Corrugated steel cofferdam hollow digging pile and manufacturing technique thereof

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...

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.

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