海军; 李光; 冯雪磊; 刘国伟; 刘帅奇; 孙琪皓
Original assignee: 中国科学院地质与地球物理研究所
Priority date: 2019-07-10
Filing date: 2019-07-10
Publication date: 2021-01-14
Also published as: BE1026548A1; CN110553910A; BE1026548B1

Abstract

The present invention relates to the field of simulation experiment apparatuses, and in particular to a side slope in-situ loading device. The device comprises a model frame system, an axial loading device, a rainfall simulation system, and a servo control system, wherein a test model is arranged inside the model frame system, the axial loading device is fixedly mounted on the model frame system, the axial loading device is in a signal connection with the servo control system, and the rainfall simulation system is fixedly mounted on the model frame system. In this way, the model is fixed inside the model frame system, pressure is applied to a test piece by means of the axial loading device, pressurization under servo control is achieved by means of the servo control system, and a loading experiment test can be carried out on the model according to actual conditions to simulate actual working conditions of loading and rainfall, thereby implementing a side slope in-situ experiment.

Description

Side slope in-situ loading device

Technical field

The invention relates to the field of simulation experiment equipment, in particular to a slope in-situ loading device.

Background technique

At present, the slope in-situ loading device of the open-pit mine slope landslide test site can complete large-scale slope landslide test research under manual control and intervention, including: rock slope collapse and landslide disaster mechanism and prediction research; loose soil edge Research on the mechanism and prediction of landslide and debris flow; large-scale slope design, accident disaster engineering simulation, etc., to provide technical support for landslide disaster prevention.

Summary of the invention

The technical problem to be solved by the present invention is to provide a slope in-situ loading device to solve the problem of how to realize the in-situ test of the slope.

The technical solution of the present invention to solve the above technical problems is as follows: a slope in-situ loading device, including a model frame system, an axial loading device, a rainfall simulation system and a servo control system, the test model is set in the model frame system, so The axial loading device is fixedly installed on the model frame system, the axial loading device is signally connected with the servo control system, and the rainfall simulation system is fixedly installed on the model frame system.

Further, the model frame system includes a loading beam, a reaction beam, a front wall, a rear wall, a bearing bottom plate, and two side walls. The front wall, the side wall, the rear wall, and the side wall are sequentially spliced to form a frame structure. The load-bearing bottom plate is installed at the lower part of the frame structure, the two ends of the reaction beam are detachably connected to the two side walls, the loading beam is movably installed under the reaction beam, and the axial loading device It is installed on the reaction beam, the loading beam is fixedly connected to the axial loading device, and the rainfall simulation system is installed between the two side walls.

Further, the side wall includes a plurality of side wall splicing panels and a plurality of load-bearing columns, the lower end of the load-bearing column is installed on the load-bearing bottom plate, the upper end of the load-bearing column is fixedly connected with the load beam, and the side Wall splicing boards are spliced and installed between two adjacent bearing columns.

Further, the front wall includes a plurality of front wall splicing panels, and the plurality of front wall splicing panels are spliced in sequence to form a wall structure;

The rear wall includes a plurality of rear wall splicing boards, and the plurality of rear wall splicing boards are sequentially spliced to form a wall structure.

Further, the load-bearing bottom plate includes a reinforcing rib and a plurality of bottom plate bodies, and the plurality of bottom plate bodies are sequentially spliced and arranged on the outer surface of the reinforcing rib.

Further, it also includes a camera system, and the camera system is arranged on the reaction beam.

Further, the axial loading device includes a housing, a servo motor, a ball screw, a nut sleeve, a nut, a guide bearing sleeve, and a loading plate, and the ball screw, nut sleeve, nut, and guide bearing sleeve are all arranged on the Inside the housing, the housing is slidably arranged on the reaction beam, the servo motor is slidably arranged on the reaction beam, and the servo motor is drivingly connected to one end of the ball screw through a reducer, so The nut is screwed on the other end of the ball screw, the guide bearing sleeve is sleeved on the outside of the nut, the guide bearing sleeve is fixedly connected to the nut, and the loading plate is fixedly arranged on the guide bearing At the end of the sleeve, the nut sleeve is slidingly sleeved on the outer side of the guide bearing sleeve, the end of the nut sleeve is fixedly arranged on the loading beam, and a force sensor is arranged on the nut sleeve.

Further, it also includes an elevator, the elevator is fixedly installed on the bearing column, and the driving end of the elevator is fixedly connected with the housing.

Further, the rainfall simulation system includes a water storage tank, a booster pump, a pressure regulating valve, and multiple sets of nozzles, the multiple sets of nozzles are arranged on the model frame system, the booster pump is in communication with the water storage tank, and the The booster pump is in communication with the spray head through the pressure regulating valve, and the return hole of the pressure regulating valve is in communication with the water storage tank.

The invention provides an in-situ loading device for a side slope, which includes a model frame system, an axial loading device, a rainfall simulation system and a servo control system. The test model is arranged inside the model frame system, and the axial loading device is fixedly installed On the model frame system, the axial loading device is in signal connection with the servo control system, and the rainfall simulation system is fixedly installed on the model frame system. In this way, the model is fixed in the model frame system; and the test piece is pressurized by the axial loading device; the servo control pressurization is performed by the servo control system; the model can be tested according to the actual situation, and the actual load and rainfall can be simulated In order to realize the in-situ test of the slope.

Description of the drawings

FIG. 1 is a schematic diagram of the front view structure of a slope in-situ loading device according to an embodiment of the present invention;

Figure 2 is a schematic side view of the structure of Figure 1;

3 is a schematic diagram of the structure of a loading beam according to an embodiment of the present invention;

4 is a schematic diagram of a uniaxial loading device according to an embodiment of the present invention;

Figure 5 is a schematic diagram of a reaction beam according to an embodiment of the present invention;

Fig. 6 is a schematic diagram of a bearing column according to an embodiment of the invention;

FIG. 7 is a schematic diagram of a bottom plate structure according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a side wall structure according to an embodiment of the present invention;

Fig. 9 is a schematic structural diagram of a rainfall simulation system according to an embodiment of the present invention.

In the drawings, the list of parts represented by each number is as follows:

1. Loading beam, 2. Reaction beam, 3. Bearing column, 4. Back wall/front wall, 5. Side wall, 6. Bearing base plate, 7. Camera system, 8. Loading plate, 9. Ball screw, 10. Nut, 11, nut sleeve, 12, guide bearing sleeve, 13, force sensor, 14, elevator, 15, reducer, 16, servo motor, 17, nozzle, 18, water storage tank, 19, booster pump, 20 , Pressure regulating valve.

Detailed ways

The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples cited are only used to explain the present invention and not used to limit the scope of the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "center", "inner", "outer", "top", "bottom", etc. indicate the orientation or positional relationship based on the attachment The orientation or positional relationship shown in the figure is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a reference to the present invention. Limitations of the invention.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise clearly specified and limited. For example, they can be fixed or detachable. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present invention can be understood in specific situations.

As shown in Figures 1 to 9, the present invention provides a slope in-situ loading device, including a model frame system, an axial loading device, a rainfall simulation system, and a servo control system. The test model is set inside the model frame system. The axial loading device is fixedly installed on the model frame system, the axial loading device is signal connected with the servo control system, and the rainfall simulation system is fixedly installed on the model frame system. In this way, the model is fixed in the model frame system; and the test piece is pressurized by the axial loading device; the servo control pressurization is performed by the servo control system; the model can be tested according to the actual situation, and the actual load and rainfall can be simulated In order to realize the in-situ test of the slope.

The slope in-situ loading device of the present invention, as shown in Figures 1 to 9, on the basis of the technical solution described above, can also be: the model frame system includes a loading beam 1, a reaction beam 2, a front wall, The rear wall, the load-bearing floor 6 and two side walls 5, the front wall, the side wall 5, the rear wall, and the side wall 5 are successively spliced to form a frame structure, and the load-bearing floor 6 is installed at the lower part of the frame structure. The two ends of the reaction beam 2 are respectively detachably connected to the two side walls 5, the loading beam 1 is movably installed under the reaction beam 2, and the axial loading device is installed on the reaction beam 2 The loading beam 1 is fixedly connected to the axial loading device, and the rainfall simulation system is installed between the two side walls 5. A further preferred technical solution is: the side wall 5 includes a plurality of side wall 5 splicing plates and a plurality of bearing columns 3, the lower end of the bearing column 3 is installed on the bearing bottom plate 6, and the upper end of the bearing column 3 is The loading beam 1 is fixedly connected, and a plurality of splicing plates of the side wall 5 are spliced and installed between two adjacent bearing columns 3. In this way, the left and right side walls 5 each have 4 bearing columns 3 bolted to the bottom plate and reaction beam 2 to form an internal reaction force frame. The bearing columns 3 mainly bear the tensile force of the axial load and the model side drum. The horizontal bulging force.

The slope in-situ loading device of the present invention, as shown in Figures 1 to 9, on the basis of the technical solutions described above, can also be: the front wall includes a plurality of front wall splicing panels, and a plurality of the front wall The splicing boards are spliced in sequence to form a wall structure;

The rear wall includes a plurality of rear wall splicing boards, and the plurality of rear wall splicing boards are sequentially spliced to form a wall structure. In this way, the back wall and the side wall 5 are welded together and connected with the bearing column 3 and the bottom plate. The inner side contacting the model adopts a transparent plexiglass plate with a thickness of 35mm, and the plexiglass plate is installed on the inner side steel of the wall by screws.

The slope in-situ loading device of the present invention, as shown in Figures 1 to 9, on the basis of the technical solutions described above, can also be: the load-bearing bottom plate 6 includes reinforcing ribs and multiple bottom plate bodies, The bottom body is sequentially spliced and arranged on the outer surface of the reinforcing rib. In this way, the bottom plate is assembled separately and bears the axial stress brought by the model. Because the stress distribution is uneven when the side model is loaded, the stress gradually decreases from the position close to the back wall, so the distribution of the ribs during structural welding is also Uneven, maximize the utilization of materials and the rationality of the structure.

The slope in-situ loading device of the present invention, as shown in Figures 1 to 9, on the basis of the technical solution described above, it can also include a camera system 7, which is arranged on the reaction beam 2 on. In this way, the camera system 7 can perform real-time monitoring during the loading process of the model.

The slope in-situ loading device of the present invention, as shown in Figs. 1-9, can also be based on the technical solution described above: the axial loading device includes a housing, a servo motor 16, a ball screw, The nut sleeve 11, the nut 10, the guide bearing sleeve 12 and the loading plate 8, the ball screw, the nut sleeve 11, the nut 10 and the guide bearing sleeve 12 are all arranged inside the housing, and the housing is slidingly arranged On the reaction beam 2, the servo motor 16 is slidably arranged on the reaction beam 2, the servo motor 16 is drivingly connected to one end of the ball screw through a reducer 15, and the nut 10 is screwed on the At the other end of the ball screw, the guide bearing sleeve 12 is sleeved on the outer side of the nut 10, the guide bearing sleeve 12 is fixedly connected to the nut 10, and the loading plate 8 is fixedly arranged on the guide bearing At the end of the sleeve 12, the nut sleeve 11 is slidingly sleeved outside the guide bearing sleeve 12, the end of the nut sleeve 11 is fixedly arranged on the loading beam 1, and the nut sleeve 11 is provided with a force sensor 13 . A further preferred technical solution is to further include an elevator 14 which is fixedly installed on the bearing column 3, and the driving end of the elevator 14 is fixedly connected to the housing. In this way, the axial loading device includes a reducer 15, a loading beam 1, a loading plate 8, and a screw structure. The loading beam 1 has a hole in the middle to install a screw ball structure. The loading beam 1 can be driven by the screw lift 14 to 1.6 Slide freely within a meter range, and adjust the loading position according to the actual situation during the test; the axial loading device uses a reducer 15 to drive the ball screw 9 pairs of structures, the screw rotates the nut 10 to move vertically, and the nut 10 is connected to the loading plate 8 for the model For loading, there is a force sensor 13 at the front end of the nut sleeve 11, which transmits the real-time loading data to the servo control system.

The slope in-situ loading device of the present invention, as shown in Figures 1 to 9, on the basis of the technical solution described above, can also be: the rainfall simulation system includes a water storage tank 18, a booster pump 19, and a pressure regulating valve 20 and multiple sets of spray heads 17, the multiple sets of spray heads 17 are arranged on the model frame system, the booster pump 19 is in communication with the water storage tank 18, and the booster pump 19 is connected to the pressure regulating valve 20 The spray head 17 is in communication, and the return hole of the pressure regulating valve 20 is in communication with the water storage tank 18. In this way, the rainfall simulation system consists of a water storage tank 18, a booster pump 19, a pressure regulating valve 20, a water supply pipeline, a nozzle 17 and pressure and flow meters. It can simulate a rainfall test and control the system flow by adjusting the system pressure.

Slope in-situ loading device, including model frame system, axial loading device, rainfall simulation system, and servo control system system. The largest model is a rectangular parallelepiped with a length of 6.5 meters, a width of 5 meters, and a height of 5 meters. The loading method is motor servo To control the axial load, the axial load device adopts a reducer 15 to drive the ball screw 9 pairs of structures, the screw rotates the nut 10 to move vertically, the nut sleeve 11 has a force sensor 13 at the front end, and transmits the real-time load data to the control system. The driving source is Panasonic servo motor 16. Servo motor 16 is 2KW, reducer 15 is KF97R77 combined large reduction ratio series, ball screw 9 is a large load screw with a diameter of 160mm, the loading capacity of a single group of loading mechanism is 2000KN, there are 10 groups in total, and the total loading capacity is 20,000KN.

As shown in the figure, the slope in-situ loading device of the embodiment of the present invention includes a model frame system, an axial loading device, a rainfall simulation system, and a servo control system; wherein the slope model is pre-built in the frame, and the model can be a potential Landslide or collapse rock and soil model; and load the model through the loading device. The top of the frame system is an axial loading device and a rainfall simulation system. The loading device is mainly located in the second half of the frame system, which corresponds to the condition of applying load to the top part of the slope model. The rainfall simulation system is located in the second half of the frame system, corresponding to the application of rainfall to the slope of the slope model. Working conditions, as shown in the figure, the loading device mainly includes a reducer 15, a loading beam 1, a loading plate 8, and a ball screw 9. The ball screw 9 passes through the loading beam 1 through perforations, the elevator 14 is connected to the outside of the screw through bolts, the servo motor 16 controls the reducer 15 to drive the ball screw 9 sub-structure, the screw rotates the nut 10 to move vertically, and the nut sleeve 11 The force sensor 13 transmits the real-time load data back to the control system. The loading beam 1 can be adjusted up and down within a range of 1.6 meters under the control of the elevator 14. As shown in the figure, the loading system has 10 groups, which can be controlled separately or loaded simultaneously. The rainfall simulation system is composed of water storage tank 18, booster pump 19, pressure regulating valve 20, water supply pipeline, nozzle 17 and pressure and flow meters. Simulate rainfall test while loading or before and after loading, and adjust the system pressure To control the system flow. The spray head 17 is fixed at the front of the top of the frame system. The water storage tank 18, booster pump 19, pressure regulating valve 20 and water supply pipeline are fixed on the outside of the frame. Tap water is stored in the water tank 18 in advance, and the pressure is reduced by the booster pump 19 Pressurize to the required value, turn on the switch and spray to the top of the model through the spray port, the maximum pressure is 0.3mpa, and the maximum flow is 4 cubic meters per hour. Through the above devices, the simulation of the slope instability process under different loading and rainfall conditions can finally be realized.

As shown in Figure 1 to Figure 9, the loading beam 1 is made of 100mm high-quality carbon structural steel Q345 welded and processed, with a length of 7 meters, a height of 1.5 meters, and a thickness of 0.6 meters. There are reinforcing ribs inside, and the net weight is about 23.5 tons, at 20000KN. The strength and rigidity of the beam itself can be guaranteed under the loading conditions. Two reaction beams 2 are installed above the loading beam 1, and are connected to the load-bearing column 3 by bolts. The length is 7.1 meters, the width is 1 meter, and the thickness is 0.5 meters. It has a 50mm steel plate welded structure, internal reinforcement ribs, and a local dense structure. The net weight is about 10 tons. Within 1.6 meters of the working surface of the loading beam 1, the bearing capacity of a single reaction beam 2 is 10000kn.

As shown in Figure 1 to Figure 9, a total of 8 load-bearing columns 3 on the left and right walls 5 are welded with 1000x300mm H-shaped steel. When an axial load of 20,000 KN is loaded, a total of 4 load-bearing columns 3 provide reaction force for the load beam 1. The average force of a single bearing column 3 is 5000KN.

As shown in Figure 1 to Figure 9, the bottom plate bears the axial stress caused by the model. Because the stress distribution is uneven when the edge model is loaded, the stress gradually decreases from the position close to the back wall forward, so the distribution of the ribs during structural welding is also Uneven, maximize the utilization of materials and the rationality of the structure. If the size of the whole bottom plate is too large, it will be difficult to transport it. The split structure design is adopted and assembled into a whole after arriving on site. The size of the bottom plate is 7100*7000*500mm.

As shown in Figure 1 to Figure 9, the rear wall and side wall 5 are welded by 50B I-shaped, which are connected to the load-bearing column 3 and the bottom plate. The maximum height is 5.5 meters, which exceeds the height of the model by 0.5 meters and the thickness is 0.5 meters. The inner side in contact with the model adopts a 35mm-thick transparent plexiglass plate, which is installed on the inner section steel of the wall by screws.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection of the present invention. Within range.

Claims

A slope in-situ loading device, which is characterized in that it comprises a model frame system, an axial loading device, a rainfall simulation system and a servo control system. The test model is set inside the model frame system, and the axial loading device is fixedly installed On the model frame system, the axial loading device is in signal connection with the servo control system, and the rainfall simulation system is fixedly installed on the model frame system.
The slope in-situ loading device according to claim 1, characterized in that: the model frame system includes a loading beam (1), a reaction beam (2), a front wall, a rear wall, a bearing bottom plate (6) and two Block side wall (5), the front wall, side wall (5), rear wall, and side wall (5) are spliced in sequence to form a frame structure, and the load-bearing bottom plate (6) is installed at the lower part of the frame structure. The two ends of the reaction beam (2) are respectively detachably connected with the two side walls (5), the loading beam (1) is movably installed under the reaction beam (2), and the axial loading device is installed On the reaction beam (2), the loading beam (1) is fixedly connected with the axial loading device, and the rainfall simulation system is installed between the two side walls (5).
The slope in-situ loading device according to claim 2, characterized in that: the side wall (5) includes a plurality of side wall (5) splicing plates and a plurality of load-bearing columns (3), and the load-bearing column (3) ) The lower end is installed on the load-bearing bottom plate (6), the upper end of the load-bearing column (3) is fixedly connected with the load beam (1), and multiple splicing plates of the side walls (5) are spliced and installed on two adjacent Between the bearing columns (3).
The slope in-situ loading device according to claim 3, wherein the front wall comprises a plurality of front wall splicing panels, and the plurality of front wall splicing panels are spliced in sequence to form a wall structure;

The rear wall includes a plurality of rear wall splicing boards, and the plurality of rear wall splicing boards are sequentially spliced to form a wall structure.
The slope in-situ loading device according to claim 4, characterized in that: the load-bearing bottom plate (6) comprises a reinforcing rib and a plurality of bottom plate bodies, and a plurality of the bottom plate bodies are sequentially spliced and arranged to cover the reinforcing ribs. The outer surface.
The slope in-situ loading device according to claim 2, characterized in that it further comprises a camera system (7), and the camera system (7) is arranged on the reaction beam (2).
The slope in-situ loading device according to claim 2, characterized in that the axial loading device includes a housing, a servo motor (16), a ball screw, a nut sleeve (11), a nut (10), and a guide The bearing sleeve (12) and the loading plate (8), the ball screw, the nut sleeve (11), the nut (10) and the guide bearing sleeve (12) are all arranged inside the housing, and the housing is slidingly arranged On the reaction beam (2), the servo motor (16) is slidably arranged on the reaction beam (2), and the servo motor (16) is connected to the ball screw via a reducer (15) One end is driven and connected, the nut (10) is screwed on the other end of the ball screw, the guide bearing sleeve (12) is sleeved on the outside of the nut (10), and the guide bearing sleeve (12) Fixedly connected with the nut (10), the loading plate (8) is fixedly arranged at the end of the guide bearing sleeve (12), and the nut sleeve (11) is slidingly sleeved on the guide bearing sleeve (12) ) Outside, the end of the nut sleeve (11) is fixedly arranged on the loading beam (1), and a force sensor (13) is arranged on the nut sleeve (11).
The slope in-situ loading device according to claim 7, characterized in that it further comprises an elevator (14), the elevator (14) is fixedly installed on the load-bearing column (3), and the elevator (14) The driving end is fixedly connected with the housing.
The slope in-situ loading device according to claim 1, characterized in that: the rainfall simulation system includes a water storage tank (18), a booster pump (19), a pressure regulating valve (20) and multiple sets of nozzles (17) , The multiple sets of nozzles (17) are arranged on the model frame system, the booster pump (19) is in communication with the water storage tank (18), and the booster pump (19) passes through the pressure regulating valve (20) is in communication with the spray head (17), and the return hole of the pressure regulating valve (20) is in communication with the water storage tank (18).