Static pressure pile sinking device capable of adopting interior through method, and internal through static pressure pile sinking method

Abstract

The invention relates to a static pressure pile sinking device capable of adopting an interior through method, and an interior through static pressure pile sinking method. The device comprises a prestressed pipe pile, a stand column frame, a hollow drill pipe and a drill arranged on the end part of the drill pipe, wherein an inner guide pipe is arranged in the inner cavity of a first section of pipe pile and is connected with the pipe pile through a bolt. When a thick silty clay layer or a clay layer is arranged from the ground to a sand layer, the inner guide pipe is arranged in the pipe pileso as to avoid a situation that silty clay or clay enters the hollow cavity of the pipe pile to block the inner wall hollow cavity of the pipe pile. The interior through method effectively breaks a mechanical self-locking phenomenon in the sand layer, hole drilling and guiding and static pressure pile sinking are synchronously carried out in a whole process, and in addition, two types of construction equipment are connected into a whole without separation. During hole drilling and guiding, movement is not required, in addition, hole guiding is carried out in the hollow cavity of the prestressed pipe pile, a soil layer around a pile body is free from disturbance during hole guiding, and therefore, a constructed pipe pile and the bearing capacity of the constructed pipe pile around the pilecan not be affected until the pile end of the prestressed pipe pile penetrates through the tight sand layer to achieve a designed elevation and pile length.

Description

technical field [0001] The invention relates to the technical field of pipe pile construction, in particular to a static pressure pile sinking device and method using the middle-through method. Background technique [0002] Prestressed concrete pipe piles have been widely used in pile foundation projects of buildings (structures) because of their advantages such as high pile strength, fast construction speed, good on-site civilized construction conditions, and easy inspection. With the popularization of the application of prestressed pipe piles, the construction of prestressed pipe piles often encounters complex strata that are difficult to penetrate, such as dense sand layers and gravel layers. [0003] In order to solve the difficulties and obstacles in the construction of prestressed pipe piles, auxiliary pilot holes are mostly used for construction. Using conventional drilling and punching technology to introduce holes has problems such as large hole diameter, slow cons...

AI Technical Summary

Problems solved by technology

It solves the problem that the pile cannot reach the design depth due to the mechanical self-locking phenomenon of the sand layer soil near the pile tip due to the severe extrusion and compaction of the pile pressure in the sand layer. The pile length is too short, the pile is cut, the pilot hole, the single pile bearing capacity cannot be guaranteed, etc., so that the prestressed pipe pile can reach the design depth smoothly

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