Prefabricated screw pile construction method

Abstract

The invention discloses a prefabricated screw pile construction method, relates to a pile construction method, and aims to solve such problems as small adaption range, difficult pile plantation, lower side friction of piles, low strength of pile bodies, lower bearing capacity of the pile bodies, and easiness in necking, pile breakage phenomenon and low construction efficiency in the pile forming process to different extents in a traditional pile forming method by cast-in-place piles and prefabricated piles. The method comprises the following steps: (1) prefabricated screw piles and connecting pipelines are mounted; (2) the prefabricated screw piles are directly screwed into soil by the rotating power of a slewing drilling machine for pile plantation, or the spraying hole expansion pile plantation is performed by a high-pressure jet grouting mode; and (3) the post-grouting is performed for pile ends. As the method adopts the high-pressure spraying in through holes in pipe walls, the scene pulp discharge quantity is greatly reduced, no soil is discarded, no water falls, residents are not disturbed, the construction scene is tidy, the single-pile bearing capacity is high, the number and the length of the piles can be reduced, the raw materials are saved, and the effects of low carbon and energy conservation are achieved. The method is suitable for prefabricated screw pile construction.

Description

technical field [0001] The invention belongs to the field of civil construction engineering, and in particular relates to a prefabricated screw pile construction method. Background technique [0002] In the field of construction engineering, with the process of urbanization and the requirements of environmental protection, prefabrication, modularization and assembly will be the development direction. At present, domestic foundation pile construction methods mainly include cast-in-situ piles and prefabricated piles. The above two types of pile foundations are limited by the construction technology, and there are some application deficiencies. Completely, the strength of the pile body cannot be fully exerted under the vertical compressive load, the horizontal load resistance capacity is insufficient, the static pressure resistance of the sand layer is too large, it is difficult to form a pile, and it is easy to be brittle. The soil squeezed during construction seriously affect...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the existing methods of using cast-in-situ piles and prefabricated piles to form piles in varying degrees, the adaptability range is small, and pile installation is difficult; the side friction of piles is small, the strength of pile body is low, and the bearing capacity of pile body In the process of pile formation, problems such as necking, pile breakage and low construction efficiency are prone to occur, so a prefabricated screw pile construction method is proposed

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