马兰黄土渗气率与饱和渗透系数的关系研究

刘锦阳; 李喜安; 简涛; 郭泽泽

马兰黄土渗气率与饱和渗透系数的关系研究

基金项目:

国家自然科学基金资助项目(41572264，41172255，41440044)

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出版历程
- 收稿日期: 2016-11-29
- 修回日期: 2016-11-29

A study of the relationship between gas permeability and saturated coefficient of permeability of the Malan loess

LIUJinyang,

摘要

摘要: 利用改进的ZC-2015型渗气仪和TST-55型渗透仪进行马兰黄土渗气和饱和渗透试验，确定稳定渗气率对应的稳定渗径，进而探讨渗气率ka和饱和渗透系数Kw的关系。研究结果表明： ka不仅能描述非饱和土孔隙和结构特征，也能用于预测Kw。气体渗气率随着渗径的增大而减小，最终趋于稳定，原状和重塑黄土的稳定渗径均约8 cm。ka和Kw间呈明显的双对数线性关系，不同深度的原状风干黄土和不同粒组的重塑土的lgka和lgKw间的相关性都比较明显，但原状风干黄土和重塑土之间的拟合公式有很大差异。另外，黏粒含量较高时，重塑土拟合直线的斜率β和截距α明显增大。不同含水率下，重塑土拟合公式有很大的差异，当含水率较大时，随着干密度的增大，ka的变化程度比Kw大，拟合直线的斜率β和截距α都有明显的减小。
- 渗气率 /
- 稳定渗径 /
- 饱和渗透系数 /
- 双对数线性关系 /
- 马兰黄土 /
- 黏粒含量
Abstract: A series of gas and saturated penetration tests for the Malan loess are conducted by using the improved ZC-2015 air permeameter and TST-55 permeameter. We firstly determine the stable permeability diameter of the corresponding ka, and then explore the relationship between air permeability ka and saturation coefficient of permeability Kw. The research results show that ka not only describes the pore and structural characteristics of unsaturated soils, but also can be used to predict Kw. ka decreases with the increasing permeability diameter, and ultimately this trend becomes stabilized. The stable permeability of the undisturbed and remolded loess is 8 cm. There is a significant double-logarithmic linear relationship between ka and Kw, The correlation between lgka and lgKw of the remolded loess with different grain compositions and undisturbed loess in different depths are obvious, but the fitting formula between the undisturbed soil and the remolded soil is very different. In addition, when the content of clay particles is high, the slope β and intercept α of the remolded sample obviously increase. Under the different water content, the formula of the remolded soil is very different. when the water content, the change in ka is more than Kw with the increase of the dry density, and the slope β and the intercept α of fitting line are obviously reduce.
- gas permeability /
- stable permeability diameter /
- saturated permeability coefficient /
- double-logarithmic linear relationship /
- Malan loess /
- content of day particles

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参考文献(21)

[1]	［1］孙建中. 黄土名词问题［J］. 地球科学与环境学报，1985（2）：42-46. ［SUN J Z. Noun problem of loess［J］. Journal of Earth Science and the Environment，1985（2）：42-46 (in Chinese)］
[2]	［2］苗强强，陈正汉，张磊，等. 非饱和黏土质砂的渗气规律试验研究［J］. 岩土力学，2010，31(12)：3746-3750. ［MIAO Q Q，CHEN Z H，ZHANG L，et al. Experimental study of gas permeability of unsaturated clayey sand［J］. Rock and Soil Mechanics，2010，31(12)：3746-3757 (in Chinese)］
[3]	［3］姚志华，陈正汉，黄雪峰，等. 非饱和Q3黄土渗气特性试验研［J］.岩石力学与工程学报，2012,31（6）：1264-1273. ［YAO Z H，CHEN Z H，HUANG X F，et al. Experimental research on gas permeability of unsaturated Q3 loess［J］. Chinese Journal of Rock Mechanics and Engineering，2012，31(6)：1264-1273 (in Chinese)］
[4]	［4］汪龙，方祥位，申春妮，等. 膨润土-砂混合型缓冲/回填材料渗气规律试验研究［J］. 岩石力学与工程学报，2015，34（增刊1）：3381-3388. ［WANG L，FANG X W，SHEN C N，et al. Experimental study of gas permeability of bentonite-sand mixtures as buffer/back filling materials［J］. Chinese Journal of Rock Mechanics and Engineering，2015，34（Sup1）：3381-3388 (in Chinese)］
[5]	［5］陈存礼，张登飞，张洁，等. 等向应力条件下原状Q3黄土的渗气特性研究［J］. 岩土工程学报，2017，39(2)：287-294. ［CHEN C L，ZHANG D F，ZHANG J，et al. Gas permeability of intact Q3 loess under isotropic stress［J］. Chinese Journal of Geotechnical Engineering，2017，39(2)：287-294 (in Chinese)］
[6]	［6］刘奉银，张昭，周冬. 湿度和密度双变化条件下的非饱和黄土渗气渗水函数［J］. 岩石力学与工程学报，2010，29(9)：1907-1914. ［LIU FY，ZHANG Z，ZHOU D. Density-saturation-dependent air-water permeability function of unsaturated loess［J］. Chinese Journal of Rock Mechanics and Engineering，2010，29(9)：1907-1914 (in Chinese)］
[7]	［7］施建勇，赵义. 气体压力和孔隙对垃圾土体气体渗透系数影响的研究［J］. 岩土工程学报，2015，37(4)：586-593. ［SHI J Y，ZHAO Y. Influence of air pressure And void on permeability coefficient of air in municipal solid waste(MSW)［J］. Chinese Journal of Geotechnical Engineering，2015，37(4)：586-593 (in Chinese)］
[8]	［8］杨益彪，詹良通，王顺玉，等. 封顶覆盖黄土气体渗透特性测试及填埋气一维运移分析［J］. 岩土力学，2015，36(7)：1973-1980. ［YANGY B，ZHANG L T，WANG S Y，et al. Measurement of gas permeability of cover loess and one-dimensional analysis of land fill gas emission［J］.Rock and Soil Mechanics，2015，36(7)：1973-1980 (in Chinese)］
[9]	［9］彭尔兴，孙文博，章定文，等. 非饱和含砂细粒土的气体渗透特性研究［J］. 岩土力学，2016，37（5）：1301-1306. ［PENG E X，SUN W B，ZHANG D W，et al. Air permeability of unsaturated fine sandy soil［J］.Rock and Soil Mechanics，2016，37（5）：1301-1306 (in Chinese)］
[10]	［10］Iversen B V，Moldrup P，Schjnning P，et al. Air and water permeability in differently textured soils at two measurement scales［J］. Soil Science，2001，166：643-659.
[11]	［11］Chief K, Ferre T, Nijssen B. Correlation between air permeability and saturated hydraulic conductivity: Unburned and burned soils［J］. Soil Science Society of America Journal, 2008,72(6):1501-1509.
[12]	［12］Mohammad R N，Mehdi R，Seyed A R A，et al. Prediction of unsaturated soil hydraulic conductivity using air permeability: Regression approach［J］. Indian J Agric Rec，2015，49(6)：528-533.
[13]	［13］Huang M B，Rodger H，Barbour S L. An evaluation of air permeability measurements to characterize the saturated hydraulic conductivity of soil reclamation covers［J］. Can J Soil Sci，2015，95：15-26.
[14]	［14］HUANG M B，Zettl J D，Barbour S L，et al. Characterizing the spatial variability of the hydraulic conductivity of reclamation soils using air permeability［J］. Geoderma，2016，262：285-293.
[15]	［15］刘东生. 黄土的物质成分与结构［M］. 北京：科学出版社，1966. ［LIU D S. The material composition and structure of loess［M］.Beijing：Science Press，1966 (in Chinese)］
[16]	［16］丁朴荣. ZC-5型渗气仪的研制与渗气测试方法的研究［J］. 西安理工大学学报，1986（4）：37-52. ［DING P R. The research on ZC-5 air permeameter development and Air permeability test method［J］. Journal of Xi’an University of Technology，1986（4）：37-52 (in Chinese)］
[17]	［17］丁朴荣. 沥青混凝土斜墙渗气检验的理论与实践［J］. 水力发电学报，1989(4)：86-97. ［DING P R. The test of asphalt concrete inclined wall air permeability theory and practice［J］. Journal of hydroelectric power，1986(4)：86-97 (in Chinese)］
[18]	［18］Marc J，Jacob H D. A handheld device for instrusive and nonintrusive field measurements of air permeability［J］.Vadose Zone Journal，2003(2)：611-617.
[19]	［19］Klinkenberg L J. The permeability of porous media to liquids and gases［C］//Drilling and Production Practice. Washington D C：［s.n.］, 1941：200-213.
[20]	［20］Blackwell P S，Ringrose A J，Jayawardan N S，et al. The use of air-filled porosity and intrinsic permeability to air to characterize structure of macro pore space and saturated hydraulic conductivity of clay soils［J］. Soil Science，1990,41：215-228.
[21]	［21］Loll P，Moldrup P，Schjnning P，et al. Predicting saturated hydraulic conductivity from air permeability：applcation in stochastic water infiltration modeling［J］. Water Resour Res，1999，35：2387-2400.

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