模拟降雨条件下寒旱地区边坡土体位移及土压力特征

为深入研究降雨条件下寒旱地区植物边坡与裸坡浅层位移及土压力特征,定量评价植物护坡效应,以位于西宁盆地的青海大学自建试验区为例,通过对柠条锦鸡儿边坡与裸坡开展原位模拟降雨试验,系统分析两种边坡浅层土体的土压力值及其水平、垂直方向上位移量变化规律;在此基础上评价这两种类型边坡的稳定性。得到以下主要结论:降雨前后,柠条锦鸡儿边坡a层(边坡表层以下0~20 cm)、b层(边坡表层以下(20~40 cm)土体含水率增加幅度均较裸坡降低32.03%、13.63%,反映出模拟降雨过程中植物茎叶起到降雨截流作用;降雨后两种边坡平均土压力值均较降雨前略高,其中裸坡增加0.125 k Pa,柠条锦鸡儿边坡增加0....

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Bibliographic details
Volume: 45
Main Author: 窦增宁;赵玉娇;刘昌义;胡夏嵩;徐志闻;卢海静
Format: Journal Article
Language: Chinese
Place of publication: 青海大学地质工程系,青海西宁,810016%青海大学地质工程系,青海西宁 810016 2018
中国科学院青海盐湖研究所,青海西宁 810008
published in: 水文地质工程地质 Vol. 45; no. 2; pp. 117 - 122
Data of publication: 2018
ISSN: 1000-3665
Alternate Title: Soil displacement and earth pressure characteristics of slopes in a cold and arid region under rainfall simulation
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Bibliography: DOU Zengning1 , ZHAO Yujiao1 , LIU Changyi1 , HU Xiasong1,2 , XU Zhiwen1 , LU Haijing1 ( 1. Department of Geological Engineering, Qinghai University, Xining, Qinghai 810016, China ; 2. Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai 810008, China)
The displacement and earth pressure characteristics of the vegetated slope and the bare slope in a cold and arid region under rainfall condition are explored to quantitatively analyze and evaluate the slope protection effects of plants. The self-built test area is located in Qinghai University of Xining Basin. Through in-situ rainfall simulation to the bare slope and the slope vegetated with Caragana Korshinskii. kom,the earth pressure values of the two slope surfaces are analyzed. Changes in the displacement in both the horizontal and vertical directions are analyzed as well. The stability of two kinds of slopes in the test area is evaluated. The results show that as to the slope vegetated with C. Korshinskii before and after the rainfa
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