Hydraulic Properties Analysis of the Unsaturated Cracked  Soil

doi:10.1007/s12204-017-1796-6

Abstract

Abstract: Morphological parameters of cracks significantly affect the hydraulic conductivity of cracked soil. A laboratory test was conducted to study the hydraulic properties of cracks. The dynamic development of cracks in soil during drying and wetting was measured in the test. Based on the test results, the relationships between the morphological parameters and the soil water content were quantified. According to the fractal model, the soil-water characteristic curve (SWCC) and permeability functions for the cracked soil were predicted based on the dynamical development process of the cracks. A crack-pore dual media model was established to simulate the ponding infiltration in the unsaturated cracked soil. The variations of the pore water pressure in different part of the fractal model are quite different due to the impact of the cracks. This result illustrates that the prediction of the hydraulic properties for the cracked soil is reasonable.

Key words: expansive soil| seepage| fractal model| soil-water characteristic curve (SWCC)| crack-pore media

摘要： Morphological parameters of cracks significantly affect the hydraulic conductivity of cracked soil. A laboratory test was conducted to study the hydraulic properties of cracks. The dynamic development of cracks in soil during drying and wetting was measured in the test. Based on the test results, the relationships between the morphological parameters and the soil water content were quantified. According to the fractal model, the soil-water characteristic curve (SWCC) and permeability functions for the cracked soil were predicted based on the dynamical development process of the cracks. A crack-pore dual media model was established to simulate the ponding infiltration in the unsaturated cracked soil. The variations of the pore water pressure in different part of the fractal model are quite different due to the impact of the cracks. This result illustrates that the prediction of the hydraulic properties for the cracked soil is reasonable.

关键词: expansive soil| seepage| fractal model| soil-water characteristic curve (SWCC)| crack-pore media

CLC Number:

TU 443

CAO Ling1,2* (曹玲), ZHANG Hua1 (张华), CHEN Yong1 (陈勇). Hydraulic Properties Analysis of the Unsaturated Cracked Soil[J]. Journal of shanghai Jiaotong University (Science), 2017, 22(1): 35-044.

References 21

[1]	XU Y, ZHANG L M. Breaching parameters of earthand rockfill dams [J]. Journal of Geotechnical andGeoenvironmental Engineering, 2009, 135(12): 1957-1970.
[2]	TALBOT J R, DEAL C E. Rehabilitation of crackedembankment dams [C]//Proceedings of GeotechnicalPractice in Dam Rehabilitation. North Carolina, USA:ASCE, 1993: 267-283.
[3]	YAO H L, ZHENG S H, CHEN S Y. Analysis of theslope stability of expansive soils considering cracksand infiltration of rainwater [J]. Chinese Journal ofGeotechnical Engineering, 2001, 23(5): 606-609 (inChinese).
[4]	LI J H. Field experimental study and numerical simulationof seepage in saturated/unsaturated cracked soil[D]. Hong Kong, China: Department of Civil and EnvironmentalEngineering, The Hong Kong Universityof Science and Technology, 2009.
[5]	ZHANG L M, FREDLUND D G. Characteristics ofwater retention curves for unsaturated fractured rocks[C]//Proceedings of the Second Asian Conference onUnsaturated Soils. Osaka, Japan: ASIA, 2003: 425-428.
[6]	BURGER C A, SHACKELFORD C D. Soil-watercharacteristic curves and dual porosity of sanddiatomaceousearth mixtures [J]. Journal of Geotechnicaland Geoenvironmental Engineering, 2001, 127(9):790-800.
[7]	MILLER C J, MI H, YESILLER N. Experimentalanalysis of desiccation crack propagation in clay liners[J]. Journal of the American Water Resources Association,1998, 34(3): 677-686.
[8]	VOGEL H J, HOFMANN H, ROTH K. Studies ofcrack dynamics in clay soil: Experimental methods, results,and morphological quantification [J]. Geoderma,2005, 125: 203-211.
[9]	TANG C S, SHI B, LIU C, et al. Influencing factorsof geometrical structure of surface shrinkage cracks inclayey soils [J]. Engineering Geology, 2008, 101(3/4):204-217.
[10]	PETERS R R, KLAVETTER E A. A continuummodel for water movement in an unsaturated fracturedrock mass [J]. Water Resources Research, 1988, 24(3):416-430.
[11]	XU Y F, DONG P. Fractal approach to hydraulic propertiesin porous media [J]. Chaos, Solitons and Fractals,2004, 19(2): 327-337.
[12]	RIEU M, SPOSITO G. Fractal fragmentation, soilporosity, and soil water properties: Theory [J]. SoilScience Society of America Journal, 1991, 55 (5):1231-1238.
[13]	GUARRACINO L. A fractal constitutive model forunsaturated flow in fractured hard rock [J]. Journalof Hydrology, 2006, 324(1/2/3/4): 154-162.
[14]	LE′ ON C A L Y. New perspectives in mercuryporosimetry[J]. Advances in Colloid and IntefaceScience, 1998, 76: 341-372.
[15]	SHENG Y G, XU Y, LI Z H, et al. Determination offractal dimensions of silicon dioxide xerogel by meansof gas-adsorption [J]. Acta Physica Sinica, 2005, 54(1):221-227 (in Chinese).
[16]	PHAM H Q, FREDLUND D G, BARBOUR S L. Astudy of hysteresis models for soil-water characteristiccurves [J]. Canadian Geotechnical Journal, 2005,42(6): 1548-1568.
[17]	REITAM S, KUPER B H. Laboratory measurementof capillary pressure-saturation relationships in a rockfracture [J]. Water Resources Research, 1994, 30(4):865-878.
[18]	REN Q, XU W Y. Fractal model for unsaturated seepageflow in fractured rock masses [J]. Rock and SoilMechanics, 2008, 29(10): 2735-2740 (in Chinese).
[19]	National Research Council. Conceptual model of flowand transport in the fractured vadose zone [M]. Washington:National Academy Press, 2001.
[20]	ZHANG Y T. Rock hydraulics and engineering [M].Beijing: China Water Power Press, 2005: 243-244 (inChinese).
[21]	CURRIE I G. Fundamental mechanics of fluids [M].New York: McGraw-Hill, 1993.

Hydraulic Properties Analysis of the Unsaturated Cracked Soil

Hydraulic Properties Analysis of the Unsaturated Cracked Soil

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References 21

Related Articles 12

Recommended Articles

Metrics

Comments

[1]	LU Linhai, WU Chaojun, SUN Jiecheng, CAI Hao, YE Guanlin. Micropore Characteristics and CT Seepage Test of Jinan Red Clay with a Strong Vertical Permeability [J]. Journal of Shanghai Jiao Tong University, 2022, 56(9): 1218-1226.
[2]	YAO Maohong, CHEN Tielin, FAN Rong, YANG Zili, SHI Ye. Slope Stability Considering the Effects of Air Pressure and Seepage Under Heavy Rainfall Conditions [J]. Journal of Shanghai Jiao Tong University, 2022, 56(6): 739-745.
[3]	CHEN Yu，TENG Kenan,TANG Jinguo，WANG Liying. Optimal Estimation of Fractal Dimension for Two-Dimension Sea Surface Infrared Image [J]. Journal of Shanghai Jiaotong University, 2018, 52(8): 1003-.
[4]	XU Changjie,LIANG Luju,DING Wenxiang. Analytical Solutions on Steady Seepage Field of Deep Buried Circular Tunnel After Considering Anisotropic Flow [J]. Journal of Shanghai Jiaotong University, 2018, 52(12): 1565-1570.
[5]	HUANG Ming, LU Yingshou, LAN Zhuguang, LIU Jun. Back Analysis of Permeability Parameters Under Unsteady Seepage of Seawall [J]. Journal of Shanghai Jiao Tong University, 2016, 50(03): 443-447.
[6]	HE Liange，ZUO Zhengxing，XIANG Jianhua. Normal Contact Stiffness Fractal Model Considering Asperity Elastic-Plastic Transitional Deformation Mechanism of Joints [J]. Journal of Shanghai Jiaotong University, 2015, 49(01): 116-121.
[7]	ZHANG Dong-dong (张冬冬), SONG Chun-yu* (宋春雨), CHEN Long-zhu (陈龙珠). Numerical Evaluation of Land Subsidence Induced by Dewatering in Deep Foundation Pit [J]. Journal of shanghai Jiaotong University (Science), 2013, 18(3): 278-283.
[8]	HUANG Ming1,LIU Jun2. Seepage Pressure Neural Network Monitoring Model for High Slope Considering the effect of Rainfall [J]. Journal of Shanghai Jiaotong University, 2013, 47(10): 1548-1551.
[9]	FAN Yongfeng. Experimental Study of Mechanical Properties of Lime Stabilized Expansive Soil under the Condition of Eluviations [J]. Journal of Shanghai Jiaotong University, 2013, 47(09): 1390-1394.
[10]	HUANG Ming-1, LIU Jun-2. Establishment of Sea Wall Seepage Pressure Multi-point RBF Monitoring Model [J]. Journal of Shanghai Jiaotong University, 2012, 46(10): 1675-1679.
[11]	Zhang J.-R.; Tao G.-L.. A new model for soil consolidation based on microstructure [J]. J Shanghai Jiaotong Univ Sci, 2011, 16(1): 78-82.
[12]	YOU Jin-Min, CHEN Tian-Ning. Estimation for Normal Parameters of Joint Surfaces Based on Fractal Theory [J]. Journal of Shanghai Jiaotong University, 2011, 45(09): 1275-1280.