紫穗槐根系对黄土边坡加固作用的试验研究  

Experimental Study on the Effects of Amorpha Fruticosa Root System on Loess Slope Reinforcement

作　　者：陈航[1] 张慧莉[1] 田堪良[2,3] 钟佩文 

机构地区：[1]西北农林科技大学水利与建筑工程学院陕西杨凌,712100 [2]西北农林科技大学水土保持研究所陕西杨凌,712100 [3]中国科学院水利部水土保持研究所陕西杨凌,712100

出　　处：《人民黄河》2017年第10期84-88,共5页Yellow River

基　　金：国家重点研发计划项目(2017YFC0504703);陕西省科技统筹创新工程计划项目(2013KTDZ03-03-01)

摘　　要：植物护坡措施对黄土边坡稳定及生态环境修复具有重要作用。通过对陕北治沟造地工程中黄土以及紫穗槐根系与黄土的复合土体抗剪强度的试验研究,分析了含水率及含根量对土体抗剪强度的影响。根土复合土体的抗剪强度符合库仑定律,并随着含水率的增大而减小;随着含根量的增加,附加黏聚力增量较大,变化范围为1.46~14.67 kPa;内摩擦角增量较小,变化区间为1.0°~3.5°。采用FLAC3D岩土工程数值计算软件分析了紫穗槐根系对黄土边坡的加固作用,含水率为12%的种植紫穗槐的坡体最稳定,安全系数最大为3.06。Plant slope protection measures are important for loess slope stability and ecological environment restoration. Through the experi-mental study on shear strength of loess and amorpha fruticosa root-soil composite of the gully reclamation project in northern Shaanxi,the effects of water and root content on shear strength of soil were analyzed. The shear strength of root-soil composite can be described by Cou-lomb Equation,and decreases with the increase of water content. With the increase of root content,the increment of the additive cohesion Ac is larger,ranging from 1.46-14.67 kPa. The internal friction angle increment A（p is smaller,ranging from 1 .0 -3 .5 degrees. The reinforce-ment effect of amorpha fruticosa root system on loess slope was analyzed by using FLAC3D software,the largest safety factor was 3.06 under the condition of 12% water content with amorpha fruticosa root system.

关 键 词：紫穗槐根系 根土复合土体 加固作用 稳定分析 黄土边坡 

分 类 号：S157.2[农业科学—土壤学]