Prestressed pipe pile long spiral guide hole grouting and dead weight type pile planting construction equipment

Abstract

The present application relates to the technical field of prestressed pipe pile, and discloses a prestressed pipe pile long spiral guide hole grouting and dead weight type pile planting construction equipment, which comprises a long spiral drill rod, a grouting pump, an air compressor, a shovel and a vibrating hammer. The long spiral drill rod is connected with a power head for driving the long spiral drill rod to rotate. In the process of driving, the air compressor injects high-pressure gas into the pile hole, and in the process of lifting the long spiral drill rod driven by the power head, the grouting pump injects slurry in the slurry storage barrel into the pile hole. When the long spiral drill rod is separated from the pile hole and the slurry of a set depth is injected into the pile hole, the shovel hoists the prestressed pipe pile into the pile hole and separates from the prestressed pipe pile. The prestressed pipe pile sinks in the pile hole by using its own gravity. After the prestressed pipe pile sinks to a set depth in the pile hole, the vibrating hammer vibrates and presses the prestressed pipe pile until the pipe pile is embedded to a set depth. After the slurry solidifies, the pile is formed. In this way, the construction quality requirement is ensured, and the efficient, reliable and economical effect is achieved.

Description

Technical Field

[0001] This invention patent relates to the technical field of prestressed pipe piles, and more specifically, to a prestressed pipe pile long spiral pre-hole grouting and self-weight pile planting construction equipment. Background Technology

[0002] Prestressed concrete pipe piles have advantages such as convenient construction, high efficiency in pile formation, and convenient on-site management, and are widely used in foundation engineering.

[0003] The construction techniques for prestressed concrete pipe piles include static pressure method and hammer driving method. In actual construction, to reduce the amount of pipe pile driven, construction is usually carried out within the foundation pit. When the project is located in a densely built-up area, the static pressure method is preferred due to the high noise level of hammer driving. However, when working at the bottom of the foundation pit, the construction of prestressed concrete pipe piles within approximately 4 meters of the pit edge is not possible due to the size limitations of the static pressure pipe pile machine.

[0004] In existing technologies, when constructing edge piles within approximately 4 meters of the foundation pit edge, the static pressure pipe pile machine cannot operate normally due to the close proximity of the edge piles to the support piles. Only edge pile drivers can be used, but their pressure values ​​are too low to meet design requirements and cannot achieve the designed bearing capacity. Alternatively, the edge piles can be replaced with rotary-drilled cast-in-place piles, but considering that designing two pile types for the same foundation cap or foundation is not conducive to foundation stress, and that rotary-drilled cast-in-place piles require the pile tip to be inserted into moderately or slightly weathered rock, this significantly increases drilling costs. Therefore, there is a problem that edge piles within approximately 4 meters of the foundation pit edge are difficult to construct. Summary of the Invention

[0005] The purpose of this invention is to provide a prestressed pipe pile long spiral pre-drilling grouting and self-weight pile planting construction equipment, which aims to solve the problem in the prior art that it is difficult to construct the edge piles within about 4m from the edge of the foundation pit during the construction of prestressed pipe piles.

[0006] The present invention is implemented as follows: a prestressed pipe pile long spiral pre-hole grouting and self-weight pile planting construction equipment includes a long spiral drill rod for drilling into the soil layer to form a pile hole, a grouting pump connected to a grout storage tank containing grout, an air compressor, a bucket for hoisting the prestressed pipe pile into the pile hole, and a vibratory hammer for vibrating and pressing the prestressed pipe pile in the pile hole so that the lower part of the prestressed pipe pile is embedded in the bearing layer.

[0007] The long spiral drill rod is connected to a power head that drives the long spiral drill rod to rotate. During the process of the power head driving the long spiral drill rod to drill in the soil, the air compressor injects high-pressure gas into the pile hole. During the process of the power head driving the long spiral drill rod to lift the pile hole, the grouting pump injects the grout from the grout storage tank into the pile hole.

[0008] When the long spiral drill rod leaves the pile hole and grout of a set depth is injected into the pile hole, the bucket lifts the prestressed pipe pile into the pile hole and then leaves the prestressed pipe pile. The prestressed pipe pile sinks in the pile hole by its own weight. After the prestressed pipe pile sinks to the set depth in the pile hole, the vibratory hammer vibrates and presses the prestressed pipe pile.

[0009] Optionally, the power head is connected to a long spiral pile driver, which has a vertically arranged frame, and the power head is movably connected to the frame.

[0010] During the forward drilling process of the long spiral drill rod driven by the power head in the soil layer, the power head moves downward along the frame. During the reverse lifting process of the long spiral drill rod driven by the power head in the pile hole, the power head moves upward along the frame.

[0011] Optionally, the long spiral drill rod has a drill bit at the top and a rod cavity with a top opening in the long spiral drill rod, the rod cavity extending along the axial direction of the long spiral drill rod; the drill bit has multiple nozzles, the nozzles communicating with the rod cavity;

[0012] The top opening of the long spiral drill rod is connected to the grouting pump and the air compressor via connecting pipes. During the reverse lifting process of the long spiral drill rod driven by the power head from the pile hole, the grouting pump pumps the grout from the storage tank into the rod cavity and injects it into the pile hole through the nozzle. During the forward drilling process of the long spiral drill rod driven by the power head in the soil layer, the air compressor injects high-pressure gas into the rod cavity, and the high-pressure gas is injected into the pile hole through the nozzle.

[0013] Optionally, the drill bit is cone-shaped with a smaller bottom and a larger top. The outer periphery of the drill bit has multiple drill teeth arranged in a spiral pattern along the outer periphery of the drill bit. The outer periphery of the drill bit has a spiral wall located between the multiple drill teeth, and the spiral wall is arranged spirally along the outer periphery of the drill bit.

[0014] Optionally, a plurality of the nozzles are formed on the spiral wall and are spaced apart along the spiral direction of the spiral wall.

[0015] Optionally, the inner end of the connecting pipe is connected to the long spiral drill rod, and the outer end of the connecting pipe is connected to a three-way connector. The three-way connector is connected to an air pipe and a grout pipe respectively. The air pipe is connected to an air compressor, and the grout pipe is connected to a grouting pump. An air pipe valve is provided on the air pipe, and a grout valve is provided on the grout pipe.

[0016] Optionally, the bucket is connected to the prestressed pipe pile via a hoisting structure. The front end of the bucket has shovel teeth, and the rear end of the bucket has a hook. The hoisting structure includes a hoisting strap. One end of the hoisting strap is provided with a fixed end, which forms a through hole. The other end of the hoisting strap is provided with a connecting end, which forms a connecting hole.

[0017] The lifting sling is wrapped around the outer periphery of the prestressed concrete pipe pile, and the other end of the lifting sling passes through the through hole. The lifting sling is wrapped around the outer periphery of the prestressed concrete pipe pile to form an enclosing ring.

[0018] When the bucket lifts the prestressed pipe pile, the shovel teeth are inserted into the connecting hole, the enclosing ring is tightened, and the enclosing ring is fixed relative to the prestressed pipe pile; when the prestressed pipe pile sinks in the pile hole, the shovel teeth disengage from the connecting hole, the enclosing ring is relaxed, and the lifting belt is movably arranged with the prestressed pipe pile.

[0019] Optionally, the lifting sling is equipped with a connecting belt. When the bucket lifts the prestressed pipe pile, the shovel teeth connect with the connecting hole, and the hook connects with the connecting belt. When the prestressed pipe pile sinks in the pile hole, the shovel teeth disengage from the connecting hole, and the hook moves upward relative to the prestressed pipe pile with the lifting sling.

[0020] Optionally, the other end of the lifting sling passes through the through hole and has an extension extending to the outside of the enclosing ring; the connecting sling is movably connected to the lifting sling and is connected to the middle of the enclosing ring; the extension and the connecting sling are arranged opposite to each other and are respectively arranged on both sides of the prestressed pipe pile.

[0021] Optionally, the vibratory hammer compresses the prestressed pipe pile through a pile driver; the prestressed pipe pile has a hollow pipe hole, and the top of the prestressed pipe pile has an upward-facing top annular surface that surrounds the outer periphery of the top opening of the pipe hole; the bottom of the pile driver has a downward-facing, inverted conical bottom end, the outer periphery of which has an outer peripheral wall, and the bottom end is inclined outwards along the direction from bottom to top.

[0022] An inner limiting post extends downward from the middle of the bottom end, and an outer limiting ring extends downward from the bottom of the pile driver, the outer limiting ring surrounding the outer periphery of the bottom end; multiple positioning blocks are sleeved on the outer periphery of the prestressed pipe pile, the multiple positioning blocks are spaced around the circumference of the prestressed pipe pile; when the prestressed pipe pile is lowered into the pile hole, the multiple positioning blocks abut against the inner sidewall of the pile hole to align the prestressed pipe pile with the center of the pile hole;

[0023] The bottom of the pile driver abuts against the top of the prestressed pipe pile. The inner limiting column and the lower part of the bottom end are both embedded in the pipe hole. The inner side of the top ring abuts against the outer peripheral wall. The outer limiting ring is sleeved on the outer periphery of the prestressed pipe pile.

[0024] Compared with the prior art, the prestressed pipe pile long spiral pre-drilling grouting and self-weight pile planting construction equipment provided by the present invention effectively solves the problem of difficult construction of side piles close to the edge of the foundation pit by means of the above equipment and according to the following construction sequence and construction structure. Specifically, the long spiral drill rod is used to drill at the construction position to form a pile hole. During the process of lifting the long spiral drill rod, the grouting pump injects the grout in the storage tank into the pile hole. After the grout reaches the set amount, the prestressed pipe pile is lifted. Then, the bucket is connected to the prestressed pipe pile through the connecting structure and then disconnected, so that the prestressed pipe pile is implanted into the pile hole by its own weight. Then, the prestressed pipe pile is embedded into the bearing layer by the vibratory hammer. After the grout solidifies, the pile is formed.

[0025] In this way, the grout in the storage tank is fully infiltrated into the hole wall and bottom by the grouting pump to form a cement-soil pile, which is then organically combined with the subsequently implanted prestressed pipe pile to form a cement-soil composite prestressed pipe pile with high bearing capacity. This effectively solves the problem of the difficulty in constructing edge piles that are close to the edge of the foundation pit. Moreover, the process is continuous, fast and compact, with high pile planting efficiency and good pile quality. Overall, it has the characteristics of high efficiency, reliability and economy. Attached Figure Description

[0026] Figure 1 This is a construction schematic diagram of the power head driving the long spiral drill rod for drilling provided by the present invention;

[0027] Figure 2 This is a construction schematic diagram of the power head driving the long spiral drill rod to lift in the pile hole, provided by the present invention;

[0028] Figure 3 This is a partial schematic diagram of the bottom of the drill bit provided by the present invention;

[0029] Figure 4 This is a construction schematic diagram of the prestressed pipe pile provided by the present invention using a vibratory hammer.

[0030] Figure 5 This is a front view schematic diagram of the prestressed pipe pile after construction by vibratory hammer pressing provided by the present invention;

[0031] Figure 6 This is a front view schematic diagram of the arrangement structure between the hoisting belt, connecting belt, bucket and prestressed pipe pile provided by the present invention;

[0032] Figure 7 This is a three-dimensional schematic diagram of the bucket provided by the present invention;

[0033] Figure 8 This is a three-dimensional schematic diagram of the lifting sling provided by the present invention;

[0034] Figure 9 This is a cross-sectional schematic diagram of the connection between the pile driver and the prestressed pipe pile provided by the present invention. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0036] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0037] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this invention and 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0038] Reference Figure 1-9 The image shown is a preferred embodiment of the present invention.

[0039] The prestressed pipe pile long spiral pre-hole grouting and self-weight pile planting construction equipment provided by the present invention includes a long spiral drill rod 100 for drilling into the soil to form a pile hole, a grouting pump 410 connected to a grout storage tank 420 containing grout 20, an air compressor 310, a bucket 900 for hoisting the prestressed pipe pile 500 into the pile hole, and a vibratory hammer 600 for vibrating and pressing the prestressed pipe pile 500 in the pile hole so that the lower part of the prestressed pipe pile 500 is embedded in the bearing layer 30.

[0040] A power head 110 is connected to the long spiral drill rod 100 to drive the long spiral drill rod 100 to rotate. During the process of the power head 110 driving the long spiral drill rod 100 to drill in the soil, the air compressor 310 injects high-pressure gas into the pile hole. During the process of the power head 110 driving the long spiral drill rod 100 to lift the pile hole, the grouting pump 410 injects the grout 20 in the grout storage tank 420 into the pile hole.

[0041] When the long spiral drill rod 100 leaves the pile hole and the grout 20 is injected into the pile hole to a set depth, the bucket 900 lifts the prestressed pipe pile 500 into the pile hole and then leaves the prestressed pipe pile 500. The prestressed pipe pile 500 sinks in the pile hole by its own weight. After the prestressed pipe pile 500 sinks to the set depth in the pile hole, the vibratory hammer 600 vibrates and presses the prestressed pipe pile 500.

[0042] The prestressed pipe pile long spiral pre-drilling grouting and self-weight pile planting construction equipment provided above effectively solves the problem of difficult construction of side piles close to the edge of the foundation pit 10 by using the above equipment and following the construction sequence and construction structure. Specifically, the long spiral drill rod 100 is used to drill in the construction position to form a pile hole. During the process of lifting the long spiral drill rod 100, the grouting pump 410 injects the grout 20 in the grout storage tank 420 into the pile hole. After the grout 20 reaches the set amount, the prestressed pipe pile 500 is lifted. The bucket 900 is then connected to the prestressed pipe pile 500 through the connecting structure. The connection is then disconnected, allowing the prestressed pipe pile 500 to be implanted into the pile hole by its own weight. Then, the prestressed pipe pile 500 is embedded into the bearing layer 30 by the vibratory hammer 600. After the grout 20 solidifies, the pile is formed.

[0043] In this way, the grout 20 in the grout storage tank 420 is fully infiltrated into the hole wall and bottom by the grouting pump 410, forming a cement-soil pile, which is organically combined with the subsequently implanted prestressed pipe pile 500 to form a cement-soil composite prestressed pipe pile 500 with high bearing capacity. This effectively solves the problem of the difficulty in constructing edge piles that are close to the edge of the foundation pit 10. Moreover, the process is continuous, fast and compact, with high pile planting efficiency and good pile quality. Overall, it has the characteristics of high efficiency, reliability and economy.

[0044] The power head 110 is connected to the long spiral pile driver, which has a vertically arranged frame, and the power head 110 is movably connected to the frame.

[0045] During the forward drilling process of the long auger drill rod 100 driven by the power head 110 in the soil layer, the power head 110 moves downward along the frame. During the reverse lifting process of the long auger drill rod 100 driven by the power head 110 in the pile hole, the power head 110 moves upward along the frame. In this way, the long auger drill rod 100 is driven by the power head 110 for rotary drilling and reverse lifting.

[0046] The top of the long spiral drill rod 100 is provided with a drill bit 120, and the long spiral drill rod 100 is provided with a rod cavity with a top opening, which extends along the axial direction of the long spiral drill rod 100; the drill bit 120 is provided with multiple nozzles 121, which are connected to the rod cavity.

[0047] The top opening of the long spiral drill rod 100 is connected to the grouting pump 410 and the air compressor 310 via the connecting pipe 200. During the reverse lifting of the long spiral drill rod 100 from the pile hole by the power head 110, the grouting pump 410 pumps the grout 20 from the storage tank 420 into the rod cavity and injects it into the pile hole through the nozzle 121. During the forward drilling of the long spiral drill rod 100 in the soil layer by the power head 110, the air compressor 310 injects high-pressure gas into the rod cavity, which is then injected into the pile hole through the nozzle 121. Thus, the design of the drill bit 120 facilitates drilling, while the design of the nozzle 121 allows high-pressure gas to be ejected during drilling, blowing up the drill cuttings at the bottom, increasing drilling efficiency and cooling the drill bit 120. Simultaneously, the nozzle 121 continuously sprays grout during the reverse lifting of the long spiral drill rod 100, making the drilling and grouting processes continuous, compact, and efficient, greatly improving pile formation efficiency and reducing construction costs.

[0048] In a preferred embodiment, the drill bit 120 is a cone-shaped part that is smaller at the bottom and larger at the top. The outer periphery of the drill bit 120 is provided with a plurality of drill teeth 122, which are arranged in a spiral pattern along the outer periphery of the drill bit 120. The outer periphery of the drill bit 120 has a spiral wall located between the plurality of drill teeth 122, which is arranged in a spiral pattern along the outer periphery of the drill bit 120.

[0049] Multiple nozzles 121 are formed on the spiral wall and are spaced apart along the spiral direction of the spiral wall. In this way, slurry 20 is sprayed out from multiple directions, and the sprayed slurry 20 impacts the borehole wall, so as to mix more evenly on the borehole wall.

[0050] The inner end of the connecting pipe 200 is connected to the long spiral drill rod 100, and the outer end of the connecting pipe 200 is connected to a tee head 210. The tee head 210 is connected to an air pipe 300 and a grout pipe 400. The air pipe 300 is connected to an air compressor 310, and the grout pipe 400 is connected to a grouting pump 410. An air pipe valve 301 is provided on the air pipe 300, and a grout valve 401 is provided on the grout pipe 400. In this way, the design of the tee head 210 eliminates the need to re-lay out pipelines, making the process continuous and compact. The grout valve 401 and the air pipe valve 301 can effectively control the grout 20 or high-pressure gas ejected from the nozzle 121.

[0051] The bucket 900 is connected to the prestressed pipe pile 500 through a hoisting structure. The front end of the bucket 900 has a shovel tooth 910 and the rear end of the bucket 900 has a hook 920. The hoisting structure includes a hoisting belt 800. One end of the hoisting belt 800 is provided with a fixed end, which forms a through hole 802. The other end of the hoisting belt 800 is provided with a connecting end, which forms a connecting hole 801.

[0052] The lifting sling 800 is wrapped around the outer periphery of the prestressed pipe pile 500, and the other end of the lifting sling 800 passes through the through hole 802. The lifting sling 800 forms an enclosing ring around the outer periphery of the prestressed pipe pile 500.

[0053] When the bucket 900 lifts the prestressed concrete pipe pile 500, the shovel teeth 910 are inserted into the connecting hole 801, and the enclosing ring is tightened, with the enclosing ring and the prestressed concrete pipe pile 500 relatively fixed. When the prestressed concrete pipe pile 500 sinks in the pile hole, the shovel teeth 910 disengage from the connecting hole 801, the enclosing ring relaxes, and the lifting strap 800 and the prestressed concrete pipe pile 500 are arranged movably. In this way, the prestressed concrete pipe pile 500 is fixedly bound by the lifting strap 800, and the lifting strap 800 is connected to the bucket 900 through the connecting structure, thus achieving a fixed connection between the bucket 900 and the prestressed concrete pipe pile 500, allowing the position of the prestressed concrete pipe pile 500 to be changed by moving the bucket 900.

[0054] The lifting sling 800 is equipped with a connecting belt 810. When the bucket 900 lifts the prestressed concrete pipe pile 500, the sling teeth 910 connect with the connecting hole 801, and the hook 920 connects with the connecting belt 810. When the prestressed concrete pipe pile 500 sinks in the pile hole, the sling teeth 910 disengage from the connecting hole 801, and the hook 920 moves the lifting sling 800 upward relative to the prestressed concrete pipe pile 500. In this way, through the design of the hook 920 and the connecting belt 810, the lifting sling 800 can be effectively retrieved after the sling teeth 910 disengage from the connecting hole 801, preventing the lifting sling 800 from falling into the pile hole.

[0055] The other end of the lifting sling 800 passes through the through hole 802 and has an extension 820 extending to the outside of the enclosing ring; the connecting sling 810 is movably connected to the lifting sling 800 and is connected in the middle of the enclosing ring; the extension 820 and the connecting sling 810 are arranged opposite to each other, respectively on both sides of the prestressed concrete pipe pile 500. In this way, a stable structure is formed, with the connecting sling 810 pulling on one side of the lifting sling 800 and the extension 820 pulling on the other side, preventing displacement.

[0056] In this embodiment, the vibratory hammer 600 vibrates and presses the prestressed pipe pile 500 through the pile driver 700; the prestressed pipe pile 500 has a hollow pipe hole 501, and the top of the prestressed pipe pile 500 has an upward-facing top annular surface 502, which surrounds the outer periphery of the top opening of the pipe hole 501; the bottom of the pile driver 700 has a downward-facing, inverted cone-shaped bottom end 710, and the outer periphery of the bottom end 710 has an outer peripheral wall 711. Along the bottom end 710 from bottom to top, the bottom end 710 is inclined outward.

[0057] An inner limiting post 720 extends downward from the middle of the bottom end 710, and an outer limiting ring 730 extends downward from the bottom of the pile driver 700. The outer limiting ring 730 surrounds the outer periphery of the bottom end 710. Multiple positioning blocks 510 are sleeved on the outer periphery of the prestressed pipe pile 500. The multiple positioning blocks 510 are spaced around the circumference of the prestressed pipe pile 500. When the prestressed pipe pile 500 is lowered into the pile hole, the multiple positioning blocks 510 abut against the inner wall of the pile hole to align the prestressed pipe pile 500 with the center of the pile hole.

[0058] The bottom of the pile driver 700 abuts against the top of the prestressed concrete pipe pile 500. The inner limiting post 720 and the lower part of the bottom end 710 are embedded in the pipe hole 501. The inner side of the top annular surface 502 abuts against the outer peripheral wall 711, and the outer limiting ring 730 is fitted around the outer periphery of the prestressed concrete pipe pile 500. In this way, the design of the positioning block 510 ensures that the prestressed concrete pipe pile 500 is aligned with the center of the pile hole, ensuring the quality of the pile body. At the same time, the top annular surface 502 abuts against the outer peripheral wall 711, achieving the effect of positioning and installation. Furthermore, the inner limiting post 720 and the lower part of the bottom end 710 embedded in the pipe hole 501, and the outer limiting ring 730 fitted around the outer periphery of the prestressed concrete pipe pile 500, effectively prevent large-scale displacement between the prestressed concrete pipe pile 500 and the pile driver 700, thus limiting the prestressed concrete pipe pile 500.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A prestressed concrete pipe pile long spiral pre-drilling grouting and self-weight pile driving construction equipment, characterized in that, It includes a long spiral drill rod for drilling into the soil to form a pile hole, a grouting pump connected to a grout storage tank containing grout, an air compressor, a bucket for hoisting the prestressed pipe pile into the pile hole, and a vibratory hammer for vibrating the prestressed pipe pile in the pile hole so that the lower part of the prestressed pipe pile is embedded in the bearing layer. The long spiral drill rod is connected to a power head that drives the long spiral drill rod to rotate. During the process of the power head driving the long spiral drill rod to drill in the soil, the air compressor injects high-pressure gas into the pile hole. During the process of the power head driving the long spiral drill rod to lift the pile hole, the grouting pump injects the grout from the grout storage tank into the pile hole. When the long spiral drill rod is disengaged from the pile hole and grout of a set depth is injected into the pile hole, the bucket lifts the prestressed pipe pile into the pile hole and disengages from the prestressed pipe pile. The prestressed pipe pile sinks in the pile hole by its own weight. After the prestressed pipe pile sinks to the set depth in the pile hole, the vibratory hammer vibrates and presses the prestressed pipe pile. The bucket is connected to the prestressed pipe pile via a hoisting structure. The front end of the bucket has shovel teeth, and the rear end of the bucket has a hook. The hoisting structure includes a hoisting strap. One end of the hoisting strap is provided with a fixed end, which forms a through hole. The other end of the hoisting strap is provided with a connecting end, which forms a connecting hole. The lifting sling is wrapped around the outer periphery of the prestressed concrete pipe pile, and the other end of the lifting sling passes through the through hole. The lifting sling is wrapped around the outer periphery of the prestressed concrete pipe pile to form an enclosing ring. When the bucket lifts the prestressed pipe pile, the shovel teeth are inserted into the connecting hole, the enclosing ring is tightened, and the enclosing ring is fixed relative to the prestressed pipe pile; when the prestressed pipe pile sinks in the pile hole, the shovel teeth disengage from the connecting hole, the enclosing ring is relaxed, and the lifting belt is movably arranged with the prestressed pipe pile.

2. The prestressed pipe pile long spiral pre-drilling grouting and self-weight pile driving construction equipment as described in claim 1, characterized in that, The power head is connected to the long spiral pile driver, which has a vertically arranged frame, and the power head is movably connected to the frame. During the forward drilling process of the long spiral drill rod driven by the power head in the soil layer, the power head moves downward along the frame. During the reverse lifting process of the long spiral drill rod driven by the power head in the pile hole, the power head moves upward along the frame.

3. The prestressed pipe pile long spiral pre-drilling grouting and self-weight pile driving construction equipment as described in claim 1, characterized in that, The long spiral drill rod is provided with a drill bit at the top, and a rod cavity with a top opening is provided in the long spiral drill rod, the rod cavity extending along the axial direction of the long spiral drill rod; the drill bit is provided with multiple nozzles, the nozzles communicating with the rod cavity; The top opening of the long spiral drill rod is connected to the grouting pump and the air compressor via connecting pipes. During the reverse lifting process of the long spiral drill rod driven by the power head from the pile hole, the grouting pump pumps the grout from the storage tank into the rod cavity and injects it into the pile hole through the nozzle. During the forward drilling process of the long spiral drill rod driven by the power head in the soil layer, the air compressor injects high-pressure gas into the rod cavity, and the high-pressure gas is injected into the pile hole through the nozzle.

4. The prestressed pipe pile long spiral pre-drilling grouting and self-weight pile driving construction equipment as described in claim 3, characterized in that, The drill bit is cone-shaped with a smaller bottom and a larger top. The outer periphery of the drill bit has multiple drill teeth arranged in a spiral pattern along the outer periphery of the drill bit. The outer periphery of the drill bit has a spiral wall located between the multiple drill teeth, and the spiral wall is arranged spirally along the outer periphery of the drill bit.

5. The prestressed pipe pile long spiral pre-drilling grouting and self-weight pile driving construction equipment as described in claim 4, characterized in that, Multiple nozzles are formed on the spiral wall and are spaced apart along the spiral direction of the spiral wall.

6. The prestressed pipe pile long spiral pre-drilling grouting and self-weight pile driving construction equipment as described in claim 3, characterized in that, The inner end of the connecting pipe is connected to the long spiral drill rod, and the outer end of the connecting pipe is connected to a three-way connector. The three-way connector is connected to an air pipe and a grout pipe respectively. The air pipe is connected to an air compressor, and the grout pipe is connected to a grouting pump. An air pipe valve is provided on the air pipe, and a grout valve is provided on the grout pipe.

7. The prestressed pipe pile long spiral pre-drilling grouting and self-weight pile driving construction equipment as described in any one of claims 1 to 6, characterized in that, The hoisting sling is equipped with a connecting belt. When the bucket lifts the prestressed pipe pile, the shovel teeth connect with the connecting hole, and the hook connects with the connecting belt. When the prestressed pipe pile sinks in the pile hole, the shovel teeth disengage from the connecting hole, and the hook moves upward relative to the prestressed pipe pile with the hoisting sling.

8. The prestressed pipe pile long spiral pre-drilling grouting and self-weight pile driving construction equipment as described in claim 7, characterized in that, The other end of the lifting sling passes through the through hole and has an extension extending to the outside of the enclosing ring; the connecting sling is movably connected to the lifting sling and is connected to the middle of the enclosing ring; the extension and the connecting sling are arranged opposite to each other and are respectively arranged on both sides of the prestressed pipe pile.

9. The prestressed pipe pile long spiral pre-drilling grouting and self-weight pile driving construction equipment as described in any one of claims 1 to 6, characterized in that, The vibratory hammer vibrates and compresses the prestressed pipe pile through the pile driver; the prestressed pipe pile has a hollow pipe hole, and the top of the prestressed pipe pile has an upward-facing top annular surface that surrounds the outer periphery of the top opening of the pipe hole; the bottom of the pile driver has a downward-facing, cone-shaped bottom end, and the outer periphery of the bottom end has an outer peripheral wall, and the bottom end is inclined outward along the direction from bottom to top; An inner limiting post extends downward from the middle of the bottom end, and an outer limiting ring extends downward from the bottom of the pile driver, the outer limiting ring surrounding the outer periphery of the bottom end; multiple positioning blocks are sleeved on the outer periphery of the prestressed pipe pile, the multiple positioning blocks are spaced around the circumference of the prestressed pipe pile; when the prestressed pipe pile is lowered into the pile hole, the multiple positioning blocks abut against the inner sidewall of the pile hole to align the prestressed pipe pile with the center of the pile hole; The bottom of the pile driver abuts against the top of the prestressed pipe pile. The inner limiting column and the lower part of the bottom end are both embedded in the pipe hole. The inner side of the top ring abuts against the outer peripheral wall. The outer limiting ring is sleeved on the outer periphery of the prestressed pipe pile.

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