连续近距离、多段大高差深基坑群与基础桩群统筹优化施工技术

GENERAL CONSTRUCTION OPTIMIZATION FOR CONTINUOUS AND NEAR DISTANCE DEEP FOUNDATION PIT GROUP AND FOUNDATION PILE GROUP WITH LARGE HEIGHT DIFFERENCE

北京大兴国际机场中南指廊施工中,针对不规则排布的大高差基础桩群与大高差狭长基坑群的复杂位置关系,统筹优化施工顺序、灌注桩作业面选择和降水井插入时机,使基础工程施工流程有条不紊,减少了施工干扰,加快了施工进度.

The complex position relation among irregularly arranged foundation pile group and narrow and long foundation pit group with large height difference was considered during middlesouth airside concourse construction of Beijing Daxing International Airport, to generally optimize the construction sequence, selection of filling pile construction area, and insertion of dewatering well, realizing smooth foundation construction, reducing construction interference and shortening the construction schedule.