Pushing and lifting device for pit type static pressure pile reinforcing construction support

Abstract

The utility model discloses a pushing and lifting device for pit type static pressure pile reinforcing construction support, which belongs to the technical field of civil engineering construction and utilizes a movable support frame as a support main body, adjusting support legs are arranged at the bottom of the movable support frame, a support arm is arranged on the movable support frame, and a lifting plate is slidably arranged on the support arm through a lifting support. A jack positioning push rod is arranged on the lifting support and located on one side of the lifting plate, the lifting support drives and adjusts the lifting plate to move up and down so as to adjust the jack on the lifting plate to reach a preset position, the jack positioning push rod is used for pushing the jack, and the placing position of the jack is adjusted until the jack reaches a set position. The problems of fixing and positioning in the lifting process of the jack are solved, the position of the jack is adjusted through the jack positioning push rod so that the jack can be located at the set position of the pile top, and it is avoided that in the subsequent pile pressing process, the pile is subjected to eccentric force, and finally the pile is pressed to be inclined.

Description

Technical Field

[0001] The utility model belongs to the technical field of civil engineering construction, and in particular relates to a pushing device for supporting pit type static pressure pile reinforcement construction. Background Art

[0002] Pile underpinning is a general term for all foundation underpinning methods that use pile foundations, and is used for foundations such as soft clay, loose sand, saturated loess, collapsible loess, plain fill, and miscellaneous fill. There are many methods of pile underpinning, such as the commonly used pre-test pile underpinning and driven pile underpinning, or the commonly used static pressure pile underpinning, anchor static pressure pile underpinning, cast-in-place pile underpinning, and root pile underpinning.

[0003] Pit-type static pressure piles are a type of static pressure pile underpinning operation. By excavating a replacement guide pit under the foundation of an existing building, using the deadweight of the building's superstructure as a reaction force, and using jacks to press in prefabricated steel pipe pile sections or reinforced concrete pile sections section by section, the problem of uneven settlement of the original foundation of the structure is solved, ensuring the safety and stability of the building.

[0004] When constructing pit-type static pressure piles, first, on the side close to the existing building to be replaced, a vertical guide pit with a cross-section of 1.5m deep and 1.0m wide is excavated manually at a depth of 1.0m at the bottom of the foundation. The vertical guide pit is then extended horizontally to the bottom of the foundation beam, pedestal beam or foundation plate, and a replacement working pit with a length of 0.8m, a width of 0.5m and a depth of 1.8m is excavated vertically. During the pile pressing operation, the jack is placed under the foundation of the original structure, and the replacement pile is installed on top. Using the deadweight of the structure as the reaction force, the oil pressure drives the jack to press the single-section steel pile or precast concrete pile into the foundation soil section by section, connect the piles, and repeat the above process until the steel pile or precast concrete pile is pressed to the designed elevation.

[0005] The construction of pit-type static piles is limited by the narrow construction space. Large lifting machinery cannot enter the pit. At present, the only way to start the pile pressing work is to repeatedly push the jack to the top of the prefabricated pile by manpower. The weight of the jack itself is generally from tens of kilograms to more than 100 kilograms. In the process of pushing it upward, there are safety risks to the safety of the construction workers and the efficiency is low. It is difficult to place the jack and the prefabricated pile during the operation. In order to prevent the static pile from deflecting and affecting the quality of the project and improve work efficiency, the quick and safe placement of the jack has always been an urgent problem to be solved in this operation method. Utility Model Content

[0006] The utility model aims to provide a pushing device for supporting the pit type static pressure pile reinforcement construction, so as to overcome the problems in the prior art that the jack is pushed by manpower during the pit type static pressure pile construction process and the jack and prefabricated pile are difficult to place during the operation.

[0007] A pushing device for supporting pit-type static pressure pile reinforcement construction includes a mobile support frame, an adjustable support leg is arranged at the bottom of the mobile support frame, a support arm is arranged on the mobile support frame, a lifting plate is slidably arranged on the support arm through a lifting support, a jack positioning push rod is arranged on the lifting support at one side of the lifting plate, and a power device for driving the lifting support to move on the support arm is arranged on the mobile support frame.

[0008] Preferably, the adjustable support leg comprises a support seat, a threaded adjustment rod is arranged at the upper end of the support seat, and the threaded adjustment rod on the adjustable support leg is threadedly connected to the bottom of the movable support frame.

[0009] Preferably, the movable support frame is provided with an anchor hole for fixing a ground anchor.

[0010] Preferably, the lifting support and the support arm are connected by a screw transmission structure.

[0011] Preferably, the screw transmission structure includes: a slide groove is provided on one side of the support arm, a transmission screw is provided in the slide groove of the support arm, and a driving motor for driving the transmission screw to rotate is provided at one end of the transmission screw; a slider with a threaded hole is provided at one end of the lifting support, the slider is provided in the slide groove on one side of the support arm, and the slider is engaged with the transmission screw for transmission.

[0012] Preferably, a guide groove is provided on one side of the support arm, a guide slider capable of sliding in the guide groove of the support arm is provided on one side of the lifting support, a pulley device is provided on the upper end of the support arm, a winch drive device is provided on one side of the support arm, a winch drum is provided on the driving shaft of the winch drive device, a winch rope is provided on the winch drum, and the winch rope passes around the pulley device and is fixedly connected to the lifting support.

[0013] Preferably, a guide bracket is provided on the lifting support, and the jack positioning push rod is provided on the guide bracket.

[0014] Preferably, the jack positioning push rod includes a threaded push rod and a clamping and fixing rod, one end of the threaded push rod is rotatably connected to one end of the clamping and fixing rod, the surface of the threaded push rod is provided with threads, and the threaded push rod is threadedly connected to the guide bracket; the surface of the clamping and fixing rod is provided with threads, the clamping and fixing rod is provided with a locking nut that can engage with the threads, the clamping and fixing rod is provided with a locking top block, the locking top block is located on one side of the locking nut, and the other end of the clamping and fixing rod is hinged with two clamping parts, and the two clamping parts can rotate relative to the end of the clamping and fixing rod.

[0015] Preferably, the support arm adopts a telescopic support arm structure.

[0016] Preferably, the support arm includes a first telescopic arm and a second telescopic arm, one end of the first telescopic arm is fixed on the mobile support frame, one end of the second telescopic arm is an open structure, the second telescopic arm is nested on the other end of the first telescopic arm through the opening structure, and a limiting plate is provided on one side of the upper end of the second telescopic arm.

[0017] Compared with the prior art, the utility model has the following beneficial technical effects:

[0018] The utility model provides a pushing and lifting device for supporting the construction of pit-type static pressure pile reinforcement, using a mobile support frame as a supporting body, an adjustable support leg is arranged at the bottom of the mobile support frame to provide a stable movable support platform, a supporting arm is arranged on the mobile support frame, a lifting plate is arranged on the supporting arm through a lifting support sliding, a jack positioning push rod is arranged on the lifting support at one side of the lifting plate, a power device for driving the lifting support to move on the supporting arm is arranged on the mobile support frame, the lifting support is used to drive the adjustment lifting plate to move up and down, so as to adjust the jack on the lifting plate to reach a predetermined position, the jack positioning push rod is used to push the jack, and the placement position of the jack is adjusted until it reaches the set position, thereby solving the fixing and positioning problems in the lifting and lowering process of the jack, and the utility model adjusts the position of the jack by the jack positioning push rod so that the jack is in the set position of the pile top, thereby preventing the pile from being pressed obliquely due to eccentric force in the subsequent pile pressing process.

[0019] Preferably, the height of the support legs is adjusted by rotating the support legs to ensure the horizontality of the mobile support frame.

[0020] Preferably, the transmission screw is meshed with the slider at one end of the lifting support to ensure the stability of the drive, while preventing the risk of the lifting support falling due to its own weight due to a sudden power outage, thereby ensuring safety during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of a pushing device for supporting pit-type static pressure pile reinforcement construction in an embodiment of the utility model.

[0022] Figure 2 It is a top view of the jack positioning push rod installation structure in the embodiment of the utility model.

[0023] Figure 3 It is a schematic diagram of the jack positioning push rod structure in the embodiment of the utility model.

[0024] Figure 4 This is a schematic diagram of the transmission structure of the lifting support and the support arm through a lead screw in an embodiment of the utility model.

[0025] In the figure, 1. movable support frame; 2. adjustable support leg; 3. support arm; 4. lifting plate; 5. lifting support; 6. jack positioning push rod; 7. anchor hole; 8. pulley device; 9. winch drive device; 10. moving wheel; 11. transmission screw; 12. winch rope; 13. guide bracket; 14. threaded push rod; 15. clamping fixing rod; 16. locking nut; 17. locking top block; 18. clamping part; 19. first telescopic arm; 20. second telescopic arm; 21. limit plate; 22. telescopic oblique support; 23. first oblique support arm; 24. second oblique support arm; 25. drive motor. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] like Figure 1As shown, the utility model provides a pushing device for supporting the construction of pit-type static pressure pile reinforcement, including a mobile support frame 1, an adjustable support leg 2 is arranged at the bottom of the mobile support frame 1, a support arm 3 is arranged on the mobile support frame 1, a lifting plate 4 is arranged on the support arm 3, the lifting plate 4 is slidably arranged on the support arm 3 through a lifting support 5, and a jack positioning push rod 6 is arranged on the lifting support 5 at one side of the lifting plate 4 for pushing and retrieving the jack; a power device for driving the lifting support 5 to move on the support arm 3 is arranged on the mobile support frame 1, and a moving wheel 10 is arranged at the bottom of the mobile support frame 1. The utility model uses the lifting plate 4 as a placement for the jack The platform is used to place the jack that needs to be pushed and placed on the lifting plate 4. After the jack is clamped and fixed by the jack positioning push rod 6, the power device is started to drive the lifting support 5 to drive the adjustment lifting plate 4 to move up and down, thereby adjusting the jack on the lifting plate 4 to reach a predetermined position, and then the jack positioning push rod 6 is used to push the jack and adjust the placement position of the jack until it reaches the set position, which solves the problem of fixing and positioning the jack during the lifting process. The utility model adjusts the position of the jack by the jack positioning push rod 6 so that the jack is in the set position at the top of the pile, thereby preventing the pile from being subjected to eccentric force and being pressed obliquely during the subsequent pile pressing process.

[0029] Specifically, a plurality of adjustable support legs 2 are provided at the bottom of the mobile support frame 1 , which are used to support and position the mobile support frame 1 after it reaches a designated position, thereby improving the stability of the mobile support frame 1 .

[0030] In the embodiments of the present application, Figure 1 As shown, four adjustment support legs 2 are arranged at the bottom of the mobile support frame 1 of the present application. The four adjustment support legs 2 are distributed around the bottom of the mobile support frame 1 and are used to support the mobile support frame 1 for leveling.

[0031] An adjustment threaded hole is provided at the bottom of the mobile support frame 1, and the adjustment support leg 2 includes a support seat, and a threaded adjustment rod is provided at the upper end of the support seat. The threaded adjustment rod on the adjustment support leg 2 is threadedly connected to the adjustment threaded hole at the bottom of the mobile support frame 1. The height of the adjustment support leg 2 can be adjusted by rotating the adjustment support leg 2 to ensure the horizontality of the mobile support frame 1.

[0032] The support seat and the threaded adjustment rod are hinged with a support portion via a rotating shaft, and the support seat can rotate relative to the threaded adjustment rod to adapt to ground surfaces with different slopes.

[0033] Anchor holes 7 are provided on the mobile support frame 1 for anchoring the mobile support frame 1 through ground anchors, which can effectively ensure the stability of the push-lift device for pit-type static pressure pile reinforcement construction support during use and prevent the risk of eccentric flipping when lifting a jack with a large mass.

[0034] In one embodiment of the present application, the lifting support 5 and the support arm 3 are connected by a screw transmission structure, such as Figure 4 As shown, specifically, the screw transmission structure includes: a slide groove is provided on one side of the support arm 3, a transmission screw 11 is provided in the slide groove of the support arm 3, and a driving motor 25 is provided at one end of the transmission screw 11 for driving the transmission screw 11 to rotate; the driving motor 25 and the transmission screw 11 are transmitted through a worm gear; a slider with a threaded hole is provided at one end of the lifting support 5, and the slider is provided in the slide groove on one side of the support arm 3, and the slider is engaged with the transmission screw 11 for transmission. The transmission screw 11 is engaged with the slider at one end of the lifting support 5 for transmission, which can ensure the stability of the drive and prevent the risk of the lifting support 5 falling due to its own weight due to sudden power failure, thereby ensuring safety during use.

[0035] In another embodiment of the present application, a guide groove is provided on one side of the support arm 3, and a guide slider capable of sliding in the guide groove of the support arm 3 is provided on one side of the lifting support 5. A pulley device 8 is provided on the upper end of the support arm 3, and a winch drive device 9 is provided on one side of the support arm 3. The driving shaft of the winch drive device 9 is provided with a winch drum, and a winch rope 12 is provided on the winch drum. The winch rope 12 bypasses the pulley device 8 and is fixedly connected to the lifting support 5. The lifting support 5 is lifted or lowered by using the winch rope 12 on the winch drive device 9, thereby realizing the lifting and lowering of the lifting plate 4 on the lifting support 5, and achieving the purpose of adjusting the jack to different heights. The structure is simple and suitable for use in pit-type static pressure pile reinforcement construction sites with complex working conditions.

[0036] like Figure 2 As shown, a guide bracket 13 is provided on the lifting support 5, and the jack positioning push rod 6 is provided on the guide bracket 13. Specifically, as Figure 3 As shown, the jack positioning push rod 6 includes a threaded push rod 14 and a clamping and fixing rod 15. One end of the threaded push rod 14 is rotatably connected to one end of the clamping and fixing rod 15. The surface of the threaded push rod 14 is provided with threads. The threaded push rod 14 is threadedly connected to the guide bracket 13. The surface of the clamping and fixing rod 15 is provided with threads. The clamping and fixing rod 15 is provided with a locking nut 16 that can engage with the threads. The clamping and fixing rod 15 is provided with a locking top block 17. The locking top block 17 is located on one side of the locking nut 16. The other end of the clamping and fixing rod 15 is hinged with two clamping parts 18. Both clamping parts 18 can rotate relative to the end of the clamping and fixing rod 15 to form an annular structure for clamping the jack. The two clamping parts 18 are both arc-shaped structures. One end of the locking top block 17 can contact the outer side of the clamping part 18. As shown Figure 2As shown, when in use, the locking nut 16 is turned and loosened, and then the two clamping parts 18 are adjusted to open. After the jack is placed on the lifting plate 4, the jack is pushed between the two clamping parts 18, and then the locking nut 16 is tightened. The locking nut 16 is used to generate thrust on the locking top block 17, and the locking top block 17 is used to squeeze the two clamping parts 18, forcing the two clamping parts 18 to clamp the jack inward; then the threaded push rod 14 is rotated to adjust the position of the jack on the lifting plate 4; the present application adopts a rotatably connected threaded push rod 14 and a clamping fixing rod 15 to form a structure that can simultaneously push and clamp and position, thereby ensuring the stability of the jack during the pushing process, ensuring the safety of construction, and being able to accurately adjust the position of the jack.

[0037] like Figure 1 , Figure 4 As shown, the support arm 3 of the present application adopts a telescopic support arm structure. Specifically, the support arm 3 includes a first telescopic arm 19 and a second telescopic arm 20, one end of the first telescopic arm 19 is fixed to the mobile support frame 1, one end of the second telescopic arm 20 is an open structure, the second telescopic arm 20 is nested in the first telescopic arm 19, and a limiting plate 21 is provided on one side of the upper end of the second telescopic arm 20 for limiting the lifting support 5. When the lifting support 5 drives the lifting plate 4 to rise, the lifting support 5 contacts the limiting plate 21 on the second telescopic arm 20. At this time, the power device continues to drive the lifting support 5 to drive the second telescopic arm 20 to rise together, thereby achieving the purpose of adjusting different height requirements.

[0038] In the initial position, when the lifting support 5 is at the bottom, the second telescopic arm 20 is at the lowest position under the action of gravity; the lifting support 5 rises from the bottom position to contact the limit plate 21 on the second telescopic arm 20. At this time, the rising height of the lifting support 5 meets the general construction requirements. This is the conventional rising height, and the specific height setting is designed according to the conventional requirements of the construction site; for special height requirements during construction, the second telescopic arm 20 and the first telescopic arm 19 are used to adjust the height of the lifting support 5. This is suitable for special requirements in the process of pit-type static pressure pile reinforcement construction. There is no need to replace equipment, the structure is simple, and it is suitable for a variety of working conditions.

[0039] In particular, such as Figure 1 , Figure 2 As shown, a telescopic oblique support 22 is hingedly provided on one side of the second telescopic arm 20, the upper end of the telescopic oblique support 22 is hinged to the upper end of the second telescopic arm 20, and the lower end of the telescopic oblique support 22 is hinged to the movable support frame 1. The telescopic oblique support 22 is used to support the support arm 3, thereby improving the lateral stability of the support arm 3.

[0040] Specifically, Figure 1As shown, the telescopic oblique support 22 includes a first oblique support arm 23 and a second oblique support arm 24, one end of the first oblique support arm 23 is nested in one end of the second oblique support arm 24, the other end of the first oblique support arm 23 is hinged to the movable support frame 1, and the other end of the second oblique support arm 24 is hinged to the upper end of the second telescopic arm 20. When the second telescopic arm 20 and the first telescopic arm 19 are driven to telescope through the lifting support 5, the first oblique support arm 23 and the second oblique support arm 24 are telescoped synchronously. When in the lowest position, one end of the first oblique support arm 23 contacts the inside of the second oblique support arm 24. At this time, the second oblique support arm 24 and the first oblique support arm 23 form a rigid support structure to laterally support the support arm 3.

[0041] By utilizing the above-mentioned pushing and lifting device for pit-type static pressure pile reinforcement construction support of the utility model, during the process of pit-type static pressure pile reinforcement construction support, when placing the jack or other weight support structure that needs lifting support, the pushing and lifting device for pit-type static pressure pile reinforcement construction support is moved to a suitable position, the lifting plate 4 is lowered to the lowest position or the height suitable for the lifting of the jack, the jack is placed on the lifting plate 4, and then the jack is clamped by the jack positioning push rod 6, and then the jack is moved to the middle position of the lifting plate 4 to prevent the lifting plate 4 from being lifted during the lifting process. The jack slips during the lowering process; then the pushing device for the pit-type static pressure pile reinforcement construction support is moved to the target position, the angle of the lifting plate 4 is adjusted to fix the mobile support frame 1, and then the power device is used to drive the lifting support 5 to move on the support arm 3, driving the lifting plate 4 and the jack on the lifting plate 4 to rise. After reaching the target position of the jack, the jack positioning push rod 6 is rotated, and the jack positioning push rod 6 is used to push the jack to the target position of the jack, and then the jack positioning push rod 6 is rotated in the opposite direction to return the jack positioning push rod 6 to complete the lifting of the jack. The structural design of the present application can not only greatly reduce the labor intensity of the construction workers, but also greatly ensure the safety of the construction workers. The present application uses the jack positioning push rod 6 to clamp the jack to ensure the stability of the clamping, and the structure is simple, which is conducive to the miniaturization of the overall equipment.

[0042] The present application adopts a lifting support 5 and a support arm 3 structural design with a screw drive arrangement, which has stable transmission and is conducive to the miniaturization of the overall equipment; and can avoid the risk of sudden falling of the lifting support 5 in the event of a sudden power outage, greatly improving the safety of the overall equipment.

[0043] The present application adopts a winch drive device 9 to perform lifting operations on the lifting support 5. It has a simple structure and can be used in complex working conditions. The utility model solves the problem of the jack needing to rise or fall when constructing in a narrow environment, greatly reduces the labor intensity of construction workers, and makes the process of raising or lowering the jack more convenient.

Claims

1. A pushing device for supporting pit type static pressure pile reinforcement construction, characterized in that: The invention comprises a mobile support frame (1), wherein an adjustable support leg (2) is arranged at the bottom of the mobile support frame (1), a support arm (3) is arranged on the mobile support frame (1), a lifting plate (4) is slidably arranged on the support arm (3) via a lifting support (5), a jack positioning push rod (6) is arranged on the lifting support (5) and located on one side of the lifting plate (4), and a power device for driving the lifting support (5) to move on the support arm (3) is arranged on the mobile support frame (1).

2. A pushing device for supporting pit type static pressure pile reinforcement construction according to claim 1, characterized in that: The adjustable support leg (2) comprises a support seat, the upper end of which is provided with a threaded adjustment rod, which is threadedly connected to the bottom of the movable support frame (1).

3. A pushing device for supporting pit type static pressure pile reinforcement construction according to claim 1, characterized in that: Anchor holes (7) for fixing ground anchors are provided on the mobile support frame (1).

4. A pushing device for supporting pit type static pressure pile reinforcement construction according to claim 1, characterized in that: The lifting support (5) and the support arm (3) are connected by a screw transmission structure.

5. A pushing device for supporting pit type static pressure pile reinforcement construction according to claim 4, characterized in that: The screw transmission structure comprises: a slide groove is provided on one side of the support arm (3), a transmission screw (11) is provided in the slide groove of the support arm (3), and a driving motor (25) for driving the transmission screw (11) to rotate is provided at one end of the transmission screw (11); a slider with a threaded hole is provided at one end of the lifting support (5), the slider is provided in the slide groove on one side of the support arm (3), and the slider is meshed with the transmission screw (11) for transmission.

6. The pushing device for supporting pit type static pressure pile reinforcement construction according to claim 1, characterized in that: A guide groove is provided on one side of the support arm (3), a guide slider capable of sliding in the guide groove of the support arm (3) is provided on one side of the lifting support (5), a pulley device (8) is provided on the upper end of the support arm (3), a hoisting drive device (9) is provided on one side of the support arm (3), a hoisting drum is provided on the driving shaft of the hoisting drive device (9), a hoisting rope (12) is provided on the hoisting drum, and the hoisting rope (12) is passed around the pulley device (8) and is fixedly connected to the lifting support (5).

7. The pushing device for supporting pit type static pressure pile reinforcement construction according to claim 1 is characterized in that: A guide bracket (13) is arranged on the lifting support (5), and a jack positioning push rod (6) is arranged on the guide bracket (13).

8. The pushing device for supporting pit type static pressure pile reinforcement construction according to claim 7, characterized in that: The jack positioning push rod (6) comprises a threaded push rod (14) and a clamping and fixing rod (15), one end of the threaded push rod (14) is rotatably connected to one end of the clamping and fixing rod (15), the surface of the threaded push rod (14) is provided with threads, and the threaded push rod (14) is threadedly connected to the guide bracket (13); the surface of the clamping and fixing rod (15) is provided with threads, a locking nut (16) capable of engaging with the threads is sleeved on the clamping and fixing rod (15), a locking top block (17) is sleeved on the clamping and fixing rod (15), and the locking top block (17) is located on one side of the locking nut (16), and the other end of the clamping and fixing rod (15) is hinged with two clamping parts (18), and the two clamping parts (18) can rotate relative to the end of the clamping and fixing rod (15).

9. The pushing device for supporting pit type static pressure pile reinforcement construction according to claim 1, characterized in that: The support arm (3) adopts a telescopic support arm structure.

10. A pushing device for supporting pit type static pressure pile reinforcement construction according to claim 9, characterized in that: The support arm (3) comprises a first telescopic arm (19) and a second telescopic arm (20); one end of the first telescopic arm (19) is fixed to the mobile support frame (1); one end of the second telescopic arm (20) is an open structure; the second telescopic arm (20) is nested on the other end of the first telescopic arm (19) through the open structure; and a limiting plate (21) is provided on one side of the upper end of the second telescopic arm (20).

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