西汲河大桥钻孔灌注桩静载试验研究

Study on the static load tests of the bored cast in situ piles of Xijihe Bridge

对３１２ 国道六安—叶集段西汲河大桥钻孔灌注桩进行了静载荷试验，对该地区的软质岩石力学特性进行综合分析，研究了座落在软质岩石上的桩基设计。在这种软岩上的桩属于摩擦－端承桩类型，以桩尖承载力和桩周摩阻力共同作用，桩周摩阻力可按４１０ ｋＰａ 取值。

Static load tests were performed on the bored cast in situ piles of Xijihe Bridge located within the Lu'an Yeji section of national No.312 expressway.A synthetic analysis of the mechanical characteristics of the soft rock of that district is carried out,and the design of pile foundation in soft rock is studied.When the pile′s load is supported by its end bearing capacity and circumferential friction,the circumferential friction τ can be calculated as the value 410 kPa.