综合支护封闭开挖法施工工法  

CONSTRUCTION METHOD OF THE CLOSED EXCAVATION OF INTEGRATED SUPPORT

作　　者：李亮 张广林 刘志铭 王岱山 

机构地区：[1]中铁四局集团有限公司市政工程分公司,湖北襄樊441000

出　　处：《建筑技术》2007年第12期912-915,共4页Architecture Technology

摘　　要：当地质条件为软土地基、地下水位较高、地层渗透系数较小、基坑较深时,构筑物的施工难度较大。其中沉井法及降水开挖法均不适宜。采用钢筋混凝土灌注桩做支护,桩外用旋喷桩做封水帷幕,桩帽连续梁用万能杆件做支撑,基坑底用水泥粉喷桩加固体封底,即"综合支护封闭开挖法",解决了上述施工难题。It is difficult to construct a structure that has a deep foundation pit in soft soil area with high underground water level and small permeability coefficient. Neither sunk-well method nor dewatering excavation method should be employed. Comprehensive supported closed excavation method was adopted to solve the construction difficulty, namely, cast-in-place reinforced concrete piles were used for bracing and sprinkled piles were arranged outside the piles to form water-stop curtain while continuous beams on the pile top were supported with universal standard rods and the foundation bottom was reinforced by sprayed cement piles.

关 键 词：软土地基 深基坑 灌注桩支护 

分 类 号：TU551.4[建筑科学—建筑技术科学]