Please wait a minute...
浙江大学学报(工学版)
J4  2014, Vol. 48 Issue (2): 236-241    DOI: 10.3785/j.issn.1008-973X.2014.02.008
    
Experimental investigation of seepage barrier effect by air-inflation in soil
LIU Chang-dian1, SUN Hong-yue1, KANG Jian-wei1, Du Li-li2
1. Ocean College, Zhejiang University, Hangzhou 310058,China; 2. Department of Civil Engineering,
Zhejiang University,Hangzhou 310058, China
Download:   PDF(903KB) HTML
Export: BibTeX | EndNote (RIS)      

Abstract  

This paper presents a method to cutoff or drain underground water by inflating air into slope according to the landslide induction principle by rainfall. The natural infiltration and air-inflation infiltration were simulated by a laboratorial ponding infiltration test considering the influence of air pressure. The development of wet front was observed and the volumetric moisture content of different depths was investigated in the test. Subsequently, a method for the evaluation of seepage barrier effect by air-inflation was developed considering the air pressure effects on the wet front and volumetric moisture content. The results indicate that the air-inflation in soil significantly decreases the rate of wet front development. The air pressure can keep the volumetric moisture content gradient in the soil in the case of air-inflation. In the present study, the air-inflation infiltration rate is around 1/2 of the natural inflation infiltration rate after 20 minutes infiltration under the air pressure of 10 kPa.

Published: 01 February 2014
CLC:  TU 411  
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
Cite this article:

LIU Chang-dian, SUN Hong-yue, KANG Jian-wei, Du Li-li. Experimental investigation of seepage barrier effect by air-inflation in soil. J4, 2014, 48(2): 236-241.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2014.02.008     OR     http://www.zjujournals.com/eng/Y2014/V48/I2/236


土体的充气阻渗试验

针对降雨诱发滑坡的作用机理,提出一种边坡充气截排水方法.考虑气压作用,进行一维土柱积水入渗试验,分别开展自然入渗和充气入渗2个过程的模拟,观测湿润锋面的推进过程,进行土柱不同深度容积含水量的实时监测.在考虑气压对容积含水量和湿润锋推进影响的基础上,建立充气阻渗效果的评价方法.试验结果表明：向土体中充气能够显著减缓湿润锋面的推进速度；在充气条件下,气压可以使土体维持一定的容积含水量梯度；对于试验模型,充气气压为10 kPa条件下,入渗20 min时,土壤入渗率约为自然入渗的1/2.

 

［1］ 魏丽敏,何群,林镇洪.考虑地下水影响的滑坡稳定性分析［J］.岩土力学,2004,25（3）: 422-426.
WEI Li-min,HE Qun,LIN Zhen-hong.Stability analysis of landslide under influence of groundwater ［J］. Rock and Soil Mechanics,2004,25(3): 422-426.
［2］ 殷坤龙,汪洋,唐仲华.降雨对滑坡的作用机理及动态模拟研究［J］.地质科技情报,2002,21（1）: 75-78.
YIN Kun-long,WANG Yang,TANG Zhong-hua.Mechanism and dynamic simulation of landslide by precipitation ［J］.Geological Science and Technology Information,2002,21(1): 75-78.
［3］ 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,2009,42（9）: 777-778.
SUN Dong-mei,FENG Ping,ZHANG Ming-jin.Refined analysis of stability of unsaturated soil slope due to rainfall infiltration considering the effect of gas phase ［J］.Journal of Tianjin University,2009,42(9): 777-778.
［4］ 刘才华,陈从新,冯夏庭,等.地下水对库岸边坡稳定性的影响［J］.岩土力学,2005,26（3）: 419-422.
LIU Cai-hua, CHEN Cong-xin, FENG Xia-ting, et al. Effect of groundwater on stability of slopes at reservoir bank ［J］. Rock and Soil Mechanics,2005,26(3): 419422.
［5］ 唐海行,苏逸深,刘炳敖.土壤包气带中气体对入渗水流运动影响的实验研究［J］.水科学进展,1995,6（4）: 263-268.
TANG Yi-xing, SU Yi-shen, LIU Bing-ao. Laboratory study for influence of air on the infiltration ［J］.Advances in Water Science,1995,6(4): 263268.
［6］ 沈铁元,彭涛,殷志远,等.包气带气压计算及其影响入渗的模拟［J］.沙漠与绿洲气象,2012,6（2）： 8-18.
SHEN Tie-yuan, PENG Tao, YIN Zhi-yuan， et al. Air pressure in the Vadose-Zone calculation and its impact on infiltration simulation ［J］.Desert and Oasis Meteorology,2012,6(2): 8-12.
［7］ 李援农,林性粹.均质土壤积水入渗的气阻变化规律及其影响［J］土壤侵蚀与水土保持学报,1997,3（3）: 88-93.
LI Yuan-nong, LIN Xing-cui.Regularlty of the soil air-resistance change and its influences under water-accumulated infiltration in the homogenou soil ［J］.Journal of Soil Erosion and Water Conserwation, 1997,3(3): 88-93.
［8］ 李援农.土壤入渗中气相对水流运动影响的研究［J］.干旱地区农业研究.2002,20,(1): 81-82.
LI Yuan-nong.Effects of air-phase on waterflow in infiltration ［J］.Agricultural Research in the Arid Areas,2002,20(1): 81-82.
［9］ 李援农,刘书榜.土壤入渗气液两相流的变化过程［J］.西北农林科技大学学报,2002,30（6）: 177-180.
LI Yuan-nong,LIU Shu-bang.Changes of two soil phases in the process of infiltration ［J］Jour.of Northwest Sci-Tech Univ.of Agri.and For.(Nat.Sci.Ed),2002,30(6): 177-180.
［10］ 王建新,王恩志,王思敬.降雨自由入渗阶段试验研究及其过程的水势描述［J］.清华大学学报：自然科学版，2010,50（12）: 1920-1924.
WANG Jian-xin,WANG En-zhi,WANG Si-jing.Potential description of rainfall free infiltration phase ［J］. Journal of Tsinghua University: Science and Technology, 2010,50(12): 1920-1924.
［11］ 梁爱民,邵龙潭.土壤中空气对土结构和入渗过程的影响［J］.水科学进展,2009,20（4）: 503-505.
LIANG Ai-min,SHAO Long-tan.Experimetal study of the air entrapment effects on soil structure andinfiltration ［J］. Advances in Water Science,2009,20(4): 503-505.
［12］ 张华,吴争光. 封闭气泡对一维积水入渗影响的试验研究［J］. 岩土力学,2009,30(增2)： 132-137.
ZHANG Hua,WU Zheng-guang. Experimental study on the effect of entrapped air on one-dimensional ponded water infiltration ［J］.Rock and Soil Mechanics, 2009, 30(S0): 132-137.
［13］ GREEN W H, AMPT G A.Studies on soil physics Part I: The flow of air and water though soil ［J］.Journal of Agricultural Sciences,1911,4(1): 124.
［14］ GRISMER M E,MN ORANG,V CLAUSNITZER, et al、Effects of air compression and counterflow on infiltration into soils ［J］. Journal of Irrigation and Drainage Engineering,1994,120: 775-795.
［15］ MOREL-SEYTOUX H J,KHANJI J.Derivation of equation of infiltration［J］. Water Resources Research,1974,10: 795-800
[1] KE Han,WANG Wen-fang, WEI Chang-chun, CHEN Yun-min, ZHAN Liang-tong. Experimental study on saturated hydraulic conductivity of MSW under different conditions[J]. J4, 2013, 47(7): 1164-1170.
[2] WANG Lin-tao, GONG Guo-fang, SHI Hu, LIU Huai-yin. Ground surface deformation control based on chamber
pressure direct feedback[J]. J4, 2012, 46(7): 1182-1188.
[3] LIU Yong-li, SUN Hong-yue, YU Yang, ZHAN Wei,SHANG Yue-quan. Determining landslide thrust on anti-sliding pile by
BOTDR monitoring technology[J]. J4, 2012, 46(5): 798-803.
[4] LIU Yong-li, SUN Hong-yue, YU Yang, ZHAN Wei, SHANG Yue-quan. BOTDR monitoring analysis of anti-sliding pile internal force[J]. J4, 2012, 46(2): 243-249.
[5] XU Ri-qing, ZHANG Jun, ZHU Jian-feng, WANG Xing-chen. Modified Duncan-Chang model considering disturbance[J]. J4, 2012, 46(1): 1-7.
[6] ZHOU Jian, ZHENG Hong-bin, WEN Xiao-gui, GUAN Lin-bo, DENG Yi-liang. Deformation of intact soft clay under principal stress rotation
with effect of intermediate principal stress[J]. J4, 2011, 45(12): 2134-2141.
[7] CHEN Guo-hong, XIE Kang-he, CHENG Yong-feng, XU Yan. Analytical solution for consolidation of sand-drained ground considering
variation of permeability coefficient in smeared zone[J]. J4, 2011, 45(4): 665-670.
[8] SHI Hu, GONG Guo-fang, YANG Hua-yong, WANG Hui. Determination of thrust force for shield tunneling machine[J]. J4, 2011, 45(1): 126-131.