草本植物根系对土体的加筋作用模型修正

doi:10.13722/j.cnki.jrme.2015.0704

摘要
图/表
参考文献(17)
相关文章 (15)

全文: PDF (1533 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要边坡上的草本植物有助于减缓雨水对边坡的冲刷，提高土体浅层的抗剪强度等一系列优点。本文对前人所提出的草本植物根系对土体的加筋理论模型分别进行分析和评价，得出各自的优缺点。以二者建立的根系作用模型为基础，引入剪切深度系数并对模型进行修正和完善，得到新的根土作用简图，实现垂直压力、剪切位移、剪切深度系数及根径对整个剪切过程的描述。将高寒草地植物矮火绒草根及盐地凤毛菊草根原状根土复合体直剪试验所测得的参数代入修正后的模型当中，得到修正后的模型计算出的草本植物根系对土体的加筋幅度要小于Waldron模型，但修正模型得出的结果与试验结果最为接近。因此，对根系受力情况考虑更为详细的修正后的模型在草本植物根系加筋效果计算方面优于Waldron模型。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	文伟
	李光范
	胡伟
	刘惠江
	项文

关键词 ：边坡工程, 直剪试验, 垂直压力, 深度剪切系数, 剪切变形角

Abstract：The herbs living in the slope is helpful to decrease the erosion of the rain to the soil，improving the resistance shear strength of the shallow soil and so on. The article has been analysis and assessment the WU.T.H and Waldron model separately that herbs rootss reinforced effect can be calculated by formulas. Obtained the advantage and disadvantage respectively. Based on the WU.T.H and Waldron model，introduced the depth of the coefficient，revised and improved the initial model of reinforcement soil，obtained the new interactive diagram of root and soil，the model can describe the whole shear process used by pressure，shear displacement，the depth of the coefficient and the root diameter. Introduce the parameters obtained by two roots-soil shear test to the modify model，concluded the results calculated by modified model less than the Waldron model，while the results calculated by modified model was most close to the test value. So，the modified model was better than the Waldron model.

Key words： slope engineering direct shear test vertical pressure the depth of the coefficient shear deformation angle

引用本文:

文伟，李光范，胡伟，刘惠江，项文. 草本植物根系对土体的加筋作用模型修正[J]. 岩石力学与工程学报, 2016, 35(S2): 4211-4217.
WEN Wei，LI Guangfan，HU Wei，LIU Huijiang，XIANG Wen. Modification of reinforcement effect model of herbs root system in soil. , 2016, 35(S2): 4211-4217.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2015.0704 或 https://rockmech.whrsm.ac.cn/CN/Y2016/V35/IS2/4211

[1] 肖盛燮，周辉，凌天清. 边坡防护工程中植物根系的加固机制与能力分析[J]. 岩石力学与工程学报，2006，25(增1)：2 670–2 674. (XIAO Shengxie，ZHOU Hui，LING Tianqing. Mechanism and ability analysis of plant root reinforcement in slope protection[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(Supp.1)： 2 670–2 674.(in Chinese))

[2] 杨永红，刘淑珍，王成华. 浅层滑坡生物治理中的乔木根系抗拉实验研究[J]. 水土保持研究，2007，14(1)：138–140.(YANG Yonghong，LIU Shuzhen，WANG Chenghua. A study of tensile strength tests of arborous species root system in forest engineering technique of shallow landslide[J]. Research of Soil and Water Conservation，2007，14(1)：138–140.(in Chinese))

[3] 闫海燕. 香根草根土复合体力学性能研究[硕士学位论文][D]. 重庆：重庆交通大学，2013.(YAN Haiyan. Research on mechanical properties of vetiver，root-soil composite[M. S. Thesis][D]. Chongqing：Chongqing Jiaotong University，2013.(in Chinese))

[4] 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)：2 041–2 045.(CHEN Changfu，LIU Huaixing，LI Yaping. Study on grassroots-reinforced soil by laboratory triaxial test[J]. Rock and Soil Mechanics，2007，28(10)：2 041–2 045.(in Chinese))

[5] 余芹芹，乔娜，卢海静. 植物根系对土体加筋效应研究[J]. 岩石力学与工程学报，2012，31(增1)：3 216–3 223.(YU Qinqin，QIAO Na，LU Haijing. Effect study of plant roots reinforcement on soil[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(Supp.1)：3 216–3 223.(in Chinese))

[6] 言志信，宋杰，蔡汉成. 草本植物加固边坡的力学原理[J]. 土木建筑与环境工程，2010，32(2)：30–34.(YAN Zhixin，SONG Jie，CAI Hancheng. Mechanical analysis of herbaceous plant strengthening slope[J]. Journal of Civil Architectural and Environmental Engineering，2010，32(2)：30–34.(in Chinese))

[7] 宋维峰，陈丽华，刘秀萍. 林木根系的加筋作用试验研究[J]. 水土保持研究，2008，25(2)：99–102.(SONG Weifeng，CHEN Lihua，LIU Xiuping. Experiment on forest roots reinforcement mechanism[J]. Reasearch of Soil and Water Conservation，2008，25(2)：99–102.(in Chinese))

[8] 周云艳. 植物根系固土机理与护坡技术研究[博士学位论文][D]. 武汉：中国地质大学，2010.(ZHOU Yunyang. Study on mechanism of soil reinforcement by roots and slope protection technology[Ph. D. Thesis][D]. Wuhan：China University of Geosciences，2010.(in Chinese))

[9] 薛方. 根–土相互作用及植被防护边坡浅层稳定性分析[硕士学位论文][D]. 成都：西南交通大学，2010.(XUE Fang. Aanalysis of root-soil interaction and shallow stability of vegetated slope[M. S. Thesis][D]. Chengdu：Southwest Jiaotong University，2010.(in Chinese))

[10] WU T H. Investigation of landslides on Prince of Wales Island[R]. Alaska：Department of Civil Engineering，Ohio State University，1976

[11] WALDRON L J，DAKESSIAN S. Effect of grass，legume，and tree roots on soil shear resistance[J]. Soil Science Society of America Journal，1982，46(5)：894–899

[12] WALDRON L J，DAKESSIAN S. Soil reinforcement by roots：calculation of increased soil shear resistance from root properties[J]. Soil Science，1981，132(6)：427–435

[13] 李光莹，虎啸天，李希来. 黄河源玛沁地区高寒草地植物固土护坡的力学效应[J]. 山地学报，2014，32(5)：550–560.(LI Guangying，HU Xiaotian，LI Xila. Mechanical effects of alpine grassland plants in slope protection in Maqin County of the Source Area of the Yellow river[J]. Mountain Research，2014，32(5)：550–560.(in Chinese))

[14] 刘小光. 林木根系与土壤摩擦锚固性能研究[硕士学位论文][D]. 北京：北京林业大学，2013.(LIU Xiaoguang. Study on friction and anchorage characteristics between roots system and soil[M. S. Thesis][D]. Beijing：Beijing Forestry University，2013.(in Chinese))

[15] 邢会文. 4种植物根–土界面摩阻特性研究[硕士学位论文][D]. 呼和浩特：内蒙古农业大学，2009.(XING Huiwen. Friction characteristics of soil-soil interface and root-soil interface of caragana itemedia and salix psamm pohila[M. S. Thesis][D]. Huhhot：Inner Mongolia Agricultural University，2009.(in Chinese))

[16] 陈丽华，余新晓，宋维峰. 林木根系固土力学机制[M]. 北京：科学出版社，2008：45–80.(CHEN Lihua，YU Xinxiao，SONG Weifeng. The mechanics mechanismof reinforcement of tree roots to soil[M]. Beijing：Science Press，2008：45–80.(in Chinese))

[17] 邓卫东，周群华，严秋荣. 植物根系固坡作用的试验与计算[J]. 中国公路学报，2007，20(5)：7–12.(DENG Weidong，ZHOU Qunhua，YAN Qiurong. Test and calculation of effect of plant root on slope consolidation[J]. China Journal of High Way and Transport，2007，20(5)：7–1.(in Chinese))