群桩基础沉降计算中的若干问题

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摘要桩基的沉降变形不仅受制于地基土性状,也受桩基与上部结构共同作用的影响,可以说是桩基计算中最为重要、最为复杂的课题之一。本文根据竖向荷载下群桩沉降性状试验的实测资料,厘清了群桩沉降的基本构成,探讨了群桩沉降计算中的几个关键问题,即土中竖向应力的求解、压缩层厚度的确定、长桩基础沉降计算中桩身压缩量应予以考虑,并给出了相应的解决思路。

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	秋仁东
	刘金砺
	高文生
	邱明兵

关键词 ：桩基沉降, 竖向应力, 压缩层厚度, 桩身压缩

Abstract：The settlement behaviors of pile group foundation have a close relationship to the ground strata and the interaction between foundation and superstructure. It is an important and complicated part in pile foundation calculation field. Based on a series of large scale mode tests on pile groups, the settlement behaviors of pile group foundation are revealed by the corresponding test data. Furthermore, some important problems to calculate the settlement of the pile group foundation are discussed , such as the calculation of the vertical stress, the compression layer thickness and the pile shaft compression for long piles. Finally , the solutions to these problem are presented.

Key words： pile group foundation settlement vertical stress compression layer thickness pile shaft compression

收稿日期: 2011-08-09

TU473

作者简介: 秋仁东 (1981 – ) ,辽宁人,博士,从事岩土工程方面的研究、设计咨询和开发工作。

引用本文:

秋仁东, 刘金砺, 高文生, 邱明兵. 群桩基础沉降计算中的若干问题[J]. 岩土工程学报, 2011, 33(sup2): 15-23. QIU Ren-dong, LIU Jin-li, GAO Wen-sheng, QIU Ming-bing. Some problems on settlement calculation of pile group foundation. Chinese J. Geot. Eng., 2011, 33(sup2): 15-23.

链接本文:

http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/ 或 http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/Y2011/V33/Isup2/15

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