A new type of pipe pile structure

Abstract

The utility model discloses a novel pipe pile structure and superdeep large diameter pipe pile hoisting process relates to civil engineering foundation engineering field. The pipe pile structure includes prefabricated pipe pile, two rows of hoisting hole that interval 50mm is arranged along the axial direction, steel bar, steel wire rope, safety pin and hoop, and the specification of prefabricated pipe pile is PHC800AB130 or PHC1000AB130, and steel bar diameter is 55mm, and steel wire rope material is 6*37M+FC, and safety pin is 3mm ordinary steel wire, and the hoop can be provided with stiffened plate. When hoisting, the first row hoisting hole inserts steel bar, and the ring embrace steel wire rope between two rows of hoisting holes, when fixing, the second row hoisting hole inserts steel bar, and the hoop is sleeved below the second row hoisting hole. Process selects 150t crawler crane, and the steps including equipment selection, hoisting hole deepening design, hoisting operation, pile hole in position fixation, pile welding etc. are suitable for the non - soil squeezing pile deep pile foundation engineering of crossing superdeep miscellaneous fill layer, rotary digging guide hole to design bearing stratum, can solve the superdeep large diameter pipe pile hoisting safety and hoisting weight adaptation problem.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering foundation engineering technology, specifically to a novel pipe pile structure. Background Technology

[0002] Ultra-deep, large-diameter pipe piles have a heavy self-weight (the maximum lifting weight of a single section is 76t). Conventional hoisting equipment has insufficient rated lifting capacity, which cannot meet the lifting weight requirements and is difficult to adapt to construction.

[0003] Conventional pipe pile hoisting only uses steel wire ropes to wrap around the outer wall of the pipe pile, without effective anti-slip measures. When hoisting ultra-deep and large-diameter pipe piles, the steel wire ropes are prone to slippage, posing a safety risk of the pipe pile falling. Utility Model Content

[0004] To address the aforementioned technical issues, this application resolves the problem that the self-weight of ultra-deep, large-diameter pipe piles (with a maximum lifting weight of 76t per section) is insufficient for the rated lifting capacity of conventional hoisting equipment, making it difficult to meet the lifting weight requirements and adapt to construction.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a novel pipe pile structure, including a precast pipe pile, lifting holes, steel bars, steel wire ropes, safety pins and clamps, wherein two rows of lifting holes are radially opened through the top outer peripheral wall of the precast pipe pile and spaced apart along the axial direction.

[0006] When hoisting the pipe pile, steel bars are inserted into the hoisting holes in the first row at the top of the precast pipe pile, and steel wire ropes are wrapped around the top outer peripheral wall of the precast pipe pile located between the hoisting holes in the first row and the hoisting holes in the second row.

[0007] When fixing the pipe piles, steel bars are inserted into the lifting holes in the second row at the top of the precast pipe piles, and a clamp is fitted onto the top outer peripheral wall of the precast pipe pile below the second row of lifting holes; wherein...

[0008] Both ends of the steel bar have a pin hole that extends radially through the outer peripheral wall.

[0009] When a steel bar is inserted into the hoisting hole of the first row at the top of the precast pipe pile, or into the hoisting hole of the second row at the top of the precast pipe pile, a safety pin is inserted into the pin hole.

[0010] To better realize this utility model, the clamp is further composed of two symmetrical clamp bodies and two bolts. The two ends of one clamp body are respectively connected to the two ends of the other clamp body and fixed by bolts.

[0011] To better realize this utility model, a stiffening plate is further provided on the outer side of the clamp.

[0012] To better realize this utility model, the precast pipe pile is further specified as PHC800AB130 or PHC1000AB130.

[0013] To better realize this utility model, the axial distance between the lifting holes in the first row and the lifting holes in the second row is 50mm.

[0014] To better realize this utility model, the diameter of the steel bar is 55mm, and its length is the outer diameter of the precast pipe pile + 200mm.

[0015] To better realize this utility model, the steel wire rope is made of 6*37M+FC material, grade 1770, and safety factor 6.

[0016] To better realize this utility model, the safety pin is further specified as being made of 3mm ordinary steel wire.

[0017] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0018] 1. In this utility model, the first row of lifting holes + steel bars (with 3mm safety pins) + two strands of 39mm steel wire ropes (6*37M+FC material, safety factor 6) prevent the steel wire ropes from slipping during lifting. The steel wire ropes are wrapped around the lower side of the steel bars, and the steel bars are fixed in the lifting holes by safety pins to limit the axial displacement of the steel wire ropes. This avoids the risk of falling due to the slippage of the steel wire ropes during the lifting of the pipe piles, ensuring that the lifting operation is safe and controllable. For example, there was no slippage problem when lifting pipe piles weighing more than 70t in the Weiyuan Standard Factory Building Project.

[0019] 2. In this utility model, the second row of lifting holes + steel bars (with 3mm safety pins) + two-lobed bolt fixing clamps (with stiffening plates) prevent the pipe pile from falling during fixing. The clamps tighten the outer wall of the pipe pile, and the steel bars above the clamps form a secondary protection to offset the effect of slight loosening of the clamps. When the steel wire rope is loosened after the pipe pile is in place, it will not fall into the pile hole due to the loosening of the clamps, thus ensuring the stability of the position and quality safety of the pipe pile before pile formation.

[0020] 3. In this utility model, the SCC1500A-2 crawler crane (rated lifting capacity 150t, boom 40-76m) is selected to meet the lifting weight and height requirements of ultra-deep large-diameter pipe piles, covering the maximum lifting weight of a single pipe pile of 76t (with reserved safety redundancy). The boom length matches the total height requirement of ≤17m pile length above ground + <20m sling, avoiding equipment overload, preventing construction restrictions due to insufficient lifting height, and ensuring the stability of segmented lifting of ultra-deep (maximum 94m) pipe piles.

[0021] 4. In this utility model, the lifting hole is designed with a detailed design (Φ60mm reserved sleeve, two rows of symmetrical distribution, hole spacing of 50mm + pipe pile reinforcing bars), which enhances the structural strength of the pipe pile lifting part, matches the steel bar diameter (55mm) to ensure smooth installation, and strengthens the stress performance around the lifting hole with reinforcing bars to prevent the pipe pile from cracking due to concentrated stress during lifting, reduce the risk of subsequent lifting caused by prefabrication defects (such as hole diameter deviation, weak welding of reinforcing bars), and ensure the structural integrity of the pipe pile. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the pipe pile hoisting in Embodiment 1 of this utility model;

[0024] Figure 2 This is a schematic diagram showing the fit between the precast pipe pile, steel bar, and safety pin in Embodiment 1 of this utility model;

[0025] Figure 3 This is a schematic diagram of the overall structure for fixing the pipe pile in Embodiment 1 of this utility model;

[0026] Figure 4 This is a schematic diagram of the clamp and bolt assembly in Embodiment 1 of this utility model;

[0027] Figure 5 This is a schematic diagram of the fit between the clamp and the stiffening plate in Embodiment 2 of this utility model.

[0028] Explanation of reference numerals in the attached drawings: 101-Precast pipe pile; 102-Lifting hole; 103-Steel bar; 104-Steel wire rope; 105-Safety pin; 106-Clamp; 107-Bolt; 108-Stiffening plate. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0034] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] Example 1

[0036] like Figures 1 to 4 As shown, a novel pipe pile structure includes a precast pipe pile 101, a lifting hole 102, a steel bar 103, a steel wire rope 104, a safety pin 105, and a clamp 106. The top outer peripheral wall of the precast pipe pile 101 is radially opened with two rows of lifting holes 102 arranged at intervals along the axial direction.

[0037] like Figure 1 As shown, when the pipe pile is hoisted, a steel bar 103 is inserted into the hoisting hole 102 in the first row at the top of the precast pipe pile 101, and a steel wire rope 104 is wrapped around the top outer peripheral wall of the precast pipe pile 101 between the first row of hoisting holes 102 and the second row of hoisting holes 102.

[0038] like Figure 3 As shown, when fixing the pipe pile, a steel rod 103 is inserted into the lifting hole 102 in the second row at the top of the precast pipe pile 101, and a clamp 106 is fitted onto the top outer peripheral wall of the precast pipe pile 101 below the second row of lifting holes 102; wherein,

[0039] Both ends of the steel rod 103 have a pin hole that extends radially through the outer peripheral wall.

[0040] When a steel rod 103 is inserted into the hoisting hole 102 in the first row at the top of the precast pipe pile 101, or into the hoisting hole 102 in the second row at the top of the precast pipe pile 101, a safety pin 105 is inserted into the pin hole.

[0041] like Figure 4 As shown, in this embodiment, the clamp 106 consists of two symmetrical clamp bodies and two bolts. The two ends of one clamp body are respectively connected to the two ends of the other clamp body and fixed by bolts 107.

[0042] like Figures 1 to 4 As shown, in this embodiment, the precast pipe pile 101 has the specification of PHC800AB130 or PHC1000AB130.

[0043] like Figures 1 to 4 As shown, in this embodiment, the axial distance between the first row of lifting holes 102 and the second row of lifting holes 102 is 50mm.

[0044] like Figures 1 to 4 As shown, in this embodiment, the diameter of the steel rod 103 is 55mm, and its length is the outer diameter of the precast pipe pile 101 + 200mm.

[0045] like Figures 1 to 4 As shown, in this embodiment, the steel wire rope 104 is made of 6*37M+FC material, with a grade of 1770 and a safety factor of 6.

[0046] like Figures 1 to 4 As shown, in this embodiment, the safety pin 105 is made of 3mm ordinary steel wire.

[0047] Working principle:

[0048] 1. Selection of hoisting equipment

[0049] First, based on the specifications of the pipe pile material specified in the construction drawings (e.g., PHC800AB130 / PHC1000AB130) and the geological conditions explored in the geological survey data, determine the key parameters after the pipe pile is completed:

[0050] Estimated pile length: Maximum 94m (segmented hoisting and splicing).

[0051] Maximum lifting capacity: 76t (lifting load corresponding to the maximum self-weight of a single pipe pile).

[0052] Based on the above calculation parameters, the SCC1500A-2 crawler crane is selected as the lifting equipment, and its core parameters must meet the following requirements:

[0053] Rated lifting capacity: 150t (covering a maximum lifting capacity of 76t, with a safety margin).

[0054] Crane boom length: 40-76m (matching hoisting height requirements: single section of pipe pile maximum 15m + exposed pile length at borehole ≤ 2m = pile length above ground ≤ 17m, stacked sling length < 20m, total height < 37m, crane boom length must be greater than this total height to avoid hoisting height limitation).

[0055] Operational stability: It must meet the anti-overturning requirements during the hoisting of ultra-deep, large-diameter pipe piles to ensure that there is no risk of equipment displacement during the hoisting process.

[0056] Confirm the matching relationship between the crane's boom length, working radius, and lifting capacity: Under the working conditions of a maximum lifting capacity of 76t, a pile length of 17m above ground, and a sling length of 20m, the selected boom length (for example, boom length of 40-76m) can cover the actual lifting height, and the rated lifting capacity of 150t can meet the load requirements and avoid equipment overload.

[0057] 2. Detailed design of precast pipe pile 101 lifting hole and 102.

[0058] Establish a dedicated communication channel with the manufacturer of precast pipe piles 101 to clarify the design requirements for the lifting hole 102. This requires consideration of the pipe pile specifications (PHC800AB130 / PHC1000AB130) and single section length (6m / 7m / 8m / 9m / 10m / 11m / 12m / 13m / 14m / 15m) to ensure that the position of the lifting hole 102 matches the structural strength of the pipe pile.

[0059] The manufacturer is required to fabricate the following structures on the side where the pipe pile is hoisted:

[0060] The reserved sleeve (i.e., the steel rod is fitted inside the reserved sleeve, with both ends of the steel rod extending out of the reserved sleeve; the reserved sleeve is fitted inside the lifting hole, with both ends of the reserved sleeve extending out of the lifting hole, and the length of the reserved sleeve is less than the length of the steel rod to avoid interfering with the insertion and mating of the safety pin and the steel rod): diameter Φ60mm, which must match the diameter of the steel rod 103 used later (e.g., the diameter Φ of steel rod 103 is 55mm) to ensure that steel rod 103 can be smoothly inserted;

[0061] Lifting Hole 102: Two rows are set with a hole spacing of 50mm. The holes must be symmetrically distributed to ensure that the pipe pile is subjected to balanced force during lifting.

[0062] Reinforcing ribs: These are designed and manufactured by the manufacturer based on the weight of a single section of the pipe pile and the stress requirements of hoisting, to strengthen the structural strength of the pipe pile around the hoisting hole 102 and prevent the pipe pile from cracking during hoisting.

[0063] Before the pipe piles leave the factory, the dimensions of the lifting holes (e.g., hole diameter, spacing), the reserved sleeve positions, and the welding quality of the reinforcing ribs must be checked to ensure that they meet the requirements of the lifting process and avoid the risk of subsequent lifting due to prefabrication defects.

[0064] 3. Lifting and hoisting preparation and operation

[0065] Prepare lifting rigging and safety components according to the following specifications, ensuring that the components meet the performance standards:

[0066] Steel Wire Rope 104: Select 39mm diameter two-strand steel wire rope 104, material is 6*37M+FC, grade 1770, the breaking tensile force must match the maximum lifting capacity of 76t and the safety factor of 6 (i.e., safety factor = breaking tensile force / actual force, to ensure no risk of breakage).

[0067] Steel bar 103: Diameter Φ55mm, length is "pipe pile diameter + 200mm", the material must have sufficient rigidity, it is only used as an anti-slip insurance measure and is not included in the stress calculation;

[0068] Safety pin 105: Made of 3mm ordinary steel wire, used to fix steel bar 103 and prevent steel bar 103 from falling out of the lifting hole 102.

[0069] Insert the steel bar 103 into the hoisting hole 102 at the top of the pipe pile end, ensuring that the steel bar 103 completely passes through the two rows of hoisting holes 102 and that the exposed length at both ends is the same.

[0070] Insert a 3mm ordinary steel wire safety pin 105 into the safety pin hole at the exposed end of the steel bar 103, and tighten both ends of the wire to prevent the steel bar 103 from slipping out of the hole during hoisting.

[0071] Two 39mm steel wire ropes 104 are wrapped around the outer wall of the pipe pile under the steel bar 103 to ensure that the steel wire ropes 104 are in close contact with the outer wall of the pipe pile. The lifting force is borne by the friction between the steel wire ropes 104 and the outer wall of the pipe pile.

[0072] Operate a 150t crawler crane to slowly lift wire rope 104. During the lifting process, the wire rope 104 will gradually tighten around the pipe pile under the force to prevent the pipe pile from shaking.

[0073] When the pipe pile is lifted to 30cm off the ground, the lifting is paused and the condition of the steel bar 103, safety pin 105 and wire rope 104 is checked: confirm that the steel bar 103 is not loose, the safety pin 105 is not detached, and the wire rope 104 is not deviated. After confirming that there are no problems, the lifting continues and the pipe pile is lifted to the top of the pile hole.

[0074] 4. Pile hole positioning and fixing

[0075] Operate the crane to slowly lower the pipe pile, aligning it with the center of the pile hole. During the lowering process, the speed must be controlled to avoid collision between the pipe pile and the pile hole wall.

[0076] When the pile tip approaches the predetermined position at the bottom of the pile hole, slow down the lowering speed to ensure that the pile end plate makes stable contact with the bottom of the hole.

[0077] Using existing mature clamps (meeting the load-bearing capacity requirements, and the clamping force must ensure that the pipe pile does not slip under the maximum self-weight of 76t), the clamps are placed around the upper part of the pipe pile near the pile end, and the clamping mechanism is activated to make the clamps fit tightly against the outer wall of the pipe pile.

[0078] Check the clamping condition: Visually inspect the fit between the clamp and the pipe pile, and tap the clamp with a tool to confirm that there is no looseness, ensuring that the pipe pile is firmly fixed.

[0079] Insert a Φ55mm steel rod 103 into the lifting hole 102 at the lower part (second row) of the pile end, repeat the installation operation of the safety pin 105, and fix the steel rod 103 with 3mm ordinary steel wire.

[0080] After confirming that the lower steel bar 103 is fixed in place and that the existing mature clamps are tightened, slowly loosen the two 39mm steel wire ropes 104 at the top. During the loosening process, the condition of the pipe pile needs to be continuously observed to prevent the pipe pile from falling into the pile hole due to slight loosening of the clamps.

[0081] After the steel wire rope 104 is completely loosened, it is removed from the outer wall of the pipe pile to complete the positioning and fixing of the pipe pile.

[0082] 5. Welding and pile driving operations

[0083] If pile splicing is required (since the maximum pile length is 94m, multiple pipe pile sections need to be connected, and the existing pile splicing method can be used), hoist the next pipe pile section above the already positioned pipe pile according to the process of steps 3-4, so that the end plates of the two pipe pile sections are aligned and the gap is controlled within the allowable range of the specifications;

[0084] The end plate should be welded using existing and mature welding methods. The welding method must comply with the pipe pile connection specifications to ensure that the weld is full and free of defects. During the welding process, it is necessary to prevent weld slag from falling into the pile hole.

[0085] After welding, wait 8 minutes for cooling to ensure that the strength of the end plate weld meets the standard (the tensile strength of the weld after cooling must meet the requirement that there is no risk of cracking during the pile driving process). It is strictly forbidden to carry out pile driving operation before the cooling is complete.

[0086] After cooling is complete, slowly release the existing clamps, and observe whether the pipe pile shifts during the release process;

[0087] Operate the crane or pile driving equipment to control the pile driving at a speed of 1m / min. This speed can prevent the pile from impacting the bottom of the pile hole or the surrounding soil, and avoid pile displacement or damage to the pile body.

[0088] After the pile is driven to the predetermined depth, if it is necessary to continue splicing the pile, repeat steps 3-5 until the entire pile is welded and driven to the design depth.

[0089] This process is only applicable to precast pipe pile foundation projects of non-displacement piles and precast pipe piles 101 deep piles that penetrate ultra-deep miscellaneous fill layers and reach the design bearing layer through rotary drilling. It is not applicable to the construction of displacement piles in soft foundations or silty soils using conventional hammer driving or static pressure driving, to avoid hoisting or pile driving quality problems caused by mismatched geological conditions.

[0090] Example 2

[0091] Example 2 is the same as Example 1 in other aspects, except that, as Figure 5 As shown, a stiffening plate 108 is provided on the outer side of the clamp 106.

[0092] It is worth noting that this utility model mainly addresses the technical problems in the background section. The specification clearly describes the targeted core technical means designed to solve the technical problem, and fully elaborates on the specific process by which the core technical means acts on the technical problem, as well as the logical link through which the core technical means ultimately produces innovative and beneficial effects, clearly presenting the correspondence between "technical problem - technical means - technical effect".

[0093] The following is a detailed explanation of the two scenarios in this embodiment that are unrelated to the core solution of this utility model:

[0094] 1. Other technical problems not intended to be solved by this utility model: Such technical problems are not included in the protection scope of this utility model, and the corresponding technical means belong to the category of existing mature technology. Those skilled in the art can directly obtain and apply the corresponding technical means to solve other technical problems not intended to be solved by this utility model based on common knowledge (such as conventional design methods commonly used in the industry) or published existing technical documents (such as authorized patents, technical manuals, academic papers, etc.). Whether or not this part is disclosed does not affect the full disclosure of the technical solution of this utility model itself.

[0095] 2. New technical problems arising during the application of the present utility model: If new technical problems arise during the application of the present utility model, and this application does not provide a targeted further optimization solution, it is assumed that those skilled in the art can directly solve the new technical problems arising during the application of the present utility model by selecting appropriate conventional technical means based on common knowledge or existing technical literature. There is no situation where the core technical solution of the present utility model cannot be implemented because the technical means for the derived problem are not mentioned in this application.

[0096] Regarding the performance and parameters of the parts involved in this utility model's technical solution, the specification has clearly defined their core functional requirements. Those skilled in the art, combining conventional specifications in mechanical design (such as GB / T series national standards), parts selection manuals (such as industry-standard hardware and transmission component parameter manuals), and conventional installation and debugging experience, can reasonably determine and debug the specific performance indicators and parameter values ​​that meet the above functional requirements. This does not rely on "the special experience of the operator," and there is no problem of the technical solution being unachievable due to malfunctions caused by unclear part performance or parameters, or by special extreme limiting conditions.

[0097] The above description is merely a preferred embodiment of this application and is not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A novel pipe pile structure, characterized in that: It includes precast pipe piles (101), lifting holes (102), steel bars (103), steel wire ropes (104), safety pins (105) and clamps (106). The top outer peripheral wall of the precast pipe piles (101) is radially opened with two rows of lifting holes (102) arranged at intervals along the axial direction. When the pipe pile is hoisted, a steel rod (103) is inserted into the hoisting hole (102) in the first row at the top of the precast pipe pile (101). A steel wire rope (104) is wrapped around the top outer peripheral wall of the precast pipe pile (101) between the hoisting hole (102) in the first row and the hoisting hole (102) in the second row. When fixing the pipe pile, a steel rod (103) is inserted into the second row of lifting holes (102) at the top of the precast pipe pile (101), and a clamp (106) is fitted on the top outer peripheral wall of the precast pipe pile (101) below the second row of lifting holes (102); wherein, Both ends of the steel rod (103) have a pin hole that extends radially through the outer peripheral wall. When a steel rod (103) is inserted into the hoisting hole (102) of the first row at the top of the precast pipe pile (101), or a steel rod (103) is inserted into the hoisting hole (102) of the second row at the top of the precast pipe pile (101), a safety pin (105) is inserted into the pin hole.

2. The novel pipe pile structure according to claim 1, characterized in that: The clamp (106) consists of two symmetrical clamp bodies and two bolts. The two ends of one clamp body are respectively connected to the two ends of the other clamp body and fixed by bolts (107).

3. The novel pipe pile structure according to claim 2, characterized in that: A stiffening plate (108) is provided on the outer side of the clamp (106).

4. The novel pipe pile structure according to claim 3, characterized in that: The specifications of the precast pipe pile (101) are PHC800AB130 or PHC1000AB130.

5. A novel pipe pile structure according to claim 4, characterized in that: The axial distance between the lifting holes (102) in the first row and the lifting holes (102) in the second row is 50 mm.

6. A novel pipe pile structure according to claim 5, characterized in that: The steel bar (103) has a diameter of 55 mm and a length of outer diameter of the precast pipe pile (101) + 200 mm.

7. A novel pipe pile structure according to claim 6, characterized in that: The steel wire rope (104) is made of 6*37M+FC material, grade 1770, and has a safety factor of 6.

8. A novel pipe pile structure according to claim 7, characterized in that: The safety pin (105) is made of 3mm ordinary steel wire.

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