土岩结合条件下深基坑支护方式研究

以青岛地区“上部土层、下部岩层”的土岩结合地质条件为背景，对该地区深基坑支护方式进行总结，得出土层桩锚与岩层喷锚相结合的主要支护形式。选取青岛地区两个典型深基坑--青岛地铁李村站为实例，对该地铁车站基坑变形进行数值模拟。结果表明：桩锚、喷锚、内支撑相结合的支护体系在青岛地区具有很好的实用性，尤其在控制基坑水平位移、围护桩内力及周边地表沉降等方面效果明显，这将为青岛地铁后续工程设计提供有效指导，并为类似土岩结合地区深基坑支护设计提供借鉴

Study of supporting type for deep foundation pit in areas of rock and soil

Upon rock-soil combinational geological condition in Qingdao, a summary is made to know the main supporting type for deep foundation pit in the area; and draw the conclusion that“ piled anchor in soil and anchor bolt shotcrete in rock” are in common use in such deep foundation pit. Taking two typical deep foundation pits of Licun station in Qingdao metro for examples, finite element method is used to do simulation calculation of the station foundation pits; and it is surely proved that pile-anchor and braced structures are well used in the area, especially in controlling horizontal deformation, the pile internal force and surrounding settlement. The work will greatly help the latter metro design in Qingdao metro construction and provide many ideas for the construction in similar geological conditions.