›› 2010, Vol. 31 ›› Issue (6): 1809-1812.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental study of unsaturated permeability coefficient of compacted loess

ZHAO Yan-xu1, 2,ZHANG Hu-yuan1,LÜ Qing-feng1,LIANG Xiao-bo1   

  1. 1. Key Laboratory of Mechanics on Disaster and Environment in Western China, Lanzhou University, Lanzhou 730000, China; 2. China Railway 21st Bureau Group Co., Lanzhou 730000, China
  • Received:2009-10-20 Online:2010-06-10 Published:2010-06-25

Abstract:

Unsaturated permeability coefficient of compacted loess is studied by the test system of hydraulic conductivity under different dry densities. The relationship between matric suction and permeability coefficient shows that the permeability coefficient decreases with suction increase nonlinearly, and increases with dry density decrease. It is found that dry density has more effect on the permeability coefficient in the low matrix suction than in the high matrix suction.It is indicated that from test results,the relation between permeability coefficient and matrix suction can be fitted with power function model under certain conditions. The relationship between dry densities and parameters is explored for estimating the coefficient of permeability of unsaturated compacted loess.

Key words: unsaturated permeability coefficient, matric suction, compacted loess, dry density, the Ku-pF apparatus

CLC Number: 

  • TU 411
[1] LI Xiao-xuan, LI Tao, PENG Li-yun, . Elastoplastic two-surface model for unsaturated cohesive soils under cyclic loading with controlled matric suction [J]. Rock and Soil Mechanics, 2020, 41(2): 552-560.
[2] WU Er-lu, ZHU Jun-gao, GUO Wan-li, LU Yang-yang, . Experimental study of compaction characteristics of coarse-grained soil based on gradation equation [J]. Rock and Soil Mechanics, 2020, 41(1): 214-220.
[3] WANG Huan, CHEN Qun, WANG Hong-xin, ZHANG Wen-ju, . Triaxial tests on fly ash with different compaction and matric suction [J]. Rock and Soil Mechanics, 2019, 40(S1): 224-230.
[4] LIU Li, WU Yang, CHEN Li-hong, LIU Jian-kun, . Accuracy analysis of wetting front advancing method based on numerical simulation [J]. Rock and Soil Mechanics, 2019, 40(S1): 341-349.
[5] WANG Juan-juan, HAO Yan-zhou, WANG Tie-hang. Experimental study of structural characteristics of unsaturated compacted loess [J]. Rock and Soil Mechanics, 2019, 40(4): 1351-1357.
[6] BAO Xiao-hua, LIAO Zhi-guang, XU Chang-jie, PANG Xiao-chao, XIE Xiong-yao, CUI Hong-zhi, . Model test study of the failure of silty sand slope under different seepage boundary conditions [J]. Rock and Soil Mechanics, 2019, 40(10): 3789-3796.
[7] GAO Yuan, YU Yong-tang, ZHENG Jian-guo, LIANG Yi, . Strength characteristics of compacted loess during leaching [J]. Rock and Soil Mechanics, 2019, 40(10): 3833-3843.
[8] YI Jin-xiang, LI Lei, WANG Pei, YANG Guang,. Compaction characteristics of sewage sludge-municipal solid waste mixed landfill [J]. , 2018, 39(S1): 453-460.
[9] TAO Gao-liang, BAI Liang, YUAN Bo, GAN Shi-chao. Study of relationship between soil-water characteristic curve and NMR curve [J]. , 2018, 39(3): 943-948.
[10] JIANG Jing-shan, CHENG Zhan-lin, ZUO Yong-zhen, DING Hong-shun,. Effect of dry density on mechanical properties of rockfill materials [J]. , 2018, 39(2): 507-514.
[11] QIAN Jin-song, LI Jia-yang, ZHOU Ding, LING Jian-ming. Prediction model of resilient modulus for unsaturated clay soils considering the effect of matric suction [J]. , 2018, 39(1): 123-128.
[12] FANG Jin-jin, SHAO Sheng-jun, FENG Yi-xin,. Suction changes of intact Q3 loess based on true triaxial tests [J]. , 2017, 38(4): 934-942.
[13] YE Wan-jun, DONG Xi-hao, YANG Geng-she, CHEN Qiang, PENG rui-qi, LIU Kuan. Effect of moisture content and dry density on thermal parameters of loess [J]. , 2017, 38(3): 656-662.
[14] WU Jun-hua, YANG Song,. Experimental study of matric suction measurement and its impact on shear strength under drying-wetting cycles for expansive soils [J]. , 2017, 38(3): 678-684.
[15] WANG Xin-zhi, WANG Xing, HU Ming-jian, ZHU Chang-qi, MENG Qing-shan, WANG Ren,. Study of permeability of calcareous silty layer of foundation at an artificial reclamation island [J]. , 2017, 38(11): 3127-3135.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] XIANG Tian-bing, FENG Xia-ting, CHEN Bing-rui, JIANG Quan, ZHANG Chuan-qing. Rock failure mechanism and true triaxial experimental study of specimens with single structural plane under three-dimensional stress[J]. , 2009, 30(10): 2908 -2916 .
[2] WEN Shi-qiang, CHEN Yu-min, DING Xuan-ming, ZUO Wei-long. Application of grouted gravel pile in soft subgrade improvement of expressway[J]. , 2010, 31(5): 1559 -1563 .
[3] ZHANG Chang-guang,ZHANG Qing-he,ZHAO Jun-hai. Unified solutions of shear strength and earth pressure for unsaturated soils[J]. , 2010, 31(6): 1871 -1876 .
[4] YANG Tian-hong, CHEN Shi-kuo, ZHU Wan-cheng, LIU Hong-lei. Coupled model of gas-solid in coal seams based on dynamic process of pressure relief and gas drainage[J]. , 2010, 31(7): 2247 -2252 .
[5] HU Xiu-hong,WU Fa-quan. Research on two-parameter negative exponential distribution of discontinuity spacings in rock mass[J]. , 2009, 30(8): 2353 -2358 .
[6] LI Wei-chao, XIONG Ju-hua, YANG Min. Improved method for calculating anti-overturning safety factor of cement-soil retaining wall in layered soil[J]. , 2011, 32(8): 2435 -2440 .
[7] ZHANG Gui-min , LI Yin-ping , SHI Xi-lin , YANG Chun-he , WANG Li-juan. Research on a model material preparation method for alternate layered rock mass and preliminary experiment[J]. , 2011, 32(S2): 284 -289 .
[8] WANG Wei LI Xiao-chun LI Qiang SHI Lu WANG Ying BAI Bing. Small size in-situ transient pulse permeability measurement system and its experimental research[J]. , 2011, 32(10): 3185 -3189 .
[9] LI Shu-cai , ZHAO Yan , XU Bang-shu , LI Li-ping , LIU Qin , WANG Yu-kui . Study of determining permeability coefficient in water inrush numerical calculation of subsea tunnel[J]. , 2012, 33(5): 1497 -1504 .
[10] WANG Hong-xin , SUN Yu-yong . Test study and bar system FEM for foundation pits considering excavation width[J]. , 2012, 33(9): 2781 -2787 .