CN217105067U - Enlarged pile shoe for high-pressure air impact pile sinking construction and construction equipment - Google Patents

Abstract

The utility model discloses an enlarge pile shoe and construction equipment for high-pressure air strikes pile sinking construction belongs to the construction equipment field. The utility model discloses a set up inlet channel and the vallecular cavity of the compressed air of blowing in enlarging pile shoe department to can with high-pressure compressed air impact energy and tubular pile whereabouts impact energy direct action enlarge the pile shoe, the immersed pile penetration ability obtains greatly promoting. Furthermore, the utility model discloses need not use the hammer hammering that falls in the work progress, can great degree protection pile body, prevent to cause the pile body defect when the pile. The utility model discloses can better solve crowded soil of construction, on-the-spot noise scheduling problem, and lower to the requirement of equipment and ground, be favorable to popularizing and applying.

Description

A enlarge pile shoe and construction equipment for high-pressure air strikes pile sinking construction

Technical Field

The utility model belongs to the construction equipment field, concretely relates to enlarge pile shoe and construction equipment for high-pressure air strikes pile sinking construction.

Background

With the continuous development of pile foundation engineering, the prestressed pipe pile has been increasingly applied in site construction due to the advantages of high construction speed, high efficiency, short construction period, high bearing capacity of single pile after pile forming, reliable quality and the like. However, in the pile sinking process, construction process difficulties such as obvious soil squeezing effect, difficult soil layer penetration and the like still exist, so that important attention needs to be paid to the pile sinking construction process.

At present, the construction process of the domestic main prestressed pipe pile comprises the following steps: hammering, static pressure, vibration, etc., among which hammering pile sinking method, static pressure pile sinking method is most commonly used. The hammering method is suitable for most foundations, but the diesel hammer is violent in vibration and large in noise during pile driving and cannot meet the requirements of urban construction, static pressure pile sinking is only suitable for homogeneous plastic viscous soil foundations, meanwhile, the hammering method and the static pressure method have obvious soil squeezing effects, have certain influence on surrounding buildings and underground pipelines, have high requirements for bearing capacity of an equipment platform, and need to carry out pretreatment on the area of the equipment platform on soft foundations. Therefore, it is highly desirable to provide a high-efficiency, environment-friendly and practical pile sinking construction device in the prior art.

Disclosure of Invention

The utility model aims to provide an enlarge pile shoe and construction equipment for high-pressure air impact pile sinking construction, which take the hammering method and static pressure method as the main construction environment in China at present and aims at overcoming the defects of the prior art.

The utility model discloses the concrete technical scheme who adopts as follows:

an enlarged pile shoe for high-pressure air impact pile sinking construction comprises an enlarged pile shoe body and a pile pad; the enlarged pile shoe body comprises a shoe tip, a central fixing column and a peripheral fixing ring, the tip of the shoe tip is used for being penetrated into a soil body, the central fixing column and the peripheral fixing ring are coaxially fixed on the top plane of the shoe tip, and the central fixing column is located in the center of the top plane of the shoe tip and used for being inserted into a pile bottom opening of the prestressed pipe pile in a matched mode; the periphery fixing ring surrounds the periphery of the top plane of the shoe tip and is used for being matched with and sleeving the bottom of the pile body side wall of the prestressed pipe pile; the top plane of the shoe tip forms a circular ring surface between the central fixing column and the peripheral fixing ring, and the pile pad is laid on the circular ring surface and used for supporting the pile bottom end face of the prestressed pipe pile; an air inlet pipeline and a groove cavity are formed in the enlarged pile shoe body; the groove cavity is arranged below the circular ring surface; and the air inlet end of the air inlet pipeline is communicated to the top of the central fixed column, and the air outlet end of the air inlet pipeline is communicated with the groove cavity.

Preferably, the air inlet end of the air inlet pipeline is connected with a pipeline connecting piece, and the pipeline connecting piece is used for connecting a hollow guide rod for inputting air from the outside.

Preferably, the groove cavity is annular and is formed along the center of the annular surface.

Preferably, the thickness of the peripheral fixing ring is not less than 5 cm, and the height is not less than 20 cm.

Preferably, the radius of the central fixing column is not less than 5 cm, and the height of the central fixing column is not less than 50 cm.

Preferably, the prestressed pipe pile, the central fixing column and the peripheral fixing ring form clearance fit.

Preferably, the pile pad is circular.

In a second aspect, the present invention provides a high pressure air impact pile sinking construction device, which comprises an enlarged pile shoe, a hollow guide rod, an air compressor and a guide pile frame according to any one of the first aspect; a compressed air output port of the air compressor is connected with one end of a hollow guide rod, and the other end of the hollow guide rod is connected with an air inlet end of an air inlet pipeline in the enlarged pile shoe; the guide pile frame is provided with a guide channel for the penetration of the prestressed pipe pile and is used for guiding the prestressed pipe pile in the vertical sinking process.

Preferably, the air compressor is a pulse type air compressor.

Preferably, the hollow guide rod is formed by splicing a plurality of hollow rod sections section by section.

Compared with the prior art, the utility model, following beneficial effect has:

the utility model discloses a set up inlet channel and the vallecular cavity of the compressed air of blowing in enlarging pile shoe department to can with high-pressure compressed air impact energy and tubular pile whereabouts impact energy direct action enlarge the pile shoe, the immersed pile penetration ability obtains greatly promoting. Furthermore, the utility model discloses need not use the hammer hammering that falls in the work progress, can great degree protection pile body, prevent to cause the pile body defect when the pile. The utility model discloses can better solve crowded soil of construction, on-the-spot noise scheduling problem, and lower to the requirement of equipment and ground, be favorable to popularizing and applying.

Drawings

FIG. 1 is a schematic view of an enlarged pile shoe for high pressure air impact pile sinking construction;

FIG. 2 is a schematic structural view of a high-pressure air impact pile-sinking construction equipment;

the reference numbers in the figures are: the pile shoe comprises an enlarged pile shoe body 1, a groove cavity 2, a pile pad 3, an air inlet pipeline 4, a hollow guide rod 5, a pipeline connecting piece 6, an air compressor 7, a prestressed pipe pile 8, a pile side channel 9, pile periphery layering soil 10 and a guide pile frame 11.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention. The utility model discloses technical characteristics in each embodiment are under the prerequisite that does not conflict each other, all can carry out corresponding combination.

In the description of the present invention, it will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be indirectly connected to the other element, i.e., intervening elements may be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.

As shown in fig. 1, in a preferred embodiment of the present invention, an enlarged shoe for high-pressure air impact pile sinking construction includes an enlarged shoe body 1 and a pile pad 3.

The structure of the enlarged pile shoe body 1 can be divided into three parts, namely a shoe tip, a central fixing column and a peripheral fixing ring, but in consideration of the actual manufacturing process, the whole enlarged pile shoe body 1 is integrally formed and does not need to be processed separately and then assembled. The boot tip is a tip-shaped structure with the bottom in an inverted cone shape, and the top surface of the boot tip is a flat circular plane. The tip of the boot tip is used for penetrating into the soil body, and the top plane is used for bearing the central fixing column and the peripheral fixing ring. Fixed ring coaxial fixation is on the top plane of boots point to center fixed column and periphery, wherein: the central fixing column is positioned in the center of the top plane of the shoe tip, is of a cylindrical structure and is used for being inserted into a pile bottom opening of the prestressed pipe pile 8 in a matching manner; the periphery fixing ring surrounds the periphery of the top plane of the shoe tip and is a hollow cylinder with a certain thickness and used for being matched with and sleeving the bottom of the side wall of the pile body of the prestressed tubular pile 8. The top plane of the shoe tip is clamped between the central fixing column and the peripheral fixing ring to form a circular ring surface, and the pile pad 3 is laid on the circular ring surface and used for supporting the pile bottom end face of the prestressed tubular pile 8.

When the enlarged pile shoe body 1 is used, the enlarged pile shoe body can be sleeved at the pile bottom end part of the prestressed pipe pile 8, the bottom opening of the pile body is clamped into the central fixing column, and the outer wall of the pile bottom after the pile body is clamped into the central fixing column is just encircled by the peripheral fixing ring, so that the prestressed pipe pile 8 is integrally supported on the enlarged pile shoe body 1. It should be noted, however, that the pre-stressed pipe pile 8 is installed with the enlarged shoe body 1 in a detachable manner, not tightly fixed, i.e. the pre-stressed pipe pile 8 can be detached from the enlarged shoe body 1 when a sufficiently large upward force is applied. The purpose of this is to be able to cooperate with the high-pressure air impact pile sinking process to carry out pile sinking construction on the prestressed pipe pile 8.

The high-pressure air impact pile sinking process is realized by pulse-type applied high-pressure compressed air. The expansion pile shoe body 1 is provided with an air inlet pipeline 4 and a groove cavity 2, wherein the groove cavity 2 is arranged below the circular ring surface, a notch of the groove cavity is communicated with a space between a central fixed column and a peripheral fixed ring for installing a prestressed pipe pile 8, an air inlet end of the air inlet pipeline 4 is communicated to the top of the central fixed column, and an air outlet end is communicated with the groove cavity 2.

High-pressure compressed air can be input through the air inlet end of the air inlet pipeline 4 and then conveyed into the communicating slot cavity 2 to impact the pile end above. Compressed air can be input in a pulse mode, the prestressed tubular pile 8 can be propped upwards for a certain distance under the impact of the compressed air and then falls under the action of gravity to generate impact force on the enlarged pile shoe body 1, and the pile shoe sinks integrally under the soil opening action of the shoe tip. The process is repeated continuously, and the prestressed pipe piles 8 can be driven into the foundation gradually.

The utility model discloses in, the vallecular cavity 2 can be a plurality of dispersions, independently set up in the ring surface at boots apex portion, also can be a holistic ring shape, set up along the center of ring surface. In order to ensure the uniformity of the impact on the prestressed pipe pile 8, a circular opening form is preferably adopted. Similarly, the pile pad 3 can be a plurality of scattered, also can be a holistic ring shape, the utility model discloses well preferred ring shape, it is on whole ring surface to fill as far as possible.

In addition, in order to facilitate the connection between the air inlet end of the air inlet pipeline 4 and the external air supply device, a pipeline connecting piece 6 may be arranged at the air inlet end of the air inlet pipeline 4, one end of the pipeline connecting piece 6 is connected with the air inlet end of the air inlet pipeline 4, and the other end of the pipeline connecting piece is connected with a hollow guide rod 5 for inputting air from the outside. The pipe connection 6 may be threaded at both ends to threadedly engage the inlet end of the inlet pipe 4 and the hollow guide rod 5.

In addition, the prestressed pipe pile 8 will be lifted up for a certain distance when receiving the impact force of the compressed air, and at this time, the enlarged pile shoe body 1 will be driven into the soil layer downward under the impact of the compressed air, so that a certain separation will be generated between the two. In order to prevent the prestressed pipe pile 8 from completely separating from the enlarged pile shoe body 1, the heights of the peripheral fixing ring and the central fixing column, especially the height of the central fixing column, need to be adjusted so that the prestressed pipe pile 8 cannot separate from the enlarged pile shoe body 1 when receiving the maximum impact force. Simultaneously, the solid fixed ring's of periphery thickness can direct influence the clearance size between 8 pile shafts of prestressing force tubular pile and the periphery soil body, and this clearance undersize can lead to producing great side friction to the pile shaft, can hinder prestressing force tubular pile 8 and reciprocate under compressed air impact force and gravity.

In the present invention, the thickness of the peripheral fixing ring is preferably set to be not less than 5 cm, and the height is not less than 20 cm. Meanwhile, the radius of the central fixing column is preferably set to be not less than 5 cm, and the height is preferably set to be not less than 50 cm.

In addition, the solid fixed ring clearance between 8 and central fixed column of prestressing force tubular pile and the periphery should not too big yet to can satisfy freely between the two and reciprocate as the standard the utility model discloses well preferred control prestressing force tubular pile 8 constitutes clearance fit between solid fixed ring and the solid fixed ring of central fixed column and periphery. In this way, part of air in a relatively closed space is used as buffer when the prestressed pipe pile 8 falls down and is impacted with the pile shoe, so that construction noise can be well controlled, and meanwhile, damage to a pile body structure is reduced.

In addition, as shown in fig. 2, the utility model discloses in based on the above-mentioned enlarged pile shoe that is used for high-pressure air to strike pile sinking construction, still provide a high-pressure air and strike pile sinking construction equipment, it includes enlarged pile shoe and cavity guide arm 5, air compressor 7 and guide pile frame 11 shown in fig. 1. A compressed air output port of the air compressor 7 is connected with one end of the hollow guide rod 5, and the other end of the hollow guide rod 5 is connected with an air inlet end of an air inlet pipeline 4 in the enlarged pile shoe; the guide pile frame 11 is provided with a guide channel for the penetration of the prestressed pipe pile 8, and is used for guiding the prestressed pipe pile 8 in the vertical sinking process when erected on the ground. The enlarged shoe shown in fig. 1 is installed at the position a in fig. 2, namely, at the bottom end of the prestressed pipe pile 8.

The utility model provides a highly-compressed air is the compressed air after the compression, consequently in order to guarantee the impact effect of highly-compressed air to stress tube stake 8 in advance, air compressor 7 is preferred to adopt pulsed air compressor, can pulsed output compressed air's air compressor promptly. In addition, the output air pressure of the air compressor 7 is preferably adjustable, and can be adjusted according to the current construction depth geological condition, so that the pile sinking efficiency is higher.

In addition, the hollow guide rod 5 preferably adopts an assembled structure and is formed by splicing a plurality of hollow rod sections section by section, and the hollow rod sections can be added section by section according to the depth of the pile sinking so as to meet the construction requirement. The hollow guide rod 5 should be made of a material capable of withstanding the pressure generated by the pulse of high-pressure air, and the connection position between the hollow rod sections should have good airtightness.

In addition, the guide pile frame 11 can be supported on the ground where the pile foundation is located through the installation supporting legs, the diameter of the guide channel is slightly larger than the diameter of the pile body of the prestressed pipe pile 8, but the guide channel is not too large, and the pile body is prevented from horizontally shaking.

When the enlarged pile shoe is used, the enlarged pile shoe can be arranged on the pile bottom end face of the prestressed pipe pile 8, and then the prestressed pipe pile 8 with the enlarged pile shoe is lifted to penetrate through the guide channel of the guide pile frame 11, so that the shoe tip is supported on the foundation. And then connecting an air compressor 7 with the hollow guide rod 5, and connecting the hollow guide rod 5 with the air inlet end of the air inlet pipeline 4 in the enlarged pile shoe to finish the preparation work. Then, pulse high-pressure air is gradually pumped into the groove cavity 2 through the hollow guide rod 5 by the air compressor 7, the enlarged pile shoe is pumped into a soil layer under the impact action of the high-pressure air, meanwhile, a pile side gap channel is formed for a pile body due to the enlarged pile diameter of the pile shoe, the prestressed pipe pile 8 firstly moves upwards and then freely falls under the impact of compressed air, and the enlarged pile shoe is further impacted, so that the enlarged pile shoe is further sunk into the soil layer. The process is repeated continuously, and the prestressed pipe pile 8 can be driven into the foundation.

The above-mentioned embodiments are merely a preferred embodiment of the present invention, but it is not intended to limit the present invention. Various changes and modifications can be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, all the technical schemes obtained by adopting the mode of equivalent replacement or equivalent transformation fall within the protection scope of the utility model.

Claims (10)

1. An enlarged pile shoe for high-pressure air impact pile sinking construction is characterized by comprising an enlarged pile shoe body (1) and a pile pad (3); the enlarged pile shoe body (1) comprises a shoe tip, a central fixing column and a peripheral fixing ring, the tip of the shoe tip is used for being penetrated into a soil body, the central fixing column and the peripheral fixing ring are coaxially fixed on the top plane of the shoe tip, and the central fixing column is located in the center of the top plane of the shoe tip and used for being inserted into a pile bottom opening of the prestressed pipe pile (8) in a matched mode; the periphery fixing ring surrounds the periphery of the top plane of the shoe tip and is used for being matched with and sleeving the bottom of the pile body side wall of the prestressed pipe pile (8); the top plane of the shoe tip forms a circular ring surface between the central fixing column and the peripheral fixing ring, and the pile pad (3) is flatly laid on the circular ring surface and used for supporting the pile bottom end face of the prestressed pipe pile (8); an air inlet pipeline (4) and a groove cavity (2) are formed in the enlarged pile shoe body (1); the groove cavity (2) is arranged below the circular ring surface; and the air inlet end of the air inlet pipeline (4) is communicated to the top of the central fixed column, and the air outlet end of the air inlet pipeline is communicated with the groove cavity (2).

2. The enlarged pile shoe for high-pressure air impact pile driving according to claim 1, wherein the air inlet end of the air inlet pipe (4) is connected to a pipe connector (6), and the pipe connector (6) is used for connecting a hollow guide rod (5) for inputting air from the outside.

3. The enlarged pile shoe for high-pressure air impact pile driving according to claim 1, wherein the cavity (2) is formed in a circular ring shape and is opened along the center of the circular ring surface.

4. The enlarged shoe for high pressure air impact piling according to claim 1 wherein said peripheral retaining ring has a thickness of no less than 5 cm and a height of no less than 20 cm.

5. The enlarged pile shoe for high pressure air impact pile driving according to claim 1, wherein said center fixing post has a radius of not less than 5 cm and a height of not less than 50 cm.

6. The enlarged pile shoe for high-pressure air impact pile driving according to claim 1, wherein the pre-stressed pipe pile (8) is in clearance fit with the central fixing column and the peripheral fixing ring.

7. The enlarged pile shoe for high-pressure air impact pile driving according to claim 1, wherein the pile pad (3) has a circular ring shape.

8. A high pressure air impact pile sinking construction equipment, characterized in that it comprises an enlarged pile shoe according to any one of claims 1 to 7, a hollow guide rod (5), an air compressor (7) and a guide pile frame (11); a compressed air output port of the air compressor (7) is connected with one end of a hollow guide rod (5), and the other end of the hollow guide rod (5) is connected with an air inlet end of an air inlet pipeline (4) in the enlarged pile shoe; the guide pile frame (11) is provided with a guide channel for the penetration of the prestressed pipe pile (8) and is used for guiding the prestressed pipe pile (8) in the vertical sinking process.

9. The high-pressure air percussion pile driving construction equipment as claimed in claim 8, wherein said air compressor (7) is a pulse type air compressor.

10. The high-pressure air impact pile driving construction equipment as claimed in claim 8, wherein the hollow guide rod (5) is formed by splicing a plurality of hollow rod segments section by section.

Images