Distributed isolation type anti-drag precast pile and construction method thereof: Fid-Bau Portal

Distributed isolation type anti-drag precast pile and construction method thereof

LI JIANPING / SONG WEIJIE / ZHU QINGKAI / CUI ZIHAN / LIU GUANGLEI / WU SIYU

The invention discloses a distributed isolation type anti-drag precast pile and a construction method thereof, and belongs to the technical field of pile foundation construction. The distributed isolation type anti-drag precast pile comprises a precast pile body, a distributed isolation composite film and a fixing piece; each section of precast pile is covered with 2-5 sections of distributed isolation composite films, each section of distributed isolation composite film is fixed to the precast pile through a fixing piece, the inner-layer film and the precast pile are bonded, the lower end of the upper distributed isolation composite film is wrapped in the lower distributed isolation composite film, and the lap joint sections of the upper distributed isolation composite film and the lower distributed isolation composite film are connected in a bonded mode. The construction method comprises the following steps: cleaning the precast pile; preparing a distribution isolation composite membrane; performing hole forming operation; precast pile construction; and finishing the construction. The isolation composite film is covered and distributed on the surface of the precast pile, so that the influence of settlement on the pile foundation in the construction process of a soft soil area or a filling area and after construction is eliminated.

本发明公开了一种分布隔离式减阻预制桩及其施工方法，属于桩基施工技术领域，包括预制桩、分布隔离复合膜、固定件；每节预制桩上覆盖2‑5段分布隔离复合膜，固定件将每段分布隔离复合膜固定在预制桩上，内层膜与预制桩之间粘结，上部的分布隔离复合膜下端包裹在下部分布隔离复合膜内部，两者搭接段采用粘结连接。施工时按照如下方法操作：预制桩清理；分布隔离复合膜准备；成孔作业；预制桩施工；施工完成。通过在预制桩表面覆盖分布隔离复合膜进而达到消除软土地区或者填土地区施工过程中及工后沉降对桩基础影响的问题。

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