地铁车站桩基础计算方法对比研究  

Comparative Study on Calculation Methods of Pile Foundations in Subway Stations

作　　者：孙黎明 王达峰 SUN Liming;WANG Dafeng(Tianjin Binhai New Area Rail Transportation Investment Development Co.,Ltd.,Tianjin 300450,China;College of Civil Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津滨海新区轨道交通投资发展有限公司,天津300450 [2]天津大学建筑工程学院,天津300350

出　　处：《施工技术》2019年第21期107-110,共4页Construction Technology

基　　金：国家重点基础研究发展计划(973计划):燃(泊)气爆炸灾害安全性基础研究(2015CB058002);国家自然科学基金(51678390);天津市科技支撑计划重点项目(17YFZCSF01140)

摘　　要：桩基础计算中采用的m法只适用于桩顶位移较小的情况,且不考虑轴力。而在动力荷载作用下,桩侧土体已进入非线性,桩顶位移较大,且桩基础可能同时承受轴力和水平荷载,因而m法的适用性值得探讨。应用p-y曲线法分析拉弯作用下地铁车站桩基础应力、位移等,并与m法计算结果进行对比分析,以指出m法存在的不足。The m method adopted in the calculation of pile foundation is only applicable to the case where the displacement of the pile top is small,and the axial force cannot be considered.However,under the dynamic loads,the displacement of the pile head becomes larger because of the soil nonlinearity.Besides,the pile foundation may be subjected to axial forces and horizontal loads at the same time,so the applicability of the m method is worthy of discussion.The p-y curve method is adopted to analyze the stress and displacement of the pile foundation in subway stations under tension and bending,and compares with the calculation result of the m method to point out the m method’s shortcomings.

关 键 词：地铁车站 桩基础 拉弯作用 P-Y曲线法 M法 受力性能 

分 类 号：TU473.1[建筑科学—结构工程]