软土中单桩桩侧承载力时效性理论解

›› 2011, Vol. 32 ›› Issue (12): 3604-3610.

软土中单桩桩侧承载力时效性理论解

曹权^{1, 2, 3}，施建勇^{1, 2}，雷国辉^{1, 2}，艾英钵^{1, 2}，陈鸿³

1.河海大学岩土工程研究所，南京 210098；2.河海大学岩土力学与堤坝工程教育部重点实验室，南京 210098； 3.深圳市市政设计研究院有限公司，广东深圳 518029

收稿日期:2011-04-19 出版日期:2011-12-10 发布日期:2011-12-13
作者简介:曹权，男，1970年生，博士，高级工程师，国家注册土木工程师（岩土），主要从事岩土的原位测试研究
基金资助:
国家自然科学基金资助项目（No. 50878075）。

Theoretical solution for time effect of shaft bearing capacity of single pile in soft soils

CAO Quan^{1, 2, 3}, SHI Jian-yong^{1, 2}, LEI Guo-hui^{1, 2}, AI Ying-bo^{1, 2}, CHEN Hong³

1. Geotechnical Research Institute, Hohai University, Nanjing 210098, China; 2. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 3. Shenzhen Municipal Design and Research Institute Co., Ltd., Shenzhen, Guangdong 518029, China

Received:2011-04-19 Online:2011-12-10 Published:2011-12-13

摘要/Abstract

摘要： 以有效应力原理为基础，结合考虑应变软化、桩径和弹性区孔压分布等因素的桩周土固结解，推导出软土中单桩桩侧承载力时效性的理论解。与传统桩的承载力时效性简化分析方法不同，该理论解不仅考虑了多土层地基中各土层刚度指数的差异对固结过程的影响，还考虑了各土层因固结系数不同对孔压消散速率的影响。通过现场不同间歇期的单桩载荷试验测试结果验证了其合理性

关键词: 理论解, 单桩, 饱和软黏土, 固结解, 承载力时效性

Abstract: Based on the theory of effective stress, consolidation solution around the pile which is taken into account the influence of strain softening, magnitude of pile radius and range of excess pore water pressure, a theoretical relationship about time-effect of bearing capacity of single pile is developed, which can be used to predict the variation of shaft bearing capacity of a jacked-in pile with time in saturated soft clay. Different from the traditional way, the effect of different stiffness indices and different consolidation coefficients on the consolidation process in varied clays and highly stratified deposits are considered in the new consolidation solution. Besides, the rationality of the solution is verified by the pile load tests in different time periods after installation.

Key words: theoretical solution, single pile, saturated soft clay, consolidation solution, time effect of shaft bearing capacity

中图分类号:

TU 470

曹权，施建勇，雷国辉，艾英钵，陈鸿. 软土中单桩桩侧承载力时效性理论解[J]. , 2011, 32(12): 3604-3610.

CAO Quan , SHI Jian-yong , LEI Guo-hui , AI Ying-bo , CHEN Hong. Theoretical solution for time effect of shaft bearing capacity of single pile in soft soils[J]. , 2011, 32(12): 3604-3610.

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