Concealed karst cave backfilling construction device and construction method

Abstract

The invention discloses a hidden karst cave backfilling construction device and method, and relates to the technical field of karst cave backfilling. An equipment supporting plate is placed at a drilling hole above a hidden karst cave, a feeding barrel is arranged in the center of the equipment supporting plate, a supporting frame is arranged in the middle of the feeding barrel, and a control assembly is connected to the lower portion of the supporting frame; a connecting cylinder is coaxially arranged below the feeding cylinder, a discharging cylinder is coaxially arranged below the connecting cylinder, a compression spring is arranged in the center of the fixing frame, the end, away from the fixing frame, of the compression spring is connected with an extrusion block, a discharging assembly is arranged on the circumferential surface of the extrusion block, and the control assembly drives the discharging cylinder to move towards the deep position of the hidden karst cave. According to the device, the problems that when the karst cave is backfilled, the backfilling material cannot be uniformly paved in the karst cave, so that manual operation is needed, meanwhile, the continuous tamping phenomenon is needed, and the filling efficiency of the karst cave is improved are solved. And therefore, the hidden karst cave backfilling efficiency is low.

Description

Technical Field

[0001] The present invention relates to the technical field of karst cave backfilling, and more specifically to a concealed karst cave backfilling construction device and construction method. Background Art

[0002] Concealed karst caves generally refer to those underground karst caves that are not easily discovered. Due to various reasons, they are hidden beneath the surface and are difficult to directly detect. During tunnel excavation, concealed karst caves may affect the construction progress and safety. Therefore, it is necessary to carry out appropriate backfilling and reinforcement. Before construction, detailed geological exploration is carried out, and technical means such as ground-penetrating radar and drilling are used to determine the location, size, and shape of the concealed karst cave. Subsequently, a suitable backfilling method is selected according to the nature and size of the karst cave. After backfilling, ground settlement detection is required to detect whether abnormal settlement occurs in the backfilled area.

[0003] The existing methods for backfilling concealed karst caves mainly include grouting backfilling, gravel backfilling, mixed filling, injection filling, and foam concrete. Mixed filling is mainly used to backfill concealed karst caves. First, the scale, shape, and geological conditions of the karst cave are determined. According to detailed on-site investigation, the requirements for backfilling materials are determined. Subsequently, the backfilling materials are mixed according to a ratio. In order to ensure the geological conditions after backfilling, sometimes other reinforcing agents or chemical additives are added to the backfilling materials. Drill holes above the concealed karst cave, clean the soil and sundries in the karst cave, so as to ensure good bonding between the backfilling materials and the inner wall of the karst cave. Subsequently, the mixed materials are filled into the karst cave in layers. After each layer is filled, the karst cave is tamped and compacted to ensure the density and stability of the backfilling materials. Since the drilling diameter is small when drilling in concealed karst caves, when backfilling materials such as concrete are added, the inner corners of the concealed karst cave cannot be evenly filled with backfilling materials, resulting in local settlement and deformation, and reducing the bearing capacity of the foundation. Therefore, when backfilling in layers in the existing technology, the operation of adding a layer of backfilling materials and tamping the backfilling materials is mainly adopted to ensure the density of the backfilling materials inside the concealed karst cave, but this operation will result in too high time cost and reduce the overall backfilling efficiency of the concealed karst cave.

[0004] In view of the above situation, the present invention designs a concealed karst cave backfilling construction device and construction method to solve the above technical problems. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a concealed karst cave backfilling construction device and construction method. This device solves the problem that when backfilling a karst cave, the backfilling materials cannot be evenly spread over the inside of the karst cave, resulting in the need for manual operation and continuous tamping, thus leading to low backfilling efficiency of the concealed karst cave.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A concealed karst cave backfilling construction device for uniformly backfilling the inside of a concealed karst cave, including an equipment support plate, the equipment support plate is placed at the drilling hole above the concealed karst cave, and the equipment support plate is placed above the concealed karst cave through a fixed seat. A feeding cylinder is arranged at the central position of the equipment support plate. The feeding cylinder is coaxial with the drilling hole above the concealed karst cave, and a feeding hopper is arranged above the feeding cylinder. The feeding hopper is a conical structure with a wide upper part and a narrow lower part. A support frame is arranged in the middle of the feeding cylinder. A control assembly is connected below the support frame. A connecting cylinder is coaxially arranged below the feeding cylinder. A discharging cylinder is coaxially arranged below the connecting cylinder. A through hole is opened below the discharging cylinder. A fixing frame is arranged below the discharging cylinder. A compression spring is arranged at the central position of the fixing frame. One end of the compression spring away from the fixing frame is connected with a pressing block, and the pressing block is connected with the control assembly. A discharging assembly is arranged on the circumferential surface of the pressing block. The control assembly drives the discharging cylinder to move deep into the concealed karst cave. The discharging cylinder drives the connecting cylinder to move synchronously. The control assembly continuously drives the discharging cylinder to move deep into the concealed karst cave. The control assembly pushes the pressing block so that the compression spring is compressed, thereby changing the discharging assembly from a contracted state to an expanded state.

[0008] Preferably, the contact part between the connecting cylinder and the feeding cylinder is a stepped structure, and a connecting spring is arranged at the contact part. The contact part between the connecting cylinder and the discharging cylinder is the same stepped structure.

[0009] Preferably, the connecting cylinder and the discharging cylinder are conical structures with a large upper end and a small lower end, and a conical inclined surface is opened at the contact position between the connecting cylinder and the feeding cylinder and between the connecting cylinder and the discharging cylinder.

[0010] Preferably, the control assembly includes a control motor, a telescopic member, a rotating cylinder, a telescopic cylinder, and a pushing cylinder. The control motor is vertically arranged below the support frame, and the output end of the control motor is connected with the telescopic member. A rotating cylinder is arranged outside the control motor, and the rotating cylinder is rotatably arranged below the support frame. A moving groove is opened inside the rotating cylinder. The telescopic cylinder is coaxially arranged with the rotating cylinder, and one end of the telescopic cylinder is attached to the moving groove of the rotating cylinder. A moving groove consistent with the rotating cylinder is opened inside the telescopic cylinder. The discharging cylinder is coaxially arranged with the telescopic cylinder, and one end of the discharging cylinder is attached to the moving groove opened inside the telescopic cylinder. One end of the telescopic member away from the control motor is attached to the bottom end of the pushing cylinder.

[0011] Preferably, spiral protrusions are arranged on the circumferential surfaces of the rotating cylinder, the telescopic cylinder, and the pushing cylinder, and the spiral protrusions arranged on the rotating cylinder, the telescopic cylinder, and the pushing cylinder gradually decrease in support. The spiral protrusions are trapezoidal structures, and the side of the spiral protrusions in contact with the rotating cylinder, the telescopic cylinder, and the pushing cylinder is the long side.

[0012] Preferably, a cross-shaped protrusion is provided at the bottom end of the pushing cylinder, and a corresponding cross-shaped groove is formed at one end of the extrusion block in contact with the pushing cylinder.

[0013] Preferably, the unfolding assembly includes a push rod, a connecting rod, and a discharge pipe. The push rod is rotatably installed on the circumferential surface of the extrusion block, and multiple groups of push rods are provided. One end of the push rod away from the extrusion block is installed with a connecting rod, and the other end of the connecting rod is installed with a discharge pipe. The discharge pipe is arranged in a fixing groove formed on the discharge cylinder, and the end of the discharge pipe away from the connecting rod is of a conical structure. The number of the push rods, the connecting rods, and the discharge pipes is the same.

[0014] Preferably, a movement cavity is formed above the fixing groove, and a plurality of fixing springs are arranged at the bottom of the movement cavity. The other end of the fixing spring is connected with a telescopic baffle, and arc-shaped notches which are mutually fitted are formed at the contact position between the telescopic baffle and the discharge pipe.

[0015] Preferably, both the support frame and the fixing frame are of a structure with a narrow upper end and a wide lower end, and a circulation groove for the circulation of backfill materials is formed at the middle position between the support frame and the fixing frame.

[0016] Preferably, a construction method for backfilling a hidden karst cave adopts a hidden karst cave backfilling construction device according to any one of claims 1 to 9, and is characterized in that the using method includes the following steps:

[0017] S1: First, detect the range, depth, and structure of the karst cave through a geological radar, analyze the influence of the karst cave on buildings or the surrounding environment. After determining the position of the karst cave, drill holes at the bottom of the karst cave, and clean the sundries inside the karst cave after drilling.

[0018] S2: Place the equipment support plate on the top of the karst cave through the fixing seat. At this time, start the control motor, and drive the telescopic member to extend deep into the karst cave through the control motor. The telescopic member drives the feeding cylinder, the connecting cylinder, and the discharge cylinder to move into the karst cave.

[0019] S3: The telescopic member drives the discharge cylinder to move to a specified position, add backfill materials into the feeding hopper. The backfill materials in the feeding hopper flow downward along the inner walls of the feeding cylinder, the connecting cylinder, and the discharge cylinder, and ensure the uniform falling of the backfill materials through the control assembly.

[0020] S4: The telescopic member continues to move downward. The telescopic member pushes the extrusion block to drive the unfolding of the discharge assembly, and makes the backfill materials uniformly fill the inside of the karst cave through the rotation of the telescopic member.

[0021] S5: After the backfilling is completed, compact the backfill materials inside the karst cave through a compaction device.

[0022] The beneficial effects of the present invention:

[0023] 1. A concealed karst cave backfilling construction device and construction method provided by the present invention. The device drives the pushing cylinder through the telescopic member, and the pushing cylinder drives the discharging cylinder to move deep into the karst cave. When the discharging cylinder moves to the designated position, the telescopic member is driven to rotate by controlling the motor. At this time, when the backfilling material enters from the feeding hopper, it can enter the karst cave evenly and smoothly, thus avoiding the backfilling material being blocked inside the discharging cylinder and causing subsequent inability to backfill. While ensuring smoothness, the backfilling material can be evenly laid inside the karst cave, avoiding large gaps between the backfilling materials, and thus avoiding the situation of tamping every time a backfilling material is added, thereby improving the efficiency of karst cave backfilling.

[0024] 2. A concealed karst cave backfilling construction device and construction method provided by the present invention. The device can ensure that the backfilling material enters the karst cave evenly as a whole through the control component, and at the same time can avoid the phenomenon of solid-liquid separation of the concrete during concrete pouring. Facing backfilling materials of different sizes, through the extrusion between the spiral protrusions and the inner wall of the feeding cylinder, the sizes of the backfilling materials can be made uniform, thereby ensuring the compactness of karst cave backfilling.

[0025] 3. A concealed karst cave backfilling construction device and construction method provided by the present invention. The device, through the cooperation of the control component and the unfolding component, when the telescopic member moves to the limit position, the telescopic member continues to move to push the extrusion block, and the discharging pipe is driven to unfold by the extrusion block. At this time, the telescopic member is driven to rotate by controlling the motor, and at this time, the discharging cylinder generates a centrifugal force, and the backfilling material inside the discharging cylinder is thrown out by the centrifugal force to cover the inside of the karst cave, thereby improving the efficiency of the entire karst cave backfilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 is a cross-sectional view of the overall structure of the control component cooperating with the discharging component of the present invention;

[0028] Figure 3 is a schematic diagram of the overall structure of the control component of the present invention;

[0029] Figure 4 is a schematic diagram of the overall structure of the discharging component of the present invention;

[0030] Figure 5 is a cross-sectional view of the overall structure of the discharging component of the present invention;

[0031] Figure 6 For the present invention Figure 5 is a partial enlarged view of part A in

[0032] Reference numerals:

[0033] 1. Equipment support plate; 11. Fixed seat; 2. Feeding cylinder; 21. Feeding hopper; 22. Support frame; 3. Connecting cylinder; 31. Connecting spring; 32. Conical inclined plane; 4. Control assembly; 41. Control motor; 42. Telescopic member; 421. Cross projection; 43. Rotating cylinder; 431. Spiral projection; 432. Trapezoidal structure; 433. Moving groove; 44. Telescopic cylinder; 45. Pushing cylinder; 5. Discharge cylinder; 51. Fixed frame; 52. Compression spring; 53. Extrusion block; 531. Cross groove; 54. Fixed groove; 541. Movement cavity; 55. Discharge assembly; 551. Pushing rod; 552. Connecting rod; 553. Discharge pipe; 5531. Conical structure; 554. Telescopic baffle; 555. Fixed spring; Detailed implementation manners

[0034] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0035] Refer to Figure 1 、 Figure 2 、 Figure 3 , a concealed karst cave backfilling construction device for uniformly backfilling the inside of a concealed karst cave, comprising an equipment support plate 1, the equipment support plate 1 is placed at the drilling hole above the concealed karst cave, and the equipment support plate 1 is placed above the concealed karst cave through a fixed seat 11. A feeding cylinder 2 is arranged at the central position of the equipment support plate 1. The feeding cylinder 2 is coaxial with the drilling hole above the concealed karst cave, and a feeding hopper 21 is arranged above the feeding cylinder 2. The feeding hopper 21 is a conical structure with a wider upper part and a narrower lower part. A support frame 22 is arranged in the middle of the feeding cylinder 2. The lower part of the support frame 22 is connected with a control assembly 4. A connecting cylinder 3 is coaxially arranged below the feeding cylinder 2. A discharge cylinder 5 is coaxially arranged below the connecting cylinder 3. A through hole is opened below the discharge cylinder 5. A fixed frame 51 is arranged below the discharge cylinder. A compression spring 52 is arranged at the central position of the fixed frame 51. One end of the compression spring 52 away from the fixed frame 51 is connected with an extrusion block 53, and the extrusion block 53 is connected with the control assembly 4. A discharge assembly 55 is arranged on the circumferential surface of the extrusion block 53. The control assembly 4 drives the discharge cylinder 5 to move deeper into the concealed karst cave. The discharge cylinder 5 drives the connecting cylinder 3 to move synchronously. The control assembly 4 continuously drives the discharge cylinder 5 to move deeper into the concealed karst cave. The control assembly 4 pushes the extrusion block 53 so that the compression spring 52 is compressed, thereby changing the discharge assembly 55 from a contracted state to an expanded state.

[0036] During the working process, the operator first determines the specific location of the concealed karst cave. After determining the specific location, drilling is carried out at the top of the karst cave. After drilling, the support plate is set on the top of the karst cave through the fixed seat 11. The feeding cylinder 2 is coaxially arranged with the hole at the top of the karst cave. At this time, the control component 4 drives the discharging cylinder 5 to move deep into the karst cave. During the downward movement of the discharging cylinder 5, the connecting cylinder 3 moves synchronously downward. After the discharging cylinder 5 moves to the designated position, the control component 4 drives the discharging cylinder 5 to rotate. Since the discharging cylinder 5 and the connecting cylinder 3 are rotatably arranged, at this time, the discharging cylinder 5 rotates relative to the connecting cylinder 3. The operator places the backfill material in the feeding hopper 21. Through the conical structure of the feeding hopper 21, the backfill material moves downward. The conical structure with a wider top and a narrower bottom has a larger storage space compared to the feeding hopper 21 of other structures, and at the same time, it can make the material flow into the feeding cylinder 2 evenly and slowly. The backfill material flows into the interior of the feeding cylinder 2. Through the rotation of the control component 4, the backfill material evenly and orderly enters the discharging cylinder 5 through the connecting cylinder 3. Through the through hole arranged below the discharging cylinder 5, the backfill material can flow to the bottom of the karst cave. At this time, in order to improve the overall backfill efficiency of the karst cave or avoid the interior corners of the karst cave being filled with backfill material, the control component 4 stops rotating, and the control continues to move downward. At this time, the control component 4 pushes the extrusion block 53, so that the compression spring 52 is compressed, and the discharging component 55 changes from the contracted state to the unfolded state. The control component 4 stops moving and changes to rotation. The centrifugal force generated by the rotation of the control component 4 can throw the backfill material out through the discharging component 55, so as to fill the entire interior of the karst cave with the backfill material, thereby improving the overall backfill efficiency of the karst cave while ensuring the backfill quality of the karst cave.

[0037] The contact part between the connecting cylinder 3 and the feeding cylinder 2 is a stepped structure, and a connecting spring 31 is arranged at the contact part. The contact part between the connecting cylinder 3 and the discharging cylinder 5 is the same stepped structure. The design of the stepped structure enables the connecting cylinder 3 to slide inside the feeding cylinder 2, and the connection through the connecting spring 31 can prevent the feeding cylinder 2 from being unable to reset due to position limitation after being pushed out. No connecting spring 31 is arranged between the connecting cylinder 3 and the discharging cylinder 5 to prevent the connecting spring 31 from being stuck between the discharging cylinder 5 and the connecting cylinder 3 during the rotation of the discharging cylinder 5, resulting in the overall inability of the device to move and ensuring the smooth movement of the device.

[0038] The connecting cylinder 3 and the discharge cylinder 5 are in a conical structure with a larger upper end and a smaller lower end. The conical structure with a larger upper end and a smaller lower end enables the backfill material to flow downward due to its own gravity, avoiding blockage of the backfill material in the connecting cylinder 3 and the discharge cylinder 5. Thus, the backfill material gradually flows to the through-hole of the discharge cylinder 5, which helps to maintain the uniformity and stability of the flow of the backfill material. Moreover, a conical inclined surface 32 is provided at the contact position between the connecting cylinder 3 and the feeding cylinder 2 and between the connecting cylinder 3 and the discharge cylinder 5. The conical inclined surface 32 can prevent the backfill material from blocking on the stepped structure between the feeding cylinder 2, the connecting cylinder 3, and the discharge cylinder 5, which would jam the feeding cylinder 2, the connecting cylinder 3, and the discharge cylinder 5 during long-term operation, thereby ensuring the smooth movement of the overall device.

[0039] The control assembly 4 includes a control motor 41, a telescopic member 42, a rotating cylinder 43, a telescopic cylinder 44, and a pushing cylinder 45. The control motor 41 is vertically arranged below the support frame 22, and the output end of the control motor 41 is connected to the telescopic member 42. A rotating cylinder 43 is arranged outside the control motor 41, and the rotating cylinder 43 is rotatably arranged below the support frame 22. A moving groove 433 is formed inside the rotating cylinder 43. The telescopic cylinder 44 is coaxially arranged with the rotating cylinder 43, and one end of the telescopic cylinder 44 is in contact with the moving groove 433 of the rotating cylinder 43. A moving groove 433 identical to that of the rotating cylinder 43 is formed inside the telescopic cylinder 44. The discharge cylinder 5 is coaxially arranged with the telescopic cylinder 44, and one end of the discharge cylinder 5 is in contact with the moving groove 433 formed inside the telescopic cylinder 44. The end of the telescopic member 42 away from the control motor 41 is in contact with the bottom end of the pushing cylinder 45.

[0040] During the working process, the operator first controls the telescopic member 42 to move downward. The telescopic member 42 in this application is a multi-stage telescopic structure in the prior art. By moving the telescopic member 42 downward, the pushing cylinder 45 is driven to move downward. The pushing cylinder 45 moves in the moving groove 433 formed on the inner wall of the telescopic cylinder 44. When the pushing cylinder 45 moves to the bottom end of the moving groove 433, the pushing cylinder 45 drives the telescopic cylinder 44 to move downward. The telescopic cylinder 44 moves in the moving groove 433 of the rotating cylinder 43. The distance that the pushing cylinder 45 moves downward determines the distance that the discharge cylinder 5 moves downward. When the discharge cylinder 5 moves to the specified distance, when the discharge cylinder 5 moves to the specified position, the operator can place the backfill material in the feed hopper 21 so that the backfill material enters the discharge cylinder 5 from the feed hopper 21.

[0041] Spiral protrusions 431 are provided on the outer circumferential surfaces of the rotating cylinder 43, the telescopic cylinder 44, and the pushing cylinder 45, and the spiral protrusions 431 provided on the rotating cylinder 43, the telescopic cylinder 44, and the pushing cylinder 45 gradually decrease in support. The spiral protrusion 431 is in a trapezoidal structure 432, and the side in contact with the rotating cylinder 43, the telescopic cylinder 44, and the pushing cylinder 45 is the long side.

[0042] During the working process, the control motor 41 drives the telescopic member 42 to rotate. Since the end of the telescopic member 42 is fixedly connected to the pushing cylinder 45, the rotation of the telescopic member 42 drives the pushing cylinder 45 to rotate. The rotation of the pushing cylinder 45 can drive the telescopic cylinder 44 and the rotating cylinder 43 to rotate. At this time, the spiral protrusions 431 on the outer circumferential surfaces of the rotating cylinder 43, the telescopic cylinder 44, and the pushing cylinder 45 can ensure that the backfill material flows downward evenly and smoothly, avoiding the backfill material from clogging inside the device. At the same time, it can cooperate with the inner walls of the feeding cylinder 2, the connecting cylinder 3, and the discharging cylinder 5 to crush the backfill materials of different sizes, making their sizes consistent, reducing the gaps between the backfill materials inside the karst cave, thereby reducing the time for compacting the backfill materials in the later stage, and further improving the overall backfill efficiency of the karst cave. The gradually decreasing spiral protrusions 431 can make the mechanism of the pushing cylinder 45 and the telescopic cylinder 44 contracting into the rotating cylinder 43 compact.

[0043] A cross-shaped protrusion 421 is provided at the bottom end of the pushing cylinder 45. A corresponding cross-shaped groove 531 is opened at one end of the extrusion block 53 in contact with the pushing cylinder 45. Through such a setting, when the pushing cylinder 45 contacts the extrusion block 53 and the cross-shaped protrusion 421 contacts the cross-shaped groove 531, they can be combined more stably. At the same time, when the pushing cylinder 45 moves downward, the phenomenon that the pushing cylinder 45 falls off from the cross-shaped groove 531 can be avoided. When the pushing cylinder 45 rotates due to the rotation of the telescopic member 42, the cross-shaped protrusion 421 and the cross-shaped groove 531 can ensure that the pushing cylinder 45 can drive the discharging cylinder 5 to rotate smoothly.

[0044] The discharging assembly 55 includes a push rod 551, a connecting rod 552, and a discharging pipe 553. The push rod 551 is rotatably installed on the circumferential surface of the extrusion block 53, and multiple groups of push rods 551 are provided. One end of the push rod 551 away from the extrusion block 53 is installed with a connecting rod 552, and the other end of the connecting rod 552 is installed with a discharging pipe 553. The discharging pipe 553 is arranged in a fixing groove 54 opened on the discharging cylinder 5, and one end of the discharging pipe 553 away from the connecting rod 552 is a conical structure 5531. The numbers of the push rod 551, the connecting rod 552, and the discharging pipe 553 are the same.

[0045] During the working process, the pushing cylinder 45 pushes the extrusion block 53 to move downward to compress the compression spring 52. As the extrusion block 53 moves downward, one end of the push rod 551 moves downward along with the extrusion block 53. The other end of the push rod 551 is connected to a connecting rod 552. Since the end of the connecting rod 552 away from the push rod 551 is connected to the discharge pipe 553, the connecting rod 552 drives one end of the discharge pipe 553 to move downward. At this time, the other end of the discharge pipe 553 moves upward. At this time, the extrusion block 53 pushes the compression spring 52 so that the compression spring 52 reaches the limit position. When the compression spring 52 is in the limit position, the pushing cylinder 45 drives the extrusion block 53 to rotate. The extrusion block 53 drives the discharge pipe 553 to rotate through the push rod 551 and the connecting rod 552. At this time, the discharge pipe 553 drives the entire discharge cylinder 5 to rotate. Through the conical structure 5531 of the discharge pipe 553, the backfill material can be ejected in a larger range.

[0046] Above the fixed groove 54, a movement cavity 541 is opened, and a plurality of fixed springs 555 are arranged at the bottom of the movement cavity 541. The other ends of the fixed springs 555 are connected to a telescopic baffle 554. The telescopic baffle 554 is provided with arc-shaped notches that fit each other at the contact position with the discharge pipe 553. Through such a setting, during the upward movement of the discharge pipe 553, the discharge pipe 553 pushes the telescopic baffle 554 to move upward. At this time, the arc-shaped notch of the telescopic baffle 554 contacts the surface of the discharge pipe 553. When the discharge pipe 553 rotates to throw out the backfill material, the backfill material will not flow out through the gap between the discharge pipe 553 and the telescopic baffle 554, thus ensuring the sealing effect of the discharge pipe 553 on the backfill material.

[0047] Both the support frame 22 and the fixed frame 51 are structures with a narrow upper end and a wide lower end, and a flow-through groove for the backfill material to flow through is opened at the middle position of the support frame 22 and the fixed frame 51. Through such a setting, when the backfill material passes through the support frame 22 and the fixed frame 51, the backfill material will slide downward along the surfaces of the support frame 22 and the fixed frame 51, thereby avoiding the backfill material from accumulating on the surfaces of the support frame 22 and the fixed frame 51, and further avoiding wasting a large amount of time to clean the backfill material on the fixed frame 51 and the support frame 22 later. The flow-through groove is mainly used to allow the backfill material to flow downward.

[0048] A construction method for backfilling concealed karsts, which uses a concealed karst backfilling construction device according to any one of claims 1 to 9, is characterized in that: the usage method includes the following steps:

[0049] S1: First, detect the range, depth and structure of the karst through a geological radar, analyze the impact of the karst on the building or the surrounding environment. After determining the location of the karst, drill holes at the bottom of the karst, and clean the sundries inside the karst after drilling;

[0050] S2: Place the equipment support plate 1 on the top of the karst cave through the fixed seat 11. At this time, start the control motor 41, and drive the telescopic member 42 to extend deep into the karst cave through the control motor 41. The telescopic member 42 drives the feed cylinder 2, the connecting cylinder 3 and the discharge cylinder 5 to move into the karst cave;

[0051] S3: The telescopic member 42 drives the discharge cylinder 5 to move to the designated position, add the backfill material into the feed hopper 21. The backfill material in the feed hopper 21 flows downward along the inner walls of the feed cylinder 2, the connecting cylinder 3 and the discharge cylinder 5, and ensure the uniform falling of the backfill material through the control assembly 4;

[0052] S4: The telescopic member 42 continues to move downward. The telescopic member 42 pushes the extrusion block 53 to drive the discharge assembly 55 to unfold, and make the backfill material evenly fill the inside of the karst cave through the rotation of the telescopic member 42;

[0053] S5: After the backfill is completed, compact the backfill material inside the karst cave through the compaction device to ensure the stability and safety of the backfill area.

[0054] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention.

Claims

1. A concealed cave backfill construction device, used for uniform backfilling of the interior of a concealed cave, comprising a device support plate (1), wherein the device support plate (1) is placed at a drilled hole above the concealed cave, and the device support plate (1) is placed above the concealed cave via a fixing seat (11), characterized in that: A feed cylinder (2) is arranged at the center of the equipment support plate (1), the feed cylinder (2) is coaxial with the borehole above the hidden cave, and a feed hopper (21) is arranged above the feed cylinder (2), the feed hopper (21) is a conical structure that is wide at the top and narrow at the bottom; A support frame (22) is provided in the middle of the feed cylinder (2), a control assembly (4) is connected below the support frame (22), a connecting cylinder (3) is coaxially provided below the feed cylinder (2), a discharging cylinder (5) is coaxially provided below the connecting cylinder (3), a through hole is provided below the discharging cylinder (5), a fixing frame (51) is provided below the discharging cylinder, a compression spring (52) is provided at the center of the fixing frame (51), an extrusion block (53) is connected at one end of the compression spring (52) away from the fixing frame (51), and the extrusion block (53) is connected to the control assembly (4), and a discharging assembly (55) is provided on the circumferential surface of the extrusion block (53); The control component (4) drives the discharge barrel (5) to move toward the depth of the hidden cave, and the discharge barrel (5) drives the connecting barrel (3) to move synchronously. The control component (4) continuously drives the discharge barrel (5) to move toward the depth of the hidden cave, and the control component (4) pushes the extrusion block (53) so that the compression spring (52) is extruded, thereby causing the discharge component (55) to change from a contracted state to an expanded state.

2. A concealed cave backfill construction device according to claim 1, characterized in that: The contact portion between the connecting cylinder (3) and the feeding cylinder (2) is a stepped structure, and a connecting spring (31) is provided at the contact portion. The contact portion between the connecting cylinder (3) and the discharging cylinder (5) is the same stepped structure.

3. A concealed cave backfill construction device according to claim 2, characterized in that: The connecting cylinder (3) and the discharging cylinder (5) are conical structures (5531) with a larger upper end and a smaller lower end, and conical inclined surfaces (32) are provided at the contact positions between the connecting cylinder (3) and the feeding cylinder (2) and between the connecting cylinder (3) and the discharging cylinder (5).

4. A concealed cave backfill construction device according to claim 1, characterized in that: The control assembly (4) comprises a control motor (41), a telescopic member (42), a rotating cylinder (43), a telescopic cylinder (44) and an ejection cylinder (45); the control motor (41) is vertically arranged below the support frame (22); the output end of the control motor (41) is connected to the telescopic member (42); a rotating cylinder (43) is arranged outside the control motor (41); the rotating cylinder (43) is rotatably arranged below the support frame (22); a moving groove (433) is opened inside the rotating cylinder (43); The telescopic cylinder (44) is coaxially arranged with the rotating cylinder (43), and one end of the telescopic cylinder (44) is in contact with the movable groove (433) of the rotating cylinder (43); a movable groove (433) consistent with the rotating cylinder (43) is provided on the inner side of the telescopic cylinder (44); the discharging cylinder (5) is coaxially arranged with the telescopic cylinder (44), and one end of the discharging cylinder (5) is in contact with the movable groove (433) provided in the telescopic cylinder (44); and the end of the telescopic member (42) away from the control motor (41) is in contact with the bottom end of the ejecting cylinder (45).

5. A concealed cave backfill construction device according to claim 4, characterized in that: The outer circumferential surfaces of the rotating cylinder (43), the telescopic cylinder (44) and the ejecting cylinder (45) are provided with spiral protrusions (431), and the support of the spiral protrusions (431) provided on the rotating cylinder (43), the telescopic cylinder (44) and the ejecting cylinder (45) is reduced in sequence, and the spiral protrusions (431) are of a trapezoidal structure (432), and the side of the spiral protrusions (431) that is in contact with the rotating cylinder (43), the telescopic cylinder (44) and the ejecting cylinder (45) is the long side.

6. A concealed cave backfill construction device according to claim 4, characterized in that: The bottom end of the ejection tube (45) is provided with a cross protrusion (421), and the end of the extrusion block (53) in contact with the ejection tube (45) is provided with a corresponding cross groove (531).

7. A concealed cave backfill construction device according to claim 6, characterized in that: The discharge assembly (55) includes a push rod (551), a connecting rod (552) and a discharge pipe (553). The push rod (551) is rotatably mounted on the circumferential surface of the extrusion block (53), and a plurality of push rods (551) are provided. A connecting rod (552) is installed at one end of the push rod (551) away from the extrusion block (53), and a discharge pipe (553) is installed at the other end of the connecting rod (552). The discharge pipe (553) is arranged in a fixed groove (54) provided on the discharge barrel (5), and the end of the discharge pipe (553) away from the connecting rod (552) is a conical structure. The number of the push rods (551), the connecting rods (552) and the discharge pipes (553) is the same.

8. A concealed cave backfill construction device according to claim 7, characterized in that: A movement cavity (541) is provided above the fixed groove (54), and a plurality of fixed springs (555) are provided at the bottom of the movement cavity (541); the other end of the fixed spring (555) is connected to a telescopic baffle (554); and an arc-shaped notch that fits each other is provided at the contact position between the telescopic baffle (554) and the discharge pipe (553).

9. A concealed cave backfill construction device according to claim 8, characterized in that: The supporting frame (22) and the fixing frame (51) are both structures with a narrow upper end and a wide lower end, and a circulation groove for circulating backfill material is provided in the middle of the supporting frame (22) and the fixing frame (51).

10. A method for backfilling a concealed karst cave, the method using a concealed karst cave backfilling construction device according to any one of claims 1 to 9, characterized in that: The method of use comprises the following steps: S1: First, the scope, depth and structure of the cave are detected by geological radar, and the impact of the cave on the building or the surrounding environment is analyzed. After the location of the cave is determined, holes are drilled at the bottom of the cave, and the debris inside the cave is cleaned after drilling; S2: The equipment support plate (1) is placed on the top of the cave through the fixing seat (11), and the control motor (41) is started. The control motor (41) drives the telescopic member (42) to extend into the depth of the cave, and the telescopic member (42) drives the feed cylinder (2), the connecting cylinder (3) and the discharge cylinder (5) to move into the interior of the cave; S3: The telescopic member (42) drives the discharge barrel (5) to move to a designated position, and the backfill material is added to the feed hopper (21). The backfill material in the feed hopper (21) flows downward along the inner walls of the feed barrel (2), the connecting barrel (3) and the discharge barrel (5), and the control component (4) ensures that the backfill material falls evenly. S4: the telescopic member (42) continues to move downward, the telescopic member (42) pushes the extrusion block (53) to drive the discharge assembly (55) to expand, and the backfill material is evenly filled into the cave through the rotation of the telescopic member (42); S5: After the backfilling is completed, the backfilling material inside the cave is compacted by a compacting device.

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