丽泽城市花园地下车库深基坑支护工程设计与施工技术

The Design and Construction of Deep Foundation Support for a Underground Carport

在以砂卵石地层为主,且坑侧地面超载很大的深基坑中,采用护坡桩、预应力锚杆、压力注浆等施工工艺在支护工程中的综合应用,尤其在坑侧有重要建筑、护坡桩成孔困难的情况下,采用刚性支点法的设计思路对护坡桩的侧向变形加以控制,针对砂卵石层机械难以成孔的情况,护坡桩采用人工挖孔的方法成孔,预应力锚孔采用跟管水冲钻机成孔,保证了基坑支护系统的安全性、可靠性和经济性,并取得成功。本文概述了以上施工方法的设计、主要技术措施及几点重要的结论。

Prestressed anchor and pressed bored pile were adopted for groud which be made of pebble-sand in a deeply foundation pit support, especial for importance building at the edge of foundation pit. A design method of undisplacement was used for contraling displacement of foundation pit. Man-dig-hole pile for pebble-sand ground layer, tubular drill for anchor-hole, it guaranteed success of deeply foundation pit support. （by Jie Huancheng）