山坡地上大体量建筑嵌岩桩基设计与施工

The design and construction of rock-socketed pile of large building on hillside

针对在山坡上特别是在高差较大的斜山坡这种复杂场地上建造大体量建筑时,结构设计难度大、基础处理困难的问题,分析了在斜山坡上建造大体量建筑时所应选择的基础形式,研究了该基础的设计及施工方法,分析了设计嵌岩桩长度时必需考虑桩端应力扩散在允许范围内,嵌岩桩的分类、埋置深度、嵌岩桩承载力计算方法;此外,研究了人工挖孔嵌岩桩的桩径、扩大头尺寸、护壁、桩帽和地拉梁的设计,对施工及不良地质的处理提出了具体建议。研究结果表明:采用嵌岩桩基础是一种经济合理、切实可行的基础形式;场地、地基、基础与上部结构协调设计、计算、共同工作,形成多层次的空间稳定结构体系。

Design large building on the hillside is very special and it usually faces the labyrinthine geologic formation, which makes the structure design and foundation treating difficulty, especially in the high-complicated slope. The authors study the suitable foundation form for constructing large building on the hillside, systematically discusses the foundation's design and construction methods, such as the essential factor of rock-socketed pile length design, the setting depth of the pile on step ground and the calculation method about bearing capacity of rock-socketed pile, and researches the structure design of artificial digging rock-socketed pile, construction rules and badness geology manipulations. The results show that the rock-socketed pile is a kind of economic, reasonable and feasible foundation form. The ground, subgrade, foundation and upper construction can be corresponded with designing, computing and common work, which makes a stable space structure system in different levels.