由于成都地铁明挖法车站所处砂卵石地层的地质条件,结合7号线以及调研到的其他共53个砂卵石地层深基坑中采用的围护结构设计实例和工程特征,对成都地区不同深度基坑的围护结构的形式进行了统计和分析,得到的结论有:基坑深度为6~11 m 时多采用土钉墙;基坑深度为11~16 m时多采用锚桩支护;当深度大于16 m时,多采用桩+内支撑的形式. 如此,可为类似地质条件下深基坑围护结构的选型提供参考.%With the development of metro construction, more and more underground metro stations are built in Chengdu. Because Chengdu is located in the downstream of Minjiang River,it is characteristic for its sandy cobble ground which is discrete and uneven, which makes it difficult for the selection of retaining structure,especially for the deep foundation. Thus,53 examples of foundation design are collected and analyzed and such conclusions are drawn as: when the depth of foundation is between 6 and 11 meters,soil nailed wall will be used more;when the depth is between 11 and 16 meters,anchor pile will be used often,and when the depth is over 16meters,pile combined with inner support will be recommended. These conclusions would also provide reference for similar ground when retaining structures are desined.
展开▼
