Piling device for soft soil roadbed pipe pile construction

Abstract

The invention relates to the technical field of piling, in particular to a piling device for soft soil roadbed pipe pile construction, which comprises a supporting seat, a walking device is arranged at the bottom of the supporting seat, a first vertical frame and a second vertical frame are respectively arranged on two sides of the top of the supporting seat, and a bearing platform assembly is horizontally arranged between the first vertical frame and the second vertical frame. Oil cylinders are fixed to the tops of the first vertical frame and the second vertical frame correspondingly, the output ends of the oil cylinders are fixed to the two ends of the bearing platform assembly, a pile penetrating hole is formed in the middle of the supporting base, a supporting arm is connected to the side, close to the second vertical frame, of the first vertical frame, and a rotary supporting structure is arranged in the middle of the bearing platform assembly. The bottom of the rotary supporting structure is connected with a rotating force device used for driving the pipe pile synchronous oil cylinder to rotate. By means of the technical scheme, in the downward pressing process of the pipe pile, the pipe pile can be rapidly cut into a soft soil stratum along with synchronous rotating motion, the pile pressing time is greatly shortened, and the pile driving construction efficiency of the pipe pile is improved.

Description

Technical Field

[0001] The invention relates to the technical field of piling, and in particular to a piling device for soft soil roadbed pipe pile construction. Background Art

[0002] The application of pipe piles in soft soil roadbed is mainly reflected in its effective means of strengthening the foundation. Since soft soil roadbed has the characteristics of high natural water content, high compressibility and low strength, if roads are built directly on it, they will face problems such as stability and settlement;

[0003] Existing pipe piles are generally pressed into the external ground by means of a static pile driver. Through the action of the static pile driver, the pile can be effectively sent gradually into the external ground. The structure of the existing static pile driver includes a frame and a clamping device that can be raised and lowered and arranged on the frame. The pile is effectively clamped by the setting of the clamping device, and then the reciprocating action of the hydraulic rod above the frame is used to achieve the effect of the clamping device gradually pressing the pile into the external ground. For example, in the prior art, there is an invention patent with patent number 201920977650X, entitled A Pile Clamping Device of a Static Pile Driver, which discloses a method of setting a second through hole to achieve the effects of loosening and clamping, and the second through hole is composed of a plurality of adjustment plates, and the diameter of the second through hole is adjusted by adjusting the angle of the adjustment plate. Small adjustment, however, the above structure mainly presses the pipe pile into the ground with downward static pressure, resulting in large resistance to the downward pressure of the pipe pile and low efficiency. Therefore, a piling device for soft soil roadbed pipe pile construction is proposed, so that the pipe pile is accompanied by a synchronous rotational movement during the downward pressure process. The addition of rotational force enables the pipe pile to cut into the soft soil layer faster. Compared with the single static pressure method, the piling time can be greatly shortened. The rotational force causes the pipe pile to generate friction with the surrounding soil during the pressing process, which can enhance the friction between the pile body and the soil, thereby improving the bearing capacity and stability of the pile. Compared with the traditional piling method, the static pressure and rotation linkage structure reduces noise and vibration, has less impact on the surrounding environment, meets environmental protection requirements, and causes the pipe pile to generate friction with the surrounding soil during the pressing process, so as to greatly shorten the piling time and improve the piling construction efficiency of the pipe pile. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a piling device for pipe pile construction on soft soil roadbed, so that the pipe pile is accompanied by a synchronous rotational motion during the downward pressing process. The addition of the rotational force enables the pipe pile to cut into the soft soil layer faster, and compared with the single static pressure method, the piling time can be greatly shortened. The rotational force causes the pipe pile to generate friction with the surrounding soil during the pressing process, which can enhance the friction between the pile body and the soil, thereby improving the bearing capacity and stability of the pile. Compared with the traditional piling method, the static pressure and rotation linkage structure reduces noise and vibration, has less impact on the surrounding environment, and meets environmental protection requirements, so that the pipe pile generates friction with the surrounding soil during the pressing process, thereby greatly shortening the piling time and improving the piling construction efficiency of the pipe pile.

[0005] The technical solution adopted by the present invention to solve the technical problem is a piling device for soft soil roadbed pipe pile construction, comprising a support seat, a walking device is arranged at the bottom of the support seat, a first frame and a second frame are arranged on both sides of the top of the support seat, a cap assembly is arranged horizontally between the first frame and the second frame, oil cylinders are fixed on the top of the first frame and the second frame, the output end of the oil cylinder is fixed to the two ends of the cap assembly, and a pile hole is opened in the middle of the support seat;

[0006] It is characterized in that a support arm is connected to the side of the first frame close to the second frame, a rotating support structure is arranged in the middle of the base assembly, a rotating force device for driving the synchronous cylinder of the pipe pile to rotate is connected to the bottom of the rotating support structure, the rotating force device is connected to the support arm and the base assembly, and a locking structure for fixing the pipe pile is provided in the rotating support structure.

[0007] By adopting the above technical solution, when piling in soft soil, the first frame, the second frame and the upper cap assembly are supported by the support seat, the walking device drives the entire piling device to move to the roadbed position required for operation, the locking structure locks the pipe pile in the cap assembly, and the oil cylinder pushes down the cap assembly, so that the pipe pile presses down on the roadbed to achieve the piling operation;

[0008] With the rotation device in the cap assembly, the pipe pile is accompanied by synchronous rotation during the downward pressing process. The addition of rotational force enables the pipe pile to cut into the soft soil layer faster. Compared with the single static pressure method, the pile pressing time can be greatly shortened. The rotational force causes the pipe pile to generate friction with the surrounding soil during the pressing process. This friction can enhance the friction between the pile body and the soil, thereby improving the bearing capacity and stability of the pile.

[0009] Compared with traditional piling methods, the static pressure and rotation linkage structure reduces noise and vibration, has less impact on the surrounding environment, and meets environmental protection requirements.

[0010] Specifically, the support platform assembly includes a support platform arranged parallel to the support seat, and a supporting through hole coaxial with the pile hole is opened in the middle of the support platform, and side openings are symmetrically opened on both sides of the support platform away from the first frame and the second frame.

[0011] By adopting the above technical solution, the supporting through hole can be provided for penetrating downwardly through the bottom of the pipe pile, and the side opening can provide the locking structure with sufficient rotation space during the rotation of the rotational force device.

[0012] Specifically, the rotating support structure includes an upper bearing sleeve fixed to the top of the supporting through hole, a middle sleeve is arranged at the bottom of the upper bearing sleeve, a plurality of groups of rolling steel balls are embedded in the circumference of the middle sleeve at equal distances, a lower sleeve is arranged at the bottom of the middle sleeve and fixed to the inner wall of the supporting through hole, and a rotating sleeve coaxially arranged with the pile hole is connected to the bottom of the lower sleeve;

[0013] The rotating sleeve is symmetrically provided with telescopic holes on both sides, and the rotating sleeve is provided with a plurality of key pin holes at the bottom of the circumference;

[0014] The locking structure is fixed on the rotating sleeve, and the rotating force device is connected to the bottom of the rotating sleeve.

[0015] By adopting the above technical solution, the upper bearing sleeve, the middle sleeve, the rolling steel ball and the lower sleeve are matched to obtain a rotating support structure, so that the rotating sleeve is supported in the supporting through hole to perform rotational motion. The rotating support structure can greatly reduce the friction of the rotating sleeve during rotation, thereby improving the flexibility of the rotating sleeve to drive the locking structure to rotate.

[0016] Specifically, the locking structure includes a first inner oil cylinder and a second inner oil cylinder, and the first inner oil cylinder and the second inner oil cylinder are respectively arranged in side openings symmetrically opened on both sides of the platform;

[0017] The first inner oil cylinder and the second inner oil cylinder are symmetrically arranged on both sides of the rotating sleeve, and the sleeves of the first inner oil cylinder and the second inner oil cylinder are fixed to the rotating sleeve. Slips are symmetrically arranged on both sides of the rotating sleeve, and the output ends of the first inner oil cylinder and the second inner oil cylinder pass through the telescopic holes and are respectively connected to the slips at corresponding positions.

[0018] By adopting the above technical solution, the pipe piles passing through the supporting through holes are locked and fixed by the locking structure, so that the pipe piles can rotate with the rotary force device in the rotating sleeve, and the pipe piles can perform synchronous rotation during being pressed down. Especially when the soft soil has the characteristics of high water content, high compressibility, slow consolidation, etc., this piling method can more effectively improve the bearing capacity and stability of the foundation.

[0019] Specifically, the rotary force device includes a worm gear coaxially arranged with the pile hole, and the worm gear is sleeved at the bottom of the rotating sleeve, a key pin is arranged on the inner side of the worm gear, and the key pin is arranged in a key pin hole on a side away from the worm gear;

[0020] A worm is connected to one side of the worm wheel, and both ends of the worm wheel are rotatably connected to the support platform through bearings. The outer periphery of the shaft head at one end of the worm wheel is connected to the first gear, a second gear is meshed with one side of the first gear, and a third gear is meshed with the top of the second gear. The second gear and the third gear are fixedly connected to the support arm, and the bottom of the support arm passes through the support platform and is fixed to the support seat.

[0021] By adopting the above technical solution, through the rotational force device composed of a worm wheel, a worm and a first gear, a synchronous rotational force can be provided to the rotating support structure while the base assembly is pressed downward, and the power of the rotational force device completely depends on the pressure of the base assembly, thereby maintaining the synchronous linkage of the rotational force of the pressure box, and the diameter accuracy of the pipe pile during the period of advancing into the soil is better.

[0022] Specifically, the walking device includes two groups of symmetrically arranged crawler walkers, a base frame is connected between the two groups of crawler walkers, and a pile lowering opening coaxial with the pile penetration hole is opened through the middle of the base frame.

[0023] By adopting the above technical solution, the crawler walker is used to support the movement of the entire piling device, so that the piling device of the present application can move flexibly on the working surface.

[0024] Specifically, an oil tank is provided on one side of the top of the support seat away from the pile hole, and a generator and an oil pump station for generating electricity are respectively provided on both sides of the oil tank, and the oil circuit of the oil pump station is respectively connected to the oil cylinder, the first inner oil cylinder and the second inner oil cylinder.

[0025] By adopting the above technical solution, the generator provides power support for the overall piling equipment, the oil tank provides oil for the generator, and the oil pump station provides pressure support for the oil pressure part of the overall piling equipment.

[0026] Specifically, a distance sensor is arranged on the top of the oil tank, and the detection end of the distance sensor faces the support platform.

[0027] By adopting the above technical solution, the distance sensor detects the downward distance of the base assembly, further ensuring the downward progress of the pipe pile in the soil.

[0028] Specifically, several groups of counterweight blocks with rope threading slots at the bottom are arranged on the top of the support seat and on the outer layer of the first and second upright frames, and several groups of coaxial corresponding positioning rod holes are opened on the top of the support seat and the bottom of the counterweight blocks, and positioning rods are inserted into the positioning rod holes.

[0029] By adopting the above technical solution, the weight of the overall piling device is increased by the counterweight block to ensure the stability of the overall piling device in pressing down on the pipe pile, and with the help of the plug-in assembly method of the positioning rod and the positioning rod hole, the overall counterweight part has better disassembly and assembly flexibility.

[0030] The beneficial effects of the present invention are as follows: when piling soft soil, the first frame, the second frame and the upper bearing platform assembly are supported by the support seat, the walking device drives the entire piling device to move to the roadbed position required for operation, the locking structure locks the pipe pile in the bearing platform assembly, the oil cylinder pushes the bearing platform assembly downward, so that the pipe pile presses down on the roadbed to achieve the piling operation; accompanied by the rotation device in the bearing platform assembly, the pipe pile is accompanied by a synchronous rotation movement during the downward pressing process, and the addition of the rotation force enables the pipe pile to cut into the soft soil layer faster. Compared with the single static pressure method, the piling time can be greatly shortened, and the rotation force causes the pipe pile to generate friction with the surrounding soil during the pressing process. This friction effect It can enhance the friction between the pile body and the soil, thereby improving the bearing capacity and stability of the pile. The addition of rotational force helps the pipe pile to maintain verticality during the pressing process and reduce the deviation of the pile body. Especially when the pile driving speed is too fast, the rotational force can offset part of the horizontal deviation and reduce the proportion of horizontal deviation of the pile. Compared with the traditional piling method, the static pressure and rotation linkage structure reduces noise and vibration, has less impact on the surrounding environment, and meets environmental protection requirements. It makes the pipe pile generate friction with the surrounding soil during the pressing process, so as to greatly shorten the pile driving time and improve the pile driving construction efficiency of the pipe pile. At the same time, due to the improvement of construction efficiency, energy consumption and carbon emissions are also reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0032] Figure 1 It is an overall diagram of the present invention;

[0033] Figure 2 It is a schematic diagram of the support structure of the present invention;

[0034] Figure 3 It is a schematic diagram of the structure of the first stand and the second stand of the present invention;

[0035] Figure 4 It is a schematic diagram of the locking structure of the present invention;

[0036] Figure 5 It is a cross-sectional schematic diagram of the rotary support structure of the present invention;

[0037] Figure 6 It is a schematic diagram of the structure of the rotary force device of the present invention;

[0038] Figure 7 It is a schematic diagram of the structure of the walking device of the present invention;

[0039] Figure 8 Schematic diagram of the positioning rod of the present invention

[0040] In the figure: 1. support seat; 2. walking device; 201. chassis; 202. crawler walker; 203. pile opening; 3. first frame; 4. second frame; 5. base assembly; 501. base; 502. support through hole; 503. side opening; 6. pile hole; 7. rotating support structure; 701. rotating sleeve; 702. middle shaft sleeve; 703. rolling steel ball; 704. lower shaft sleeve; 705. upper bearing sleeve; 706. telescopic hole; 707. key pin hole; 8. rotary force device; 801. worm gear; 802. key pin; 803. worm; 804. first gear; 805. second gear; 806. third gear; 9. support arm; 11. oil cylinder; 12. oil tank; 13. generator; 14. oil pump station; 16. distance sensor; 17. positioning rod hole; 18. counterweight; 19. positioning rod. DETAILED DESCRIPTION

[0041] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0042] In order to make the pressure and the rotation force cooperate synchronously, so that the pipe pile generates friction with the surrounding soil during the pressing process, so as to greatly shorten the pile pressing time and improve the pile driving construction efficiency of the pipe pile, as an embodiment of the present invention, Figures 1 to 8 As shown, a piling device for soft soil roadbed pipe pile construction described in the present invention comprises a support seat 1, a walking device 2 is arranged at the bottom of the support seat 1, a first frame 3 and a second frame 4 are arranged on both sides of the top of the support seat 1, a cap assembly 5 is horizontally arranged between the first frame 3 and the second frame 4, a cylinder 11 is fixed on the top of the first frame 3 and the second frame 4, the output end of the cylinder 11 is fixed to the two ends of the cap assembly 5, and a pile hole 6 is opened in the middle of the support seat 1;

[0043] It is characterized in that a support arm 9 is connected to the side of the first frame 3 close to the second frame 4, a rotating support structure 7 is arranged in the middle of the base assembly 5, a rotating force device 8 for driving the pipe pile synchronous cylinder 11 to rotate is connected to the bottom of the rotating support structure 7, the rotating force device 8 is connected to the support arm 9 and the base assembly 5, and a locking structure for fixing the pipe pile is provided in the rotating support structure 7.

[0044] When in use, after the soft soil roadbed to be constructed has been compacted, the walking device 2 carries the entire piling mechanism to move to the roadbed position where piling is required, and the pipe piles required for piling are vertically lifted to the base assembly 5 by a crane, and then dropped, so that the bottom of the pipe pile passes through the rotating support structure 7 and the locking structure in the base assembly 5 in turn, enters the pile hole 6, and contacts the ground after passing through the walking device 2. The pipe pile is locked in the base assembly 5 by the locking structure, and the cylinder 11 pushes down the base assembly 5, so that the pipe pile presses down on the roadbed to realize the piling operation; accompanied by the rotation device 8 in the base assembly 5, the pipe pile is accompanied by a synchronous rotation movement during the downward pressing process, and the addition of the rotation force enables the pipe pile to cut into the soft soil layer faster.

[0045] For supporting the pipe piles, for example, Figure 2 , Figure 3 As shown, the present invention also includes that the base assembly 5 includes a base 501 arranged parallel to the support seat 1, and a supporting through hole 502 coaxial with the pile hole 6 is opened in the middle of the base 501, and side openings 503 are symmetrically opened on both sides of the base 501 away from the first frame 3 and the second frame 4.

[0046] When in use, the rotating support structure 7 is supported by the base 501 so that the locking structure can fix the pipe pile on the base 501. After the oil cylinder 11 applies pressure to the base 501, the base 501 will concentrate the pressure on the pipe pile that creates resistance with the ground, so that the bottom of the pipe pile gradually enters the soil.

[0047] In order to enable the pipe pile to obtain a rotational force while being pressed into the ground, for example, Figure 4 , Figure 5 , Figure 6 As shown, the present invention also includes that the rotating support structure 7 includes an upper bearing sleeve 705 fixed to the top of the supporting through hole 502, a middle sleeve 702 is arranged at the bottom of the upper bearing sleeve 705, a plurality of groups of rolling steel balls 703 arranged at equal distances are embedded in the circumference of the middle sleeve 702, a lower sleeve 704 fixed to the inner wall of the supporting through hole 502 is arranged at the bottom of the middle sleeve 702, and a rotating sleeve 701 coaxially arranged with the pile hole 6 is connected to the bottom of the lower sleeve 704;

[0048] The rotating sleeve 701 has telescopic holes 706 symmetrically formed on both sides, and a plurality of key holes 707 formed on the bottom of the rotating sleeve 701;

[0049] The locking structure is fixed on the rotating sleeve 701 , and the rotating force device 8 is connected to the bottom of the rotating sleeve 701 .

[0050] When in use, the rotating support structure 7 can be one group or two groups. When it is one group, it is arranged on the top of the rotating sleeve 701. When it is two groups, it is arranged on the top and bottom of the rotating sleeve 701 respectively, so that the rotating sleeve 701 can be rotationally supported in the supporting through hole 502. The rotating support structure 7 synchronizes the rotational force applied by the rotational force device 8 to the locking structure, so that the pipe piles in the locking structure can obtain the rotational force synchronously while pressing down on the ground.

[0051] In order to fix the pipe pile with the pressure member, for example, Figure 4 , Figure 5 As shown, the present invention also includes that the locking structure includes a first inner oil cylinder 151 and a second inner oil cylinder 152, and the first inner oil cylinder 151 and the second inner oil cylinder 152 are respectively arranged in side openings 503 symmetrically opened on both sides of the support platform 501;

[0052] The first inner cylinder 151 and the second inner cylinder 152 are symmetrically arranged on both sides of the rotating sleeve 701, and the sleeves of the first inner cylinder 151 and the second inner cylinder 152 are fixed to the rotating sleeve 701. The rotating sleeve 701 is symmetrically provided with slips 153 on both sides, and the output ends of the first inner cylinder 151 and the second inner cylinder 152 pass through the telescopic holes 706 and are respectively connected to the slips 153 at corresponding positions.

[0053] When in use, the output end of the first inner cylinder 151 and the output end of the second inner cylinder 152 are pushed out simultaneously, so that the slips 153 on the first inner cylinder 151 and the second inner cylinder 152 clamp the pipe piles that enter the base 501 and are located in the rotating sleeve 701, so that when the rotating sleeve 701 rotates, the pipe piles are rotated.

[0054] In order to obtain synchronous rotation force during the downward pressing of the pipe pile, so as to improve the efficiency of the pipe pile driving, for example, Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the present invention also includes that the rotation device 8 includes a worm wheel 801 coaxially arranged with the pile hole 6, and the worm wheel 801 is sleeved on the bottom of the rotating sleeve 701, and a key pin 802 is arranged on the inner side of the worm wheel 801, and the key pin 802 is arranged in a key pin hole 707 away from the side of the worm wheel 801;

[0055] A worm 803 is connected to one side of the worm wheel 801, and both ends of the worm wheel 801 are rotatably connected to the support platform 501 through bearings. The outer periphery of the shaft head at one end of the worm wheel 801 is connected to the first gear 804, a second gear 805 is meshed with one side of the first gear 804, and a third gear 806 is meshed with the top of the second gear 805. The second gear 805 and the third gear 806 are fixedly connected to the support arm 9, and the bottom of the support arm 9 passes through the support platform 501 and is fixed to the support seat 1.

[0056] When in use, after the oil cylinder 11 applies pressure to the cap 501, the pile will move downward along with the cap 501. When the cap 501 moves downward, the rotation device 8 installed in the cap 501 also moves downward synchronously. During the downward movement of the rotation device 8, the first gear 804 at the end of the worm 803 will move downward on the side of the second gear 805 and the third gear 806. At the same time, based on the principle of gear meshing movement, when the first gear 804 passes through the side of the second gear 805 and the third gear 806 successively, the worm 803 generates a rotation force.

[0057] After the worm 803 rotates, the rotation force of the worm 803 will be synchronized with the worm wheel 801, so that the worm wheel 801 drives the rotating sleeve 701 to rotate. When the rotating sleeve 701 goes down along with the cap 501, the pipe pile locked in the rotating sleeve 701 rotates synchronously with the worm wheel 801, so that the pipe pile generates friction with the surrounding soil during the pressing process, so as to greatly shorten the pile pressing time and improve the pile driving construction efficiency of the pipe pile.

[0058] During this period, the downward distance of the pipe pile in the rotating sleeve 701 is consistent with the rotation distance of the worm wheel 801, so that the downward pressure and rotation force of the pipe pile are synchronized, so that the pile driving operation of the pipe pile is better controlled. With the help of the combination of downward pressure and rotation force, the pipe pile generates friction with the surrounding soil during the pressing process. This friction can enhance the friction between the pile body and the soil, thereby improving the bearing capacity and stability of the pile;

[0059] After the pipe pile goes down a certain distance, the locking structure releases the locking of the pipe pile, and the oil cylinder 11 drives the cap 501 to return upward, and then the locking structure locks the pipe pile again, and this cycle is repeated until the pipe pile is pressed into the roadbed.

[0060] In order to move the overall piling device on the construction roadbed, for example, Figure 2 , Figure 8 As shown, the present invention also includes that the walking device 2 includes two groups of symmetrically arranged crawler walkers 202, a base frame 201 is connected between the two groups of crawler walkers 202, and a pile opening 203 coaxial with the pile hole 6 is opened through the middle of the base frame 201.

[0061] When in use, the crawler walker 202 drives the base frame 201 to move, so that the upper support seat 1 can carry the upper piling mechanism to move on the construction roadbed.

[0062] In order to ensure the effective operation of the piling operation, for example, Figure 2As shown, the present invention also includes that an oil tank 12 is provided on one side of the top of the support seat 1 away from the pile hole 6, and a generator 13 and an oil pump station 14 for generating electricity are respectively provided on both sides of the oil tank 12, and the oil circuit of the oil pump station 14 is respectively connected to the oil cylinder 11, the first inner oil cylinder 151 and the second inner oil cylinder 152.

[0063] When in use, the generator 13 provides power support for the entire pile driving equipment, the oil tank 12 provides oil for the generator 13, and the oil pump station 14 provides pressure support for the oil pressure part of the entire pile driving equipment.

[0064] In order to ensure the accuracy of the distance of the pile down, for example, Figure 3 As shown, the present invention also includes that a distance sensor 16 is disposed on the top of the oil tank 12 , and the detection end of the distance sensor 16 faces the support platform 501 .

[0065] When in use, the distance sensor 16 detects the downward distance of the foundation assembly 5 to further ensure the downward progress of the pile driving in the soil.

[0066] In order to make the piles stable in the soil, for example, Figure 1 , Figure 3 , Figure 8 As shown, the present invention also includes that a plurality of groups of counterweight blocks 18 with rope threading slots at the bottom are arranged on the top of the support seat 1 and located on the outer layer of the first upright frame 3 and the second upright frame 4, and a plurality of groups of coaxial corresponding positioning rod holes 17 are opened on the top of the support seat 1 and the bottom of the counterweight blocks 18, and a positioning rod 19 is inserted into the positioning rod hole 17.

[0067] When in use, select a counterweight 18 of the required weight, and insert the positioning rod 19 into the positioning rod hole 17 on the support seat 1 where the counterweight 18 is to be assembled, hang the counterweight 18 on the lifting device through the lifting device, and lift the counterweight 18 to the top of the positioning rod hole 17 through the lifting device. After the lifting device lowers the lifting device, the positioning rod hole 17 at the bottom of the counterweight 18 will be inserted into the positioning rod 19, so as to realize the assembly on the support seat 1;

[0068] After the pipe piles are pressed into the roadbed, the whole pile driving device is subjected to the increased deadweight of the counterweight block 18, so that the operation stability of the whole pile driving device is better.

[0069] When the present invention is in use, after the soft soil roadbed to be constructed is compacted, the crawler walking device 202 drives the chassis 201 to move, so that the upper support seat 1 can carry the upper piling mechanism to move on the construction roadbed. During this period, the generator 13 provides power support for the entire piling equipment, the oil tank 12 provides oil for the generator 13, and the oil pump station 14 provides pressure support for the oil pressure part of the entire piling equipment. The pipe piles required for piling are vertically lifted to the top of the cap assembly 5 by the crane, and then dropped, so that the bottom of the pipe pile passes through the rotating support structure 7 and the locking structure in the cap assembly 5 in turn, enters the pile hole 6, and contacts the ground after passing through the walking device 2, and the pipe pile is locked in the cap assembly 5 by the locking structure, and the oil cylinder 11 pushes down the cap assembly 5, so that the pipe pile presses down on the roadbed to achieve the piling operation;With the rotation device 8 in the cap assembly 5, the pipe pile is accompanied by a synchronous rotational movement during the downward pressing process. The addition of the rotational force enables the pipe pile to cut into the soft soil layer faster. The cap 501 supports the rotation support structure 7, so that the locking structure can fix the pipe pile on the cap 501. After the oil cylinder 11 applies pressure to the cap 501, the cap 501 will concentrate the pressure on the pipe pile that generates resistance with the ground, so that the bottom of the pipe pile gradually enters the soil. The rotation support structure 7 can be one group or two groups. When there is one group, it is set at the top of the rotating sleeve 701. When there are two groups, the top and bottom of the rotating sleeve 701 are respectively set, so that the rotating sleeve 701 can be obtained in the support through hole 502. The rotating support structure 7 synchronizes the rotating force applied by the rotating force device 8 to the locking structure, so that the pipe pile in the locking structure obtains the rotating force synchronously while pressing the ground. The output end of the first inner oil cylinder 151 and the output end of the second inner oil cylinder 152 are pushed out simultaneously, so that the slips 153 on the first inner oil cylinder 151 and the second inner oil cylinder 152 clamp the pipe pile that enters the base 501 and is located in the rotating sleeve 701, so that when the rotating sleeve 701 rotates, the pipe pile is rotated. After the oil cylinder 11 applies pressure to the base 501, the pipe pile will move downward with the base 501. When the base 501 moves downward, the rotating force device 8 installed in the base 501 also moves downward synchronously. During the downward movement of the worm 803, the first gear 804 at the end of the worm 803 will move downward on the side of the second gear 805 and the third gear 806. At the same time, based on the principle of gear meshing movement, when the first gear 804 passes through the side of the second gear 805 and the third gear 806 in succession, the worm 803 generates a rotational force. After the worm 803 rotates, the rotational force of the worm 803 will be synchronized with the worm wheel 801, so that the worm wheel 801 drives the rotating sleeve 701 to rotate. When the rotating sleeve 701 descends along with the bearing platform 501, the pipe pile locked in the rotating sleeve 701 generates a rotation synchronous with the worm wheel 801, so that the pipe pile generates friction with the surrounding soil during the pressing process, so as to greatly The time of pile pressing is shortened, and the efficiency of pile driving is improved. During the period, the downward distance of the pile in the rotating sleeve 701 is consistent with the rotation distance of the worm wheel 801, so that the downward pressure and rotation force of the pile are synchronized, so that the pile driving operation can be better controlled. With the combination of downward pressure and rotation force, the pile generates friction with the surrounding soil during the pressing process. This friction can enhance the friction between the pile body and the soil, thereby improving the bearing capacity and stability of the pile. After the pile goes down a certain distance, the locking structure releases the dynamic lock on the pile, and the oil cylinder 11 drives the cap 501 to return upward, and then the locking structure locks the pile again, and this cycle is repeated until the pile is pressed into the roadbed and the pile driving operation is completed. ;

[0070] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A piling device for soft soil roadbed pipe pile construction, characterized in that: The invention comprises a support base (1), a walking device (2) is arranged at the bottom of the support base (1), a first frame (3) and a second frame (4) are arranged on both sides of the top of the support base (1), a support base assembly (5) is arranged horizontally between the first frame (3) and the second frame (4), a cylinder (11) is fixed on the top of the first frame (3) and the second frame (4), the output end of the cylinder (11) is fixed to the two ends of the support base assembly (5), and a pile hole (6) is opened in the middle of the support base (1); It is characterized in that a support arm (9) is connected to one side of the first stand (3) close to the second stand (4), a rotating support structure (7) is provided in the middle of the support assembly (5), a rotating force device (8) for driving the pipe pile synchronous cylinder (11) to rotate is connected to the bottom of the rotating support structure (7), the rotating force device (8) is connected to the support arm (9) and the support assembly (5), and a locking structure for fixing the pipe pile is provided in the rotating support structure (7).

2. A piling device for soft soil roadbed pipe pile construction according to claim 1, characterized in that: The support platform assembly (5) comprises a support platform (501) arranged parallel to the support seat (1), and a supporting through hole (502) coaxial with the pile hole (6) is provided in the middle of the support platform (501), and side openings (503) are symmetrically provided on two sides of the support platform (501) away from the first stand (3) and the second stand (4).

3. A piling device for soft soil roadbed pipe pile construction according to claim 2, characterized in that: The rotating support structure (7) comprises an upper bearing sleeve (705) fixed to the top of the supporting through hole (502), a middle sleeve (702) is arranged at the bottom of the upper bearing sleeve (705), a plurality of groups of rolling steel balls (703) are embedded in the circumference of the middle sleeve (702) and arranged at equal distances, a lower sleeve (704) is arranged at the bottom of the middle sleeve (702) and fixed to the inner wall of the supporting through hole (502), and a rotating sleeve (701) coaxially arranged with the pile hole (6) is connected to the bottom of the lower sleeve (704); The rotating sleeve (701) is symmetrically provided with telescopic holes (706) on both sides, and the bottom of the rotating sleeve (701) is provided with a plurality of key holes (707); The locking structure is fixed on the rotating sleeve (701), and the rotating force device (8) is connected to the bottom of the rotating sleeve (701).

4. A piling device for soft soil roadbed pipe pile construction according to claim 3, characterized in that: The locking structure comprises a first inner oil cylinder (151) and a second inner oil cylinder (152), wherein the first inner oil cylinder (151) and the second inner oil cylinder (152) are respectively arranged in side openings (503) symmetrically opened on both sides of the support platform (501); The first inner oil cylinder (151) and the second inner oil cylinder (152) are symmetrically arranged on both sides of the rotating sleeve (701), and the sleeves of the first inner oil cylinder (151) and the second inner oil cylinder (152) are fixed to the rotating sleeve (701). Slips (153) are symmetrically arranged on both sides of the rotating sleeve (701), and the output ends of the first inner oil cylinder (151) and the second inner oil cylinder (152) pass through the telescopic holes (706) and are respectively connected to the slips (153) at corresponding positions.

5. A piling device for soft soil roadbed pipe pile construction according to claim 4, characterized in that: The rotary force device (8) comprises a worm wheel (801) coaxially arranged with the pile hole (6), and the worm wheel (801) is sleeved on the bottom of the rotating sleeve (701), a key pin (802) is arranged on the inner side of the worm wheel (801), and the key pin (802) is arranged in a key pin hole (707) on the side away from the worm wheel (801); A worm (803) is connected to one side of the worm wheel (801), and both ends of the worm wheel (801) are rotatably connected to the support platform (501) via bearings. The outer periphery of the shaft head at one end of the worm wheel (801) is connected to a first gear (804), a second gear (805) is meshed on one side of the first gear (804), and a third gear (806) is meshed on the top of the second gear (805). The second gear (805) and the third gear (806) are fixedly connected to the support arm (9), and the bottom of the support arm (9) passes through the support platform (501) and is fixed to the support seat (1).

6. A piling device for soft soil roadbed pipe pile construction according to claim 5, characterized in that: The walking device (2) comprises two groups of symmetrically arranged crawler walkers (202), a base frame (201) is connected between the two groups of crawler walkers (202), and a pile lowering opening (203) coaxial with the pile penetration hole (6) is opened through the middle of the base frame (201).

7. A piling device for soft soil roadbed pipe pile construction according to claim 6, characterized in that: An oil tank (12) is provided on one side of the top of the support seat (1) away from the pile hole (6), and a generator (13) and an oil pump station (14) for generating electricity are respectively provided on both sides of the oil tank (12), and the oil circuit of the oil pump station (14) is respectively connected to the oil cylinder (11), the first inner oil cylinder (151) and the second inner oil cylinder (152).

8. A piling device for soft soil roadbed pipe pile construction according to claim 7, characterized in that: A distance sensor (16) is arranged on the top of the oil tank (12), and the detection end of the distance sensor (16) faces the support platform (501).

9. A piling device for soft soil roadbed pipe pile construction according to claim 8, characterized in that: A plurality of groups of counterweight blocks (18) with rope threading slots at the bottom are arranged at the top of the support seat (1) and located on the outer layer of the first stand (3) and the second stand (4); a plurality of groups of coaxial corresponding positioning rod holes (17) are opened at the top of the support seat (1) and the bottom of the counterweight blocks (18); positioning rods (19) are inserted into the positioning rod holes (17).

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