Hammering pile sinking and synchronous pile tip and side grouting structure and process in pile tip of pile shoe-provided pipe pile

Abstract

The invention discloses a hammering pile sinking and synchronous pile tip and side grouting structure and a hammering pile sinking and synchronous pile tip and side grouting process in a pile tip of apile shoe-provided pipe pile, and belongs to the field of a construction method.. According to the grouting method, a center penetrating hammer is used for hammering the pile tip to expand a pile shoe so that the pile tip can be hit into the pile shoe; the pile tip sinks and takes a pre-stressed pipe pile to sink together; and the pile tip and the pile side are synchronously expanded to realize grouting treatment inside a grouting passage. The grouting structure disclosed by the invention is relatively high in hammering penetration capability; a synchronous grouting system can commendably play a lubrication effect in a pile sinking process and can reduce the friction resistance of the pile side; after pile sinking is ended, the strength improvement can provide a higher single pile bearingcapacity; a hammering process is performed under the ground; construction noises can be controlled commendably; and the height of an elevator is adjustable, namely the hammer drop journey can be corrected according to the geological conditions of the current pile sinking depth, so that higher pile sinking efficiency is achieved. The structure and the process disclosed by the invention have low requirements on equipment; the bearing capacity of an equipment platform generally needs not to be specially treated, all equipment can be recycled after the construction is ended, and good economicalbenefits are realized.

Description

technical field [0001] The invention belongs to the field of construction methods, and in particular relates to a pipe pile with a pile shoe by internal hammering pile sinking and synchronous end measurement grouting structure and technology. Background technique [0002] With the continuous development of pile foundation engineering, prestressed pipe piles have been used more and more in on-site construction due to their advantages of fast construction speed, high efficiency, short construction period, high bearing capacity and reliable quality of single piles after pile formation. application. However, in the process of pile sinking, there are still construction technical difficulties such as obvious soil squeezing effect and difficulty in penetrating the soil layer, so it is necessary to pay special attention to the pile sinking construction technology. [0003] At present, the main construction techniques of prestressed pipe piles in my country include: hammering method...

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Problems solved by technology

[0005] Considering that the current construction environment in my country is still dominated by hammering method and static pressure method, aiming at the deficiencies in the construction process, the purpose of the present invention is to provide a method that can better solve the problems of construction soil extrusion, site noise, site pressure, etc. Construction structure and technology of on-site prestressed pipe pile sinking for problems such as underpass and equipment foundation requirements

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