多支撑体系深基坑底层硬岩开挖技术

Hard Rock Excavation Technology of Deep Foundation Pit Bot om Layer of Multi-support System

采用支撑梁体系作为支护结构的深基坑,在土方开挖到底层遇到较硬的强风化中风化岩层时,传统施工方法如机械凿岩、明爆法和静爆法等施工效果均不理想。多支撑体系深基坑底层硬岩开挖技术在广州某市政项目深基坑施工中成功实施并取得了良好的效果,可供类似工程借鉴参考。

When the supporting beam system is used as the supporting structure in the deep foundation pit,the traditional construction methods,such as mechanical rock drilling,blasting method and static blasting,are not ideal in the strong weatherting medium weatherting hard rock strata in the earth excavation. The hard rock excavation technology of deep foundation pit bottom layer of multi-support system has been successfully implemented in the construction of deep foundation pit of a municipal project in Guangzhou,which can be used for reference for similar projects.