基于地基系数法的桩前土体抗力计算公式推导  

Formula derivation of soil resistance before piles based on foundation coefficient method

作　　者：梅岭[1] 方龙建 黄献文 刘顺青[1] MEI Ling;FANG Long-jian;HUANG Xian-wen;LIU Shun-qing(School of Civil Engineering and Architecture,Jiangsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]江苏科技大学土木工程与建筑学院,江苏镇江212003

出　　处：《沈阳工业大学学报》2020年第6期701-705,共5页Journal of Shenyang University of Technology

基　　金：江苏省高等学校自然科学基金项目(17KJB560003).

摘　　要：针对现有抗滑桩桩前土体抗力计算方法的缺陷与不足,基于地基系数法推导了滑面边界条件为固定端和铰支端情况下的抗滑桩桩前土体抗力计算公式.为验证该公式的合理性与正确性,采用MIDAS GTS NX有限元软件建立了三维有限元边坡支护模型,并结合工程实例与现有计算方法相比较.结果表明,所推导出的计算公式能较精确地计算抗滑桩桩前土体抗力,从而得出更准确的桩身内力大小,降低了工程造价,在理论与工程实践中均有较好的借鉴价值.Aiming at the defects and shortcomings of the existing calculation methods for soil resistance before anti-slide piles,a calculation formula of soil resistance before anti-slide piles based on the foundation coefficient method was derived,when the fixed and hinged ends were boundary conditions of sliding surface.To verify the rationality and correctness of as-proposed formula,a finite element software MIDAS GTS NX was adopted to establish a 3D finite element slope support model,and the calculated results were compared with the existing calculated methods in combination with actual engineering case.The results show that the as-proposed formula can precisely calculate the soil resistance before anti-slide piles,and can further calculate the internal force of anti-sliding pile body more accurately,reducing project costs and presenting better reference values for theoretical and engineering practices.

关 键 词：抗滑桩 滑坡推力 桩前土体抗力 桩身内力 工程造价 滑面边界条件 地基系数法 有限元分析 

分 类 号：TU473[建筑科学—结构工程]