大型超深基坑综合支护与施工技术

The Comprehensive Support Works and Construction Technique of Large Overdeep Foundation Pit

摘要:

针对青海华电大通电厂1号转运站2296 m的超深基坑，采用土钉、钢梁以及旋喷桩帷幕止水的联合防护结构，面对冬季恶劣的施工环境，保障了该基坑的施工安全与周围设施的正常营运，缩短了工期，节约了施工成本，取得了良好的效果，并为以后深大基坑的防护设计、施工积累了经验。

Abstract:

For the overdeep foundation pit of a fuel-burning power plant, which depth is about 2296 m, the comprehensive support works as soil nail, steel beam, sealing curtain wall were adopted to assure the safety of the foundation pit and the normal operation of the surrounding installation under the severe condition in winter. So the construction period was shortened, the cost was reduced and experience was accumulated for the large overdeep foundation pit designing and constructing.