非线性土体中预测群桩沉降的一种实用方法  

A practical method predicting settlements of pile-groups in non-linear soil

作　　者：陈茜[1,2] 胡育佳[1] 

机构地区：[1]上海大学土木系,上海200072 [2]恒大地产集团合肥分公司,合肥230001

出　　处：《安徽建筑工业学院学报（自然科学版）》2010年第1期5-10,共6页Journal of Anhui Institute of Architecture(Natural Science)

基　　金：国家博士后基金资助项目(20080440613);上海市博士后基金资助项目(09R21412700)的资助

摘　　要：通过非线性群桩影响因子将群桩的沉降与单桩的沉降紧密地联系起来,在Randolph和Worth及Lee等提出的计算线性弹性土体中单桩和群桩的桩顶沉降方法的基础上,提出了在非线性土体中群桩中桩和桩之间的相互影响因子,及预测群桩整体沉降、桩顶刚度的计算方法。为了验证本文方法的正确性和结果的可靠性,根据人们公认的O’Neill(1982)和Briaud.(1989)等人的现场试验中的试验数据,用本文的方法对群桩的整体沉降和群桩中每个桩的承载能力进行了预测,同时与他们的试验结果进行了比较,发现按照本文的预测方法得到的结果与实测结果非常的吻合。说明本文的理论和方法对于分析桩-土系统的非线性力学行为是非常有效的。In this paper,the relation between the settlements of single pile and pile-group is closely linked by using nonlinear interaction factor.Based on the methods,presented by Randolph,Worth and Lee,for calculating the settlements of single pile and pile-group in linear elastic soils,the nonlinear interaction factor is developed and a method for predicting the settlement of pile group and pile head stiffness are presented.In order to illuminate the validity of the method and the reliability of results in this paper,in virtue of data of the field experiments presented by O＇Neill（1982）,Briaud（1989）,we predict the settlements of pile-groups and the carrying capacity of each pile in pile-groups and compare the present results with experiment data given by O＇Neill（1982）,Briaud（1989）,they are comparatively accordant,which means that the method in present paper is very effective for analyzing the mechanical characters of pile-soil systems in nonlinear soil.

关 键 词：群桩 影响因子 桩顶刚度 

分 类 号：O39[理学—工程力学]