摘要
北京大兴国际机场中南指廊基坑施工中,针对原址1号废水泵基底标高调整,开挖深度由15.25m变为19.75m.原支护设计不能满足要求的情况,采用微型桩+预应力锚索+混凝土冠梁的基坑加深技术,保证了基坑边坡稳定.
During the middle-south airside concourse foundation pit construction of Beijing Daxing International Airport, the elevation of existing no.1 waste water pump base was adjusted and the foundation pit excavation depth was changed from 15.25m upto 19.75m. Original support and protection design could not satisfy the new requirements, so foundation pit deepening technique by micro-pile, prestressed cable and concrete capping beam was adopted to guarantee the stability of foundation pit slope.
作者
胡鸿志
邵九婷
肖恩汪
HU Hong-zhi;SHAO Jiu-ting;XIAO En-wang(Beijing Mechanism Construction C o.,Ltd.,100045,Beijing,China)
出处
《建筑技术》
2019年第9期1097-1099,共3页
Architecture Technology
关键词
深基坑
基坑加深
微型桩
预应力错索
deep foundation pit
foundation pit deepening
micro-pile
prestressed cable
