刚性悬臂护坡桩的设计计算方法探讨

A Study on Calculation of Rigid Cantilevered Retaining RC Piles

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 calculation of rigid cantilevered retaining RC piles and walls is the most basic problem for the calculation of various retaining structures in the deep excavation of highrise buildings. This paper, based on in-site tests and model tests, studies the ultimate state of rigid cantilevered retaining RC piles and other rigid cantilevered retaining structures by using the practical calculation principle are the ultimate bearing capacity theory. A practical calculating method is provided in this paper to calculate the soil bearing resistance of passive pressure zone of this kind of retaining structures during excavation, and to calculate the displacement of the piles. The lateral displacement of piles under the ultimate state has been also studied in this paper.