[1]李顺群,桂超,夏锦红.常气压下非饱和土的一维瞬态渗流[J].深圳大学学报理工版,2018,35(1):70-77.[doi:10.3724/SP.J.1249.2018.01070]
　LI Shunqun,GUI Chao,and XIA Jinhong.Transient flow in unsaturated soil under the constant air pressure[J].Journal of Shenzhen University Science and Engineering,2018,35(1):70-77.[doi:10.3724/SP.J.1249.2018.01070]
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常气压下非饱和土的一维瞬态渗流()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第35卷
期数:
2018年第1期
页码:
70-77
栏目:
土木建筑工程
出版日期:
2018-01-12

文章信息/Info

Title:
Transient flow in unsaturated soil under the constant air pressure
文章编号:
201801011
作者:
李顺群; 桂超; 夏锦红
新乡学院土木工程与建筑学院，河南新乡 453003
Author(s):
LI Shunqun;  GUI Chao;  and XIA Jinhong
School of Civil Engineering and Architecture, Xinxiang University, Xinxiang 453003, Henan Province, P.R.China
关键词:
土力学; 非饱和土; 常吸力; 轴平移; 瞬态渗流; 差分原理
Keywords:
soil mechanics;  unsaturated soil;  constant suction;  axis-translation;  transient flow;  differential principle
分类号:
TU 441+.33
DOI:
10.3724/SP.J.1249.2018.01070
文献标志码:
A
摘要:
为揭示非饱和土在气压作用下孔隙水的渗流特征，基于Darcy定律和饱和度与基质吸力、渗透系数之间的经验公式，建立了三轴试样在常气压时的孔压消散方程，基于差分原理建立了该非线性偏微分方程的求解方法. 采用Wykeham Farrance三轴实验系统，利用轴平移技术进行了不同气压作用下非饱和土的失水实验. 结合实验得到的参数和常规物理力学指标，对该高阶非线性偏微分方程进行了求解，并利用有限元软件对三轴试样在常气压作用下的瞬态渗流过程进行了模拟，将实验结果、偏微分方程数值解和有限元计算结果进行了对比分析. 结果表明，实验数据、偏微分方程数值解和有限元计算结果三者吻合较好，所建立的偏微分方程能够刻画非饱和土在常气压力作用下的瞬态渗流过程. 本项研究阐明了轴平移技术的物理本质，进一步完善了非饱和土实验理论.
Abstract:
In order to discover seepage characters of unsaturated soil under air pressure, we establish a partial differential equation for the pore water pressure dissipation of triaxial specimens in terms of Darcy’s law, the empirical formula between permeability coefficient and saturation or matrix suction. Then, we give the solution method for the partial differential equation based on differential principle. After the Wykeham Farrance (WF) unsaturated soil triaxial experiment system is employed, we perform the drying process under matric suction based on the axis-translation technique. Combined with the parameters obtained from the experiment, we solve the higher order nonlinear partial differential equations, and simulate the unsaturated process by finite element method (FEM) at the same time. The results are in a good agreement with the experimental data, the analysis solution and the FEM results. It shows that the established partial differential equation can depict the dissipation process of the unsaturated soil under the effect of air pressure. This study illustrates physical essence of the axis translation technique and may improve the existing experiment theory in unsaturated soil mechanics.

参考文献/References:

［1］ LU N, LECAIN G D. Percolation induced heat transfer in deep unsaturated soils［J］. Journal of Geotechnical and Geoenvironmental Engineering, 2003, 129(11): 1040-1053.
［2］ FREDLUND D G, XING Anqing, HUANG Shangyan. Predicting the permeability function for unsaturated soils using the soil-water characteristic curve［J］. Canadian Geotechnical Journal, 1994, 31(3): 533-546.
［3］ ZHENG H, LIU D F, LEE C F, et al. A new formulation of Signorinip’s type for seepage problems with free surfaces［J］. International Journal for Numerical Methods in Engineering, 2005, 64: 1-16.
［4］ 孙冬梅, 冯平, 张明进. 考虑气相作用的降雨入渗对非饱和土坡稳定性的影响［J］. 天津大学学报自然科学版, 2009, 42(9): 777-783.
SUN Dongmei, FENG Ping, ZHANG Mingjin. Refined analysis of stability of unsaturated soil slope due to rainfall infiltration considering the effect of gas phase［J］. Journal of Tianjin University Natural Science, 2009, 42(9): 777-783.(in Chinese)
［5］ TAN Y C, MA K C, CHEN C H, et al. A numerical model of infiltration processes for hysteretic flow coupled with mass conservation［J］. Irrigation and Drainage, 2009, 58(3): 366-380.
［6］ RAHARDJO H, Li X W, Toll D G, et al. The effect of antecedent Rainfall on slope stability［J］. Geotechnical and Geological Engineering, 2001, 39: 371-399.
［7］ 冯永, 张福喜, 倪凯军. 基于非稳定渗流理论的非均质土坝稳定性分析［J］. 人民黄河, 2011, 33(3): 100-102.
FENG Yong, ZHANG Fuxi, NI Kaijun. Analysis on stability of heterogeneous earth dam based on non-steady seepage theory［J］. Yellow River, 2011, 33(3): 100-102.(in Chinese)
［8］ 李兆平, 张弥. 考虑降雨入渗影响的非饱和土坡瞬态安全系数研究［J］. 土木工程学报, 2001, 34(5): 57-60.
LI Zhaoping, ZHANG Mi. Effects of rain infiltration on unsaturated slopes［J］. China Civil Engineering Journal, 2001, 34(5): 57-60.(in Chinese)
［9］ 李毅, 伍嘉, 李坤. 基于FLAC的饱和-非饱和渗流分析［J］. 岩土力学, 2012, 33(2): 617-622.
LI Yi, WU Jia, LI Kun. Saturated-unsaturated seepage analysis based on FLAC［J］. Rock and Soil Mechanics, 2012, 33(2): 617-622.(in Chinese)
［10］ 陈盼, 韦昌富, 王吉利, 等. 近饱和条件下非饱和多孔介质渗流过程的数值分析［J］. 岩土力学, 2012, 33(1): 295-300.
CHEN Pan, WEI Changfu, WANG Jili, et al. Numerical analysis of seepage processes in unsaturated porous media under nearly saturated conditions［J］. Rock and Soil Mechanics, 2012, 33(1): 295-300.(in Chinese)
［11］ 秦爱芳, 孙德安, 谈永卫. 非饱和土一维固结的半解析解［J］. 应力数学和力学, 2010, 31(2): 199-209.
QIN Aifang, SUN De’an, TAN Yongwei. Semi-analytical solution to one-dimensional consolidation in unsaturated soils［J］. Applied Mathematics and Mechanics, 2010, 31(2): 199-209.(in Chinese)
［12］ NAGEL F, MESCHKE G. An elastic-plastic three phase model for partially saturated soil for the finite element simulation of compressed air support in tunneling［J］. International Journal Numbering Analysis Methods Geomechanics, 2010, 34: 605-625.
［13］ 欧阳斌强, 唐朝生, 王德银, 等. 土体水分蒸发研究进展［J］. 岩土力学, 2016, 37(3): 625-636.
OUYANG Binqiang, TANG Chaosheng, WANG Deyin, et al. Advances on soil moisture evaporation［J］. Rock and Soil Mechanics, 2016, 37(3): 625-636.(in Chinese)
［14］ EMIR J M, LAUREANO R H, PEDRO A. Constitutive modeling of unsaturated soil behavior under axisymmetric stress states using a stress/suction-controlled cubical test cell［J］. International Journal of Plasticity, 2003, 19: 1481-1515.
［15］ 陈正汉, 孙树国, 方祥位, 等. 非饱和土与特殊土测试技术新进展［J］. 岩土工程学报, 2006, 28(2): 147-169.
CHEN Zhenghan, SUN Shuguo, FANG Xiangwei, et al. Recent advances of the measuring technology for unsaturated soils and special soils［J］. Chinese Journal of Geotechnical Engineering, 2006, 28(2): 147-169.(in Chinese)
［16］ 高游, 孙德安. 制样方法对非饱和土力学特性的影响［J］. 岩土工程学报, 2016, 38(8): 1529-1534.
GAO You, SUN De’an. Effect of specimen preparation on mechanical behavior of unsaturated soils［J］. Chinese Journal of Geotechnical Engineering, 2017, 36(3): 736-744.(in Chinese)
［17］ 高登辉, 陈正汉, 郭楠, 等. 干密度和基质吸力对重塑非饱和黄土变形与强度特性的影响［J］. 岩石力学与工程学报, 2017, 36(3): 736-744.
GAO Denghui, CHEN Zhenghan, GUO Nan, et al. The influence of dry density and matric suction on the deformation and the strength characteristics of the remolded unsaturated loess soils［J］. Chinese Journal of Rock Mechanics and Engineering, 2017, 36(3): 736-744.(in Chinese)
［18］ 陶高梁, 孔令伟. 基于微观孔隙通道的饱和/非饱和土渗透系数模型及其应用［J］. 水利学报, 2017, 48(6): 702-709.
TAO Gaoliang, KONG Lingwei. A model for determining the permeability coefficient of saturated and unsaturated soils based on micro pore channel and its application［J］. Shuili Xuebao, 2017, 48(6): 702-709.(in Chinese)
［19］ 蒋明镜, 胡海军. 密实和松散颗粒材料等吸力三轴剪切试验离散元数值模拟［J］. 中南大学学报自然科学版, 2010, 41(6): 2350-2359.
JIANG Mingjing, HU Haijun. Numerical simulation of triaxial shear test of dense and loose granulates under constant suction by discrete element method［J］. Journal of Central South University Science and Technology, 2010, 41(6): 2350-2359.(in Chinese)

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备注/Memo

备注/Memo:
Received：2017-08-25；Accepted：2017-11-28
Foundation：National Natural Science Foundation of China (41472253)
Corresponding author：Professor LI Shunqun． E-mail: lishunqun@sina.com
Citation：LI Shunqun，GUI Chao，XIA Jinhong．Transient flow in unsaturated soil under the constant air pressure［J］. Journal of Shenzhen University Science and Engineering, 2018, 35(1): 70-77.（in Chinese）
基金项目：国家自然科学基金资助项目(41472253)
作者简介：李顺群（1971—），男，新乡学院客座教授. 研究方向：土力学和基础工程. E-mail: lishunqun@sina.com
引文：李顺群, 桂超, 夏锦红. 常气压下非饱和土的一维瞬态渗流［J］. 深圳大学学报理工版，2018，35(1)：70-77.
更新日期/Last Update: 2017-12-22