Experimental research on influence of root content on strength of undisturbed and remolded grassroots-reinforced soil
WANG Yuan-zhan1,LIU Xu-fei1,ZHANG Zhi-kai2,MA Dian-guang3,CUI Yan-qiang4
1. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, National Key Laboratory of Water Conservancy Engineering Simulation and Security, Tianjin University, Tianjin 300072, China; 2. CCCC-FHDI Engineering Co., Ltd., Guangzhou 510230, China; 3. Key Laboratory of Engineering Sediment of Ministry of Transport, Tianjin Research Institute for Water Transport Engineering, Tianjin 300456, China; 4. Key Laboratory of Harbor and Marine Structure Safety of Ministry of Communication, Tianjin Research Institute for Water Transport Engineering, Tianjin 300456, China
Abstract：Laboratory triaxial tests are carried out in order to understand the strength property of undisturbed and remolded grassroots-reinforced soil (UGRS and RGRS). The influence of root content on soil strength is investigated. Moreover, the strength difference between the two soils is quantitatively described by root content. The laboratory test results show that: (1) As to UGRS, the increase of root content has little effect on the internal friction angle, while it can improve the cohesion which increases first and then keeps unchanged; (2) There is an optimal root content in RGRS making soil strength the highest, which increases with the increasing confining pressure; (3) When the root content in RGRS is 4~6 times that in UGRS, the deviator stresses of RGRS and UGRS in the limit equilibrium state are almost equal.
王元战,刘旭菲,张智凯,马殿光,崔衍强. 含根量对原状与重塑草根加筋土强度影响的试验研究[J]. 岩土工程学报, 2015, 37(8): 1405-1410.
WANG Yuan-zhan,LIU Xu-fei,ZHANG Zhi-kai,MA Dian-guang,CUI Yan-qiang. Experimental research on influence of root content on strength of undisturbed and remolded grassroots-reinforced soil. Chinese J. Geot. Eng., 2015, 37(8): 1405-1410.
[1] 谢晓华. 三维土工网植草在加固河岸边坡工程中的应用[J].水运工程, 2004(1): 71-72. (XIE Xiao-hua. Application of three-dimensional geonet sprig-grass for reinforcement of the side slope of bank[J]. Port & Waterway Engineering, 2004(1): 71-72. (in Chinese)) [2] ANDY G. Coir rolls combat bank erosion on Monmouthshire & Brecon Canal[J]. British Waterways, 2005, 6: 1-4. [3] 史云霞, 陈一梅. 国内外内河航道护岸型式及发展趋势[J].水道港口, 2007, 28(4): 261-264. (SHI Yun-xia, CHEN Yi-mei. Revetment type of inland waterway and its development trends at home and abroad[J]. Journal of Waterway and Harbor, 2007, 28(4): 261-264. (in Chinese)) [4] 王炜正. 新型生态护岸在连云港港疏港航道中的应用[J]. 水运工程, 2008(9): 135-139. (WANG Wei-zheng. Application of new ecological-type revetment in cargo-distributing channel of Lianyungang port[J]. Port & Waterway Engineering, 2008(9): 135-139. (in Chinese)) [5] 葛红群, 朱轶群. 芦苇生态护坡在京杭运河两淮段治理工程中的应用[J]. 南通大学学报（自然科学版）, 2009, 8(2): 62-64. (GE Hong-qun, ZHU Yi-qun. Application of reed ecological bank revetment in regulation project of Beijing-Hangzhou canal Huaian-Huaiyin ship lock section[J]. Journal of Nantong University (Natural Science Edition), 2009, 8(2): 62-64. (in Chinese)) [6] 杨亚川, 莫永京, 王芝芳, 等. 土壤-草本植被根系复合体抗水蚀强度与抗剪强度的试验研究[J]. 中国农业大学学报, 1996, 1(2): 31-38. (YANG Ya-chuan, MO Yong-jing, WANG Zhi-fang, et al. Experimental study on anti-water erosion and shear strength of soil-root composite[J]. Journal of China Agricultural University, 1996, 1(2): 31-38. (in Chinese)) [7] 张谢东, 石明强, 沈雪香, 等. 高速公路生态防护根系固坡的力学试验研究[J]. 武汉理工大学学报（交通科学与工程版）, 2008, 32(1): 59-61. (ZHANG Xie-dong, SHI Ming-qiang, SHEN Xue-xiang, et al. Experimental research on plant-mechanical analysis for highway eco-protection slope[J]. Journal of Wuhan University of Technology (Transportation Science & Engineering), 2008, 32(1): 59-61. (in Chinese)) [8] 张 锋, 凌贤长, 吴李泉, 等. 植被须根护坡力学效应的三轴试验研究[J]. 岩石力学与工程学报, 2010, 29(增刊2): 3979-3985. (ZHANG Feng, LING Xian-zhang, WU Li-quan, et al. Triaxial experimental study of mechanical effect of slope protection with vegetation fibril[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(S2): 3979-3985. (in Chinese)) [9] 陈昌富, 刘怀星, 李亚平. 草根加筋土的室内三轴试验研究[J]. 岩土力学, 2007, 28(10): 2041-2045. (CHEN Chang-fu, LIU Huai-xing, LI Ya-ping. Study on grassroots-reinforced soil by laboratory triaxial test[J]. Rock and Soil Mechanics, 2007, 28(10): 2041-2045. (in Chinese)) [10] 胡其志, 周 政, 肖本林, 等. 生态护坡中土壤含根量与抗剪强度关系试验研究[J]. 土工基础, 2010, 24(5): 85-87. (HU Qi-zhi, ZHOU Zheng, XIAO Ben-lin, et al. Experimental research on relationship between root weight and shearing strength in soil[J]. Soil Engineering and Foundation, 2010, 24(5): 85-87. (in Chinese)) [11] 刘秀萍, 陈丽华, 宋维峰. 林木根系与黄土复合体的抗剪强度试验研究[J]. 北京林业大学学报, 2006, 28(5): 67-72. (LIU Xiu-ping, CHEN Li-hua, SONG Wei-feng. Study on the shear strength of forest root-loess composite[J]. Journal of Beijing Forestry University, 2006, 28(5): 67-72. (in Chinese)) [12] SL237—1999 土工试验规程[S]. 1999. (SL237—1999 Specification of soil test[S]. 1999. (in Chinese))
