考虑非达西渗流的天然结构性软土大应变非线性固结
Analysis on Nonlinear Large-strain Consolidation of Structured Soft Clay by Considering Non-Darcy Flow
- 防灾减灾工程学报 2019年39卷第6期 页码：888-897
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- 基金信息：国家自然科学基金项目（51708256,51878320）资助
DOI：10.13409/j.cnki.jdpme.2019.06.002
中图分类号： U447-
纸质出版：2019
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[1]金丹丹,肖金阳,李传勋.考虑非达西渗流的天然结构性软土大应变非线性固结[J].防灾减灾工程学报,2019,39(06):888-897.
金丹丹, 肖金阳, 李传勋. Analysis on Nonlinear Large-strain Consolidation of Structured Soft Clay by Considering Non-Darcy Flow[J]. 2019, 39(6): 888-897.
[1]金丹丹,肖金阳,李传勋.考虑非达西渗流的天然结构性软土大应变非线性固结[J].防灾减灾工程学报,2019,39(06):888-897. DOI： 10.13409/j.cnki.jdpme.2019.06.002.
金丹丹, 肖金阳, 李传勋. Analysis on Nonlinear Large-strain Consolidation of Structured Soft Clay by Considering Non-Darcy Flow[J]. 2019, 39(6): 888-897. DOI： 10.13409/j.cnki.jdpme.2019.06.002.
摘要
天然软黏土的结构特性、大应变特性及低水力坡降下软黏土中的非达西渗流已渐被熟知。但同时考虑天然软黏土结构特性和非达西渗流的软黏土大应变固结理论仍鲜有报道。考虑非达西渗流和天然软黏土的结构特性对固结性状的影响
在拉格朗日坐标系中建立变荷载下软土一维大应变固结模型
并获得其有限差分数值解。在此基础上
与非达西定律下不考虑结构特性影响的软黏土大应变固结解对比
分析验证本文解的可靠性。最后
着重分析了非达西渗流、天然软土结构特性及外荷载对软黏土大、小应变固结性状影响的特征。结果表明:非达西渗流下土的固结速率相对于达西渗流延后
且非达西渗流参数越大固结速率延缓越明显
但其对土层最终沉降值无影响。相同非达西渗流参数下大应变固结速率快于小应变固结速率
但非达西渗流参数并不影响大、小应变固结速率的差异。当外荷载小于天然软黏土结构屈服应力时
土层在荷载作用下应变值较小
大、小应变固结速率的差异可忽略;随着外荷载的增加或结构屈服压力的减小
土层应变值逐渐增大
大、小应变固结速率的差异越明显。
Abstract
Structural characteristics
large strain
and non-Darcy flow characteristics under low hydraulic gradient of natural soft clay have been gradually understood.Theory research considering both structural characteristics of natural soft clay and non-Darcy flow was rarely reported.By taking the influence of non-Darcy flow and the structural characteristics of natural soft clay into account
an one-dimensional large strain consolidation model under various loads was established in the Lagrange coordinate system
and the corresponding finite difference numerical solution was obtained.Meanwhile
the results were compared with the large-strain consolidation solution without considering the influence of structural characteristics.The reliability of the solution in this paper was analyzed and verified.Besides
the influences of structural characteristics of natural soft clay
non-Darcy flow characteristic
and external loads on the consolidation behavior were emphatically analyzed.Results show that the consolidation rate considering non-Darcy flow is slower than that without considering Darcy flow.This consolidation delay phenomenon becomes more obvious with the growth of non-Darcy flow parameters.However
the final settlement value is nearly the same.When under the same non-Darcy flow parameters
large-strain consolidation rate is greater than small-strain consolidation rate
while there is no effect on consolidation rate difference between large strain and small strain.In addition
the soil strain is small when the external load is less than the yield stress of natural soft clay
and the corresponding consolidation rate difference between large strain and small strain can be negligible.With the increase of the external load or the decrease of the yield stress
the soil strain increases gradually
and the difference between consolidation rate of large strain and small strain becomes obvious.
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references
One-dimensional large-strain consolidation of soft clay with non-Darcian flow and nonlinear compression and permeability of soil [J]. 李传勋,王昌建,卢萌盟,陆建飞,谢康和. Journal of Central South University . 2017(04)
考虑非达西渗流和变荷载影响的软土大变形固结分析 [J]. 李传勋,谢康和. 岩土工程学报 . 2015(06)
结构性对上海软土次压缩特性的影响 [J]. 高彦斌,李赫,张阿晋. 上海国土资源 . 2011(04)
萧山黏土非达西渗流性状的试验研究 [J]. 齐添,谢康和,胡安峰,张智卿. 浙江大学学报(工学版) . 2007(06)
任意施工荷载作用下天然结构性软粘土的一维非线性固结分析 [J]. 曹宇春,陈云敏,黄茂松. 岩土工程学报 . 2006(05)
结构性软土压缩特性研究 [J]. 王立忠,丁利,陈云敏,李玲玲. 土木工程学报 . 2004(04)
均质结构性软土地基的一维固结解析解 [J]. 王军,陈云敏. 水利学报 . 2003(03)
Compression reference of soil structure evaluation with reconstituted clays at different initial water contents [J] . Ling-Ling Zeng,Zhen-Shun Hong,Yu-Jun Cui,Martin D. Liu. Marine Georesources & Geotechnology . 2018 (7)
Conformable derivative: Application to non-Darcian flow in low-permeability porous media [J] . Shuai Yang,Liping Wang,Shuqin Zhang. Applied Mathematics Letters . 2018
Nonlinear Consolidation Analysis of Natural Structured Clays under Time-Dependent Loading [J] . An-Feng Hu,Chang-Qing Xia,Jun Cui,Chuan-Xun Li,Kang-He Xie. International Journal of Geomechanics . 2018 (2)
Large-Strain Vacuum-Assisted Consolidation with Non-Darcian Radial Flow Incorporating Varying Permeability and Compressibility [J] . Buddhima Indraratna,Rui Zhong,Patrick J. Fox,Cholachat Rujikiatkamjorn. Journal of Geotechnical and Geoenvironmental Engi . 2016
A study on the one-dimensional consolidation of double-layered structured soils [J] . Kang-He Xie,Chang-Qing Xia,Ran An,An-Feng Hu,Wei-Peng Zhang. Computers and Geotechnics . 2016
Effect of Destructuration on the Compressibility of Perni? Clay in Incremental Loading Oedometer Tests [J] . Igor Mataic,Dongxing Wang,Leena Korkiala-Tanttu. International Journal of Geomechanics . 2015
Change of hydraulic conductivity during compression of undisturbed and remolded clays [J] . Ling-Ling Zeng,Zhen-Shun Hong,Yuan-Qiang Cai,Jie Han. Applied Clay Science . 2010 (1)
Analytical solutions of one-dimensional large strain consolidation of saturated and homogeneous clays [J] . K.H Xie,C.J Leo. Computers and Geotechnics . 2004 (4)
Prediction of Consolidation of Very Soft Soil [J] . Kenneth W. Cargill. Journal of Geotechnical Engineering . 1984 (6)
MODIFICATION OF DARCY?S LAW FOR THE FLOW OF WATER IN SOILS [J] . DALE SWARTZENDRUBER. Soil Science . 1962 (1)
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