A pneumatic impact type pipe pile-anchor composite foundation construction device

Abstract

This utility model discloses a pneumatic impact-type pipe pile-anchor composite foundation construction device, including a stainless steel borehole wall casing, a prestressed pipe pile, an enlarged pile shoe body, a groove cavity, and pipe connectors. The stainless steel borehole wall casing is divided into a surface part and an inner part according to its position. The stainless steel borehole wall casing is installed around the pipe pile, and adjacent stainless steel casing walls are connected by iron chains and turnbuckles. The iron chains are embedded in the surface end face of the stainless steel borehole wall casing, and the lifting rings are embedded in the surface part of the stainless steel borehole wall casing. The stainless steel borehole wall casing passes through the prestressed pipe pile. The enlarged pile shoe body is divided into three parts: a shoe tip, a central fixing column, and an outer fixing ring. The enlarged pile shoe body is located at the bottom end of the prestressed pipe pile. This utility model can avoid the collapse of the top soil due to the impact and vibration of the falling pipe pile. At the same time, it does not use conventional drop hammers during construction, which can protect the quality of the pile top to a greater extent and reduce problems such as soil displacement and noise during construction.

Description

Technical Field

[0001] This utility model belongs to the field of pile foundation construction equipment, and in particular relates to a pneumatic impact type pipe pile-anchor composite foundation construction device. Background Technology

[0002] Prestressed concrete pipe piles have been increasingly used in high-rise building construction due to their advantages such as fast construction speed, high efficiency, short construction period, high single pile bearing capacity and reliable quality after pile completion. However, the general pile driving process has technical difficulties such as obvious soil squeezing effect and difficulty in penetrating the soil layer, so it is necessary to improve the pile driving construction process.

[0003] Currently, the main construction techniques for prestressed concrete pipe piles include: hammer driving, static pressure driving, and vibration driving. Hammer driving is widely used in various foundation types; however, diesel hammers cause severe vibration and noise, which is unacceptable in urban residential and commercial areas where noise pollution is a concern. Static pressure driving is only suitable for relatively homogeneous plastic cohesive soil foundations. Both methods exhibit significant soil displacement effects, and excessive soil displacement may cause cracking, deformation, or even failure of surrounding buildings and underground pipelines. Therefore, there is an urgent need for a more efficient, environmentally friendly, and practical pile driving equipment.

[0004] Existing technologies utilize enlarged pile shoes for high-pressure air impact pile driving, eliminating the need for drop hammers and significantly protecting the pile body from defects during driving. This also effectively addresses issues like soil displacement and noise. However, these technologies do not reinforce the soil around the top of the pile. Due to their low strength and lack of constraint, especially in cohesive soils like sandy soils, the top soil is prone to collapse during pile driving due to impact and vibration, compromising construction safety. Furthermore, to provide sufficient uplift capacity, the pile diameter is generally large, leading to higher construction costs and low driving efficiency in rock formations. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a pneumatic impact type pipe pile-anchor composite foundation construction device.

[0006] The purpose of this utility model is achieved through the following technical solution: a pneumatic impact type pipe pile-anchor composite foundation construction device, comprising: stainless steel borehole wall casing, prestressed pipe pile, anchor cable, anchor rod, enlarged pile shoe, groove cavity, hollow guide rod and anchor rod installation channel;

[0007] The bottom of the prestressed pipe pile is equipped with an enlarged pile shoe, and a hollow guide rod is set in the middle of the prestressed pipe pile.

[0008] The top plane of the enlarged pile shoe forms a cavity with the prestressed pipe pile, and the cavity is connected to the air outlet end of the hollow guide rod.

[0009] The anchor installation channel penetrates the interior of the prestressed pipe pile and the enlarged pile shoe, and the anchor is installed in the underground rock layer through the anchor installation channel;

[0010] The prestressed pipe pile is equipped with a stainless steel borehole wall casing; the underground part of the stainless steel borehole wall casing is installed together with the prestressed pipe pile in the construction hole, and the above-ground part is equipped with anchor cables, the other end of which is installed in the stratum.

[0011] Furthermore, the air inlet end of the hollow guide rod is also connected to an air compressor.

[0012] Furthermore, the underground part of the stainless steel hole wall casing is a hollow cylindrical iron plate with a certain thickness, the same as the thickness of the outer circumferential fixing ring of the enlarged pile shoe body, and the surface part is a square iron plate with a circular opening inside, the center of the opening coinciding with the center of the square, and the thickness of the iron plate is the same as that of the inner part of the hole.

[0013] Furthermore, there are four anchor cable installation channels, evenly distributed around the hollow guide rod.

[0014] Furthermore, there are four anchor cables in total, corresponding to the size of the anchor bolt installation channel, and the upper end is connected to the anchor bolt drilling device.

[0015] Furthermore, the anchor rod is installed at the location of the soil layer at 1 / 3 of the length of the pipe pile below the bottom of the enlarged pile shoe body.

[0016] Furthermore, a pile pad is installed between the groove cavity and the prestressed pipe pile.

[0017] Furthermore, several symmetrically arranged slots are provided, and an air intake pipe is provided between the hollow guide rod and the slot to connect two different slots.

[0018] Compared with the prior art, this utility model has the following advantages:

[0019] This invention, by installing a stainless steel borehole casing above the pile hole, can prevent vibration-induced soil collapse. Furthermore, it eliminates the need for conventional drop hammer hammering during construction, reducing soil displacement and noise. In addition, by combining prestressed pipe piles with anchor foundations, the pipe piles primarily provide downward and horizontal bearing capacity, while the anchor foundations primarily provide upward bearing capacity. This reduces the diameter of the prestressed pipe piles, saving costs while increasing the foundation's rock-breaking capacity. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a hole protection device used in high-pressure air impact pile driving construction.

[0021] Figure 2 This is a schematic diagram of the enlarged pile shoe structure provided in an embodiment of the present utility model.

[0022] The attached diagram is labeled as follows: 1. Enlarged pile shoe body; 1-1. Shoe tip; 1-2. Outer peripheral fixing ring; 1-3. Central fixing column; 2. Air intake pipe; 3. Groove cavity; 4. Pile pad; 5. Anchor bolt installation channel; 6. Pile side channel; 7. Hollow guide rod; 8. Anchor bolt; 9. Pipe pile; 10. Soil around the pile; 11. Stainless steel borehole casing; 12. Air compressor; 13. Anchor cable; 14. Grouting anchoring section; 15. Rock layer. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the single embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] like Figure 1 and Figure 2 As shown, this utility model provides a pneumatic impact type pipe pile-anchor composite foundation construction device, including a stainless steel borehole wall casing 11, a pipe pile 9, an anchor cable 13, an anchor rod 8, an enlarged pile shoe body 1, a groove 3, a hollow guide rod 7, and an anchor rod installation channel 5. The stainless steel borehole wall casing 11 is divided into a surface part and an inner part according to its position. The stainless steel borehole wall casing 11 is installed around the pipe pile 9 and passes through the pipe pile 9. One end of the anchor cable 13 is connected to the side of the stainless steel borehole wall casing 11, and the other end is driven into the stratum. The anchor rod 8 is distributed around the hollow guide rod 7. The enlarged pile shoe body 1 is divided into three parts: a shoe tip 1-1, an outer peripheral fixing ring 1-2, and a central fixing column 1-3. The enlarged pile shoe body 1 is located at the bottom end of the pipe pile 8. The anchor rod installation channel 5 is evenly distributed around the hollow guide rod 7 and penetrates the prestressed pipe pile and the interior of the enlarged pile shoe.

[0025] As a preferred option, the inside of the stainless steel hole wall casing 11 is divided into hollow cylindrical iron plates with a certain thickness, the thickness of which is the same as the thickness of the outer peripheral fixing ring of the enlarged pile shoe body 1.

[0026] Preferably, the surface portion of the stainless steel hole wall casing 11 is a square iron plate with a circular opening inside, the center of the opening coinciding with the center of the square, and the thickness of the iron plate being the same as that of the inner portion of the hole.

[0027] Preferably, there are four anchor cables 13, one end of which is connected to the four sides of the stainless steel borehole wall casing 11, and the other end is provided with a grouting anchor section 14 to provide tension to the stainless steel borehole wall casing 11.

[0028] Preferably, there are four anchor bolts 8, which are evenly distributed around the hollow guide rod 7, and the upper end is connected to the anchor bolt drilling device.

[0029] As a preferred option, there are four installation channels 5 for the anchor bolt 8, corresponding to the position and size of the anchor bolt 8.

[0030] Preferably, the anchor bolt 8 is installed at the length of the pipe pile 9, which is 1 / 3 of the depth below the bottom of the enlarged pile shoe body 1.

[0031] As a preferred option, in order to be staggered with the anchor bolt 8, the groove 3 is symmetrically set with 4 sections and the air inlet pipe is set with 2 sections.

[0032] Based on the above-described device structure, the embodiment also provides a construction process for using the device:

[0033] S1. Excavate a soil layer to a certain depth on the foundation to be treated, just deep enough to install the enlarged pile shoe body 1 and the stainless steel borehole casing 11.

[0034] S2. Repeat step S1 to install all the enlarged pile shoes 1 and stainless steel borehole casings 11.

[0035] S3. Drill holes for the construction anchor cables 13, install the anchor cables 13, and grout the ends to form the grouting anchor section 14. Repeat this step until all stainless steel borehole casings 11 are connected to anchor cables 13.

[0036] S4. Pipe pile 9 is passed through stainless steel borehole casing 11 in sequence and finally supported on enlarged pile shoe body 1. Pipe pile 9 and pile shoe body 1 are connected by pile pad 4.

[0037] S5. Install a hollow guide rod 7 in the pipe pile 9, which together with the air intake pipe 2 and the slot 3 serves as a transmission channel for the compressed air generated by the air compressor 12.

[0038] S5. Turn on the pulse air compressor 12, so that the pipe pile 9 first moves upward under the support of the compressed air, and then falls under the action of gravity, thus expanding the impact force on the pile shoe body 1 and causing it to settle. Repeat this step until the prestressed pipe pile 9 is installed to the specified depth.

[0039] S6. The anchor rod 8 is sequentially passed through the pipe pile 9 and the anchor rod installation channel 5, and installed to 1 / 3 of the length of the pipe pile 9 within the rock layer 15. Grouting is then injected into the pipe pile 9 to form a solid whole with the anchor rod 8. The anchor rod 8 provides most of the pull-out bearing capacity, while the pipe pile 9 mainly provides the compressive and horizontal bearing capacity. Furthermore, because the anchor rod 8 is embedded in the rock layer 15, it also provides a portion of the compressive bearing capacity.

[0040] The above embodiments are used to explain and illustrate the present utility model, and are not intended to limit the present utility model. Any modifications and changes made to the present utility model within the spirit and scope of the claims shall fall within the protection scope of the present utility model.

Claims

1. A pneumatic impact type pipe pile-anchor composite foundation construction device, characterized in that, include: Stainless steel borehole casing, prestressed pipe pile, anchor cable, anchor rod, enlarged pile shoe, groove cavity, hollow guide rod and anchor rod installation channel; The bottom of the prestressed pipe pile is equipped with an enlarged pile shoe, and a hollow guide rod is set in the middle of the prestressed pipe pile. The top plane of the enlarged pile shoe forms a cavity with the prestressed pipe pile, and the cavity is connected to the air outlet end of the hollow guide rod. The anchor installation channel penetrates the interior of the prestressed pipe pile and the enlarged pile shoe, and the anchor is installed in the underground rock layer through the anchor installation channel; The prestressed pipe pile is equipped with a stainless steel borehole wall casing; the underground part of the stainless steel borehole wall casing is installed together with the prestressed pipe pile in the construction hole, and the above-ground part is equipped with anchor cables, the other end of which is installed in the stratum.

2. The pneumatic impact type pipe pile-anchor composite foundation construction device according to claim 1, characterized in that, The air inlet end of the hollow guide rod is also connected to an air compressor.

3. The pneumatic impact type pipe pile-anchor composite foundation construction device according to claim 1, characterized in that, The underground part of the stainless steel borehole casing is a hollow cylindrical iron plate with a certain thickness, the same as the thickness of the outer fixing ring of the enlarged pile shoe. The surface part is a square iron plate with a circular opening inside, the center of the opening coinciding with the center of the square. The thickness of the iron plate is the same as that of the inner part of the borehole.

4. The pneumatic impact type pipe pile-anchor composite foundation construction device according to claim 1, characterized in that, There are four anchor cable installation channels, which are evenly distributed around the hollow guide rod.

5. The pneumatic impact type pipe pile-anchor composite foundation construction device according to claim 4, characterized in that, There are four anchor cables in total, corresponding to the size of the anchor bolt installation channel, and the upper end is connected to the anchor bolt drilling device.

6. The pneumatic impact type pipe pile-anchor composite foundation construction device according to claim 1, characterized in that, The anchor rod is installed at the location where it is 1 / 3 of the length of the pipe pile below the bottom of the enlarged pile shoe body.

7. The pneumatic impact type pipe pile-anchor composite foundation construction device according to claim 1, characterized in that, A pile pad is also installed between the groove and the prestressed pipe pile.

8. The pneumatic impact type pipe pile-anchor composite foundation construction device according to claim 1, characterized in that, Several symmetrically arranged slots are provided, and an air intake pipe is provided between the hollow guide rod and the slot to connect two different slots.

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