Jacking device for karst cave pile foundation pouring and leakage-proof structure

Abstract

The invention discloses a jacking device for karst cave pile foundation pouring and a leakage-proof structure, and relates to the technical field of pile foundation pouring, the jacking device comprises a shell, a push block, a first elastic assembly, a jacking rod, a second elastic assembly, a first locking assembly and a second locking assembly; the push block is arranged in the shell; the first elastic assembly is in transmission connection with the push block; the ejector rod is inserted into the shell; the second elastic component is in transmission connection with the ejector rod; the first locking assembly is connected with the push block, and when the first locking assembly is in a locking state, the push block can be prevented from moving; the second locking assembly is connected with the ejector rod, and when the second locking assembly is in the locking state, the ejector rod can be prevented from moving. According to the jacking device for pouring of the karst cave pile foundation and the leakage-proof structure, the karst cave plugging plate can be supported under the condition of lack of power, and pile foundation pouring is completed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pile foundation pouring, and in particular relates to a jacking device for karst cave pile foundation pouring and a leakage-proof structure. BACKGROUND

[0002] In engineering construction, it is necessary to drive pile foundations into the ground, for example, in bridge construction. In some special geographical environments, after pile holes are excavated, karst caves may be encountered. At this time, the boundary of the karst cave happens to intersect with the pile hole, resulting in the flow of concrete into the karst cave when pouring concrete to form a pile foundation. In the above-mentioned case, the concrete will first fill the karst cave, and then fill the pile hole to form a pile foundation, which will waste a large amount of concrete.

[0003] In related technologies, there are also hydraulic support devices, for example, in the file with publication number CN212506236U, an electric hydraulic rod is used to support an arc-shaped protective steel plate, which covers the entrance of the karst cave to prevent concrete from entering the karst cave. However, in some construction environments, it is difficult to transport energy supply equipment and power equipment, and the electric hydraulic rod cannot be driven in a power-free environment and is easily affected by the environment. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a jacking device for karst cave pile foundation pouring, which can support a karst cave sealing plate in the absence of power and complete pile foundation pouring.

[0005] The present application also proposes a leakage-proof structure for karst cave pile foundation pouring.

[0006] According to the jacking device for karst cave pile foundation pouring according to the first aspect of the present application, the jacking device comprises a housing; a push block, which is arranged inside the housing; a first elastic component, which is in transmission connection with the push block; a jacking rod, which is inserted into the housing; a second elastic component, which is in transmission connection with the jacking rod; a first locking component, which is connected with the push block, and can prevent the push block from moving when the first locking component is in a locked state; a second locking component, which is connected with the jacking rod, and can prevent the jacking rod from moving when the second locking component is in a locked state; The jacking device has an initial state, a jacking state and a recovery state, in the initial state, the first elastic component and the second elastic component are configured as energy storage states, the first locking component and the second locking component are configured as locking states, in the jacking state, the second locking component is configured as an unlocking state, the second elastic component drives the jacking rod to extend to the outside of the shell, in the recovery state, the first locking component is configured as an unlocking state, the first elastic component drives the push block to move to abut against the jacking rod and move the jacking rod towards the inside of the shell.

[0007] The jacking device for karst cave pile foundation pouring has at least the following beneficial effects: the jacking device is lowered to the plugging plate in the pile hole, the second locking component is acted on, the second elastic component drives the jacking rod to extend to the outside of the shell, one end of the jacking rod abuts against the plugging plate, and the other end of the shell away from the jacking rod abuts against the inner wall of the pile hole, so that the support and fixation of the plugging plate are completed; when the concrete is poured to a certain depth to immerse the plugging plate, the first locking component is acted on, the first elastic component drives the push block to move to abut against the jacking rod and move the jacking rod towards the inside of the shell, so that the jacking rod no longer supports the plugging plate, and the jacking device can be lifted and recovered at this time, the jacking device is a pure mechanical structure, can support the karst cave plugging plate in the absence of external power, and completes the pile foundation pouring.

[0008] According to some embodiments of the present application, the inside of the shell is provided with a first guide cavity and a second guide cavity which are parallel to each other, the push block is arranged in the first guide cavity, and the jacking rod is inserted into the second guide cavity, the jacking rod is provided with a stop block which extends to the first guide cavity, in the jacking state, the second elastic component drives the jacking rod to move towards a first direction, and in the recovery state, the first elastic component drives the push block to move towards a second direction, the first direction being opposite to the second direction.

[0009] According to some embodiments of the present application, the first elastic component is a first spring, the second elastic component is a second spring, the shell has opposite first and second ends, the first spring is arranged in the first guide cavity and located at the first end, one end of the first spring is fixed to the shell, and the other end of the first spring is fixed to the push block, the second spring is arranged in the second guide cavity and located at the second end, one end of the second spring is fixed to the shell, and the other end of the second spring is fixed to the jacking rod, and in the initial state, the first spring and the second spring are configured as compressed states.

[0010] According to some embodiments of the present application, the second locking assembly comprises a second clamping groove, a second limiting hole and a second clamping block, the second clamping groove is arranged on the side wall of the top rod, the second limiting hole is arranged on the shell and penetrates to the second guide cavity, in the locked state, the second clamping block passes through the second limiting hole and is clamped in the second clamping groove.

[0011] According to some embodiments of the present application, the second locking assembly further comprises a third spring, one end of the third spring is connected with the shell, the other end of the third spring is connected with the second clamping block, and the third spring is configured to drive the second clamping block to keep a tendency of moving towards the second clamping groove.

[0012] According to some embodiments of the present application, the first locking assembly comprises a first clamping groove, a first limiting hole and a first clamping block, the first clamping groove is arranged on the side wall of the push block, the first limiting hole is arranged on the shell and penetrates to the first guide cavity, in the locked state, the first clamping block passes through the first limiting hole and is clamped in the first clamping groove.

[0013] According to some embodiments of the present application, the side wall of the first clamping block is provided with an anti-disengagement groove, the protruding end of the top rod is provided with an insertion rod, in the initial state, the insertion rod is inserted into the anti-disengagement groove to prevent the first clamping block from moving, and in the jacking state, the insertion rod is disengaged from the anti-disengagement groove.

[0014] According to some embodiments of the present application, the protruding end of the top rod is provided with a pressing plate, and the side surface of the pressing plate away from the top rod is provided with a plurality of protruding pressing blocks.

[0015] According to some embodiments of the present application, the side of the outer side of the shell away from the protruding end of the top rod is provided with a top plate, and the top plate is provided with an arc-shaped surface.

[0016] The leakage-proof structure for karst cave pile foundation pouring according to the second aspect of the embodiments of the present application comprises a cylindrical metal cage, a plugging plate and the jacking device for karst cave pile foundation pouring described above, the metal cage is used to be placed in a pile hole, the plugging plate is placed in the pile hole and used to cover a karst cave opening in the pile hole, one end of the jacking device abuts against the plugging plate, and the other end of the jacking device abuts against the metal cage.

[0017] According to the leak-proof structure for karst cave pile foundation pouring of the embodiment of the present application, at least the following beneficial effects are achieved: the jacking device is lowered to the blocking plate in the pile hole, the second locking assembly is actuated, the second elastic assembly drives the jacking rod to extend to the outside of the housing, one end of the jacking rod abuts against the blocking plate, and the end of the housing away from the jacking rod abuts against the metal cage in the pile hole, thereby completing the support and fixation of the blocking plate; when the concrete is poured to a certain depth to immerse the blocking plate, the first locking assembly is actuated, the first elastic assembly drives the push block to move to abut against the jacking rod, and the jacking rod is moved to shrink towards the inside of the housing, so that the jacking rod no longer supports the blocking plate, at this time, the jacking device can be lifted and recycled, the jacking device is a pure mechanical structure, can support the karst cave blocking plate in the absence of external power, complete the pile foundation pouring, the blocking plate covers the karst cave opening, and as much as possible avoids the concrete from entering the karst cave, thereby greatly reducing unnecessary waste.

[0018] Additional aspects and advantages of the present application will be made apparent by the following description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described below in conjunction with the accompanying drawings and embodiments, in which: Figure 1 It is a schematic view of the jacking device for karst cave pile foundation pouring of the embodiment of the present application; Figure 2 It is a sectional view of the jacking device for karst cave pile foundation pouring of the embodiment of the present application; Figure 3 It is a partial sectional view at the second locking assembly of the embodiment of the present application; Figure 4 It is a partial sectional view at the first locking assembly of the embodiment of the present application; Figure 5 It is a schematic view of the leak-proof structure for karst cave pile foundation pouring of the embodiment of the present application.

[0020] LIST OF ELEMENTS Housing 100, first guide cavity 110, second guide cavity 120, push block 200, first elastic assembly 300, jacking rod 400, stop block 410, insertion rod 420, pressing plate 430, pressing block 431, top plate 440, second elastic assembly 500, first locking assembly 600, first clamping groove 610, first limiting hole 620, first clamping block 630, anti-dropping groove 631, second locking assembly 700, second clamping groove 710, second limiting hole 720, second clamping block 730, third spring 740, metal cage 800, blocking plate 900. DETAILED DESCRIPTION

[0021] Embodiments of the present application are described below in the accompanying drawings, of which examples are shown, wherein identical or similar reference numerals represent identical or similar elements or elements having identical or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, for the purpose of explaining the present application, and should not be understood as a limitation of the present application.

[0022] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, etc. is based on the orientation or position relationship shown in the drawings, only for the purpose of facilitating the description of the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0023] In the description of the present application, the plural refers to more than two. If there is a description of the first, second, only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the sequence of technical features indicated.

[0024] In the description of the present application, unless otherwise explicitly limited, the words such as setting, mounting, connecting, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0025] As described in the background, part of the construction environment is limited and cannot use external power equipment, in order to support the sealing plate to block the cave entrance in the pile hole in the non-powered environment, a pure mechanical structure of the jacking device needs to be developed.

[0026] Referring to Figure 1 and Figure 2 The jacking device for cave pile pouring of an embodiment of the present application comprises a shell 100, a push block 200, a first elastic assembly 300, a top rod 400, a second elastic assembly 500, a first locking assembly 600, and a second locking assembly 700.

[0027] The push block 200 is arranged in the inside of the shell 100; the first elastic assembly 300 is in transmission connection with the push block 200; the jacking rod 400 is inserted into the shell 100; the second elastic assembly 500 is in transmission connection with the jacking rod 400; the first locking assembly 600 is connected with the push block 200, and the first locking assembly 600 can prevent the push block 200 from moving when being in the locking state; the second locking assembly 700 is connected with the jacking rod 400, and the second locking assembly 700 can prevent the jacking rod 400 from moving when being in the locking state; wherein the jacking device has an initial state, a jacking state and a recovery state, in the initial state, the first elastic assembly 300 and the second elastic assembly 500 are configured to be in the energy storage state, and the first locking assembly 600 and the second locking assembly 700 are configured to be in the locking state, in the jacking state, the second locking assembly 700 is configured to be in the unlocking state, and the second elastic assembly 500 drives the jacking rod 400 to extend to the outside of the shell 100, in the recovery state, the first locking assembly 600 is configured to be in the unlocking state, and the first elastic assembly 300 drives the push block 200 to move to abut against the jacking rod 400, and moves the jacking rod 400 to the inside of the shell 100.

[0028] When the jacking device for the solution cavity pile foundation pouring of the embodiment is used, the jacking device is in the initial state, that is, the jacking rod 400 is in the state of not extending. First, the necessary components for pouring the pile hole are placed in the pile hole, such as a metal cage and a blocking plate, and the position of the blocking plate is adjusted so that the blocking plate completely covers the solution cavity opening in the pile hole. Then, the jacking device is lowered to the position of the blocking plate. It should be understood that the jacking device can be hung by a chain or a steel rope to the position of the blocking plate, specifically, a plurality of lifting lugs can be arranged on the outer surface of the shell 100, so as to facilitate the connection of the chain or the steel rope with the lifting lugs.

[0029] After the jacking device is placed at the position of the blocking plate, the second locking assembly 700 is actuated, that is, the jacking device is adjusted to the jacking state, at this time, the second locking assembly 700 is in the unlocking state, at this time, the jacking rod 400 is no longer limited by the second locking assembly 700, the second elastic assembly 500 is no longer maintained in the energy storage state, and the second elastic assembly 500 can drive the jacking rod 400 to move to extend to the outside of the shell 100, until the jacking rod 400 contacts and abuts against the blocking plate, at the same time, the end of the shell 100 away from the jacking rod 400 also abuts against the inner wall of the pile hole, so as to fix the blocking plate.

[0030] After the blocking plate is fixed, the pile hole can be poured with concrete. When the concrete in the pile hole is poured to the position of the blocking plate, and the concrete immerses the blocking plate to the predetermined height, the concrete can fix the blocking plate, at this time, the first locking assembly 600 is actuated, the jacking device is adjusted to the recovery state, at this time, the first locking assembly 600 is in the unlocked state, the push block 200 is no longer limited by the first locking assembly 600, the first elastic assembly 300 is no longer maintained in the energy storage state, the first elastic assembly 300 can drive the push block 200 to move and abut against the jack rod 400, and the jack rod 400 is moved to shrink towards the inside of the shell 100, that is, the jack rod 400 no longer supports the blocking plate, and the jacking device can be lifted and recovered.

[0031] It needs to be understood that the first elastic assembly 300 and the second elastic assembly 500 are in the energy storage state, and an external force is needed to maintain the energy storage state, for example, the first locking assembly 600 limits the movement of the push block 200, so that the first elastic assembly 300 cannot release energy to drive the push block 200. Specifically, taking a spring as an example, when the spring is in a compressed state or a stretched state, it is in an energy storage state and has a tendency to return to the default state.

[0032] It can be understood that the inside of the shell 100 is provided with the first guide cavity 110 and the second guide cavity 120 which are parallel to each other, the push block 200 is arranged in the first guide cavity 110, the jack rod 400 is inserted into the second guide cavity 120, the jack rod 400 is provided with the stop block 410 which extends to the first guide cavity 110, in the jacking state, the second elastic assembly 500 drives the jack rod 400 to move towards the first direction, in the recovery state, the first elastic assembly 300 drives the push block 200 to move towards the second direction, and the first direction is opposite to the second direction.

[0033] The first guide cavity 110 not only plays a role of containing the push block 200, but also plays a role of guiding the movement of the push block 200. Similarly, the second guide cavity 120 not only plays a role of containing the jack rod 400, but also plays a role of guiding the movement of the jack rod 400.

[0034] The top rod 400 and the block 410 can be an integral structure, or can be two components assembled and fixed, for example, welded. Regardless of the way the block 410 is arranged, the block 410 can be regarded as a part of the top rod 400. The block 410 extends to the first guide cavity 110, that is, the block 410 is in the moving path of the push block 200. The first direction and the second direction are opposite, that is, the moving directions of the block 410 and the push block 200 are opposite. In the jacking state, the top rod 400 moves towards the first direction, and the block 410 will move towards the push block 200 to be close to the push block 200. In the recycling state, the push block 200 moves towards the second direction, and the push block 200 will abut against the block 410 and push the block 410 to move towards the second direction, thereby completing the recycling of the top rod 400.

[0035] It can be understood that the first elastic component 300 is a first spring, the second elastic component 500 is a second spring, the shell 100 has opposite first and second ends, the first spring is arranged in the first guide cavity 110 and located at the first end, one end of the first spring is fixed to the shell 100, and the other end of the first spring is fixed to the push block 200. The second spring is arranged in the second guide cavity 120 and located at the second end, one end of the second spring is fixed to the shell 100, and the other end of the second spring is fixed to the top rod 400. In the initial state, the first spring and the second spring are both configured in a compressed state.

[0036] The first spring and the second spring are in completely opposite positions, and when the compressed first spring and the compressed second spring reset, the push block 200 and the top rod 400 can be respectively driven to move in opposite directions. Specifically, when the second locking component 700 is in the unlocked state, the movement of the top rod 400 is not limited by the second locking component 700, and the compressed second spring resets, that is, the second spring pushes the top rod 400 to move from the second end towards the first end, defined as moving towards the first direction, and the jacking device is in the jacking state. When the first locking component 600 is in the unlocked state, the movement of the push block 200 is not limited by the first locking component 600, and the compressed first spring resets, that is, the first spring pushes the push block 200 to move from the first end towards the second end, defined as moving towards the second direction, and the jacking device is in the recycling state. The push block 200 will abut against the block 410 and push the block 410 to move towards the second direction, thereby recycling the top rod 400 towards the inside of the shell 100.

[0037] It should be understood that the second spring can also be arranged in a stretched state, and is also configured in an energy storage state. When the second spring is arranged in a stretched state, the second spring should also be arranged at the first end of the shell 100, one end of the second spring is connected to the shell 100, and the other end of the second spring is connected to the side close to the second end of the top rod 400 after stretching. At this time, the second spring will pull the top rod 400 to move from the second end towards the first end when resetting.

[0038] Referring to Figure 3 As shown in FIG. 7, it can be understood that the second locking assembly 700 comprises a second clamping groove 710, a second limiting hole 720 and a second clamping block 730. The second clamping groove 710 is arranged on the side wall of the top rod 400. The second limiting hole 720 is arranged on the shell 100 and penetrates through the second guide cavity 120. In the locked state, the second clamping block 730 penetrates through the second limiting hole 720 and is clamped in the second clamping groove 710.

[0039] On the one hand, the second clamping block 730 is in contact with the second clamping groove 710. On the other hand, the second clamping block 730 is in contact with the second limiting hole 720 which is fixed on the shell 100. The second clamping block 730 is limited by the second limiting hole 720. The top rod 400 is limited by the second clamping block 730. Therefore, the top rod 400 cannot move. When the second clamping block 730 is clamped in the second clamping groove 710, the second locking assembly 700 is in the locked state.

[0040] When the second clamping block 730 moves out of the second clamping groove 710, the top rod 400 is no longer limited by the second clamping block 730. The second locking assembly 700 is in the unlocked state. It should be understood that in order to facilitate the movement of the second clamping block 730 out of the second clamping groove 710, a traction rope can be arranged on the second clamping block 730. The operator can pull the traction rope outside the pile hole to move the second clamping block 730 out of the second clamping groove 710.

[0041] It can be understood that the second locking assembly 700 further comprises a third spring 740. One end of the third spring 740 is connected with the shell 100. The other end of the third spring 740 is connected with the second clamping block 730. The third spring 740 is configured to drive the second clamping block 730 to keep the tendency of moving towards the second clamping groove 710.

[0042] Because the third spring 740 exerts a force on the second clamping block 730, the second clamping block 730 has the tendency of moving towards the second clamping groove 710. Therefore, the jacking device will not be mistakenly triggered to the jacking state when it is placed. It should be understood that since the movement of the second clamping block 730 needs to overcome the elastic force of the third spring 740, the shell 100 will be lifted when the traction rope of the second clamping block 730 is pulled. At this time, a rigid support rod can be used. The support rod is inserted into the pile hole until it contacts the shell 100. The support rod is used to prevent the shell 100 from being lifted. The traction rope of the second clamping block 730 is pulled to move the second clamping block 730 out of the second clamping groove 710. The jacking device is triggered to the jacking state.

[0043] Referring to Figure 4As shown, it can be understood that the first locking assembly 600 comprises a first clamping groove 610, a first limiting hole 620 and a first clamping block 630. The first clamping groove 610 is arranged on the side wall of the push block 200. The first limiting hole 620 is arranged on the shell 100 and penetrates the first guide cavity 110. In the locked state, the first clamping block 630 penetrates the first limiting hole 620 and is clamped in the first clamping groove 610.

[0044] Similar to the second locking assembly 700, on the one hand, the first clamping block 630 is in contact with the first clamping groove 610, and on the other hand, the first clamping block 630 is in contact with the first limiting hole 620 fixed on the shell 100. The first clamping block 630 is limited by the first limiting hole 620, and the push block 200 is limited by the first clamping block 630. Therefore, the push block 200 cannot move. When the first clamping block 630 is clamped in the first clamping groove 610, the first locking assembly 600 is in the locked state.

[0045] When the first clamping block 630 moves out of the first clamping groove 610, the push block 200 is no longer limited by the first clamping block 630, and the first locking assembly 600 is in the unlocked state. Similarly, in order to facilitate the movement of the first clamping block 630 out of the first clamping groove 610, a pulling rope can also be arranged on the first clamping block 630. The operator can pull the pulling rope on the first clamping block 630 outside the pile hole to move the first clamping block 630 out of the first clamping groove 610.

[0046] Referring to Figure 5 As shown, it can be understood that the side wall of the first clamping block 630 is provided with an anti-falling groove 631, and the extending end of the jacking rod 400 is provided with an insertion rod 420. In the initial state, the insertion rod 420 is inserted into the anti-falling groove 631 to prevent the first clamping block 630 from moving. In the jacking state, the insertion rod 420 is separated from the anti-falling groove 631.

[0047] In order to prevent the first clamping block 630 from being moved out of the first clamping groove 610 due to touching the first clamping block 630 and adjusting the jacking device to the recovery state in advance, causing the jacking rod 400 to be unable to extend out of the shell 100, the insertion rod 420 and the anti-falling groove 631 are used to prevent the first clamping block 630 from moving out of the first clamping groove 610. It should be understood that the insertion rod 420 is arranged at the extending end of the jacking rod 400. In the initial state, the jacking rod 400 does not extend out of the shell 100, and the insertion rod 420 is inserted into the anti-falling groove 631. Only in the jacking state, the jacking rod 400 extends out of the shell 100, that is, the insertion rod 420 moves away from the first clamping block 630 with the jacking rod 400, and the insertion rod 420 leaves the anti-falling groove 631. At this time, the first clamping block 630 can be moved to unlock the push block 200, and the jacking device can be switched to the recovery state.

[0048] It can be understood that the extending end of the jacking rod 400 is provided with a pressing plate 430, and the side surface of the pressing plate 430 away from the jacking rod 400 is provided with a plurality of protruding pressing blocks 431.

[0049] The extending end of the jacking rod 400 is generally used to contact and support the blocking plate, and the blocking plate is usually arranged outside the metal cage, and the jacking device is hung from the inside of the metal cage to the position of the blocking plate, therefore, in order to have good contact between the extending end of the jacking rod 400 and the blocking plate, a pressing plate 430 is arranged at the extending end of the jacking rod 400, and a plurality of protruding pressing blocks 431 are arranged on the surface of the pressing plate 430, and the pressing blocks 431 can pass through the mesh of the metal cage and contact the blocking plate.

[0050] It can be understood that the outer side of the shell 100 away from the extending end of the jacking rod 400 is provided with a top plate 440, and the top plate 440 is provided with an arc-shaped surface.

[0051] When the jacking rod 400 abuts against the support blocking plate, the side of the shell 100 away from the extending end of the jacking rod 400 also abuts against the inner wall of the metal cage. The top plate 440 is arranged on the outer side of the shell 100, and the top plate 440 is provided with an arc-shaped surface, which can improve the contact surface between the top plate 440 and the metal cage, and further improve the support stability of the jacking device.

[0052] The anti-leakage structure for karst cave pile foundation pouring in an embodiment of the present application comprises a cylindrical metal cage 800, a blocking plate 900 and the above-mentioned jacking device for karst cave pile foundation pouring, the metal cage 800 is used to be placed in the pile hole, the blocking plate 900 is placed in the pile hole and used to cover the karst cave opening in the pile hole, one end of the jacking device abuts against the blocking plate 900, and the other end of the jacking device abuts against the metal cage 800.

[0053] Firstly, the pile hole is excavated, and when the pile hole intersects with the karst cave, the inner wall surface of the pile hole will have the opening of the karst cave. The blocking plate 900 is hung into the pile hole and covers the opening of the karst cave. It should be understood that the blocking plate 900 should be slightly larger than the size of the opening of the karst cave, and the blocking plate 900 can be provided with an arc-shaped structure to match the arc shape of the pile hole, so that the sealing of the karst cave is better. Preferably, a plurality of lifting lugs are arranged at the upper end of the blocking plate 900, so as to facilitate lifting. After the blocking plate 900 is placed in position, the lifting state is maintained, and then the metal cage 800 is placed in the pile hole. It should be understood that the metal cage 800 is usually a steel reinforcement cage.

[0054] Then the jacking device in the initial state is hung into the pile hole, when the jacking device is at the position of the blocking plate 900, the second locking assembly 700 is operated, the second locking assembly 700 releases the restriction on the jacking rod 400, the second elastic assembly 500 drives the jacking rod 400 to extend outwardly from the outer side of the shell 100, and abuts against the blocking plate 900, the other side of the shell 100 abuts against the metal cage 800, and the support of the blocking plate 900 is completed, at this time, the lifting of the blocking plate 900 can be unloaded. The blocking plate 900 is supported by the jacking device and completely sealed to the opening of the karst cave, and concrete pouring can be carried out towards the inside of the pile hole.

[0055] After the concrete immersion sealing plate 900 is immersed to a certain height, the first locking assembly 600 can be operated to release the restriction on the push block 200, the first elastic assembly 300 drives the push block 200 to move and abut against the jacking rod 400, the jacking rod 400 is moved and retracted towards the inside of the shell 100, the jacking device releases the support on the sealing plate 900, and the jacking device can be lifted and recycled.

[0056] It should be understood that the jacking device in the recycling state can apply an external force to the jacking rod 400, so that the jacking rod 400 moves towards the outside of the shell 100. Since the push block 200 is in contact with the jacking rod 400 at this time, the movement of the jacking rod 400 towards the outside of the shell 100 is opposite to the direction of the movement of the push block 200 driven by the first elastic assembly 300. The jacking rod 400 will drive the push block 200 to move to overcome the driving force of the first elastic assembly 300, so as to reconfigure the first elastic assembly 300 to the energy storage state, and then operate the first locking assembly 600 to be in the locked state again to restrict the movement of the push block 200. Then, the external force is applied to the jacking rod 400 again, so that the jacking rod 400 moves towards the inside of the shell 100 to retract. At this time, the movement direction of the jacking rod 400 is opposite to the movement direction of the jacking rod 400 driven by the second elastic assembly 500, so as to overcome the driving force of the second elastic assembly 500, reconfigure the second elastic assembly 500 to the energy storage state, and then operate the second locking assembly 700 to be in the locked state again to restrict the movement of the jacking rod 400. At this time, the jacking device is reset to the initial state.

[0057] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the purpose of the present application.

Claims

1. A jacking device for use in the pouring of a cave pile foundation, characterized in that, The utility model relates to a jacking device, including: a shell; a push block arranged in the interior of the shell; a first elastic component in transmission connection with the push block; a top rod inserted into the shell; a second elastic component in transmission connection with the top rod; a first locking component connected with the push block, which can prevent the push block from moving when in the locked state; a second locking component connected with the top rod, which can prevent the top rod from moving when in the locked state; wherein the jacking device has an initial state, a jacking state and a recovery state, in the initial state, the first elastic component and the second elastic component are both configured as energy storage states, and the first locking component and the second locking component are both configured as locked states, in the jacking state, the second locking component is configured as an unlocked state, and the second elastic component drives the top rod to extend to the outside of the shell, in the recovery state, the first locking component is configured as an unlocked state, and the first elastic component drives the push block to move and abut against the top rod, and moves the top rod towards the inside of the shell.

2. The jacking device for the solution cavity pile foundation pouring according to claim 1, characterized in that, The interior of the shell is provided with a first guide cavity and a second guide cavity parallel to each other, the push block is arranged in the first guide cavity, the top rod is inserted into the second guide cavity, the top rod is provided with a stop block, the stop block extends to the first guide cavity, in the jacking state, the second elastic component drives the top rod to move towards a first direction, in the recovery state, the first elastic component drives the push block to move towards a second direction, and the first direction is opposite to the second direction.

3. The jacking device for the solution cavity pile foundation pouring according to claim 2, characterized in that, The first elastic component is a first spring, the second elastic component is a second spring, the shell has opposite first and second ends, the first spring is arranged in the first guide cavity and located at the first end, one end of the first spring is fixed to the shell, and the other end of the first spring is fixed to the push block, the second spring is arranged in the second guide cavity and located at the second end, one end of the second spring is fixed to the shell, and the other end of the second spring is fixed to the top rod, and in the initial state, the first spring and the second spring are both configured as compressed states.

4. The jacking device for the solution cavity pile foundation pouring according to claim 2, characterized in that, The second locking component includes a second clamping groove, a second limiting hole and a second clamping block, the second clamping groove is arranged on the side wall of the top rod, the second limiting hole is arranged on the shell and penetrates to the second guide cavity, in the locked state, the second clamping block passes through the second limiting hole and is clamped in the second clamping groove.

5. The jacking device for the grouting of a cave pile according to claim 4, characterized in that, The second locking component further includes a third spring, one end of the third spring is connected with the shell, the other end of the third spring is connected with the second clamping block, and the third spring is configured to drive the second clamping block to keep moving towards the second clamping groove.

6. The jacking device for the grouting of a cave pile according to claim 2, characterized in that, The first locking assembly comprises a first clamping groove, a first limiting hole and a first clamping block. The first clamping groove is arranged on the side wall of the push block. The first limiting hole is arranged on the shell and penetrates the first guide cavity. In the locking state, the first clamping block passes through the first limiting hole and is clamped in the first clamping groove.

7. The jacking arrangement for the grouting of a cave pile foundation according to claim 6, characterized in that, A side wall of the first clamping block is provided with an anti-disengagement groove, and an extending end of the jacking rod is provided with an insertion rod. In the initial state, the insertion rod is inserted into the anti-disengagement groove to prevent the first clamping block from moving. In the jacking state, the insertion rod is disengaged from the anti-disengagement groove.

8. The jacking device for the grouting of a cave pile foundation according to claim 1, characterized in that, An extending end of the jacking rod is provided with a pressing plate. A side surface of the pressing plate away from the jacking rod is provided with a plurality of protruding pressing blocks.

9. The jacking device for the grouting of a cave pile foundation according to claim 1, characterized in that, A side of an outer side of the shell away from the extending end of the jacking rod is provided with a top plate. The top plate is provided with an arc-shaped surface.

10. A leak-proof structure for sink pile concreting, characterized in that, The device comprises a cylindrical metal cage, a sealing plate and a jacking device according to any one of claims 1 to 9. The metal cage is arranged in a pile hole. The sealing plate is arranged in the pile hole and covers a karst cave in the pile hole. One end of the jacking device is in abutment with the sealing plate, and the other end of the jacking device is in abutment with the metal cage.

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