双环内支撑体系在深基坑支护中的应用

对福州某大厦地下室深基坑支护的几种内支撑体系的比较分析，采用双环双层内支撑体系与钻孔灌注桩共同组成的基坑支护结构，具有整体稳定性好、桩顶位移小、开挖工作面大、工程造价低的优点，解决了软土地基中地下室平面复杂、施工现场小，相邻建筑近的基坑支护问题．

Application of the Internal Bracing System to the Retaining for Deep Foundation Pits

Compared with the internal bracing systems of retaining for the deep foundation pit in the basement of certain mansion in Fuzhou,the advantages of retaining the construction of the foundation pit with the system of a double ring,a double layer and boring grout piles lie in its better stability,less displacement,larger site area and lower project cos t. It solves the problems of complex planes of the basements with soft soil foundation,small working site and the retaining close to another building.