Karst collapse simulation experiment system based on simulation of various geological conditions

Abstract

The invention provides a karst collapse simulation experiment system based on simulation of various geological conditions, which belongs to the technical field of karst collapse simulation experiments and comprises a test box, a karst foundation, a weak intercalated layer, a karst cave, an ultimate bearing capacity simulation unit, a classified collection unit, an electric saw, a first moving assembly, a rotating assembly and a second moving assembly. A karst foundation with a karst cave and a weak intercalated layer is placed in a simulation construction site in the test box, the ultimate bearing capacity simulation unit destroys the upper end face of the karst foundation so as to carry out an ultimate bearing capacity simulation experiment on the karst foundation located in the test box, and then the second moving assembly drives the electric saw to move so as to adjust the cutting position of the electric saw. The rotating assembly drives the electric saw to rotate so as to adjust the cutting angle of the electric saw, the first moving assembly drives the electric saw to move so that the karst foundation can be cut through the electric saw, and after the classified collection unit pushes away the damaged part obtained after cutting of the karst foundation, the complete part obtained after cutting of the karst foundation is recycled so that a new karst foundation can be prepared.

Description

Technical Field

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

[0002] There are a large number of karst strata in southwest my country, among which there are numerous caves. There is often a covering layer of a certain thickness on the upper part of the cave roof. Under the load of the upper covering layer, the cave is prone to collapse, which brings challenges to the safe construction and operation of projects in karst areas. The collapse of the cave is the joint instability and destruction of the cave rock mass and the covering soil mass, and its mechanical mechanism is relatively complex. The cave collapse problem is a difficult problem in foundation treatment in karst areas.

[0003] In practice, weak interlayers are formed in karst due to the presence of clayey rock layers, thin layers of mudstone, or due to weathering, dissolution, or interlayer shearing and fault movement. Usually, there is a certain inclination angle between the weak interlayer and the karst. The inclination angles of weak interlayers in karsts of different terrains are different, thus forming karsts of various geological types. In the actual study of karst collapse with weak interlayers of different inclination angles, since the on-site terrain is difficult to survey, the study of karst collapse with weak interlayers of different inclination angles is usually carried out in indoor simulation experiments.

[0004] Indoor simulation experiments for karst collapse research with soft interlayers of different inclination angles usually involve first making a karst foundation with soft interlayers in a mold, then removing the mold, taking out the karst foundation with soft interlayers, and conducting 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 bearing capacity of roadbed in karst areas". In the working state, the mast of the invention is pushed by a hydraulic cylinder and can be adjusted in position through a variable amplitude mechanism. The test device operates the wire rope through its winch system. The wire rope is set to pass through the pulley on the anchor frame and pull the impact hammer in the vertical direction. When working, the impact hammer is manipulated by the power mechanism to perform impact load testing. However, when it is necessary to perform indoor simulations on karst foundations with weak interlayers of different inclination angles, part of the karst foundation damaged by impact is destroyed, and the other part is intact. At this time, it is necessary to separate the intact part from the damaged part so as to make the karst foundation for the intact part again, while the invention can only perform impact tests on karst.

[0006] Therefore, its shortcoming is that when it is necessary to conduct indoor simulation of karst foundations with weak interlayers of different inclination angles, the invention cannot separate the intact part and the damaged part of the karst foundation after destruction. Summary of the invention

[0007] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a karst collapse simulation experimental system based on simulations of various geological conditions, so as to solve the problem in the prior art that the intact part and the damaged part of the karst foundation after destruction cannot be separated.

[0008] To achieve the above-mentioned purpose and other related purposes, the present invention provides a karst collapse simulation experimental system based on a variety of geological conditions simulation, the simulation experimental system comprising: 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°.

[0009] As an optional solution, the ultimate bearing capacity simulation unit further 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.

[0010] As an optional solution, the first moving assembly includes a first rotating power source, a third telescopic power source, a first mounting block and a second slide groove; 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.

[0011] As an optional solution, the rotating assembly includes a turntable, 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.

[0012] As an optional solution, 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.

[0013] As an optional solution, the simulation experiment system further 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.

[0014] As an optional solution, the simulation experiment system further includes a classification collection unit, and the classification collection unit 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 transfer 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.

[0015] As an optional solution, the classification and collection unit further 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.

[0016] As an optional solution, the simulation experiment system further 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.

[0017] As an optional solution, the simulation experiment system further 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.

[0018] As described above, the karst collapse simulation experimental system based on multiple geological conditions simulation of the present invention has at least the following beneficial effects: 1. When the present invention conducts a collapse simulation experiment on a karst foundation with a weak interlayer, the pressure 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 destroyed, and the lower part is intact. According to the damage of the karst foundation, the second mounting block drives the electric saw to move to a designated cutting position under the extension and retraction of the fourth telescopic power source. The fifth telescopic power source moves the karst foundation up and down to a designated position through a receiving plate. The turntable drives the electric saw to move to a designated cutting angle under the rotation of the second rotating power source. The electric saw rotates under the action of the first rotating power source until the cutting blade is parallel to the extension and retraction direction of the third telescopic power source. Then the electric saw is started and moves along the sliding guide direction of the second slide groove 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 prepare a new karst foundation for the intact part after the karst foundation is cut.

[0019] 2. When the electric saw of the present invention is cutting a karst foundation, the electric saw slides along the sliding guide direction of the second slide groove driven by the third telescopic power source, and the second slide groove restricts the third telescopic power source to move only along the sliding guide direction of the second slide groove, thereby ensuring that the cutting trajectory of the electric saw on the karst foundation is a smooth plane.

[0020] 3. The present invention uses the side walls, baffles and second mounting plates on both sides of the test box in the length direction to tightly fit the side walls around the karst foundation placed on the receiving plate to ensure that the karst foundation will not shake during the subsequent ultimate bearing capacity simulation test and cutting of the karst foundation. If the karst foundation needs to be cut at a lower position, the fifth telescopic power source extends out through the receiving plate to push the karst foundation upward to cooperate with the cutting trajectory of the electric saw so that the electric saw can be used to cut the lower part of the karst foundation.

[0021] 4. After the karst foundation of the present invention is cut, it is divided into an intact part and a damaged part. The damaged part is located above the intact 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 pushed out, the side walls on both sides of the test box in the length direction and the upper end of the receiving plate are tightly fitted to the karst foundation, and the baffle is tightly fitted to the intact part of the karst foundation. Therefore, when the damaged part is pushed into the collection box, the intact part will not move in the test box. Then, the push-pull plate can retract the sixth telescopic power source to collect the intact part. The sixth telescopic power source is pulled back, and when pulled back, the side wall of the extended end of the sixth telescopic power source fits tightly on the cut surface of the intact part, and the side wall of the test box in the length direction away from the ultimate bearing capacity simulation unit and the upper end surface of the receiving plate fit tightly on the intact part. Therefore, the intact part can move smoothly along the width direction of the test box during the process of the sixth telescopic power source being pulled back by the push-pull plate. Finally, the intact part is pulled back to the transfer plate by the push-pull plate and taken out with the cooperation of the staff. After the intact part of the karst foundation is cut, a new karst foundation can be prepared immediately.

[0022] 5. The present invention can perform ultimate bearing capacity simulation experiments on karst foundations with different geological conditions and weak interlayers at different angles, and during the experiment, use a camera to capture image data of the karst foundation collapse, record the load of the first telescopic power source pressing on the karst foundation at the time of collapse, so as to obtain the ultimate bearing capacity of each karst foundation when it collapses, and compare the angles of the weak interlayers in the collapsed karst foundation when the ultimate bearing capacity is the largest, so as to select the karst foundation with this angle for construction in actual engineering to ensure the safety of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Shown is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram showing the structure of the karst foundation with caves and weak interlayers of the present invention; Figure 3 Shown is a schematic diagram of the structure related to a° and b° of the present invention; Figure 4 Shown is a schematic diagram of the structure of the receiving plate and the baffle plate of the present invention; Figure 5 Shown is a schematic structural diagram of the ultimate bearing capacity simulation unit of the present invention; Figure 6 Shown is a schematic structural diagram of the cutting unit of the present invention; Figure 7 An exploded view showing the rotating block, the first rotating groove and the second rotating groove of the present invention; Figure 8 Shown is a schematic structural diagram of the sliding door and transfer plate of the present invention.

[0024] In the figure: 101, test box; 102, karst foundation; 103, weak interlayer; 104, cave; 201, pressing plate; 202, first telescopic power source; 203, first mounting plate; 205, first slide slot; 206, second telescopic power source; 301. Electric saw; 401, first rotating power source; 402, third telescopic power source; 403, first mounting block; 404, second slide groove; 501, turntable; 502, rotating block; 503, second mounting block; 504, first gear; 505, second gear; 506, second rotating power source; 507, first rotating groove; 508, second rotating groove; 601, fourth telescopic power source; 602, collection box; 603, third chute; 701, fifth telescopic power source; 702, receiving plate; 703, baffle; 704, second mounting plate; 705, fourth slide groove; 706, opening; 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; 901, sliding door; 902, eighth telescopic power source; 1001. Camera. DETAILED DESCRIPTION

[0025] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0026] See also Figures 1 to 8 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0027] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0028] See also Figures 1 to 3 The present invention provides a karst collapse simulation experimental system based on a variety of geological conditions simulation, the simulation experimental system comprises: A test box 101, a karst foundation 102, a weak interlayer 103 and a karst cave 104, wherein the karst foundation 102 is located in the test box 101, the karst cave 104 is located in the karst foundation 102 and penetrates the side walls on both sides of the karst foundation 102 in the width direction, the weak interlayer 103 is located in the karst foundation 102 and intersects the karst cave 104, the weak interlayer 103 is perpendicular to the side walls in the width direction of the karst foundation 102, and the degree of the acute angle formed by the weak interlayer 103 and the lower end surface of the karst foundation 102 is a°; An ultimate bearing capacity simulation unit, wherein the ultimate bearing capacity simulation unit comprises a pressing plate 201, wherein the pressing plate 201 is located directly above the karst cave 104, wherein the pressing plate 201 can move along the height direction of the karst foundation 102, and wherein the pressing plate 201 applies a load to the upper end surface of the karst foundation 102 to destroy the upper end surface of the karst foundation 102; A cutting unit, the cutting unit includes an electric saw 301, a first moving component, a rotating component and a second moving component, the electric 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 electric 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, and the degree of the acute angle formed by the cutting surface and the lower end surface of the karst foundation 102 is b°, b°≤a°.

[0029] In this embodiment, a karst foundation 102 with a karst cave 104 and a weak interlayer 103 is placed in a test box 101 to simulate a construction site, and then a pressure plate 201 applies a load to the upper end surface of the karst foundation 102. After the pressure plate 201 destroys the upper end surface of the karst foundation 102, the second moving component moves the electric saw 301 to a specified cutting position, and the rotating component rotates the electric saw 301 to a specified cutting angle. Then, the electric saw 301 cuts the lower part of the damaged part of the karst foundation 102 along the moving direction of the first moving component, 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 weak interlayer 103 and the lower end surface of the karst foundation 102. The damaged part of the karst foundation 102 after cutting is discarded, and the intact part of the karst foundation 102 after cutting is retained.

[0030] When the present invention performs indoor simulation on the karst foundation 102 with weak interlayers 103 of different inclination angles, the upper end surface of the karst foundation 102 is destroyed by the pressure plate 201. At this time, a part of the karst foundation 102 is destroyed and the other part is intact. The karst foundation 102 is cut by the electric saw 301. After cutting, the intact part and the damaged part of the karst foundation 102 are separated by the cutting surface, so that the karst foundation 102 can be made again for the intact part after the karst foundation 102 is cut.

[0031] See also Figure 1 , Figure 4 and Figure 5 , the ultimate bearing capacity simulation unit also includes a first telescopic power source 202, a first mounting plate 203, a first slide slot 205 and a second telescopic power source 206; The first telescopic power source 202 and the second telescopic power source 206 are not limited here, and their function is to provide telescopic power, and they can be a cylinder, a hydraulic cylinder, an electric telescopic rod, etc.; The extended 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; The fixed end of the first telescopic power source 202 is fixedly connected to the first mounting plate 203, the first slide groove 205 is horizontally opened on the side wall of the test box 101, the sliding guide direction of the first slide groove 205 is parallel to the length direction of the test box 101, and the first mounting plate 203 can slide along the sliding guide direction of the first slide groove 205; The extended 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 box 101. The first mounting plate 203 slides along the sliding guide direction of the first slide groove 205 under the action of the second telescopic power source 206 to extend the pressure plate 201 into or out of the top of the karst foundation 102.

[0032] In this embodiment, the second telescopic power source 206 retracts to drive the first mounting plate 203 to move out from directly above the test box 101, and the first mounting plate 203 drives the first telescopic power source 202 and the pressing plate 201 to move out from directly above the test box 101, and the karst foundation 102 with the cave 104 and the weak interlayer 103 is placed in the test box 101. Then, the second telescopic power source 206 extends to the first mounting plate 203 to drive the first telescopic power source 202 and the pressing plate 201 to be located directly above the cave 104 in the karst foundation 102, and then the first telescopic power source 202 extends so that the pressing plate 201 presses the upper end surface of the karst foundation 102 until the pressing plate 201 destroys the karst foundation 102.

[0033] When the karst foundation 102 is placed in the test box 101 of the present invention, the pressing plate 201 can be moved away from the top of the test box 101 under the action of the second telescopic power source 206, so as to facilitate the placement of the karst foundation 102 in the test box 101. After the karst foundation 102 is placed in the test box 101, the pressing plate 201 can be moved to the top of the cave 104 in the karst foundation 102 under the action of the second telescopic power source 206, so as to facilitate the pressing plate 201 to perform an ultimate bearing capacity simulation experiment on the karst foundation 102.

[0034] See also Figure 1 , Figure 6 and Figure 7 , the first moving assembly includes a first rotating power source 401, a third telescopic power source 402, a first mounting block 403 and a second slide groove 404; The first rotating power source 401 is not limited here, and its function is to provide rotating power, and it can be an AC motor, a stepping motor, etc.; The third telescopic power source 402 is not limited here, and its function is to provide telescopic power, and can be a cylinder, a hydraulic cylinder, a ball screw, etc.; The rotating end of the first rotating power source 401 is fixedly connected to the electric saw 301, the rotating axis of the first rotating power source 401 is parallel to the width direction of the karst foundation 102, and the first rotating power source 401 adjusts the cutting angle of the electric saw 301; The protruding end of the third telescopic power source 402 is fixedly connected to the fixed end of the first rotating power source 401, the telescopic axis of the third telescopic power source 402 is perpendicular to the rotation axis of the first rotating power source 401, the fixed end of the third telescopic power source 402 is fixedly connected to the first mounting block 403, the first mounting block 403 is provided with a second slide groove 404, the sliding guide direction of the second slide groove 404 is perpendicular to the rotation axis of the first rotating power source 401, and the protruding end of the third telescopic power source 402 is telescoped in the second slide groove 404.

[0035] In this embodiment, a karst foundation 102 with a cave 104 and a weak interlayer 103 is placed in a test box 101 to simulate a construction site, and then the pressure plate 201 applies a load to the upper end surface of the karst foundation 102. After the pressure plate 201 destroys the upper end surface of the karst foundation 102, according to the destruction situation, the second moving component moves the electric saw 301 to a specified cutting position, and the rotating component rotates the electric saw 301 to a specified cutting angle. Under the action of the first rotating power source 401, the electric saw 301 rotates 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 guide direction of the second slide groove 404 under the action of the third telescopic power source 402 to cut the karst foundation 102.

[0036] When the electric saw 301 of the present invention cuts the karst foundation 102, the electric saw 301 slides along the sliding guide direction of the second slide groove 404 under the drive of the third telescopic power source 402, and the second slide groove 404 limits the third telescopic power source 402 to move only along the sliding guide direction of the second slide groove 404, thereby ensuring that the cutting trajectory of the electric saw 301 on the karst foundation 102 is a smooth plane.

[0037] See also Figure 1 , Figure 6 and Figure 7 The rotating assembly includes a rotating disk 501, a rotating block 502, a second mounting block 503, a first gear 504, a second gear 505, a second rotating power source 506, a first rotating groove 507 and a second rotating groove 508; The second rotation power source 506 is not limited here, and its function is to provide rotation power, and it can be an AC motor, a stepping motor, etc.; One end of the rotating disk 501 close to the karst foundation 102 is fixedly connected to the first mounting block 403, and a first rotating groove 507 is provided on the end surface of the second mounting block 503 close to the karst foundation 102, and a second rotating groove 508 is provided in the first rotating groove 507, and the rotation axes of the first rotating groove 507 and the second rotating groove 508 coincide with each other, and 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 rotating power source 401, and the diameter of the first rotating groove 507 is smaller than the diameter of the second rotating groove 508; The end of the turntable 501 away from the karst foundation 102 is fixedly connected to 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 set in the second rotating groove 508, the end of the turntable 501 away from the karst foundation 102 is rotatably set in the first rotating groove 507, the turntable 501 is fixedly connected to a first gear 504, the rotation axis of the first gear 504 is consistent with the rotation axis of the turntable 501, the second rotating power source 506 is fixedly mounted on the second mounting block 503, the rotation axis of the second rotating power source 506 is parallel to the rotation axis of the first rotating power source 401, the rotating end of the second rotating power source 506 is fixedly connected to a second gear 505, and the second gear 505 is meshed with the first gear 504.

[0038] In this embodiment, a karst foundation 102 with a cave 104 and a weak interlayer 103 is placed in a test box 101 to simulate a construction site, and then the pressure plate 201 applies a load to the upper end surface of the karst foundation 102. After the pressure plate 201 destroys the upper end surface of the karst foundation 102, according to the destruction condition, the second moving component moves the electric saw 301 to a designated cutting position, and then starts the second rotating power source 506. The second rotating power source 506 drives the second gear 505 to rotate, and the second gear 505 drives the meshed first gear 504 to rotate, and the first gear 504 drives the turntable 501 to rotate together. When the turntable 501 rotates the electric saw 301 to a designated cutting angle, the second rotating power source 506 is turned off to wait for subsequent cutting operations.

[0039] The turntable 501 of the present invention can drive the electric saw 301 to rotate to a specified cutting angle to cut the karst foundation 102 under the action of the second rotating power source 506, so that a suitable cutting angle that can retain the most intact parts of the karst foundation 102 after cutting can be selected according to the specific damage situation of the karst foundation 102.

[0040] See also Figure 1 , Figure 6 and Figure 8 , the second moving assembly includes a fourth telescopic power source 601, a collection box 602 and a third chute 603; The fourth telescopic power source 601 is not limited here, and its function is to provide telescopic power, and can be a cylinder, a hydraulic cylinder, an electric telescopic rod, etc.; The collecting box 602 is located at one side of the test box 101 in the width direction, and the collecting box 602 is connected to the side wall of the test box 101, and the collecting box 602 collects the damaged part of the karst foundation 102 after cutting; The third slide groove 603 is horizontally opened on the side wall of the collection box 602, and the sliding guide direction of the third slide groove 603 is perpendicular to the rotation axis of the turntable 501, and the second mounting block 503 can slide along the sliding guide direction of the third slide groove 603; The extended 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 guide direction of the third slide groove 603 under the action of the fourth telescopic power source 601 .

[0041] In this embodiment, the second telescopic power source 206 is retracted to drive the pressing plate 201 to move out of the top of the test box 101, and the fourth telescopic power source 601 is extended to drive the electric saw 301 to move out of the top of the test box 101. The karst foundation 102 with the cave 104 and the weak interlayer 103 is placed in the test box 101. Then, the second telescopic power source 206 is extended to drive the pressing plate 201 to move to the top of the cave 104 in the karst foundation 102, and then the first telescopic power source 202 is extended to make the pressing plate 201 press the upper end surface of the karst foundation 102 until the pressing plate 201 presses the karst foundation 104. 2. According to the damage of the karst foundation 102, the second mounting block 503 drives the electric saw 301 to move to the specified cutting position under the extension of the fourth telescopic power source 601, and the turntable 501 drives the electric saw 301 to move to the specified cutting angle under the rotation of the second rotating power source 506. The electric saw 301 is rotated under the action of the first rotating power source 401 until the cutting blade is parallel to the extension direction of the third telescopic power source 402, and then the electric saw 301 is started and moves along the sliding guide direction of the second slide groove 404 under the action of the third telescopic power source 402 to cut the karst foundation 102.

[0042] When the karst foundation 102 is placed in the test box 101 of the present invention, not only can the pressing plate 201 be moved away from the top of the test box 101 under the action of the second telescopic power source 206, but the electric saw 301 can also be moved away from the top of the test box 101 under the action of the fourth telescopic power source 601, so as to facilitate placing the karst foundation 102 in the test box 101. After the karst foundation 102 is placed in the test box 101, the electric saw 301 can cut the karst foundation 102 along the sliding guide direction of the second slide groove 404 under the action of the third telescopic power source 402, and the structural design is ingenious.

[0043] See also 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 slide groove 705 and an opening 706; The fifth telescopic power source 701 is not limited here, and its function is to provide telescopic power, and can be a cylinder, a hydraulic cylinder, an electric telescopic rod, etc.; The receiving plate 702 is located in the test box 101, the karst foundation 102 is placed on the receiving plate 702, the extended 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; An opening 706 is provided on the side wall of the test box 101 away from the cutting unit, and the height of the opening 706 is consistent with the height of the karst foundation 102. The upper and lower end surfaces of the opening 706 are horizontally provided with fourth slide grooves 705, and the sliding guide direction of the fourth slide groove 705 is parallel to the length direction of the test box 101. The second mounting plate 704 is installed in the fourth slide groove 705, and the second mounting plate 704 can slide in the opening 706 through the fourth slide groove 705 to open or close the end surface of the test box 101 away from the cutting unit. The baffle 703 is fixed to the receiving plate 702, and is located on the side wall of the receiving plate 702 close to the cutting unit. The upper end surface of the baffle 703 is higher than the upper end surface of the receiving plate 702, and the baffle 703 is located at the end of the receiving plate 702 in the length direction away from the ultimate bearing capacity simulation unit. The side walls on both sides of the test box 101 in the length direction, the side walls of the baffle 703 close to the second mounting plate 704, the upper end surface of the receiving plate 702 and the side walls of the second mounting plate 704 close to the baffle 703 form a simulated experimental space for the karst foundation 102.

[0044] In this embodiment, the karst foundation 102 is placed on the receiving plate 702 by a crane, and 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 of the length direction of the test box 101, the side walls of the baffle 703 close to the second mounting plate 704, the upper end surface of the receiving plate 702, and the side walls of the second mounting plate 704 close to the baffle 703 are close to the corresponding end surfaces of the side walls around the karst foundation 102, so that a simulated experimental space of the karst foundation 102 is formed between the side walls on both sides of the length direction of the test box 101, the side walls of the baffle 703 close to the second mounting plate 704, the upper end surface of the receiving plate 702, and the side walls of the second mounting plate 704 close to the baffle 703, waiting for subsequent experiments.

[0045] The present invention uses the side walls on both sides of the length direction of the test box 101, the baffle 703 and the second mounting plate 704 to tightly fit 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 ultimate bearing capacity simulation test and cutting of the karst foundation 102, and when it is necessary to cut the lower part of the karst foundation 102 during the cutting of the karst foundation 102, the fifth telescopic power source 701 can be extended to push the karst foundation 102 upward to cooperate with the cutting trajectory of the electric saw 301 to cut the karst foundation 102.

[0046] See also Figure 1 , Figure 2 and Figure 8The simulation experiment system further includes a classification collection unit, which includes a push-pull plate 801, a third mounting block 802, a sixth telescopic power source 803 and a seventh telescopic power source 804; The sixth telescopic power source 803 and the seventh telescopic power source 804 are not limited here, and their function is to provide telescopic power, and they can be a cylinder, a hydraulic cylinder, an electric telescopic rod, etc.; 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 box 101, and the diameter of the push-pull plate 801 is the same as the diameter of the cave 104. The side wall of the second mounting plate 704 close to the sixth telescopic power source 803 is provided with a circular groove 805, and the diameter of the circular groove 805 is the same as the diameter of the 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 in the same horizontal plane, and the push-pull plate 801 can move along the width direction of the karst foundation 102 and extend into the circular groove 805; The extended end of the sixth telescopic power source 803 is fixedly connected to one end of the push-pull plate 801, the diameter of the extended 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 box 101, and the push-pull plate 801 can be extended into or moved out of the circular groove 805 under the action of the sixth telescopic power source 803; The fixed end of the seventh telescopic power source 804 is horizontally mounted on the third mounting block 802, and the third mounting block 802 is fixed to the ground. The extended end of the seventh telescopic power source 804 is fixed to the fixed end of the sixth telescopic power source 803, and the telescopic axis of the seventh telescopic power source 804 is parallel to the sliding guide direction of the fourth slide groove 705. The sixth telescopic power source 803 moves along the sliding guide direction of the fourth slide groove 705 at the left and right bottom 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 guide direction of the fourth slide groove 705 to open or close the end face of the test box 101 away from the cutting unit. The push-pull plate 801 can push away the damaged part of the karst foundation 102 after cutting under the action of the sixth telescopic power source 803 , and the push-pull plate 801 can recover the intact part of the karst foundation 102 after cutting under the reverse action of the sixth telescopic power source 803 .

[0047] In this embodiment, the sixth telescopic power source 803 extends to make the push-pull plate 801 enter the circular groove 805, and then the seventh telescopic power source 804 retracts to drive the sixth telescopic power source 803 to move, and the sixth telescopic power source 803 slides the second mounting plate 704 along the fourth slide groove 705 through the push-pull plate 801 to close the end face of the test box 101 away from the cutting unit, and then puts the karst foundation 102 into the receiving plate 702 in the test box 101, and when putting it in, the lower end of the weak interlayer 103 is close to the ultimate bearing capacity simulation unit, and the karst foundation 102 is placed on the receiving plate 702 in the test box 101. After the ultimate bearing capacity simulation experiment and cutting are carried out, the fifth telescopic power source 701 lowers the receiving plate 702 to a height at which the push-pull plate 801 can push away the damaged part of the karst foundation 102 after cutting, the seventh telescopic power source 804 extends to drive the sixth telescopic power source 803 to move, and the sixth telescopic power source 803 slides the second mounting plate 704 along the fourth slide groove 705 through the push-pull plate 801 to open the end face of the test box 101 away from the cutting unit, and then the sixth telescopic power source 803 retracts to make the push-pull plate 801 move out of the circular groove 805, and then the seventh telescopic power source 804 extends to drive the sixth telescopic power source 803 to move, and the sixth telescopic power source 803 slides the second mounting plate 704 along the fourth slide groove 705 through the push-pull plate 801 to open the end face of the test box 101 away from the cutting unit. 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 of the karst foundation 102 after cutting. The sixth telescopic power source 803 extends so that the push-pull plate 801 contacts the damaged part of 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 passes through the upper end surface of the receiving plate 702 and pushes the damaged part of the karst foundation 102 after cutting into the collection box 602. Then the fifth telescopic power source 701 extends the receiving plate 702 to the receiving plate 702. The upper end surface of the plate 702 is flush with the lower end surface of the opening 706, and then the seventh telescopic power source 804 moves the extended end of the sixth telescopic power source 803 to the side wall of the extended end of the sixth telescopic power source 803 to fit the cut surface of the karst foundation 102, and then the sixth telescopic power source 803 retracts to fit the end surface portion close to the push-pull plate 801 located in the collection box 602 and the intact part of the karst foundation 102 after cutting, and then the sixth telescopic power source 803 continues to retract and pulls back the intact part of the karst foundation 102 after cutting through the push-pull plate 801.

[0048] After cutting, the karst foundation 102 of the present invention is divided into an intact part and a damaged part, and the damaged part is located above the intact part. The push-pull plate 801 pushes the damaged part into the collection box 602 for collection under the extension of the sixth telescopic power source 803. When pushed out, the side walls on both sides of the test box 101 in the length direction and the upper end of the receiving plate 702 are tightly fitted to the karst foundation 102, and the baffle 703 is tightly fitted to the intact part. Therefore, when the damaged part is pushed into the collection box 602, the intact part is in the test box 101. No movement will occur, and then the push-pull plate 801 can pull back the intact part under the retraction of the sixth telescopic power source 803. When pulling back, the side wall of the extended end of the sixth telescopic power source 803 fits tightly on the cut surface of the intact part, and the side wall of the test box 101 in the length direction away from the ultimate bearing capacity simulation unit and the upper end of the receiving plate 702 fit tightly against the intact part, so the intact part can move smoothly along the width direction of the test box 101 during the process of the sixth telescopic power source 803 being pulled back by the push-pull plate 801.

[0049] See also Figure 8 , the classification and collection unit also includes a transfer plate 806, a handle 807 and a slide rail 808; The opposite end faces of the test box 101 and the third mounting block 802 are both provided with sliding rails 808, and the sliding guide direction of the sliding rails 808 is parallel to the sliding guide direction of the fourth slide groove 705. A transfer plate 806 is slidably installed between the two sliding rails 808, and 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 intact part of the karst foundation 102 after cutting. A handle 807 is fixedly connected to one end of the transfer plate 806, and the transfer plate 806 moves along the sliding guide direction of the sliding rail 808 driven by the handle 807.

[0050] In this embodiment, when the sixth telescopic power source 803 pulls back the intact part of the karst foundation 102 after being cut, the sixth telescopic power source 803 retracts by fitting the push-pull plate 801 located in the collection box 602 with the end surface portion close to the intact part of the karst foundation 102 after being cut, and then the sixth telescopic power source 803 continues to retract, and the intact part of the karst foundation 102 after being cut is completely pulled back to the transfer plate 806 through the push-pull plate 801, and then the seventh telescopic power source 804 extends the sixth telescopic power source 803 to a position away from the intact part of the karst foundation 102 after being cut, and at the same time, the sixth telescopic power source 803 retracts the push-pull plate 801 out of the upper end surface of the transfer plate 806, and then the staff pulls the transfer plate 806 by the handle 807 and moves it along the slide rail 808 for a distance to take out the intact part of the karst foundation 102 after being cut.

[0051] According to the present invention, after the intact part of the karst foundation 102 is pulled out after cutting, it can be taken out immediately with the cooperation of the staff, so as to facilitate the test of the next karst foundation 102, and after taking out the intact part of the karst foundation 102 after cutting, the new karst foundation 102 can be prepared immediately.

[0052] See also Figure 8 , the simulation experiment system also includes a sliding door 901 and an eighth telescopic power source 902; The sliding door 901 is arranged on the side wall on one side of the collection box 602 in the length direction, the protruding end of the eighth telescopic power source 902 is fixed on 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.

[0053] In this embodiment, when the damaged parts of the karst foundation 102 after cutting are pushed into the collection box 602 sufficiently, the eighth telescopic power source 902 retracts to move the sliding door 901 and then open the collection box 602, and then the staff will centrally process the damaged parts of the karst foundation 102 after cutting in the collection box 602.

[0054] During multiple experiments, the present invention can wait until the damaged parts of the karst foundation 102 after cutting are filled in the collection box 602 sufficiently before centralized and unified processing, thereby avoiding processing the damaged parts of the karst foundation 102 after cutting for each experiment, which wastes experimental time.

[0055] See also Figure 1 and Figure 6 , the simulation experiment system also includes a camera 1001; The camera 1001 is installed on the end surface of the turntable 501 close to the karst foundation 102, and the camera 1001 collects image data of the damage of the karst foundation 102; The number of cameras 1001 is not limited here, and can be one or more. In this embodiment, the number of cameras 1001 is two.

[0056] In this embodiment, when the karst foundation 102 is conducting an ultimate bearing capacity simulation experiment, the camera 1001 remains turned on. When a collapse occurs in the cave 104 of the karst foundation 102, the camera 1001 captures the image data at this time, records the time of the collapse, and the size of the load applied by the first telescopic power source 202 to the karst foundation 102, thereby deriving the ultimate bearing capacity of the karst foundation 102 when the karst foundation 102 collapses.

[0057] The present invention can perform ultimate bearing capacity simulation experiments on karst foundations 102 of different geology generated by weak interlayers 103 at different angles, and during the experiment, the camera 1001 is used to capture image data of the karst foundation 102 when it collapses, and the load size of the first telescopic power source 202 pressing on the karst foundation 102 at the time of collapse is recorded, so as to obtain the ultimate bearing capacity of each karst foundation 102 when it collapses, and compare the angles corresponding to the weak interlayers 103 in the collapsed karst foundation 102 when the ultimate bearing capacity is the largest, so as to select the karst foundation 102 of this angle for construction in actual engineering, and ensure the safety of construction.

[0058] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall 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 transfer 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