Auxiliary pile foundation pulling construction method under limited space condition

Abstract

The invention discloses an auxiliary pile foundation pulling construction method under a limited space condition. The method comprises the following steps of: before or in a pulling-out process of a pile foundation, ejecting high-pressure steam by using mud flushing equipment so as to cut and break a soil body around the pile; and pumping mud by using a gravel pump. By means of gas-water cutting and mud scraping by an auxiliary scraping plate, the problem that it is hard to pull the pile as existing equipment is too large in size and the pile pulling space is limited is solved.

Description

technical field [0001] The invention relates to the field of pile foundation construction in projects such as highways and water transportation. More specifically, the invention relates to an auxiliary pile foundation removal construction method under the condition of limited space. Background technique [0002] With the development of my country's highway and waterway engineering, the application of temporary trestles and steel platforms continues to increase, and steel pipe pile foundations are used in a large amount and in a wide range. The construction trestle is often built on the side of the bridge, which can be pulled out directly after the project is completed, and the upper operation space is not limited. It is noteworthy that in a large number of water project projects, steel pipe piles are used as a temporary facility in the production process of bridge box girders. Bailey beams are erected on steel pipe piles, and scaffolding is erected on them to form a full ha...

AI Technical Summary

Problems solved by technology

It is noteworthy that in a large number of water project projects, steel pipe piles are used as a temporary facility in the production process of bridge box girders. Bailey beams are erected on steel pipe piles, and scaffolding is erected on them to form a full hall support. The formwork is laid on the upper pavement, and then the box girder is poured. After the bridge is completed, the full hall support and Bailey beam are removed in turn, and only the steel pipe piles are left in the water. At this time, the steel pipe piles are located directly under the bridge. Restricted, large construction machinery cannot enter under the bridge, or the lifting capacity is greatly reduced due to the small elevation angle of the boom, which makes it difficult to extract piles in a limited space

At present, the method of underwater cutting is mainly used for the removal of underwater steel pipe pile foundations. This method is costly and difficult to construct. At the same time, a large amount of steel resources are discarded to the bottom of the river bed, which is not conducive to an environment-friendly society and resource-saving. social construction

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