桩端下有软弱下卧层的群桩沉降分析
摘要:群桩沉降由桩身压缩和桩端沉降组成。本文采用桩身线弹性的假定计算单桩桩身压缩,用单桩的桩身压缩近似代替群桩桩身压缩,并用承台下的平均附加应力乘以桩端荷载传递系数后作为桩端的附加应力,推出了桩端下有软弱下卧层的群桩沉降计算方法,同时与其他计算方法和工程实测值进行了比较。
Abstract:The settlement of pile-group consists of the compression deformation of pile shaft and the settlement of pile tip. In this paper, the compressive deformation of single pile shaft is calculated by adopting hypothesis of linear-elasticity, and the compressive deformation of pile-group shaft is approximate to the compressive deformation of single pile shaft. Moreover, the additional stress of pile tip is obtained by multiplying the average stress under pile cap or raft and the coefficient of transfer load. All these researches deduce the means of calculation of pile-group settlement with soft underlying straturr, In the end, the present method is compared with another method and practical project test results.
中文标题：
桩端下有软弱下卧层的群桩沉降分析
Analysis on Settlement of Pile-group With Soft Underlying Stratum
作者：
张乾青1,2,张忠苗1,2
Zhang Qianqing1,2,Zhang Zhongmiao1,2
作者简介:张乾青,1983年生,男,汉族,山东济宁人,浙江大学岩土工程专业博士研究生,主要从事基础工程与粧基础的研究工作。E-mail:zqq5820948@126.com
通讯地址：
1. 浙江大学软弱土与环境土工教育部重点实验室, 浙江杭州 310058; 2. 浙江大学岩土工程研究所, 浙江杭州 310058
1.KeyLaboratoryofSoftSoilsandGeoenvironmentalEngineeringofMinistryofEducation,ZhejiangUniversity,Hangzhou310058,Zhejiang,China; 2.InstituteofGeotechnicalEngineering,ZhejiangUniversity,Hangzhou310058,Zhejiang,China
中图分类号:TU473.1
doi:10.3969/j.issn.1007-2993.2009.05.001
出版物：岩土工程技术
收稿日期:2009-05-25
关键词:群桩沉降,桩身压缩,荷载传递系数,软弱下卧层
Key words:pile-group settlement,compressive deformation of pile shaft,coefficient of load transfer,soft underlying stratum
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