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基坑支护方案应安全适用、保护环境、技术先进、经济合理。结合基坑的周边环境、地质和水文条件、基坑开挖深度等条件对排桩+可回收预应力锚索方案及排桩+钢筋混凝土支撑方案进行对比分析。通过对比发现,于锚索施工后基坑内部空间开阔,便于土方开挖及地下结构施工,排桩+可回收预应力锚索方案在造价和工期方面均优于钢筋混凝土支撑方案。
Foundation pit support program should be safe and applicable to protect the environment, advanced technology, economic and reasonable. Combined with the surrounding environment of the pit, geological and hydrological conditions, the depth of excavation and other conditions for the row piles + recoverable prestressed anchor cable scheme and row piles + reinforced concrete support program for comparative analysis. The comparison shows that the internal space of the foundation pit is open after the construction of the anchor cable, which is convenient for earthwork excavation and underground structure construction. The row pile + recoverable prestressed anchor cable scheme is superior to the reinforced concrete support scheme in terms of construction cost and construction period.