Hammering construction technology with pile shoe and pile body dead weight expanding function

Abstract

The invention discloses a hammering construction technology with a pile shoe and pile body self-weight expanding function. The self gravity of the prestressed pipe pile is utilized, and the prestressed pipe pile is lifted and then freely falls, so that impact force for driving the expanded pile shoe into a soil layer is brought to the expanded pile shoe; and in the sinking process of the expanding pile shoe, a pile side gap channel is formed through the pile diameter expanding effect of the expanding pile shoe, and the resistance of layered soil around the pile to the pile body of the prestressed pipe pile in the pile sinking process is reduced. After the pile end of the prestressed pipe pile enters the ground surface, the impact process of the pipe pile occurs underground, the construction noise can be well controlled, and the advantages of the prestressed pipe pile in the construction process of the ultra-long pipe pile are more obvious. And the lifting height of the pipe pile can be adjusted, that is, the pile falling stroke can be corrected according to the geological condition of the current pile sinking depth, and the pile sinking efficiency is higher.

Description

Technical field [0001] The present invention belongs to the field of construction methods, specifically relates to a kind of self-weight hammering construction process with enlarged pile boots pile body. Background [0002] Pile foundation engineering has been greatly developed in recent years, in its development process, prestressed pipe pile due to its construction speed, high efficiency, short construction period, high bearing capacity of single piles after piling and reliable quality, etc., more and more are used in building construction. However, due to the fact that there are still construction site restrictions, obvious squeezing effect, construction noise, and high equipment requirements in the process of piling, it is necessary to pay close attention to the construction process of pile sinking. [0003] At present, the main prestressed pipe pile construction processes in China include: hammering method, static pressure method, vibration method, water injection method, pr...

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Problems solved by technology

[0004]The purpose of the present invention is to solve the problems existing in the prior art, and to provide a self-weight hammering construction process with enlarged spud cans, which can better solve the problem of construction Problems such as soil extrusion, on-site noise, ground penetration and equipment foundation requirements are too high

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