大型墙式嵌岩桩基础的简化计算方法  

A Simplified Calculation Method for Large Embedded Rock Wall Foundations

作　　者：任文敏[1] 杨飞虎[1] 汪正兴[1] 杨振宇[2] 周军生[2] 

机构地区：[1]清华大学工程力学系,北京100084 [2]北京建达道桥咨询公司,北京100101

出　　处：《桥梁建设》2004年第2期39-42,共4页Bridge Construction

摘　　要：墙式嵌岩桩基础指的是横桥向很宽的扁矩形桩,依据其承载机理,可简化为平面应变问题。通过大量数值计算,得到此类桩基础在承受水平推力和纯弯矩时的桩内应力和变形分布规律,通过数据拟合,总结出适用于不同岩石特性、不同尺寸的桩基础各截面上的等效内力及岩面处特效变形的通用无量纲简化公式。The embedded rock wall foundation is a kind of bridge foundation with long and narrow rectangular cross section in the transverse direction of the bridge. According to its carrying mechanism, the stress and strain of the foundation could be simplified as a plane strain elastic problem for analysis. Through enormous numerical calculations, the stress and deformation distribution regularities in the foundation carrying horizontal or bending static loads are obtained by using the software MARC, and through data-fitting, the equivalent internal forces suitable for different rock properties and different sizes of the foundations are summarized and several general dimensionless expressions for special deformations at rock surface are worked out as well.

关 键 词：墙式基础 嵌岩桩 数值计算 应力 变形 

分 类 号：U443.15[建筑科学—桥梁与隧道工程]