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随着基坑周边环境的原来越复杂,基坑支护结构逐渐从自身的稳定和强度设计变成了周边环境变形控制。上海市某中学的地下室及车库基坑,开挖深度6.0m,与已有的采用天然地基持力的4层综合楼基础距离仅为0.51m,建筑物的条形基础埋深仅为1.49m,基坑支护设计时,支挡结构施工、基坑开挖首要考虑的因素就是变形对该建筑物的影响。文章介绍了该基坑支护方案的设计,分别以设计软件和有限元软件,对支挡结构受力、基坑稳定性、周边地层变形等逐一分析,并在结合基坑工程与周边环境的基础上,制定了监测方案,指导工程设计,并为类似工程建设提供参考。
As the surrounding environment of the foundation pit becomes more complicated, the foundation pit support structure gradually becomes its surrounding environment deformation control from its own stability and strength design. The basement and garage pit of a middle school in Shanghai with an excavation depth of 6.0m is only 0.51m away from the existing four-storey building with natural foundation holding force. The depth of the strip foundation of the building is only 1.49m , The design of foundation pit support, construction of retaining structure, the first consideration of foundation pit excavation is the effect of deformation on the building. This paper introduces the design of the foundation pit supporting scheme, analyzes the supporting structure force, the stability of the foundation pit and the deformation of the surrounding strata by design software and finite element software respectively. Combining the engineering of the foundation pit and the surrounding environment Based on the development of monitoring programs to guide the engineering design, and provide a reference for similar projects.