HDPE预铺反粘防水卷材外防内贴法在地下侧墙防水中的应用

Application of HDPE Pre-laid Reverse Adhering Waterproofing Membrane in the Waterproofing of Underground Side Walls

天津某地下工程具有结构埋置较深、基坑垂直开挖、紧邻河边地下常水位高等特点,侧墙基坑垂直开挖段通过采用HDPE高分子自粘胶膜防水卷材预铺反粘外防内贴工艺,满足项目防水需求。本文介绍了该项目的防水设计,并对HDPE高分子自粘胶膜防水卷材的铺设固定、接茬做法及关键节点处理作了阐述。

An underground project in Tianjin is featured with deep structure embedment,vertical excavation of foundation pit,adjoining river bank,and high normal groundwater level etc.HDPE polymer film reinforced self-adhesive waterproofing membrane is applied with pre-laid reverse adhering technology for the vertical excavation section of sidewall foundation pit,which meets the waterproofing requirements of the project.This paper introduces the waterproofing design of the project,and expounds the laying and fixing of HDPE polymer film reinforced self-adhesive waterproofing membrane,and treatment methods for details,such as joint reserving and connecting.