CN214061599U

CN214061599U - Pile head structure of tubular pile

Info

Publication number: CN214061599U
Application number: CN202022470691.5U
Authority: CN
Inventors: 李娟科; 刘巍; 王敏; 杨升华; 张弛; 孟强
Original assignee: Ningxiang Ninghua New Material Co ltd
Current assignee: Ningxiang Ninghua New Material Co ltd
Priority date: 2020-10-31
Filing date: 2020-10-31
Publication date: 2021-08-27
Anticipated expiration: 2030-10-31

Abstract

A pile head structure of a tubular pile comprises a pile body and a pile head arranged at the end part of the pile body; and a metal cover is fixed outside the pile head and completely or partially covers the pile head. The utility model can protect the concrete of the pile head from falling off or generating cracks, greatly increase the rigidity and the strength of the pile head, and has low cost and good durability; on the other hand, the efficiency of driving the pile body into the soil body can be improved, and the piling time is shortened.

Description

Pile head structure of tubular pile

Technical Field

The utility model relates to a tubular pile for the building foundation engineering, especially a pile head structure of tubular pile.

Background

The prestressed high-strength concrete pipe pile has the advantages of reliable pile body quality, economy, practicability, strong adaptability, environmental protection, convenient construction, short construction period, lower construction cost and the like, and is widely applied to engineering projects such as industrial and civil buildings, railways, ports and docks, water conservancy, bridges and the like.

As is well known, the obvious defects of the common concrete pipe pile are poor crack resistance, low rigidity and poor deformation performance. Particularly, the tubular pile is driven into a soil layer by a pile head, and the pile head is easy to touch rocks and the like in the process of penetrating the soil layer, so that concrete cracks or falls off, the strength of the prefabricated building structure is reduced, and the foundation structure is unfavorable for earthquake resistance.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the above-mentioned not enough of prior art and providing a low cost, rigidity is big, the pile head structure of crack resistant tubular pile.

The technical scheme of the utility model is that: a pile head structure of a tubular pile comprises a pile body and a pile head arranged at the end part of the pile body; and a metal cover is fixed outside the pile head and completely or partially covers the pile head.

Further, the pile head and the pile body are made of concrete, and the metal cover is made of steel or iron.

Further, the metal cover is made of stainless steel.

Furthermore, the metal cover is welded with reinforcing steel bars, and the reinforcing steel bars are embedded into the pile heads and fixed.

Furthermore, the metal cover covers the head position of the pile head and occupies the volume of the pile head 1/3-1/2.

Further, the shape of the pile head is hexagonal pyramid.

Furthermore, the edge of the pile head is arc-shaped.

Furthermore, the edge is an arc which is convex or concave.

Further, the shape of the metal cover is matched with that of the pile head.

Furthermore, the front end of the metal cover is pointed, and the steel bars are welded on the inner surface of the metal cover.

The utility model has the advantages that: on one hand, the concrete of the pile head can be protected from falling off or generating cracks, the rigidity and the strength of the pile head are greatly increased, the cost is low, and the durability is good; on the other hand, the efficiency of driving the pile body into the soil body can be improved, and the piling time is shortened.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a side view of the embodiment shown in FIG. 1;

fig. 3 is a schematic structural diagram of a metal cover according to an embodiment of the present invention.

Detailed Description

The invention will be described in further detail with reference to the drawings and specific examples.

As shown in fig. 1 to 3: a pile head structure of a tubular pile comprises a pile body 1 and a pile head 2 arranged at the end part of the pile body; the outside of the pile head 2 is fixed with a metal cover 3, and the metal cover 3 completely or partially covers the pile head 2.

The scheme has the following advantages: the concrete pipe pile has the obvious defects of poor crack resistance, low rigidity, easy falling or crack generation in the process of driving into a soil layer, rough concrete and low piling speed. In the embodiment, the metal cover is arranged outside the pile head, so that on one hand, the concrete can be protected from falling off or generating cracks, and the metal cover is made of metal materials and has certain rigidity, so that cracks can not be generated; on the other hand, the metal surface is substantially smooth, which increases the speed of penetration into the earth. And the strength of the metal material and the original material of the pile head can be further improved.

In this embodiment, the metal cover 3 may cover the pile head completely, but this wastes metal material, and the pile head is easily damaged mainly at the front end portion, so this embodiment preferably covers only the head portion of the pile head, and more preferably, the metal cover 3 covers the volume of the pile head 1/2.

In this embodiment, the front end of the metal cover 3 is pointed, which can reduce the soil resistance. Since the front end of the metal cover 3 is pointed, the front end of the pile head 2 may be pointed or not.

In this embodiment, pile head 2 and pile body 1 are the concrete material, have advantages such as intensity is big, the durability is good, the low price. The metal cover 3 is preferably made of stainless steel, and has good crack resistance, rigidity and durability. By combining the concrete and the stainless steel, the advantage of low cost of the concrete is kept, and the defect that the concrete is easy to crack and fall off is overcome.

In this embodiment, the connection mode of the metal cover 3 and the pile head 2 is as follows: because the pile head 2 is made of concrete and the metal material is not firmly connected with the concrete, the steel bar 4 is welded on the metal cover 3, so that the steel bar 4 can be firmly embedded into the concrete of the pile head 2. The embodiment embeds the reinforcing bar of metal covering in the concrete at the concrete placement in-process of pile body, can be with the two firm connections after the concrete solidifies. Wherein the steel bar is welded on the inner surface of the metal cover.

In this embodiment, the pile head 2 is in the shape of a hexagonal pyramid. The pile head 2 is designed into a hexagonal pyramid shape, so that on one hand, the efficiency of driving the pile body into the soil body can be improved, namely, compared with other cone-shaped structures, the hexagonal pyramid-shaped structure is simpler to process, and the speed of driving the pile body into the soil body is high; on the other hand, the strength of the pile head can be improved, and the hexagonal pyramid-shaped cross section is hexagonal and stable in structure.

In order to make the pile head 2 perfectly fit with the metal cover 3, the shape of the metal cover 3 is completely the same as that of the pile head, namely the metal cover 3 is also designed into a hexagonal pyramid shape, and the front end is a tip part. The six faces of the metal cover 3 are all welded with reinforcing steel bars 4, so that the connection firmness is greatly improved.

In this embodiment, the pile head 2 and the edge 5 of the metal cover 3 are both arc-shaped. Thus, compared to the linear type, the air resistance in the movement can be reduced, and the strength is higher.

In the embodiment, the edge 5 is an arc shape protruding outwards, so that the air resistance in the movement can be greatly reduced, the speed of the pile body 1 penetrating through the soil body is high, and the time and the electric power for piling are saved.

Or, the edge is the arc of indent, can reduce the air resistance in the motion on the one hand, and on the other hand, the building foundation pile of specially adapted short building, the tubular pile can only get into the soil layer without getting into the rock layer, and the arc of indent can increase the frictional force between pile head and the foundation soil layer for in the pit of indent is attached to the soil body, and then makes to be connected more firmly between the pile body and the soil layer.

The working principle of the embodiment is as follows: the pile head 2 is driven by the pile driving equipment to drill into the soil body, the metal cover 3 on the pile head quickly drills into the soil layer or into the soil layer to reach the rock layer and is embedded into the rock layer, and concrete is poured into the upper portion of the pile body 1. The tip of the metal cover 3 can make the pile body quickly drive into the soil layer, and the head of the pile head 2 can not crack or fall off under the protection of the metal cover.

In conclusion, on one hand, the concrete of the pile head can be protected from falling off or generating cracks, the rigidity and the strength of the pile head are greatly improved, the cost is low, and the durability is good; on the other hand, the efficiency of driving the pile body into the soil body can be improved, and the piling time is shortened.

Claims

1. A pile head structure of a tubular pile comprises a pile body and a pile head arranged at the end part of the pile body; the pile head is characterized in that the pile head is in a hexagonal pyramid shape; and a metal cover is fixed outside the pile head and completely or partially covers the pile head.

2. The pile head structure of the tubular pile of claim 1, wherein the pile head and the pile body are made of concrete, and the metal cover is made of steel or iron.

3. The pile head structure of the tubular pile of claim 2, wherein the metal cover is made of stainless steel.

4. The pile head structure of claim 3, wherein the metal cover is welded with reinforcing bars, and the reinforcing bars are embedded in the pile head and fixed.

5. The pile head structure of the tubular pile of claim 1, 2 or 3, wherein the metal cover covers the head position of the pile head and occupies the volume of the pile head 1/3-1/2.

6. The pile head structure of the tubular pile of claim 1, 2 or 3, wherein the edge of the pile head is arc-shaped.

7. The pile head structure of the tubular pile of claim 6, wherein the edge is a convex arc or a concave arc.

8. The pile head structure of the tubular pile of claim 1, 2 or 3, wherein the shape of the metal cover is adapted to the shape of the pile head.

9. The pile head structure of the tubular pile according to claim 4, wherein the front end of the metal cover is pointed, and the reinforcing steel bars are welded to the inner surface of the metal cover.