Pile pulling device for pulling out static root drilling planted pile not in place

Abstract

The pile pulling device comprises a pile feeding steel pipe, the bottom end face of the pile feeding steel pipe abuts against the top end face of the static root drilling planting pile at the upper end, a steel installation disc and a hydraulic linear driving device are fixed to the lower end in the pile feeding steel pipe, and the hydraulic linear driving device is communicated with an oil pump on the ground through two oil pipes. A big-end-up steel circular truncated cone is coaxially fixed to the free end of a piston rod of the hydraulic linear driving device, and the inner lower end of the pile feeding steel pipe is small in bottom and big in top and is matched with the steel circular truncated cone to clamp the funnel-shaped circumferential face of a plurality of anchoring steel bars reserved along the circumference in the downward pressing state of the hydraulic linear driving device. A gap capable of containing and clamping a plurality of anchoring steel bars is formed between the steel circular truncated cone and the funnel-shaped circumferential face, and the top end of the pile feeding steel pipe is a holding part which is held by a pile holding device of the pile planting machine so as to plant a fixed root-drilling planting pile or pull out the fixed root-drilling planting pile. When a plurality of static drill roots are not planted in place and cannot be planted continuously, the pile pulling device can pull out the planted piles.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation construction, in particular to a pile pulling device for pulling out static drill root piles which are not in place. Background Art

[0002] Static drill root pile is a kind of foundation pile that has been widely used in recent years. First, a pile driver with a combined drill rod of a mixing block + spiral blade is used to drill holes while spraying cement slurry to form cement soil pile holes, and then a holding and pressure pile planting equipment is used to plant piles using the self-weight of prefabricated pipe piles. Generally, one or two piles need to be welded on the ground to form a whole pile. For the needs of post-pile tensioning and anchoring, the static drill root pile at the upper end, such as the top of the prefabricated pipe pile, has multiple anchor steel bars reserved along the circumference.

[0003] In the process of static drill rooted piles, generally speaking, the depth of the cement soil pile hole is the same as the predetermined elevation of the pile. However, in the actual construction process, there are still situations where the piles are not planted in place and it is impossible to continue to plant the piles, and the pile holes need to be pulled out and the pile holes need to be re-drilled and re-sprayed with cement slurry, such as displacement or mechanical failure that delays the initial setting of the cement slurry or encounters a collapsed hole. As for the first few piles of multiple extended piles, such as the first pile of two piles and the first two piles of three piles, because the piles are connected on the ground, even if the above-mentioned situation occurs and the piles need to be pulled out, the pile holding device can be directly used to hold the next one of the two piles or the next one of the three piles or the next two static drill rooted piles, such as prefabricated pipe piles, and pull them out.

[0004] However, if multiple static drill root piles, such as the top one of two piles or the top one of three piles, have been planted below the ground but have not reached the predetermined elevation, the planted piles need to be pulled out. However, because the top static drill root pile has been pressed down by the bottom end surface of the pile delivery steel pipe and has been sent below the ground, the pile delivery steel pipe can only be lifted up to lift the pile delivery steel pipe itself and the planted pile cannot be pulled out. In this case, the existing technology is to conduct a re-examination to determine whether the planted piles that are not in place at the predetermined elevation can be used. The general result is to scrap and replace the piles. Utility Model Content

[0005] The utility model aims to solve the technical problem of providing a pile pulling device for pulling out static drill root piles that are not in place when multiple static drill root piles are not in place and can not continue to be planted. The device can pull out the planted piles through the upper static drill root piles and is used for pulling out the static drill root piles that are not in place.

[0006] The technical solution of the utility model is to provide a pile pulling device for pulling out static drill root piles that are not in place, and a plurality of anchor steel bars are reserved along the circumference of the top of the static drill root pile at the upper end; the pile pulling device comprises a pile delivery steel pipe whose bottom end face is against the top end face of the static drill root pile at the upper end, a steel mounting plate is fixed at the lower end of the pile delivery steel pipe, and a hydraulic linear drive device is fixed to the bottom surface of the steel mounting plate, and the hydraulic linear drive device is connected to the oil pump on the ground through an oil inlet pipe and an oil return pipe, and the hydraulic A steel round table with a larger upper part and a smaller lower part is coaxially fixed to the free end of the piston rod of the hydraulic linear drive device. The inner lower end of the pile-delivering steel pipe is a funnel-shaped circumferential surface with a smaller lower part and a larger upper part, and cooperates with the steel round table to clamp multiple anchor steel bars reserved along the circumference when the hydraulic linear drive device is pressed downward. There is a gap between the steel round table and the funnel-shaped circumferential surface that can accommodate and clamp multiple anchor steel bars. The top end of the pile-delivering steel pipe is a clamping part for the pile holding device of the pile driver to hold to plant static drill root piles or pull out planted static drill root piles.

[0007] After adopting the above structure, the pile pulling device of the utility model for pulling out the static drill root pile that is not in place has the following advantages:

[0008] During construction, the pile delivery steel pipe of the pile pulling device is hoisted on the ground to the top of the static drilled root pile at the upper end that has been extended, and then slowly lowered. The multiple anchoring steel bars arranged along the circumference can be inserted into the gap between the steel truncated cone and the funnel-shaped circumferential surface with manual assistance, and then the bottom end surface of the pile delivery steel pipe is pressed against the top end surface of the static drilled root pile at the upper end, and the hydraulic linear drive device such as the oil pressure jack described below is driven to press down until the multiple anchoring steel bars are clamped so that the pile delivery steel pipe and the static drilled root pile at the upper end are fixed to each other. , then hold the pile holding device of the holding and pressing type pile driver to the tightening part at the top of the pile delivery steel pipe, start the holding and pressing type pile driver to plant piles normally, if the predetermined elevation is successfully reached, start the hydraulic linear drive device such as the oil pressure jack to disengage the squeezing of multiple anchor steel bars upward so that the bottom end of the pile delivery steel pipe and the top of the static drill root pile at the top are no longer fixed to each other, then lift the pile holding device of the holding and pressing type pile driver to lift the pile delivery steel pipe above the ground, and complete the construction of the multiple static drill root piles that are butted up and down. If there is a deviation or mechanical failure that delays time and causes the cement slurry to initially set or a hole collapse occurs, when the multiple static drill root piles that are butted up and down are not planted in place and cannot continue to be planted, lift the pile holding device of the holding and pressing type pile driver to pull out the planted piles and lift them to the ground for temporary placement, then re-drill and re-spray the pile holes with cement slurry, and then hoist the planted piles into the pile holes and re-plant the piles.

[0009] During the construction of the upper static drill root pile, the pile pulling device is fixed to the upper static drill root pile such as a prefabricated pipe pile at one time, and can both plant and pull out the pile. If the pile can be planted smoothly, it can be planted normally, and if it needs to be pulled out, it can be pulled out in the opposite direction. The operation is convenient, and both the pile pulling and the pile planting are fast and efficient, avoiding scrapping and re-pile, which not only improves the construction efficiency, but also saves the cost of pile foundation construction.

[0010] Furthermore, the static drilled rooted pile at the upper end is a pile at the top of the whole pile. For example, the static drilled rooted pile at the upper end is one of the tops of two piles; or one of the tops of three piles. After adopting the above specific structure, if the multiple piles are a whole pile composed of two piles butted up and down, the pile pulling device is fixed to the top of the second pile from the bottom to the top, that is, the top pile. If the predetermined elevation is reached at one time, the whole pile is completed. If it needs to be pulled out, the whole pile is pulled out together; if the multiple piles are a whole pile composed of three piles butt-jointed up and down, the pile pulling device is fixed to the top of the third pile from the bottom to the top, that is, the top pile. If the predetermined elevation is reached at one time, the whole pile is completed. If it needs to be pulled out, the whole pile is pulled out together. It further ensures convenient operation, quick and efficient pile pulling and planting, avoids scrapping and replacing piles, improves construction efficiency and saves pile foundation construction costs.

[0011] Furthermore, the pile delivery steel pipe is divided into an upper steel pipe and a lower steel pipe of the same axis. The height dimension of the upper steel pipe is several times that of the lower steel pipe. The hydraulic linear drive device, the steel truncated cone and the funnel-shaped circumferential surface are all arranged in the lower steel pipe. The steel mounting plate is fixed on the top surface of the lower steel pipe. The outer diameter dimension of the steel mounting plate is smaller than the outer diameter dimension of the lower steel pipe. The bottom end of the upper steel pipe is fitted outside the steel mounting plate. The upper steel pipe and the lower steel pipe are welded, fixed and sealed. After adopting the above specific structure, the manufacture and installation of the pile pulling device are more convenient and faster, and the coordination between the steel truncated cone and the funnel-shaped circumferential surface is more precise, so that the pile pulling device can clamp multiple anchoring steel bars to make the pile delivery steel pipe and the static drill root pile at the upper end fixed to each other more firmly and reliably.

[0012] Furthermore, the hydraulic linear drive device is a hydraulic jack; there are two oil pipe holes on the steel mounting plate, and the two oil pipes pass through their respective oil pipe holes, extend upward in the pile delivery steel pipe, and the top ends are connected to the oil pump through two hoses. After adopting the above structure, the oil pipe is not interfered with or affected by pile planting or pile extraction, ensuring the stability, reliability and long service life of the normal operation of the hydraulic jack.

[0013] Furthermore, the outer diameter of the bottom end of the pile delivery steel pipe is larger than the outer diameter of the top end of the static drilled rooted pile at the upper end, and the inner diameter of the bottom end of the pile delivery steel pipe is smaller than the outer diameter of the top end of the static drilled rooted pile at the upper end. With the above structure, it is possible to ensure that the bottom end face of the pile delivery steel pipe and the top end face of the static drilled rooted pile such as the top end of the prefabricated pipe pile have sufficient contact and abutment areas, and the gap between the funnel-shaped circumferential surface of the inner wall of the pile delivery steel pipe and the steel truncated cone is relatively wide, making it more convenient and faster to insert multiple anchoring steel bars distributed along the circumference, and making the full height or most of the height of the steel truncated cone able to compress multiple anchoring steel bars distributed along the circumference, further ensuring the technical effect of making the pile delivery steel pipe and the static drilled rooted pile at the upper end more firmly and reliably fixed to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model when the pile pulling device and the static drill root pile at the upper end are tightly attached up and down (the static drill root pile is drawn in a way that the lower length is omitted).

[0015] Figure 2 yes Figure 1 Schematic diagram of the exploded structure (showing the unfastened state).

[0016] Figure 3 It is a schematic diagram of the structure when the steel truncated cone is matched with the funnel-shaped circular surface in the unfastened state (multiple anchor bars are omitted to show the gap and the oil pipe on the top of the steel mounting plate is omitted).

[0017] Figure 4 The schematic diagram of the positional relationship between the steel mounting plate, the hydraulic jack, the piston rod, the steel round table, the multiple anchoring steel bars and the static drill root piles at the upper end when the pile pulling device of the utility model is in a tightened state. Figure 1 (The length of the upper oil pipe is omitted).

[0018] Figure 5 The schematic diagram of the positional relationship between the steel mounting plate, the hydraulic jack, the piston rod, the steel round table, the multiple anchoring steel bars and the static drill root piles at the upper end when the pile pulling device of the utility model is in a tightened state. Figure 2 (The length of the upper oil pipe is omitted).

[0019] As shown in the figure:

[0020] 1. Static drilled root piles at the upper end, 11. Anchor steel bars;

[0021] 2. Pile pulling device, 21. Pile delivery steel pipe, 211. Upper steel pipe, 2111. Holding part, 212. Lower steel pipe, 22. Steel mounting plate, 23. Hydraulic jack, 24. Oil pipe, 25. Piston rod, 26. Steel cone, 27. Funnel-shaped circular surface, 28. Gap. DETAILED DESCRIPTION

[0022] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these specific implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each specific implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown.

[0024] The prior art static drill rooted pile is also called static drill rooted prestressed concrete bamboo pile, or static drill rooted bamboo pile, or rooted pile. To meet the needs of post-tensioning anchoring of the pile, a plurality of anchoring steel bars 11 are reserved along the circumference at the top of the static drill rooted pile 1 at the upper end.

[0025] The utility model is a pile pulling device for pulling out a static drill root pile that is not in place. The pile pulling device 2 comprises a pile delivery steel pipe 21 whose bottom end face abuts against the top end face of the static drill root pile 1 at the top end, a steel mounting plate 22 is fixed at the lower end of the pile delivery steel pipe 21, a hydraulic linear drive device such as the oil pressure jack 23 described below is fixed to the bottom surface of the steel mounting plate 22, the hydraulic linear drive device is connected to the oil pump on the ground through two oil pipes 24, namely an oil inlet pipe and an oil return pipe, and the free end of the piston rod 25 of the hydraulic linear drive device such as the oil pressure jack 23 is coaxially fixed such as welded with a steel round table 2 with a larger upper part and a smaller lower part. 6, the inner lower end of the pile delivery steel pipe 21 is a funnel-shaped circumferential surface 27 that is small at the bottom and large at the top, or large at the top and small at the bottom, and cooperates with the steel truncated platform 26 to clamp multiple anchoring steel bars 11 reserved along the circumference under the downward pressure of the hydraulic linear drive device. There is a gap 28 between the steel truncated platform 26 and the funnel-shaped circumferential surface 27 that accommodates and clamps multiple anchoring steel bars 11. The top of the pile delivery steel pipe 21 is a clamping part 2111 for the pile holding device of a pile driver such as a clamping type pile driver to hold to plant static drill root piles or pull out planted static drill root piles. It is not difficult to understand that the size of the gap 28 changes under the up and down drive of the linear drive device such as the hydraulic jack 23.

[0026] The static drilled root pile 1 at the upper end is the top of the whole pile. For example, the static drilled root pile 1 at the upper end is the top of two piles; or the top of three piles.

[0027] The pile delivery steel pipe 21 is divided into a coaxial upper steel pipe 211 and a lower steel pipe 212. The height of the upper steel pipe 211 is several times, such as 3-4 times, the height of the lower steel pipe 212. Hydraulic linear drive devices such as oil jack 23, steel truncated cone 26 and funnel-shaped circumferential surface 27 are all arranged in the lower steel pipe 212. The steel mounting plate 22 is fixed on the top surface of the lower steel pipe 212. The outer diameter of the steel mounting plate 22 is smaller than the outer diameter of the lower steel pipe 212. The bottom end of the upper steel pipe 211 is fitted outside the steel mounting plate 22. The upper steel pipe 211 and the lower steel pipe 212 are welded, fixed and sealed. It is preferred that the outer diameter of the upper steel pipe 211 of the pile delivery steel pipe 21 is equal to the outer diameter of the lower steel pipe 212.

[0028] It is not difficult to understand that coaxial fixation means that the piston rod 25 of the hydraulic linear drive device such as the oil hydraulic jack 23 is coaxial with the steel truncated cone 26, that is, the axis of the piston rod 25 of the hydraulic linear drive device such as the oil hydraulic jack 23 and the axis of the steel truncated cone 26 are on the same vertical line. The content described in the above paragraph is a preferred structure for fixing the steel mounting plate 22 and the pile delivery steel pipe 21. In addition to the structure described in the above paragraph, other structures can also be used for fixing the steel mounting plate 22 and the pile delivery steel pipe 21. For example, the pile delivery steel pipe can be a whole pipe, and the steel mounting plate, the hydraulic linear drive device such as the oil hydraulic jack and the steel truncated cone can be inserted into the pile delivery steel pipe from the bottom, and then the transverse screws are screwed into the circular pits on the outer circle of the circular steel mounting plate through multiple threaded holes provided on the circumferential outer wall to fix it. Of course, the fixing structure described in the above paragraph is preferred for fixing the steel mounting plate 22 and the pile delivery steel pipe 21.

[0029] As mentioned above, the hydraulic linear drive device is preferably an oil jack 23. There are two oil pipe through holes 221 on the steel mounting plate 22, and two oil pipes 24 pass through their respective oil pipe through holes 221, extend upward in the pile delivery steel pipe 21, such as the upper steel pipe 211, and the top ends are connected to the oil pump through two hoses. The two oil pipes 24 can be steel oil pipes, and the two steel oil pipes 24 can be spot welded and fixed on the inner wall of the pile delivery steel pipe 21, such as the inner wall of the upper steel pipe 211. The top ends of the two steel oil pipes 24 can be connected to the two hoses through pipe joints.

[0030] The outer diameter of the bottom end of the pile delivery steel pipe 21 can be larger than the outer diameter of the top end of the static drilled rooted pile 1, such as the prefabricated pipe pile at the top end, and the inner diameter of the bottom end of the pile delivery steel pipe 21 can be smaller than the outer diameter of the top end of the static drilled rooted pile 1, such as the prefabricated pipe pile at the top end. Here, "larger than" can be understood as slightly larger than, for example, the outer diameter of the bottom end of the pile delivery steel pipe 21 can be larger than the outer diameter of the top end of the static drilled rooted pile 1, such as the prefabricated pipe pile, by about 2 centimeters.

[0031] The anchoring steel bar 11 is also called reserved steel bar or tensioned steel bar. The hydraulic jack 23 is also called hydraulic jack. The piston rod 25 is also called hydraulic driving rod. The hydraulic jack 23 can also be replaced by a cylinder. A pile driver such as a clamping type pile driver is also called a clamping type hydraulic pile driver or a clamping type hydraulic pile driver. Not reaching the predetermined elevation can also be called not reaching the predetermined depth. A truncated cone is also called a "truncated cone" or a truncated cone. The pile delivery steel pipe 21 is also called a pile delivery pipe, or a steel casing or a steel pipe. The steel mounting plate 22 can also be called a circular steel mounting plate.

[0032] The above unmarked parts, structures or quantities are not shown in the drawings, and some parts are not marked in the drawings. The drawings are only for reference. If there is any inconsistency between the drawings and the text description or between the drawings, the text description shall prevail.

[0033] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pile pulling device for pulling out a static drill root pile that is not in place, wherein a plurality of anchoring steel bars are reserved along the circumference of the top of the static drill root pile at the upper end; the pile pulling device comprises a pile delivery steel pipe whose bottom end face abuts against the top end face of the static drill root pile at the upper end, and is characterized in that: A steel mounting plate is fixed to the inner lower end of the pile delivery steel pipe, and a hydraulic linear drive device is fixed to the bottom surface of the steel mounting plate. The hydraulic linear drive device is connected to the oil pump on the ground via an oil inlet pipe and an oil return pipe. A steel round table with a larger upper part and a smaller lower part is coaxially fixed to the free end of the piston rod of the hydraulic linear drive device. The inner lower end of the pile delivery steel pipe is a funnel-shaped circumferential surface which is smaller at the bottom and larger at the top, and cooperates with the steel round table to clamp multiple anchor steel bars reserved along the circumference when the hydraulic linear drive device is pressed downward. There is a gap between the steel round table and the funnel-shaped circumferential surface for accommodating and clamping multiple anchor steel bars. The top end of the pile delivery steel pipe is a clamping part for the pile holding device of the pile driver to hold to plant static drill root piles or pull out the planted static drill root piles.

2. The pile pulling device for pulling out a static drill root pile that is not in place according to claim 1 is characterized in that: The static drill root pile at the upper end is the one at the top of the entire pile.

3. The pile pulling device for pulling out a static drill root pile that is not in place according to claim 1 is characterized in that: The pile delivery steel pipe is divided into an upper steel pipe and a lower steel pipe of the same axis. The height dimension of the upper steel pipe is several times the height dimension of the lower steel pipe. The hydraulic linear drive device, the steel frustum and the funnel-shaped circular surface are all arranged in the lower steel pipe. The steel mounting plate is fixed on the top surface of the lower steel pipe. The outer diameter dimension of the steel mounting plate is smaller than the outer diameter dimension of the lower steel pipe. The bottom end of the upper steel pipe is sleeved on the outside of the steel mounting plate. The upper steel pipe and the lower steel pipe are welded, fixed and sealed.

4. The pile pulling device for pulling out a static drill root pile that is not in place according to claim 1, characterized in that: The hydraulic linear drive device is a hydraulic jack; there are two oil pipe through holes on the steel mounting plate, and the two oil pipes pass through their respective oil pipe through holes, extend upward in the pile delivery steel pipe, and the top end is connected to the oil pump through two hoses.

5. The pile pulling device for pulling out a static drill root pile that is not in place according to any one of claims 1 to 4, characterized in that: The outer diameter of the bottom end of the pile delivery steel pipe is larger than the outer diameter of the top end of the static drilled root pile at the upper end, and the inner diameter of the bottom end of the pile delivery steel pipe is smaller than the outer diameter of the top end of the static drilled root pile at the upper end.

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