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浙江大学学报(工学版)
浙江大学学报(工学版)
土木工程     
土体自重对宁波软土非线性大应变固结的影响
谢新宇1,2,3,黄杰卿1,2,3,王文军2,李金柱1,2
1. 浙江大学 滨海和城市岩土工程研究中心,浙江 杭州 310058; 2. 浙江大学宁波理工学院 土木建筑工程学院,
浙江 宁波 315100; 3. 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
Influence of weight of soils on nonlinear finite strain consolidation for Ningbo soft clay
XIE Xin-yu1,2,3, HUANG Jie-qing1,2,3, WANG Wen-jun2, LI Jin-zhu1,2
1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058,Chian;
2. School of Civil Engineering & Architecture, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100,China;
3. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058,Chian
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摘要：

采用3种不同的自重考虑方法，对宁波软土的固结性状进行研究.基于Gibson大应变固结方程,考虑软土的压缩非线性和渗流非线性,推导3种方法的控制方程.基于宁波软土的试验结果,采用有限元法求解控制方程.计算结果表明,准确考虑土体自重和简化考虑土体自重的计算结果比较接近,而忽略土体自重的算法低估了超静孔压的消散速率.在固结中期,土体自重对超静孔压消散的影响非常明显,外荷载或土层厚度越大,该影响越显著.在大应变固结分析中,大多数情况下可以简化考虑土体自重,但不能完全忽视土体自重的影响.
Abstract:

Research on the consolidation behavior for Ningbo soft clay was carried out under different considerations for the weight of soils. On the basis of finite strain consolidation equation derived by considering, the governing equations for numerical analysis were derived by taking the nonlinear compressibility and nonlinear permeability of soils into consideration. Based on the experimental data, the governing equations were solved with the finite element method. It can be found that the calculation results considering the weight of soils simply are very close to the ones considering the weight of soils accurately. However, the dissipation rate of excess pore water pressure is underestimated without considering the weight of soils. Influence of the weight of soils on the dissipation rate of excess pore water pressure is quite obvious in the intermediate stage of consolidation. In this stage, the greater the external load or the thickness of soils is, the greater the influence of the weight of soils is. In finite strain consolidation analysis, the weight of soils can be considered simply but it can not be completely ignored in most cases．
出版日期: 2014-11-26
:  TU 447  
基金资助:

国家自然科学基金资助项目（51378469）；浙江省自然科学基金资助项目（Y1111240）；宁波市自然科学基金资助项目（2013A610196) .
通讯作者: 李金柱，男，博士后.     E-mail: jinzhu_lee@163.com
作者简介: 谢新宇（1969-），男，教授，博导，主要从事软黏土力学及地基处理研究.E-mail:xiexinyu@zju.edu.cn
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引用本文:

谢新宇,黄杰卿,王文军,李金柱. 土体自重对宁波软土非线性大应变固结的影响[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2014.05.011.

XIE Xin-yu, HUANG Jie-qing, WANG Wen-jun, LI Jin-zhu. Influence of weight of soils on nonlinear finite strain consolidation for Ningbo soft clay. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2014.05.011.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2014.05.011    或    http://www.zjujournals.com/eng/CN/Y2014/V48/I5/827

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