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Corrugated steel cofferdam hollow digging pile and manufacturing technique thereof

A technology of corrugated steel and hollow piles, which is applied in the direction of sheet pile walls, foundation structure engineering, construction, etc., can solve problems such as difficulty in ensuring the stability of hole walls and construction safety, high cost of forming holes and piles, and difficulties in engineering construction, so as to achieve saving The effect of labor and raw materials, large pile diameter, and simplified construction process

Inactive Publication Date: 2016-10-26
JSTI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional retaining wall is to install the inclined formwork in sections to pour the concrete for the retaining wall, and the quality is difficult to control, especially for large-diameter piles, it is more difficult to ensure the stability of the hole wall and construction safety
[0003] There are many karst formations in southern my country, and the use of bored piles often encounters beaded multi-layer caves, and the pile ends cannot be supported on the complete bedrock. In the case of a large volume of karst cave space, a large amount of concrete is often lost, and the cost of forming holes and piles is high
Especially in the implementation of pile group foundations, the hole-forming process often colludes, which makes the construction more difficult to control. However, the upper part of the karst strata generally has thicker sandy pebbles or weakly weathered rock layers, which makes the construction difficult.

Method used

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  • Corrugated steel cofferdam hollow digging pile and manufacturing technique thereof
  • Corrugated steel cofferdam hollow digging pile and manufacturing technique thereof
  • Corrugated steel cofferdam hollow digging pile and manufacturing technique thereof

Examples

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specific example

[0030] The excavated hollow pile of a bridge,

[0031] External load: P=40547(kN);

[0032] Weight: G 桩 =31490(kN);

[0033] The sum of the vertical load (dead load) at the bottom of the pile:

[0034] ΣG 0 =P+G 桩 =40547+31490=72037 (kN).

[0035] 1. Calculate the pile bottom stress according to the soil diffusion angle:

[0036] 1. Diffusion angle of soil slope:

[0037] The diameter of the bottom surface of the diffusion pyramid with a pile length of 16m is as follows:

[0038] D=d+h·tanθ=11+(16×0.0655)×2;

[0039] =11+(1.05×2=2.10)=16.10(m);

[0040] A D = 16.10 × π 4 = 204 ( m 2 ) ;

[0041] 2. External volume:

[0042] ΣV g =1957 (square);

[0043] 3. Cone volume in pile length h=16m:

[0044]

[0045] Volume of soil: V 土 =V 0 -V g =2864...

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Abstract

The invention relates to a corrugated steel cofferdam hollow digging pile and a manufacturing technique thereof. The corrugated steel cofferdam hollow digging pile comprises a cofferdam, a steel bar concrete hollow pile body in the cofferdam, and a pier stud above the steel bar concrete hollow pile body. The cofferdam is provided with a plurality of circular corrugated steel wallboards arranged in a layered mode. The diameters of the circular corrugated steel wallboards arranged in the layered mode are decreased sequentially from top to bottom. A transverse corrugated steel connection plate is arranged in a gap between every two adjacent circular corrugated steel wallboards. The manufacturing technique of the corrugated steel cofferdam hollow digging pile comprises the steps that a hoisting excavator excavates the first section of pile hole, and the first layer of circular corrugated steel wallboard is arranged; the multiple layers of circular corrugated steel wallboards with the diameters decreasing from top to bottom are arranged through the same construction method; a hollow inner mold is mounted and perfected; pouring of all concrete of a pier foundation is completed; and finally the pier stud is embedded and connected with steel bars. According to the corrugated steel cofferdam hollow digging pile and the manufacturing technique thereof, the material consumption of the cofferdam is low, the frictional resistance of the pile wall is high, the diameter of the pile is large, the open excavation speed is higher than the drilling speed, the technique is easy and convenient to implement, and the economic benefits are good.

Description

technical field [0001] The invention relates to the technical field of hole-digging hollow piles, in particular to a corrugated steel cofferdam hole-digging hollow pile and a manufacturing process thereof. Background technique [0002] Manual hole-digging piles have the characteristics of simple process, short construction period, and easy popularization. The key technology of hole-digging piles is the safety of complex stratum retaining walls. The traditional retaining wall is to install the inclined formwork in sections to pour the concrete for the retaining hole wall, and the quality is difficult to control, especially for large-diameter piles, it is more difficult to ensure the stability of the hole wall and construction safety. [0003] There are many karst formations in southern my country, and the use of bored piles often encounters beaded multi-layer caves, and the pile ends cannot be supported on the complete bedrock. In the case of a large volume of karst cave spac...

Claims

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Application Information

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IPC IPC(8): E02D19/04E02D5/34
CPCE02D19/04E02D5/34
Inventor 陈光林张创宏符晓锋顾正闯
Owner JSTI GRP CO LTD
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