CN210887195U

CN210887195U - Bridge CFG pile structure

Info

Publication number: CN210887195U
Application number: CN201921236644.5U
Authority: CN
Inventors: 周瑞; 魏焰; 朱伯东; 杨武斌; 张景龙
Original assignee: Kunming Railway Construction Co of China Railway No 8 Engineering Group Co Ltd
Current assignee: Kunming Railway Construction Co of China Railway No 8 Engineering Group Co Ltd
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-06-30
Anticipated expiration: 2029-08-01

Abstract

The utility model discloses a bridge CFG pile structure, it includes middle pile body, marginal pile body, reinforced column, strengthening rib, splice bar, stand, reinforced concrete cap, middle pile body, marginal pile body set up in the foundation soil layer of pier, the reinforced concrete cap sets up on middle pile body, marginal pile body is rectangle distribution, middle pile body sets up between marginal pile body, the mid point of marginal pile body is isosceles triangle with the mid point line of two adjacent marginal pile bodies, the number of marginal pile body is the even number and is four at least, the number of middle pile body adds one for half of marginal pile body number again, the utility model discloses a bridge CFG pile structure, sound construction, the durability is strong, can be integrative with the pier, reinforcing bridge intensity.

Description

Bridge CFG pile structure

Technical Field

The utility model relates to a bridge field especially relates to a bridge CFG stake structure.

Background

The CFG pile is an abbreviation of English Cement Fly-ash Gravel, and means a Cement Fly ash Gravel pile, which is a variable-strength pile with certain strength and is made of Gravel, stone chips, sand, Fly ash, Cement and water through mixing and using various pile forming machines. The CFG pile is a low-strength concrete pile, can fully utilize the combined action of bearing capacity of soil among the piles, can transmit load to a deep foundation and has better technical performance and economic effect.

The CFG pile composite foundation is connected with the foundation through the mattress layer, and whether the pile end falls on a common soil layer or a hard soil layer, the soil between the piles can be guaranteed to participate in the work all the time. Because the strength and modulus of the pile body are larger than those of the soil between the piles, the stress of the pile top is larger than the surface stress of the soil between the piles under the action of load. The piles can transmit the borne load to a deeper soil layer and correspondingly reduce the load borne by soil among the piles. Therefore, the bearing capacity of the composite foundation is improved and the deformation is reduced under the action of the pile, and in addition, the CFG pile is not provided with ribs, and the pile body utilizes industrial waste fly ash as an admixture, so that the construction cost is greatly reduced.

When a bridge pier of a bridge is constructed, a CFG pile is usually required to be arranged in a foundation soil layer, then a pier base body is manufactured on the CFG pile, a hole is usually drilled in the soil layer of the existing CFG pile, and then broken stone, stone chips, sand, fly ash, cement and the like are filled in the hole. When a bridge is built in a mountain canyon, piers are generally more than 50m, the load on CFG piles is large, and the C FG pile body is cracked and then loses effect after a period of time because the bearing capacity of the CFG piles of the common structure is larger than the soil layer between the piles in a long-time working state.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bridge CFG stake structure to prior art not enough, sound construction, the durability is strong, can be integrative with the pier, reinforcing bridge strength.

In order to achieve the above purpose, the present invention is achieved by the following technical solutions.

A bridge CFG pile structure comprises a middle pile body, edge pile bodies, reinforcing columns, reinforcing ribs, connecting ribs, stand columns and reinforced concrete caps, wherein the middle pile body and the edge pile bodies are arranged in a foundation soil layer of a bridge pier, the reinforced concrete caps are arranged on the middle pile body and the edge pile bodies, the edge pile bodies are distributed in a rectangular shape, the middle pile body is arranged between the edge pile bodies, a connecting line between a middle point of each edge pile body and a middle point of each two adjacent edge pile bodies is an isosceles triangle, the number of the edge pile bodies is even and at least four, the number of the middle pile bodies is half of the number of the edge pile bodies, one reinforcing column is added, the reinforcing columns are arranged in the middle pile body and the edge pile bodies, the number of the reinforcing columns in each middle pile body and each edge pile body is four, the four reinforcing columns are in a quadrangular pyramid shape, and the reinforcing ribs are welded among the reinforcing columns, the reinforcing ribs on the same layer are connected to form a square, connecting ribs are arranged between the adjacent reinforcing columns in the middle pile body and the edge pile body, a stand column is vertically arranged in the middle of each connecting rib, and the stand column and a reinforcing mesh in the reinforced concrete cap are welded into a whole.

Further, the pile distance between the middle pile body and the two adjacent edge pile bodies is 1.2 m.

Further, the reinforced concrete cap and the pier are integrally formed.

Furthermore, the top end of the reinforcing mesh is provided with a connecting reinforcing head, and the connecting reinforcing head is welded with the pier integrally.

Further, the diameter of the cross section of the edge pile body is 1.2 times of the diameter of the cross section of the middle pile body.

Further, the four reinforcing columns are in a regular quadrangular pyramid shape.

The utility model discloses a bridge CFG stake structure, sound construction, the durability is strong, can be integrative with the pier, reinforcing bridge intensity.

Drawings

Fig. 1 is a schematic diagram of the distribution structure of the pile body of the present invention;

fig. 2 is a schematic cross-sectional installation view of the pile body of the present invention;

in the figure: 1. a middle pile body; 2. an edge pile body; 3. a reinforcement column; 4. reinforcing ribs; 5. connecting ribs; 6. a column; 7. a reinforced concrete cap; 71. a reinforcing mesh; 72. connecting the reinforcing steel bar heads.

Detailed Description

The present invention is further illustrated by the following examples, but is not limited to the contents of the specification.

As shown in the figure: a bridge CFG pile structure comprises a middle pile body 1, an edge pile body 2, a reinforcing column 3, a reinforcing rib 4, a connecting rib 5, a stand column 6 and a reinforced concrete cap 7.

The middle pile body 1 and the edge pile body 2 are arranged in a foundation soil layer of the pier, the reinforced concrete caps 7 are arranged on the middle pile body 1 and the edge pile body 2, and the reinforced concrete caps 7 and the pier are integrally formed. The edge pile bodies 2 are distributed in a rectangular shape, the middle pile bodies 1 are arranged between the edge pile bodies 2, the connecting line of the middle points of the edge pile bodies 2 and the middle points of the two adjacent edge pile bodies 2 is in an isosceles triangle shape, the number of the edge pile bodies 2 is even and is at least four, and the number of the middle pile bodies 1 is half of the number of the edge pile bodies 2 and one more. The diameter of the cross section of the edge pile body 2 is 1.2 times of the diameter of the cross section of the middle pile body 1.

The reinforcing columns 3 are arranged in the middle of the pile body 1 and in the edge pile body 2, the number of the reinforcing columns 3 in the edge pile body 2 is four, the four reinforcing columns 3 are in a quadrangular pyramid shape, reinforcing ribs 4 are welded between the reinforcing columns 3, the reinforcing ribs 4 with the same height are connected to form a square shape, the reinforcing columns 3 in the adjacent middle pile bodies 1 and the edge pile body 2 are all provided with connecting ribs 5, the middle parts of the connecting ribs 5 are vertically provided with stand columns 6, the stand columns 6 are welded with reinforcing mesh 71 in a reinforcing concrete cap 7, the top ends of the reinforcing mesh 71 are provided with connecting reinforcing bar heads 72, and the reinforcing mesh is conveniently welded with the reinforcing mesh of a pier into a whole.

This novel CFG pile structure, make pile 1 in the middle of every be regular triangle distribution rather than two adjacent marginal piles 2, marginal pile 2 is the rectangle distribution, the stake is apart from being about 1.2m, make middle pile 1, marginal pile 2 can even distribution in the basic unit below of pier, guarantee that pier basic unit atress is even, marginal pile 2 is thicker than middle pile 1 in addition, can strengthen the atress of CFG pile structure, middle pile 1, set up in the marginal pile 2 and strengthen post 3, be provided with the strengthening rib on the strengthening post 3, strengthen the intensity of pile on the one hand, on the other hand strengthens post 3 and is four pyramid distribution, can be with the soil matrix layer of top atress conduction to bottom, promote the life-span of pile. Connect through splice bar 5 between the top of enhancement post 3, can be with middle pile body 1, marginal pile body 2 connects the net, further promote the bearing capacity of CFG pile structure, in addition, set up stand 6 perpendicularly on splice bar 5, stand 6 again with the steel bar welding in the reinforced concrete cap 7, can be connected pile body and reinforced concrete cap 7 integratively, reinforced concrete cap 7 is even as an organic whole again with the pier for whole CFG pile structure is even as an organic whole with the pier, the shock resistance of pier has been promoted.

The reinforcing column 3, the reinforcing rib 4, the connecting rib 5 and the upright post 6 are all steel bars.

The construction process comprises the steps of determining the position of a pile through measurement, drilling the hole by using a drilling machine, placing a bundled reinforcing column, cutting off the upper part of a pile body to expose the reinforcing column when the top end of the reinforcing column is about 30 centimeters away from the outlet of the drilled hole, pouring a CFG material, planing off a soil layer about 30 centimeters around the pile body after the CFG pouring material is formed, sequentially welding reinforcing ribs, stand columns and a reinforcing mesh of a reinforced concrete cap, after welding, starting to frame a membrane and pour the reinforced concrete cap, after the reinforced concrete cap is formed, starting to bind the reinforcing mesh at the bottom layer of the pier on the reinforced concrete cap, and welding the reinforcing mesh at the bottom layer of the pier and a connecting reinforcing head on the reinforced concrete cap into a whole.

It is to be understood that the above-described embodiments of the present invention are merely examples provided for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Not all embodiments are exhaustive. All obvious changes or variations led out by the technical scheme of the utility model are still in the protection scope of the utility model.

Claims

1. The utility model provides a bridge CFG stake structure which characterized in that: the bridge pier comprises a middle pile body (1), edge pile bodies (2), reinforcing columns (3), reinforcing ribs (4), connecting ribs (5), a stand column (6) and a reinforced concrete cap (7), wherein the middle pile body (1) and the edge pile bodies (2) are arranged in a foundation layer of the bridge pier, the reinforced concrete cap (7) is arranged on the middle pile body (1) and the edge pile bodies (2), the edge pile bodies (2) are distributed in a rectangular shape, the middle pile body (1) is arranged between the edge pile bodies (2), the middle points of the edge pile bodies (2) and the middle point connecting lines of two adjacent edge pile bodies (2) are in an isosceles triangle shape, the number of the edge pile bodies (2) is even number and is at least four, the number of the middle pile bodies (1) is half of the number of the edge pile bodies (2) and is one more, the reinforcing columns (3) are arranged in the middle pile body (1), In the edge pile body (2), the number of reinforcing columns (3) in the middle pile body (1) and the edge pile body (2) is four, four reinforcing columns (3) are in a quadrangular pyramid shape, reinforcing ribs (4) are welded between the reinforcing columns (3), the reinforcing ribs (4) on the same layer are connected to form a square, the adjacent reinforcing columns (3) in the middle pile body (1) and the edge pile body (2) are all provided with connecting ribs (5), the middle part of each connecting rib (5) is vertically provided with a stand column (6), and the stand column (6) is integrally welded with a reinforcing mesh (71) in a reinforced concrete cap (7).

2. A bridge CFG pile structure according to claim 1, characterised in that: the pile distance between the middle pile body (1) and the two adjacent edge pile bodies (2) is 1.2 m.

3. A bridge CFG pile structure according to claim 1, characterised in that: the reinforced concrete cap (7) and the pier are integrally formed.

4. A bridge CFG pile structure according to claim 1, characterised in that: the top of the reinforcing mesh (71) is provided with a connecting reinforcing head (72), and the connecting reinforcing head (72) is welded with the pier into a whole.

5. A bridge CFG pile structure according to claim 1, characterised in that: the diameter of the cross section of the edge pile body (2) is 1.2 times of that of the cross section of the middle pile body (1).

6. A bridge CFG pile structure according to claim 1, characterised in that: the four reinforcing columns (3) are in a regular quadrangular pyramid shape.