Karst Collapse Simulation Experiment System Based on Simulations of Multiple Geological Conditions

Abstract

The present invention provides a karst collapse simulation experiment system based on the simulation of various geological conditions, belonging to the technical field of karst collapse simulation experiments. It includes a test box, a karst foundation, a weak interlayer, a cave, an ultimate bearing capacity simulation unit, a classification collection unit, a saw, a first moving component, a rotating component, and a second moving component. A karst foundation with a cave and a weak interlayer is placed in the test box to simulate a construction site. The ultimate bearing capacity simulation unit damages the upper end surface of the karst foundation, thereby conducting an ultimate bearing capacity simulation experiment on the karst foundation located in the test box. Then, the second moving component drives the saw to move to adjust the cutting position of the saw, the rotating component drives the saw to rotate to adjust the cutting angle of the saw, and the first moving component drives the saw to move to cut the karst foundation through the saw. After the classification collection unit pushes away the damaged part of the karst foundation after cutting, it recovers the intact part of the karst foundation after cutting and prepares a new karst foundation therefrom.

Description

Technical Field

[0001] The present invention belongs to the technical field of karst collapse simulation experiments, and particularly relates to a karst collapse simulation experimental system based on simulation of various geological conditions. Background Art

[0002] There are a large number of karst strata in the southwestern region of China. There are numerous karst caves distributed in the karst strata. There is usually a certain thickness of overburden above the roof of the karst cave. Under the action of the load above the overburden, the karst cave is prone to collapse, which brings challenges to the engineering safety construction and operation in karst areas. The collapse of the karst cave is the common instability and failure of the collapsed rock mass of the karst cave and the overburden soil mass, and its mechanical mechanism is relatively complex. The problem of karst cave collapse is a difficult problem in the foundation treatment of karst areas.

[0003] In practice, due to the presence of clayey rock strata, thin mudstone layers or weak interlayers formed by weathering, leaching, interlayer shear or fault dislocation in karst, usually there is a certain inclination angle between the weak interlayer and the karst. The inclination angles of the weak interlayers in karst with different terrains are different, thus forming karst with various geologies. During the actual research process of karst collapse with weak interlayers of different inclination angles, due to the difficult survey of the on-site terrain, the research on karst collapse with weak interlayers of different inclination angles is usually carried out through simulation experiments indoors.

[0004] The simulation experiment of the research on karst collapse with weak interlayers of different inclination angles indoors is usually to first make a karst foundation containing a soft interlayer in a mold, and then remove the mold and take out the karst foundation containing the soft interlayer, and conduct a karst collapse simulation experiment by applying a load to the karst foundation.

[0005] The Chinese invention patent with the publication number of "CN105862703B" discloses "an in-situ test method and test device for the bearing capacity of subgrades in karst areas". When the invention is in the working state, the mast is pushed by a hydraulic cylinder and the position can be adjusted through a luffing mechanism. The test device operates a steel wire rope through its hoisting system. The steel wire rope is arranged to pass through a pulley on the hanging anchor frame and pull the impact hammer in the vertical direction. During operation, the impact hammer is manipulated by a power mechanism to conduct impact load tests. However, when it is necessary to conduct indoor simulations on karst foundations with weak interlayers of different inclination angles respectively, a part of the karst foundation after being damaged by impact is damaged, and the other part is intact. At this time, it is necessary to separate the intact part and the damaged part to make the karst foundation again for the intact part, while this invention can only conduct impact tests on karst.

[0006] Therefore, its deficiency lies in that when it is necessary to conduct indoor simulations on karst foundations with weak interlayers of different inclination angles respectively, this invention cannot separate and process the intact part and the damaged part of the karst foundation after damage. Summary of the Invention

[0007] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a karst collapse simulation experiment system based on the simulation of various geological conditions, which is used to solve the problem in the prior art that it is impossible to separate the intact part and the damaged part of the karst foundation after damage.

[0008] To achieve the above object and other related objects, the present invention provides a karst collapse simulation experiment system based on the simulation of various geological conditions. The simulation experiment system includes:

[0009] A test box, a karst foundation, a weak interlayer and a cave. The karst foundation is located inside the test box. The cave is located inside the karst foundation and penetrates through the side walls on both sides in the width direction of the karst foundation. The weak interlayer is located inside the karst foundation and intersects with the cave. The weak interlayer is perpendicular to the side walls in the width direction of the karst foundation. The degree of the acute angle formed by the weak interlayer and the lower end face of the karst foundation is a°.

[0010] A ultimate bearing capacity simulation unit, which includes a pressing plate. The pressing plate is located directly above the cave. The pressing plate can move along the height direction of the karst foundation. The pressing plate applies a load to the upper end face of the karst foundation to damage the upper end face of the karst foundation.

[0011] A cutting unit, which includes a saw, a first moving component, a rotating component and a second moving component. The saw is arranged at the moving end of the first moving component. The first moving component is arranged at the rotating end of the rotating component. The rotating component is rotatably installed at the moving end of the second moving component. The saw cuts the karst foundation along the moving direction of the first moving component. The cutting surface of the karst foundation is located below the damaged part of the karst foundation. The degree of the acute angle formed by the cutting surface and the lower end face of the karst foundation is b°, and b° ≤ a°.

[0012] As an optional solution, the ultimate bearing capacity simulation unit further includes a first telescopic power source, a first mounting plate, a first sliding groove and a second telescopic power source;

[0013] The extending end of the first telescopic power source is fixedly connected to the pressing plate. The pressing plate moves along the height direction of the karst foundation under the action of the first telescopic power source;

[0014] The fixed end of the first telescopic power source is fixedly connected to the first mounting plate. The first sliding groove is horizontally opened on the side wall of the test box. The sliding guiding direction of the first sliding groove is parallel to the length direction of the test box. The first mounting plate can slide along the sliding guiding direction of the first sliding groove;

[0015] The extending end of the second telescopic power source is fixedly connected to the first mounting plate, and the fixed end of the second telescopic power source is fixedly connected to the test box. Under the action of the second telescopic power source, the first mounting plate slides along the sliding guiding direction of the first chute, so as to extend the pressing plate into or out of the position directly above the karst foundation.

[0016] As an alternative, the first moving assembly includes a first rotating power source, a third telescopic power source, a first mounting block and a second chute;

[0017] The rotating end of the first rotating power source is fixedly connected to the electric saw, the rotation axis of the first rotating power source is parallel to the width direction of the karst foundation, and the first rotating power source adjusts the cutting angle of the electric saw.

[0018] The extending end of the third telescopic power source is fixedly connected to the fixed end of the first rotating power source. The telescopic axis of the third telescopic power source is perpendicular to the rotation axis of the first rotating power source. The fixed end of the third telescopic power source is fixedly connected to the first mounting block. A second chute is formed in the first mounting block. The sliding guiding direction of the second chute is perpendicular to the rotation axis of the first rotating power source, and the extending end of the third telescopic power source telescopically moves in the second chute.

[0019] As an alternative, the rotating assembly includes a turntable, a second mounting block, a first gear, a second gear and a second rotating power source;

[0020] One end of the turntable close to the karst foundation is fixedly connected to the first mounting block. The other end of the turntable away from the karst foundation is rotatably arranged in the second mounting block. The rotation axis of the turntable is parallel to the rotation axis of the first rotating power source. A first gear is fixedly connected to the turntable. The rotation axis of the first gear is consistent with the rotation axis of the turntable. The second rotating power source is fixedly installed on the second mounting block. The rotation axis of the second rotating power source is parallel to the rotation axis of the first rotating power source. A second gear is fixedly connected to the rotating end of the second rotating power source, and the second gear meshes with the first gear.

[0021] As an alternative, the second moving assembly includes a fourth telescopic power source, a collection box and a third chute;

[0022] The collection box is located on one side in the width direction of the test box, and the side wall of the collection box close to the test box is communicated. The collection box collects the damaged parts after cutting the karst foundation.

[0023] The third chute is horizontally formed in the side wall of the collection box. The sliding guiding direction of the third chute is perpendicular to the rotation axis of the turntable, and the second mounting block can slide along the sliding guiding direction of the third chute.

[0024] The extending end of the fourth telescopic power source is fixedly connected to the second mounting block, and the fixed end of the fourth telescopic power source is fixedly connected to the collection box. Under the action of the fourth telescopic power source, the second mounting block slides along the sliding guiding direction of the third chute.

[0025] As an alternative, the simulation experiment system further includes a fifth telescopic power source, a bearing plate, a baffle, a second mounting plate, a fourth chute, and an opening;

[0026] The bearing plate is located inside the test box, and the karst foundation is placed on the bearing plate. The extending end of the fifth telescopic power source is fixedly connected to the bearing plate. The telescopic axis of the fifth telescopic power source is parallel to the height direction of the karst foundation. The fixed end of the fifth telescopic power source is fixedly connected to the ground. Under the action of the fifth telescopic power source, the bearing plate moves up and down along the height direction of the karst foundation;

[0027] An opening is provided on the side wall of the test box on the side away from the cutting unit. The height of the opening is the same as the height of the karst foundation. Fourth chutes are horizontally provided on both the upper and lower end faces of the opening. The sliding guiding direction of the fourth chute is parallel to the length direction of the test box. The second mounting plate is installed in the fourth chute, and the second mounting plate can slide in the opening through the fourth chute to open or close the end face of the test box on the side away from the cutting unit;

[0028] The baffle is fixedly connected to the bearing plate. The baffle is located on the side wall of the bearing plate close to the cutting unit. The upper end face of the baffle is higher than the upper end face of the bearing plate, and the baffle is located at one end of the bearing plate in the length direction away from the ultimate bearing capacity simulation unit;

[0029] A simulation experiment space for the karst foundation is formed among the side walls on both sides in the length direction of the test box, the side wall of the baffle close to the second mounting plate, the upper end face of the bearing plate, and the side wall of the second mounting plate close to the baffle.

[0030] As an alternative, the simulation experiment system further includes a classification and collection unit, and the classification and collection unit includes a push-pull plate, a third mounting block, a sixth telescopic power source, and a seventh telescopic power source;

[0031] The push-pull plate is cylindrical, and the central axis of the push-pull plate is parallel to the width direction of the test box. The diameter of the push-pull plate is the same as the diameter of the karst cave. A circular groove is provided on the side wall of the second mounting plate close to the sixth telescopic power source. The diameter of the circular groove is the same as the diameter of the karst cave, and the central axis of the circular groove is parallel to the central axis of the push-pull plate and is located on the same horizontal plane. The push-pull plate can move along the width direction of the karst foundation and extend into the circular groove;

[0032] The extended end of the sixth telescopic power source is fixedly connected to one end of the push-pull plate, the diameter of the extended end of the sixth telescopic power source is smaller than the diameter of the push-pull plate, the telescopic axis of the sixth telescopic power source is parallel to the width direction of the test box, and the push-pull plate can be extended into or moved out of the circular groove under the action of the sixth telescopic power source;

[0033] The fixed end of the seventh telescopic power source is horizontally mounted on the third mounting block, the third mounting block is fixedly connected to the ground, the extended end of the seventh telescopic power source is fixedly connected to the fixed end of the sixth telescopic power source, the telescopic axis of the seventh telescopic power source is parallel to the sliding guide direction of the fourth slide groove, and the sixth telescopic power source moves along the sliding guide direction of the fourth slide groove at the left and right bottom of the seventh telescopic power source, so that when the push-pull plate extends into the circular groove, the second mounting plate is driven by the push-pull plate to move along the sliding guide direction of the fourth slide groove to open or close the end surface of the test box away from the cutting unit;

[0034] The push-pull plate can push away the damaged part of the karst foundation after cutting under the action of the sixth telescopic power source, and the push-pull plate can recover the intact part of the karst foundation after cutting under the reverse action of the sixth telescopic power source.

[0035] As an optional solution, the classification and collection unit further includes a transfer plate, a handle and a slide rail;

[0036] The opposite end faces of the test box and the third mounting block are both provided with sliding rails, the sliding guide direction of the sliding rails is parallel to the sliding guide direction of the fourth slide groove, a transfer plate is slidably installed between the two slide rails, the upper end face of the transfer plate is flush with the lower end face of the opening, the transfer plate receives the intact part of the karst foundation after cutting, a handle is fixed to one end of the transfer plate, and the transfer plate moves along the sliding guide direction of the slide rail driven by the handle.

[0037] As an optional solution, the simulation experiment system further includes a sliding door and an eighth telescopic power source;

[0038] The sliding door is arranged on the side wall on one side of the collection box in the length direction, the protruding end of the eighth telescopic power source is fixedly connected to the sliding door, the telescopic direction of the eighth telescopic power source is parallel to the width direction of the collection box, and the sliding door moves under the action of the eighth telescopic power source to open or close the collection box.

[0039] As an optional solution, the simulation experiment system further includes a camera;

[0040] The camera is installed on the end surface of the turntable close to the karst foundation, and the camera collects image data of the damage situation of the karst foundation.

[0041] As described above, the karst collapse simulation experimental system based on the simulation of various geological conditions of the present invention has at least the following beneficial effects:

[0042] 1. When the present invention conducts a collapse simulation experiment on a karst foundation with a soft interlayer, the pressing plate destroys the upper end surface of the karst foundation under the action of the first telescopic power source. At this time, the upper part of the karst foundation is damaged, and the lower part is intact. According to the damage condition of the karst foundation, the second mounting block drives the electric saw to move to the specified cutting position under the telescopic action of the fourth telescopic power source. The fifth telescopic power source moves the karst foundation up and down to the specified position through the bearing plate. The turntable drives the electric saw to move to the specified cutting angle under the rotation of the second rotary power source. The electric saw rotates under the action of the first rotary power source until the cutting blade is parallel to the telescopic direction of the third telescopic power source. Then the electric saw starts and moves along the sliding guiding direction of the second chute under the action of the third telescopic power source to cut the karst foundation. After cutting, the intact part and the damaged part of the karst foundation are separated from each other, so as to facilitate the preparation of a new karst foundation from the intact part after cutting the karst foundation.

[0043] 2. When the electric saw of the present invention cuts the karst foundation, the electric saw slides along the sliding guiding direction of the second chute under the drive of the third telescopic power source. The second chute restricts the third telescopic power source to move only along the sliding guiding direction of the second chute, so as to ensure that the cutting trajectory of the electric saw on the karst foundation is a stable plane.

[0044] 3. The present invention tightly adheres the side walls around the karst foundation placed on the bearing plate through the side walls, baffles and second mounting plates on both sides in the length direction of the test box, so as to ensure that the karst foundation will not shake during the subsequent ultimate bearing capacity simulation experiment and cutting of the karst foundation. And if it is necessary to cut the lower part of the karst foundation, the fifth telescopic power source extends and pushes the karst foundation upward through the bearing plate to cooperate with the cutting trajectory of the electric saw, so as to be able to cut the lower position of the karst foundation by the electric saw.

[0045] 4. After the karst foundation of the present invention is cut, it is divided into a sound part and a damaged part. The damaged part is located above the sound part. The push-pull plate pushes the damaged part into the collection box for collection under the extension of the sixth telescopic power source. When pushing out, since the side walls on both sides in the length direction of the test box and the upper end surface of the bearing plate are closely attached to the karst foundation, and the baffle is closely attached to the sound part of the karst foundation, the sound part will not move in the test box when the damaged part is pushed into the collection box. Then, the push-pull plate can pull back the sound part under the retraction of the sixth telescopic power source. When pulling back, the side wall of the extended end of the sixth telescopic power source is closely attached to the cutting surface of the sound part, and the side wall of the test box far from the ultimate bearing capacity simulation unit in the length direction and the upper end surface of the bearing plate are closely attached to the sound part. Therefore, the sound part can move smoothly along the width direction of the test box during the process of being pulled back by the sixth telescopic power source through the push-pull plate. Finally, the sound part is pulled back to the transfer plate by the push-pull plate and then taken out through the cooperation of the staff. The sound part after cutting the karst foundation can be immediately used to prepare a new karst foundation.

[0046] 5. The present invention can respectively conduct ultimate bearing capacity simulation experiments on karst foundations with different geological conditions generated by soft interlayers at different angles. During the experiment, image data of the karst foundation collapse is captured by a camera, and the load size of the first telescopic power source pressing on the karst foundation at the collapse time is recorded to obtain the ultimate bearing capacity size of each karst foundation at the time of collapse. By comparing the angles corresponding to the soft interlayers in the karst foundation that collapses when the ultimate bearing capacity is the largest, the karst foundation at this angle can be selected for construction in actual projects to ensure construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 Shown is a three-dimensional structural schematic diagram of the present invention;

[0048] Figure 2 Shown is a structural schematic diagram of the karst foundation of the present invention with a karst cave and a soft interlayer;

[0049] Figure 3 Shown is a structural schematic diagram of the present invention related to a° and b°;

[0050] Figure 4 Shown is a structural schematic diagram of the bearing plate and the baffle of the present invention;

[0051] Figure 5 Shown is a structural schematic diagram of the ultimate bearing capacity simulation unit of the present invention;

[0052] Figure 6 Shown is a structural schematic diagram of the cutting unit of the present invention;

[0053] Figure 7 Shown is an exploded view of the rotating block, the first rotating groove and the second rotating groove of the present invention;

[0054] Figure 8 It shows a schematic structural diagram related to the sliding door and transfer plate of the present invention.

[0055] In the figure: 101, test chamber; 102, karst foundation; 103, weak interlayer; 104, karst cave;

[0056] 201, pressure plate; 202, first telescopic power source; 203, first mounting plate; 205, first chute; 206, second telescopic power source;

[0057] 301, electric saw;

[0058] 401, first rotary power source; 402, third telescopic power source; 403, first mounting block; 404, second chute;

[0059] 501, turntable; 502, rotating block; 503, second mounting block; 504, first gear; 505, second gear; 506, second rotary power source; 507, first rotating groove; 508, second rotating groove;

[0060] 601, fourth telescopic power source; 602, collection box; 603, third chute;

[0061] 701, fifth telescopic power source; 702, receiving plate; 703, baffle; 704, second mounting plate; 705, fourth chute; 706, opening;

[0062] 801, push-pull plate; 802, third mounting block; 803, sixth telescopic power source; 804, seventh telescopic power source; 805, circular groove; 806, transfer plate; 807, handle; 808, slide rail;

[0063] 901, sliding door; 902, eighth telescopic power source; 1001, camera. Specific embodiments

[0064] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0065] Please refer to Figures 1 to 8It should be noted that the structures, proportions, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope for the implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented.

[0066] The following various embodiments are only for illustration. Combinations can be made between the various embodiments, and it is not limited to the content shown in the following single embodiment.

[0067] Please refer to Figures 1 to 3 , the present invention provides a karst collapse simulation experiment system based on the simulation of various geological conditions. The simulation experiment system includes:

[0068] A test box 101, a karst foundation 102, a weak interlayer 103, and a karst cave 104. The karst foundation 102 is located inside the test box 101. The karst cave 104 is located inside the karst foundation 102 and penetrates the side walls on both sides in the width direction of the karst foundation 102. The weak interlayer 103 is located inside the karst foundation 102 and intersects with the karst cave 104. The weak interlayer 103 is perpendicular to the side walls in the width direction of the karst foundation 102. The degree of the acute angle formed by the weak interlayer 103 and the lower end surface of the karst foundation 102 is a°.

[0069] A limit bearing capacity simulation unit. The limit bearing capacity simulation unit includes a pressing plate 201. The pressing plate 201 is located directly above the karst cave 104. The pressing plate 201 can move along the height direction of the karst foundation 102. The pressing plate 201 applies a load to the upper end surface of the karst foundation 102 to damage the upper end surface of the karst foundation 102.

[0070] A cutting unit. The cutting unit includes a saw 301, a first moving component, a rotating component, and a second moving component. The saw 301 is arranged at the moving end of the first moving component. The first moving component is arranged at the rotating end of the rotating component. The rotating component is rotatably installed at the moving end of the second moving component. The saw 301 cuts the karst foundation 102 along the moving direction of the first moving component. The cutting surface of the karst foundation 102 is located below the damaged part of the karst foundation 102. The degree of the acute angle formed by the cutting surface and the lower end surface of the karst foundation 102 is b°, and b° ≤ a°.

[0071] In this embodiment, a karst foundation 102 with a karst cave 104 and a soft interlayer 103 is placed in a test chamber 101 to simulate a construction site. Then, a load is applied to the upper end surface of the karst foundation 102 by a pressing plate 201. After the upper end surface of the karst foundation 102 is damaged by the pressing plate 201, a second moving assembly moves a saw 301 to a specified cutting position, and a rotating assembly rotates the saw 301 to a specified cutting angle. Then, the saw 301 cuts the lower part of the damaged part of the karst foundation 102 along the moving direction of the first moving assembly, and the degree of the acute angle formed by the cutting surface of the karst foundation 102 and the lower end surface of the karst foundation 102 is not greater than the degree of the acute angle formed by the soft interlayer 103 and the lower end surface of the karst foundation 102. The damaged part after cutting the karst foundation 102 is discarded, and the intact part after cutting the karst foundation 102 is retained.

[0072] When the present invention conducts indoor simulation on a karst foundation 102 with soft interlayers 103 having different inclination angles, the upper end surface of the karst foundation 102 is damaged by a pressing plate 201. At this time, a part of the karst foundation 102 is damaged and the other part is intact. The karst foundation 102 is cut by a saw 301, and the intact part and the damaged part of the karst foundation 102 after cutting are separated by a cutting surface, so as to facilitate the re-production of the karst foundation 102 for the intact part after cutting the karst foundation 102.

[0073] Please refer to Figure 1 、 Figure 4 and Figure 5 The ultimate bearing capacity simulation unit further includes a first telescopic power source 202, a first mounting plate 203, a first sliding groove 205 and a second telescopic power source 206;

[0074] The first telescopic power source 202 and the second telescopic power source 206 are not limited herein. Their function is to provide telescopic power, which can be a cylinder, a hydraulic cylinder, an electric telescopic rod, etc.;

[0075] The extending end of the first telescopic power source 202 is fixedly connected to the pressing plate 201, and the pressing plate 201 moves along the height direction of the karst foundation 102 under the action of the first telescopic power source 202;

[0076] The fixed end of the first telescopic power source 202 is fixedly connected to the first mounting plate 203. The first sliding groove 205 is horizontally opened on the side wall of the test chamber 101. The sliding guiding direction of the first sliding groove 205 is parallel to the length direction of the test chamber 101, and the first mounting plate 203 can slide along the sliding guiding direction of the first sliding groove 205;

[0077] The extending end of the second telescopic power source 206 is fixedly connected to the first mounting plate 203, and the fixed end of the second telescopic power source 206 is fixedly connected to the test chamber 101. Under the action of the second telescopic power source 206, the first mounting plate 203 slides along the sliding guiding direction of the first chute 205 to extend or retract the pressing plate 201 above the karst foundation 102.

[0078] In this embodiment, when the second telescopic power source 206 retracts, it drives the first mounting plate 203 to move out above the test chamber 101. The first mounting plate 203 drives the first telescopic power source 202 and the pressing plate 201 to move out above the test chamber 101 together. A karst foundation 102 with a karst cave 104 and a weak interlayer 103 is placed in the test chamber 101. Then, the second telescopic power source 206 extends until the first mounting plate 203 drives the first telescopic power source 202 and the pressing plate 201 to be located directly above the karst cave 104 in the karst foundation 102. Then, the first telescopic power source 202 extends to make the pressing plate 201 press the upper end surface of the karst foundation 102 until the pressing plate 201 destroys the karst foundation 102.

[0079] When the karst foundation 102 is placed in the test chamber 101 in the present invention, the pressing plate 201 can be moved away above the test chamber 101 under the action of the second telescopic power source 206 to facilitate the placement of the karst foundation 102 in the test chamber 101. After the karst foundation 102 is placed in the test chamber 101, the pressing plate 201 can be moved to directly above the karst cave 104 in the karst foundation 102 under the action of the second telescopic power source 206, facilitating the simulation experiment of the ultimate bearing capacity of the karst foundation 102 by the pressing plate 201.

[0080] Please refer to Figure 1 、 Figure 6 and Figure 7 As shown in, the first moving component includes a first rotary power source 401, a third telescopic power source 402, a first mounting block 403, and a second chute 404;

[0081] The first rotary power source 401 is not limited herein. Its function is to provide rotary power, which can be an AC motor, a stepping motor, etc.;

[0082] The third telescopic power source 402 is not limited herein. Its function is to provide telescopic power, which can be a cylinder, a hydraulic cylinder, a ball screw, etc.;

[0083] The rotating end of the first rotary power source 401 is fixedly connected to the electric saw 301. The rotation axis of the first rotary power source 401 is parallel to the width direction of the karst foundation 102. The first rotary power source 401 adjusts the cutting angle of the electric saw 301.

[0084] The extending end of the third telescopic power source 402 is fixedly connected to the fixed end of the first rotary power source 401. The telescopic axis of the third telescopic power source 402 is perpendicular to the rotation axis of the first rotary power source 401. The fixed end of the third telescopic power source 402 is fixedly connected to the first mounting block 403. A second sliding groove 404 is formed in the first mounting block 403. The sliding guiding direction of the second sliding groove 404 is perpendicular to the rotation axis of the first rotary power source 401. The extending end of the third telescopic power source 402 telescopically moves within the second sliding groove 404.

[0085] In this embodiment, in the test chamber 101, a karst foundation 102 with a karst cave 104 and a soft interlayer 103 is placed to simulate the construction site. Then, the pressing plate 201 applies a load to the upper end surface of the karst foundation 102. After the upper end surface of the karst foundation 102 is damaged by the pressing plate 201, according to the damage situation, the second moving assembly moves the electric saw 301 to the designated cutting position, and the rotating assembly rotates the electric saw 301 to the designated cutting angle. The electric saw 301 rotates under the action of the first rotary power source 401 until the cutting blade is parallel to the telescopic direction of the third telescopic power source 402. Then, the electric saw 301 is started and moves along the sliding guiding direction of the second sliding groove 404 under the action of the third telescopic power source 402 to cut the karst foundation 102.

[0086] When the electric saw 301 of the present invention cuts the karst foundation 102, the electric saw 301 slides along the sliding guiding direction of the second sliding groove 404 driven by the third telescopic power source 402. The second sliding groove 404 restricts the third telescopic power source 402 to only move along the sliding guiding direction of the second sliding groove 404, so as to ensure that the cutting trajectory of the electric saw 301 on the karst foundation 102 is a stable plane.

[0087] Please refer to Figure 1 、 Figure 6 and Figure 7 The rotating assembly includes a turntable 501, a rotating block 502, a second mounting block 503, a first gear 504, a second gear 505, a second rotary power source 506, a first rotating groove 507 and a second rotating groove 508;

[0088] Here, the second rotary power source 506 is not limited. Its function is to provide rotary power, which can be an AC motor, a stepping motor, etc.;

[0089] One end of the turntable 501 close to the karst foundation 102 is fixedly connected to the first mounting block 403. An end face of the second mounting block 503 close to the karst foundation 102 is provided with a first rotating groove 507. A second rotating groove 508 is provided in the first rotating groove 507. The rotation axes of the first rotating groove 507 and the second rotating groove 508 coincide. The rotation axes of the first rotating groove 507 and the second rotating groove 508 are both parallel to the rotation axis of the first rotation power source 401. The diameter of the first rotating groove 507 is smaller than the diameter of the second rotating groove 508;

[0090] One end of the turntable 501 away from the karst foundation 102 is fixedly connected with a rotating block 502. The diameter of the rotating block 502 is the same as the diameter of the second rotating groove 508. The diameter of the turntable 501 is the same as the diameter of the first rotating groove 507. The rotating block 502 is rotatably arranged in the second rotating groove 508. One end of the turntable 501 away from the karst foundation 102 is rotatably arranged in the first rotating groove 507. A first gear 504 is fixedly connected to the turntable 501. The rotation axis of the first gear 504 is consistent with the rotation axis of the turntable 501. The second rotation power source 506 is fixedly installed on the second mounting block 503. The rotation axis of the second rotation power source 506 is parallel to the rotation axis of the first rotation power source 401. A second gear 505 is fixedly connected to the rotating end of the second rotation power source 506. The second gear 505 meshes with the first gear 504.

[0091] In this embodiment, a karst foundation 102 with a karst cave 104 and a soft interlayer 103 is placed in the test box 101 to simulate the construction site. Then, the pressing plate 201 applies a load to the upper end face of the karst foundation 102. After the upper end face of the karst foundation 102 is damaged by the pressing plate 201, according to the damage situation, the second moving assembly moves the electric saw 301 to the designated cutting position. Then, the second rotation power source 506 is started. The second rotation power source 506 drives the second gear 505 to rotate. The second gear 505 drives the engaged first gear 504 to rotate. The first gear 504 drives the turntable 501 to rotate together. When the turntable 501 rotates the electric saw 301 to the designated cutting angle, the second rotation power source 506 is turned off and waiting for subsequent cutting operations.

[0092] The turntable 501 of the present invention can drive the electric saw 301 to rotate to the designated cutting angle under the action of the second rotation power source 506 to cut the karst foundation 102, so that a cutting angle that is appropriate and can retain the most intact part of the karst foundation 102 after cutting can be selected according to the specific damage situation of the karst foundation 102.

[0093] Please refer to Figure 1 、 Figure 6 and Figure 8, the second moving component includes a fourth telescopic power source 601, a collection box 602 and a third chute 603;

[0094] The fourth telescopic power source 601 is not limited here. Its function is to provide telescopic power and can be a cylinder, a hydraulic cylinder, an electric telescopic rod, etc.;

[0095] The collection box 602 is located on one side in the width direction of the test box 101, and the side wall of the collection box 602 close to the test box 101 is communicated. The collection box 602 collects the damaged parts after the karst foundation 102 is cut;

[0096] The third chute 603 is horizontally opened on the side wall of the collection box 602. The sliding guiding direction of the third chute 603 is perpendicular to the rotation axis of the turntable 501. The second mounting block 503 can slide along the sliding guiding direction of the third chute 603;

[0097] The extending end of the fourth telescopic power source 601 is fixedly connected to the second mounting block 503, and the fixed end of the fourth telescopic power source 601 is fixedly connected to the collection box 602. The second mounting block 503 slides along the sliding guiding direction of the third chute 603 under the action of the fourth telescopic power source 601.

[0098] In this embodiment, when the second telescopic power source 206 retracts, the pressing plate 201 is driven out above the test box 101. When the fourth telescopic power source 601 extends, the electric saw 301 is driven out above the test box 101. A karst foundation 102 with a karst cave 104 and a soft interlayer 103 is placed in the test box 101. Then, when the second telescopic power source 206 extends, the pressing plate 201 is driven to move above the karst cave 104 in the karst foundation 102. Then, when the first telescopic power source 202 extends, the pressing plate 201 presses the upper end surface of the karst foundation 102 until the karst foundation 102 is damaged. According to the damage condition of the karst foundation 102, the second mounting block 503 drives the electric saw 301 to move to the specified cutting position under the expansion and contraction of the fourth telescopic power source 601. The turntable 501 drives the electric saw 301 to move to the specified cutting angle under the rotation of the second rotation power source 506. The electric saw 301 rotates under the action of the first rotation power source 401 until the cutting blade is parallel to the expansion and contraction direction of the third telescopic power source 402. Then, the electric saw 301 is started and moves along the sliding guiding direction of the second chute 404 under the action of the third telescopic power source 402 to cut the karst foundation 102.

[0099] When the karst foundation 102 is placed in the test chamber 101 in the present invention, not only can the pressing plate 201 be moved away from directly above the test chamber 101 under the action of the second telescopic power source 206, but also the electric saw 301 can be moved away from directly above the test chamber 101 under the action of the fourth telescopic power source 601, so as to facilitate the placement of the karst foundation 102 in the test chamber 101. After the karst foundation 102 is placed in the test chamber 101, the electric saw 301 can cut the karst foundation 102 along the sliding guiding direction of the second chute 404 under the action of the third telescopic power source 402, and the structural design is ingenious.

[0100] Please refer to Figure 1 、 Figure 4 and Figure 8 The simulation experiment system further includes a fifth telescopic power source 701, a receiving plate 702, a baffle 703, a second mounting plate 704, a fourth chute 705 and an opening 706;

[0101] The fifth telescopic power source 701 is not limited herein. Its function is to provide telescopic power and can be a cylinder, a hydraulic cylinder, an electric telescopic rod, etc.;

[0102] The receiving plate 702 is located in the test chamber 101, the karst foundation 102 is placed on the receiving plate 702, the extending end of the fifth telescopic power source 701 is fixedly connected to the receiving plate 702, the telescopic axis of the fifth telescopic power source 701 is parallel to the height direction of the karst foundation 102, the fixed end of the fifth telescopic power source 701 is fixedly connected to the ground, and the receiving plate 702 moves up and down along the height direction of the karst foundation 102 under the action of the fifth telescopic power source 701;

[0103] An opening 706 is formed in the side wall of the test chamber 101 on the side away from the cutting unit. The height of the opening 706 is the same as the height of the karst foundation 102. The upper and lower end faces of the opening 706 are horizontally provided with fourth chutes 705. The sliding guiding direction of the fourth chutes 705 is parallel to the length direction of the test chamber 101. The second mounting plate 704 is installed in the fourth chutes 705, and the second mounting plate 704 can slide in the opening 706 through the fourth chutes 705 to open or close the end face of the test chamber 101 on the side away from the cutting unit;

[0104] The baffle 703 is fixedly connected to the receiving plate 702. The baffle 703 is located on the side wall of the receiving plate 702 close to the cutting unit. The upper end face of the baffle 703 is higher than the upper end face of the receiving plate 702, and the baffle 703 is located at one end of the receiving plate 702 in the length direction away from the ultimate bearing capacity simulation unit;

[0105] A simulated experimental space for the karst foundation 102 is formed among the side walls on both sides in the length direction of the test chamber 101, the side wall of the baffle 703 close to the second mounting plate 704, the upper end surface of the receiving plate 702, and the side wall of the second mounting plate 704 close to the baffle 703.

[0106] In this embodiment, the karst foundation 102 is placed on the receiving plate 702 by a crane. When placing it, the lower end of the weak interlayer 103 is close to the ultimate bearing capacity simulation unit. At this time, the side walls on both sides in the length direction of the test chamber 101, the side wall of the baffle 703 close to the second mounting plate 704, the upper end surface of the receiving plate 702, and the side wall of the second mounting plate 704 close to the baffle 703 are tightly attached to the end surfaces corresponding to the side walls around the karst foundation 102, so that a simulated experimental space for the karst foundation 102 is formed among the side walls on both sides in the length direction of the test chamber 101, the side wall of the baffle 703 close to the second mounting plate 704, the upper end surface of the receiving plate 702, and the side wall of the second mounting plate 704 close to the baffle 703, waiting for subsequent experiments.

[0107] In the present invention, the side walls on both sides in the length direction of the test chamber 101, the baffle 703, and the second mounting plate 704 are tightly attached to the side walls around the karst foundation 102 placed on the receiving plate 702 to ensure that the karst foundation 102 will not shake during the subsequent simulated experiment on the ultimate bearing capacity of the karst foundation 102 and when cutting the karst foundation 102. And when it is necessary to cut the lower part of the karst foundation 102 during cutting the karst foundation 102, the fifth telescopic power source 701 extends out to push the karst foundation 102 upward to cooperate with the cutting track of the electric saw 301 to cut the karst foundation 102.

[0108] Please refer to Figure 1 、 Figure 2 and Figure 8 As shown in, the simulation experiment system further includes a classification and collection unit, and the classification and collection unit includes a push-pull plate 801, a third mounting block 802, a sixth telescopic power source 803, and a seventh telescopic power source 804;

[0109] No limitation is imposed on the sixth telescopic power source 803 and the seventh telescopic power source 804 here. Their function is to provide telescopic power, which can be a cylinder, a hydraulic cylinder, an electric telescopic rod, etc.;

[0110] The push-pull plate 801 is cylindrical, and the central axis of the push-pull plate 801 is parallel to the width direction of the test chamber 101. The diameter of the push-pull plate 801 is the same as the diameter of the karst cave 104. A circular groove 805 is formed in the side wall of the second mounting plate 704 close to the sixth telescopic power source 803. The diameter of the circular groove 805 is the same as the diameter of the karst cave 104, and the central axis of the circular groove 805 is parallel to the central axis of the push-pull plate 801 and is located on the same horizontal plane. The push-pull plate 801 can move along the width direction of the karst foundation 102 and extend into the circular groove 805.

[0111] The extending end of the sixth telescopic power source 803 is fixedly connected to one end of the push-pull plate 801. The diameter of the extending end of the sixth telescopic power source 803 is smaller than the diameter of the push-pull plate 801. The telescopic axis of the sixth telescopic power source 803 is parallel to the width direction of the test chamber 101. The push-pull plate 801 can extend into or out of the circular groove 805 under the action of the sixth telescopic power source 803.

[0112] The fixed end of the seventh telescopic power source 804 is horizontally installed on the third mounting block 802. The third mounting block 802 is fixedly connected to the ground. The extending end of the seventh telescopic power source 804 is fixedly connected to the fixed end of the sixth telescopic power source 803. The telescopic axis of the seventh telescopic power source 804 is parallel to the sliding guiding direction of the fourth sliding groove 705. The sixth telescopic power source 803 moves along the sliding guiding direction of the fourth sliding groove 705 under the influence of the seventh telescopic power source 804, so that when the push-pull plate 801 extends into the circular groove 805, the second mounting plate 704 is driven by the push-pull plate 801 to move along the sliding guiding direction of the fourth sliding groove 705 to open or close the end face of the test chamber 101 on the side away from the cutting unit.

[0113] The push-pull plate 801 can push away the damaged part after cutting the karst foundation 102 under the action of the sixth telescopic power source 803, and the push-pull plate 801 can recover the intact part after cutting the karst foundation 102 under the reverse action of the sixth telescopic power source 803.

[0114] In this embodiment, the sixth telescopic power source 803 extends so that the push-pull plate 801 enters the circular groove 805. Then, the seventh telescopic power source 804 retracts to drive the sixth telescopic power source 803 to move. The sixth telescopic power source 803 slides the second mounting plate 704 along the fourth chute 705 through the push-pull plate 801 to close the end face of the test chamber 101 on the side away from the cutting unit. Then, the karst foundation 102 is placed on the receiving plate 702 in the test chamber 101. When placing it, the lower end of the soft interlayer 103 is close to the ultimate bearing capacity simulation unit. After the ultimate bearing capacity simulation experiment and cutting of the karst foundation 102, the fifth telescopic power source 701 lowers the receiving plate 702 to a height at which the push-pull plate 801 can push off the damaged part after cutting the karst foundation 102. The seventh telescopic power source 804 extends to drive the sixth telescopic power source 803 to move. The sixth telescopic power source 803 slides the second mounting plate 704 along the fourth chute 705 through the push-pull plate 801 to open the end face of the test chamber 101 on the side away from the cutting unit. Then, the sixth telescopic power source 803 retracts so that the push-pull plate 801 moves out of the circular groove 805. Then, the seventh telescopic power source 804 retracts to move the sixth telescopic power source 803 to a position where the push-pull plate 801 can push the damaged part after cutting the karst foundation 102. The sixth telescopic power source 803 extends so that the push-pull plate 801 contacts the damaged part after cutting the karst foundation 102 after passing through the opening 706. The sixth telescopic power source 803 continues to extend so that the push-pull plate 801 pushes the damaged part after cutting the karst foundation 102 into the collection box 602 after passing through the upper end face of the receiving plate 702. Then, the fifth telescopic power source 701 extends the receiving plate 702 until the upper end face of the receiving plate 702 is flush with the lower end face of the opening 706. After that, the seventh telescopic power source 804 moves the extending end of the sixth telescopic power source 803 until the side wall of the extending end of the sixth telescopic power source 803 is attached to the cutting surface of the karst foundation 102. Then, the sixth telescopic power source 803 retracts to attach the end face part close to each other between the push-pull plate 801 and the intact part after cutting the karst foundation 102 located in the collection box 602. Then, the sixth telescopic power source 803 continues to retract to pull back the intact part after cutting the karst foundation 102 through the push-pull plate 801.

[0115] After the karst foundation 102 of the present invention is cut, it is divided into a sound part and a damaged part. The damaged part is located above the sound part. When the push-pull plate 801 extends under the action of the sixth telescopic power source 803, the damaged part is pushed into the collection box 602 for collection. When pushing out, since the side walls on both sides in the length direction of the test box 101 and the upper end faces of the bearing plates 702 are closely attached to the karst foundation 102, and the baffle plate 703 is closely attached to the sound part, the sound part will not move in the test box 101 when the damaged part is pushed into the collection box 602. Then, the push-pull plate 801 can pull back the sound part under the retraction of the sixth telescopic power source 803. When pulling back, the side wall of the extending end of the sixth telescopic power source 803 is closely attached to the cutting surface of the sound part. The side wall of the test box 101 in the length direction away from the ultimate bearing capacity simulation unit and the upper end faces of the bearing plates 702 are closely attached to the sound part. Therefore, the sound part can move smoothly along the width direction of the test box 101 during the process of being pulled back by the sixth telescopic power source 803 through the push-pull plate 801.

[0116] Please refer to Figure 8 , the classification and collection unit further includes a transfer plate 806, a handle 807 and a slide rail 808;

[0117] Slide rails 808 are provided on the end faces of the test box 101 and the third mounting block 802 opposite to each other. The sliding guiding direction of the slide rail 808 is parallel to the sliding guiding direction of the fourth chute 705. A transfer plate 806 is slidably installed between the two slide rails 808. The upper end face of the transfer plate 806 is flush with the lower end face of the opening 706. The transfer plate 806 receives the sound part after the karst foundation 102 is cut. One end of the transfer plate 806 is fixedly connected with a handle 807. The transfer plate 806 moves along the sliding guiding direction of the slide rail 808 under the drive of the handle 807.

[0118] In this embodiment, when the sixth telescopic power source 803 pulls back the sound part after the karst foundation 102 is cut, the sixth telescopic power source 803 retracts to fit the end face part close to the sound part after the karst foundation 102 is cut between the push-pull plate 801 located in the collection box 602. Then the sixth telescopic power source 803 continues to retract, and the sound part after the karst foundation 102 is cut is completely pulled back onto the transfer plate 806 through the push-pull plate 801. Then the seventh telescopic power source 804 extends the sixth telescopic power source 803 to a position away from the sound part after the karst foundation 102 is cut. At the same time, the sixth telescopic power source 803 retracts the push-pull plate 801 out of the upper end face of the transfer plate 806. Then the staff pulls the transfer plate 806 along the slide rail 808 for a certain distance and takes out the sound part after the karst foundation 102 is cut.

[0119] After the intact part of the karst foundation 102 cut by the present invention is pulled out, it can be immediately taken out through the cooperation of the staff, which is convenient for conducting the test on the next karst foundation 102, and the intact part of the karst foundation 102 after cutting can be immediately used for the preparation of a new karst foundation 102.

[0120] Please refer to Figure 8 , the simulation experiment system further includes a sliding door 901 and an eighth telescopic power source 902;

[0121] The sliding door 901 is arranged on the side wall of one side in the length direction of the collection box 602, the extending end of the eighth telescopic power source 902 is fixedly connected to the sliding door 901, the telescopic direction of the eighth telescopic power source 902 is parallel to the width direction of the collection box 602, and the sliding door 901 moves under the action of the eighth telescopic power source 902 to open or close the collection box 602.

[0122] In this embodiment, when there are enough damaged parts of the karst foundation 102 after cutting pushed into the collection box 602, the eighth telescopic power source 902 retracts to move the sliding door 901 to open the collection box 602, and then the staff centrally processes the damaged parts of the karst foundation 102 in the collection box 602.

[0123] In multiple experiments of the present invention, the damaged parts of the karst foundation 102 after cutting can be centrally and uniformly processed when they are filled enough in the collection box 602, avoiding processing the damaged parts of the karst foundation 102 once for each experiment, which is a waste of experimental time.

[0124] Please refer to Figure 1 and Figure 6 , the simulation experiment system further includes a camera 1001;

[0125] The camera 1001 is installed on the end face of the turntable 501 close to the karst foundation 102, and the camera 1001 collects image data of the damage condition of the karst foundation 102;

[0126] The number of the cameras 1001 is not limited here and can be one or more. The number of the cameras 1001 in this embodiment is two.

[0127] In this embodiment, when the karst foundation 102 is conducting the ultimate bearing capacity simulation experiment, the camera 1001 remains on. When a collapse occurs in the karst cave 104 of the karst foundation 102, the camera 1001 captures the image data at this time and records the collapse time and the load magnitude of the first telescopic power source 202 pressing on the karst foundation 102, so as to obtain the ultimate bearing capacity of the karst foundation 102 when it collapses.

[0128] The present invention can perform limit bearing capacity simulation experiments on karst foundations 102 with different geological conditions generated by soft interlayers 103 at different angles respectively. During the experiment, image data of the collapse of the karst foundation 102 is captured by a camera 1001, and the load magnitude of the first telescopic power source 202 pressing on the karst foundation 102 at the time of collapse is recorded. The magnitude of the limit bearing capacity of each karst foundation 102 at the time of collapse can be obtained, and the angle corresponding to the soft interlayer 103 in the karst foundation 102 that collapses when the limit bearing capacity is the largest can be compared. Thus, in actual engineering, the karst foundation 102 at this angle can be selected for construction to ensure the safety of construction.

[0129] The above embodiments merely illustrate the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. Based on the karst collapse simulation experimental system under various geological conditions, it is characterized by: The simulation experiment system comprises: A test box, a karst foundation, a weak interlayer and a karst cave, wherein the karst foundation is located in the test box, the karst cave is located in the karst foundation and penetrates the side walls on both sides of the karst foundation in the width direction, the weak interlayer is located in the karst foundation and intersects with the karst cave, the weak interlayer is perpendicular to the side walls in the width direction of the karst foundation, and the degree of the acute angle formed by the weak interlayer and the lower end surface of the karst foundation is a°; An ultimate bearing capacity simulation unit, wherein the ultimate bearing capacity simulation unit comprises a pressing plate, wherein the pressing plate is located directly above the cave, wherein the pressing plate can move along the height direction of the karst foundation, and wherein the pressing plate applies a load to the upper end surface of the karst foundation to destroy the upper end surface of the karst foundation; A cutting unit, the cutting unit includes an electric saw, a first moving component, a rotating component and a second moving component, the electric saw is arranged at the moving end of the first moving component, the first moving component is arranged at the rotating end of the rotating component, the rotating component is rotatably mounted on the moving end of the second moving component, the electric saw cuts the karst foundation along the moving direction of the first moving component, the cutting surface of the karst foundation is located below the damaged part of the karst foundation, the degree of the acute angle formed by the cutting surface and the lower end surface of the karst foundation is b°, b°≤a°.

2. The karst collapse simulation experimental system based on multiple geological conditions simulation according to claim 1 is characterized by: The ultimate bearing capacity simulation unit also includes a first telescopic power source, a first mounting plate, a first slide slot, and a second telescopic power source; The extended end of the first telescopic power source is fixedly connected to the pressing plate, and the pressing plate moves along the height direction of the karst foundation under the action of the first telescopic power source; The fixed end of the first telescopic power source is fixedly connected to the first mounting plate, the first slide groove is horizontally opened on the side wall of the test box, the sliding guide direction of the first slide groove is parallel to the length direction of the test box, and the first mounting plate can slide along the sliding guide direction of the first slide groove; The extended end of the second telescopic power source is fixedly connected to the first mounting plate, and the fixed end of the second telescopic power source is fixedly connected to the test box. The first mounting plate slides along the sliding guide direction of the first slide groove under the action of the second telescopic power source to extend the pressure plate into or move it out directly above the karst foundation.

3. The karst collapse simulation experimental system based on multiple geological conditions simulation according to claim 1 is characterized by: The first moving assembly includes a first rotating power source, a third telescopic power source, a first mounting block and a second slide slot; The rotating end of the first rotating power source is fixedly connected to the electric saw, the rotating axis of the first rotating power source is parallel to the width direction of the karst foundation, and the first rotating power source adjusts the cutting angle of the electric saw; The extended end of the third telescopic power source is fixedly connected to the fixed end of the first rotating power source, the telescopic axis of the third telescopic power source is perpendicular to the rotation axis of the first rotating power source, the fixed end of the third telescopic power source is fixedly connected to the first mounting block, the first mounting block is provided with a second slide groove, the sliding guide direction of the second slide groove is perpendicular to the rotation axis of the first rotating power source, and the extended end of the third telescopic power source is telescoped in the second slide groove.

4. The karst collapse simulation experimental system based on multiple geological conditions simulation according to claim 3 is characterized by: The rotating assembly includes a rotating disk, a second mounting block, a first gear, a second gear, and a second rotating power source; One end of the turntable close to the karst foundation is fixedly connected to the first mounting block, and one end of the turntable away from the karst foundation is rotatably arranged in the second mounting block, the rotation axis of the turntable is parallel to the rotation axis of the first rotating power source, a first gear is fixedly connected to the turntable, the rotation axis of the first gear is consistent with the rotation axis of the turntable, the second rotating power source is fixedly installed on the second mounting block, the rotation axis of the second rotating power source is parallel to the rotation axis of the first rotating power source, the rotating end of the second rotating power source is fixedly connected to a second gear, and the second gear is meshed with the first gear.

5. The karst collapse simulation experimental system based on multiple geological conditions simulation according to claim 4 is characterized in that: The second moving assembly includes a fourth telescopic power source, a collection box and a third chute; The collecting box is located on one side of the test box in the width direction, and the collecting box is connected to the side wall of the test box, and the collecting box collects the damaged part after the karst foundation is cut; The third slide groove is horizontally opened on the side wall of the collection box, the sliding guide direction of the third slide groove is perpendicular to the rotation axis of the turntable, and the second mounting block can slide along the sliding guide direction of the third slide groove; The extended end of the fourth telescopic power source is fixedly connected to the second mounting block, the fixed end of the fourth telescopic power source is fixedly connected to the collection box, and the second mounting block slides along the sliding guide direction of the third slide groove under the action of the fourth telescopic power source.

6. The karst collapse simulation experimental system based on multiple geological conditions simulation according to claim 1 is characterized by: The simulation experiment system also includes a fifth telescopic power source, a receiving plate, a baffle, a second mounting plate, a fourth slide groove and an opening; The receiving plate is located in the test box, the karst foundation is placed on the receiving plate, the extended end of the fifth telescopic power source is fixedly connected to the receiving plate, the telescopic axis of the fifth telescopic power source is parallel to the height direction of the karst foundation, the fixed end of the fifth telescopic power source is fixedly connected to the ground, and the receiving plate moves up and down along the height direction of the karst foundation under the action of the fifth telescopic power source; An opening is provided on the side wall of the test box away from the cutting unit, the height of the opening is consistent with the height of the karst foundation, and the upper and lower end surfaces of the opening are horizontally provided with fourth slide grooves, the sliding guide direction of the fourth slide groove is parallel to the length direction of the test box, and the second mounting plate is installed in the fourth slide groove, and the second mounting plate can slide in the opening through the fourth slide groove to open or close the end surface of the test box away from the cutting unit; The baffle is fixed to the receiving plate, the baffle is located on the side wall of the receiving plate close to the cutting unit, the upper end surface of the baffle is higher than the upper end surface of the receiving plate, and the baffle is located at one end of the receiving plate in the length direction away from the ultimate bearing capacity simulation unit; The side walls on both sides of the test box in the length direction, the side wall of the baffle close to the second mounting plate, the upper end surface of the receiving plate and the side wall of the second mounting plate close to the baffle form a simulated experimental space for the karst foundation.

7. The karst collapse simulation experimental system based on multiple geological conditions simulation according to claim 6 is characterized by: The simulation experiment system also includes a classification collection unit, which includes a push-pull plate, a third mounting block, a sixth telescopic power source and a seventh telescopic power source; The push-pull plate is cylindrical, and the central axis of the push-pull plate is parallel to the width direction of the test box, the diameter of the push-pull plate is the same as the diameter of the cave, the side wall of the second mounting plate close to the sixth telescopic power source is provided with a circular groove, the diameter of the circular groove is the same as the diameter of the cave, and the central axis of the circular groove is parallel to the central axis of the push-pull plate and is located in the same horizontal plane, and the push-pull plate can move along the width direction of the karst foundation and extend into the circular groove; The extended end of the sixth telescopic power source is fixedly connected to one end of the push-pull plate, the diameter of the extended end of the sixth telescopic power source is smaller than the diameter of the push-pull plate, the telescopic axis of the sixth telescopic power source is parallel to the width direction of the test box, and the push-pull plate can be extended into or moved out of the circular groove under the action of the sixth telescopic power source; The fixed end of the seventh telescopic power source is horizontally mounted on the third mounting block, the third mounting block is fixedly connected to the ground, the extended end of the seventh telescopic power source is fixedly connected to the fixed end of the sixth telescopic power source, the telescopic axis of the seventh telescopic power source is parallel to the sliding guide direction of the fourth slide groove, and the sixth telescopic power source moves along the sliding guide direction of the fourth slide groove at the left and right bottom of the seventh telescopic power source, so that when the push-pull plate extends into the circular groove, the second mounting plate is driven by the push-pull plate to move along the sliding guide direction of the fourth slide groove to open or close the end surface of the test box away from the cutting unit; The push-pull plate can push away the damaged part of the karst foundation after cutting under the action of the sixth telescopic power source, and the push-pull plate can recover the intact part of the karst foundation after cutting under the reverse action of the sixth telescopic power source.

8. The karst collapse simulation experimental system based on multiple geological conditions simulation according to claim 7 is characterized by: The classification and collection unit also includes a transfer plate, a handle and a slide rail; The opposite end faces of the test box and the third mounting block are both provided with sliding rails, the sliding guide direction of the sliding rails is parallel to the sliding guide direction of the fourth slide groove, a transfer plate is slidably installed between the two slide rails, the upper end face of the transfer plate is flush with the lower end face of the opening, the transfer plate receives the intact part of the karst foundation after cutting, a handle is fixed to one end of the transfer plate, and the transfer plate moves along the sliding guide direction of the slide rail driven by the handle.

9. The karst collapse simulation experimental system based on multiple geological conditions simulation according to claim 5 is characterized by: The simulation experiment system also includes a sliding door and an eighth telescopic power source; The sliding door is arranged on the side wall on one side of the collection box in the length direction, the protruding end of the eighth telescopic power source is fixedly connected to the sliding door, the telescopic direction of the eighth telescopic power source is parallel to the width direction of the collection box, and the sliding door moves under the action of the eighth telescopic power source to open or close the collection box.

10. The karst collapse simulation experimental system based on multiple geological conditions simulation according to claim 4, characterized in that: The simulation experiment system also includes a camera; The camera is installed on the end surface of the turntable close to the karst foundation, and the camera collects image data of the damage situation of the karst foundation.

Images