冲积层表土段井颈特殊施工

Special process to construct shaft collar section through alluvial layer

介绍了冲积层表土段采用帷幕法施工,尤其是帷幕墙出现夹泥带时,采用高压旋喷桩封堵帷幕墙夹泥带,并采用井圈和喷射混凝土加固帷幕墙施工方法。认为该方法是相似地质条件下一种比较经济、有效和合理的施工方法。

This article presents an account about the use of curtain wall shaft sinking method for constructing the section of shaft through the alluvial top soil. In case loose material mixed with mud, sand and gravel comes out from behind the curtain wall, high pressure spiral jet-- grouting process is used to block the loose material from behind the curtain wall and crib rings and shotcrete is used to consolidate the curtain wall to help the shaft collar section pass through the alluvial layer. This is a comparatively cheaper, effective and rational shaft construction method for use under similar geological conditions.