稻秸秆泥皮护坡材料对路基水分迁移影响的初步研究

doi:10.16843/j.sswc.2017.02.019

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Abstract [Background] In the southern China moist region, rainwater infiltration of slope surface and water migration in subgrade are the main factors for its bearing capacity degradation. Lacking protection will lead to cracking or excessive erosion on slope surface. In order to reduce water content changing in subgrade in sunny or rainy weather, a new material consisting of clay and rice straw is developed, and its application for slope protection is probed in this paper. [Methods] Firstly, the mud with rice straw was prepared by mixing the shredded clay with water and rice straw in 5-10 cm. And then the permeability coefficient and anti-penetrability performance of compacted clay, pure mud, mud with rice straw and vegetation was determined by variable head permeability test and impermeability test. Afterwards, an indoor-test simulating embankment slope in continuous natural radiation and continuous slope scouring was executed to probe soil moisture inside subgrade in condition 1: bare slope, condition 2: slope under the protection of pure mud, condition 3: slope under the protection of mud with rice straw, condition 4: condition 2 + grass seeds, and condition 5: condition 3 + grass seeds. Through the sampling test of the water content distribution in subgrade center of 60 cm horizontal depth under above conditions, the water migration characteristics of the subgrade under extreme weather conditions were studied. [Result] The permeability coefficient of the material of mud with rice straw was 0.81×10^-5 cm/s. The permeation time of mud with rice straw and vegetation samples was 21 h in the 4th and 5th dry-wet cycle penetration tests. In the dry weather condition, the moisture content of the mud decreased to 13.6% after 50 days in condition 3, and the moisture content was 17.2%-21.4% after 50 days in condition 5 in which the water content of the soil was stable. In the heavy rainfall scouring test, the water content of the condition 3 and condition 4 was only slightly increased at the 6th hour, while the water content of the soil in the horizontal depth of 20 cm was slightly increased in condition 5. [Conclusions] Mud with rice straw presents small permeability coefficient and optimal permeability. The mud cracks was reduced in dry weather and soil moisture was effectively maintained, what was beneficial to the plant growth. The mud with rice straw can improve the moisture migration performance in slope surface under heavy rainfall erosion, and keep the stability of the internal moisture content in subgrade. After the vegetation root growth and development, it can form a green ecological environmental protection system, thus, it has a great significance to highway ecological construction.

Key words： highway subgrade mud with rice straw material for slope protection permeability water migration

Received: 26 July 2016

PACS:	TU411
	P642.1

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	Articles by authors
	ZHANG Hongri
	WANG Guiyao
	LAN Sulian
	XIA Yiqi
	SHA Linchuan

Cite this article:

ZHANG Hongri,WANG Guiyao,LAN Sulian, et al. Effects of mud with rice straw as slope protection material on the water migrationin highway subgrade[J]. SSWC, 2017, 15(2): 146-152.

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http://journal12.magtechjournal.com/Jweb_stbc/EN/10.16843/j.sswc.2017.02.019 OR http://journal12.magtechjournal.com/Jweb_stbc/EN/Y2017/V15/I2/146

[1]	王桂尧,李斌,付宏渊. 非饱和路基土水分运移的室内试验研究[J]. 岩土力学,2010,31(1):61. WANG Guiyao, LI Bing, FU Hongyuan. Experimental study of moisture migration of unsaturated soil in embankment[J]. Rock and Soil Mechanics, 2010,31(1):61.
[2]	付强. 红粘土路基水汽运移特性及防排水优化设计研究[D]. 长沙:长沙理工大学, 2010: 48. FU Qiang. Research on vapor transportation characteristics and optimal design of drainage in red clay subgrade[D]. Changsha:Changsha University of Science and Technology,2010:48.
[3]	黄弈茗. 非饱和路基土的水分扩散与冷凝迁移试验研究[D]. 长沙:长沙理工大学, 2013: 43. HUANG Yiming. The research on moisture migration of unsaturated subgrade soil[D]. Changsha:Changsha University of Science and Technology,2013: 43.
[4]	赵明华,刘小平,陈安. 非饱和土路基毛细作用分析[J]. 公路交通科技,2008,25(8):26. ZHAO Minghua, LIU Xiaoping, CHEN An. Analysis of capillary effect in unsaturated roadbed[J]. Journal of Highway and Transportation Research and Development, 2008,25(8):26.
[5]	王协群,邹维列,骆以道,等. 压实度与级配对路基重塑黏土土-水特征曲线的影响[J]. 岩土力学,2011,32(增刊1):181. WANG Xiequn, ZOU Weilie, LUO Yidao, et al.Influence of compaction degree and gradation on SWCC of compacted clay soil[J]. Rock and Soil Mechanics, 2011,32(S1):181.
[6]	傅智,李红. 完善我国公路防排水技术[J]. 公路,2009(4):56. FU Zhi, LI Hong. Perfect the highway water proof and drainage technology in China [J]. Highway, 2009(4): 56.
[7]	中华人民共和国交通部. 公路路基施工技术规范:JTG F10—2006[S].北京:人民交通出版社,2006: 60. Ministry of Communications of the People's Republic of China. Technical specification for construction of highway subgrades:JTG F10-2006[S]. Beijing:China Communications Press, 2006: 60.
[8]	中华人民共和国交通运输部. 公路路基设计规范:JTG D30—2015[S].北京:人民交通出版社,2015: 34. Ministry of Transport of the People's Republic of China. Specifications for design of highway subgrades:JTG D30-2015[S]. Beijing:China Communications Press, 2015: 34.
[9]	牛皓,高建恩,杨世伟,等.地肤根系的力学性质及对道路侵蚀的影响[J].人民长江,2009,40(11):65. NIU Hao, GAO Jianen, YANG Shiwei, et al. The mechanical properties of broom cypress root and the effect on road erosion[J]. Yangtze River, 2009, 40(11): 65.
[10]	周自玮,孟广涛,毛熔,等. 三种多年生牧草保水能力及土壤改良作用的研究[J]. 中国草地学报,2008,30(1):66. ZHOU Ziwei,MENG Guangtao, MAO Rong, et al. Study on ability of water conservation and soil improvement of three perennial forage species[J]. Chinese Journal of Grassland, 2009, 30(1): 66.
[11]	王协康,方铎.植被措施控制水土流失机理及其效益研究[J].四川大学学报(工程科学版),2000,32(2):13. WANG Xiekang, FANG Duo. Study on the principles and pbenefits of plants to control water and soil losses[J]. Journal of Sichuan University (Engineering Science Edition), 2000,32(2):13.
[12]	戴全厚,喻理飞,薛萐,等. 植被控制水土流失机理及功能研究[J]. 水土保持研究,2008,15(2):32. DAI Quanhou, YU Lifei, XUE Sha, et al. Study on the Mechanism and Function of Soil and Water Loss Controlled by Vegetation[J]. Research ofSoil and Water Conservation,2008, 15(2):32.
[13]	蒙仲举,孙铁军,高永,等. 草地雀麦坡地水土保持作用的研究[J]. 水土保持通报,2008,28(4):86. MENG Zhongju, SUN Tiejun, GAO Yong, et al. Effects of soil and water conservation by meadow brome planted on a sloping land[J]. Bulletin of Soil and Water Conservation,2008, 28(4):86.
[14]	程龙飞,李林燕. 库区坡面植被水土保持生态建设模式[J]. 水土保持研究,2010,17(5):251. CHENG Longfei, LI Linyan. The ecosystem development mode of slope vegetation for water and soil conservancy in Three Gorges[J]. Research of Soil and Water Conservation, 2010,17(5):251.
[15]	习金根,吴浩,王一承,等. 花生秸秆覆盖栽培对菠萝生长的影响[J]. 安徽农业科学,2010,38(27):14915. XI Jingen, WU Hao, WANG Yicheng, et al. Effects of cover cultivation on plant and root growth of pineapple[J]. Journal of Anhui Agricultural Sciences, 2010,38(27):14915.
[16]	刘礼领,殷坤龙. 暴雨型滑坡降水入渗机理分析[J]. 岩土力学,2008,29(4):1061. LIU Liling, YIN Kunlong. Analysis of rainfall infiltration mechanism of rainstorm landslide[J]. Rock and Soil Mechanics, 2008,29(4):1061.
[17]	张昭,刘奉银,张国平. 土在全含水率范围内持水及非饱和渗透特性的模型描述[J]. 岩土工程学报,2014,(36)11:2069. ZHANG Zhao, LIU Fengyin, ZHANG Guoping. Models for water retention and unsaturated permeability in full range of water content[J]. Chinese Journal of Geotechnical Engineering, 2014,(36)11:2069.
[18]	王铁行. 非饱和黄土路基水分场的数值分析[J]. 岩土工程学报,2008,30(1):41. WANG Tiehang. Moisture migration in unsaturated loess subgrade[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(1):41.