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刚性钢筋混凝土悬臂护坡桩及刚性悬臂挡土墙的设计计算方法是高层建筑下深挖基坑的各种支护结构设计计算问题的最基本形式。本文在工程实测及模型试验的基础上,应用实用的计算原理,以极限承载力理论分析悬臂的钢筋混凝土灌注桩等刚性支护结构的极限状态,从而提出一套实用计算方法,计算这种支护结构在开挖过程中被动土压力区的土抗力以及开挖引起的桩的侧向位移,还分析研究了极限状态下的侧向位移及计算方法。
The design method of rigid reinforced concrete cantilevered slope-protecting piles and rigid cantilever retaining walls is the most basic form of design calculation problem of various supporting structures for deep excavation of foundation pits under high-rise buildings. On the basis of engineering measurement and model tests, this paper applies practical calculation principles to analyze the limit state of rigid support structures such as reinforced concrete cast-in-place bored piles based on the theory of ultimate bearing capacity, and proposes a practical calculation method to calculate this kind of support. In the excavation process, the soil resistance in the passive earth pressure zone and the lateral displacement of the pile caused by the excavation are analyzed. The lateral displacement and the calculation method are also analyzed.