典型草-灌植物根径变化对生态护岸稳定性的影响  

Effects of changes in root diameter of typical grass-shrub plants on the stability of ecological revetment

作　　者：周子棚 丁洋 薛洋 赵进勇[1,2] 陈汪洋 王琦 ZHOU Zipeng;DING Yang;XUE Yang;ZHAO Jinyong;CHEN Wangyang;WANG Qi(China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Key Laboratory of Water Safety for Beijing-Tianjin-Hebei Region of Ministry of Water Resources,Beijing 100038,China;China Water Investment Co.Ltd.,Beijing 100053,China)

机构地区：[1]中国水利水电科学研究院,北京100038 [2]水利部京津冀水安全保障重点实验室,北京100038 [3]中国水务投资集团有限公司,北京100053

出　　处：《中国水利水电科学研究院学报(中英文)》2025年第2期194-204,共11页Journal of China Institute of Water Resources and Hydropower Research

基　　金：水利部重大科技项目(SKS-2022071);中国电力建设股份有限公司科技项目(KJ-2023-187);中国水利水电科学研究院基本科研业务费项目(WE0145B042021)。

摘　　要：生态护岸植被根系深埋在土体中不易被观测,在生长过程中对岸坡稳定影响的研究还存在许多不足,而在根系固土的边坡稳定性模拟方面,现有研究多集中在植被的种植位置或根长变化对护岸稳定性提升多少的比较,很少有研究分析植物根径变化对护岸稳定性产生的影响。本文采用有限元强度折减法,以永定河莲石湖两岸边坡为例,通过MIDAS软件,建立岸坡根土复合体的有限元模型,分别以素土岸坡,不同根径下的狗牙根护岸、连翘护岸、狗牙根与连翘组合的护岸类型为研究对象,计算这四种情况下岸坡稳定安全系数和变形的最大位移量,定量分析植物根径变化对护岸稳定性的影响。结果显示,对于同类型生态护岸,稳定性随植被根径的增加而增加;对于不同生态护岸,在狗牙根护岸、连翘护岸和狗牙根-连翘的护岸中,当根径达到最大值时,岸坡稳定安全系数分别比素土岸坡提高了4.376%、30.2%和39.1%;岸坡变形的最大位移量分别比素土岸坡减小了7.16%、32.6%和41.7%。稳定性由强到弱的护岸类型为:狗牙根-连翘护岸>连翘护岸>狗牙根护岸>素土护岸。通过根径变化的不同生态护岸稳定性的分析计算,加深了植物根系固土的认识,为生态护岸工程植被的配置提供了参考依据。The ecological bank protection vegetation root system buried deep in the soil body is not easy to be observed,in the process of growth on the slope stability of the research there are still many deficiencies,and in the root system of soil stabilization of slope stability simulation,the existing research is mostly focused on the planting position of vegetation or root length changes on the stability of the bank to enhance the number of comparisons,and very few studies to analyze the effect of changes in the root diameter of plants on the stability of the bank.This study adopts the finite element strength reduction method,taking the slopes on both sides of Lianshi Lake in Yongding River as an example.Through MIDAS software,a finite element model of the root soil composite of the bank slope is established,and the influence of plant root diameter changes on the stability of the bank slope is quantitatively analyzed by analyzing and calculating the plain soil bank slope,Cynodon dactylon revetment,Weeping forsythia revetment,and the combination of Cynodon dactylon and Weeping forsythia revetment under different root diameters.The results show that for the same type of ecological revetment,stability increases with the increase of vegetation root diameter;For different ecological revetments,when the root diameter reaches its maximum value,the stability and safety factors of the bank slope are 4.376%,30.2%,and 39.1%higher than those of the plain soil bank slope in Cynodon dactylon revetments,Weeping forsythia revetment,and Cynodon dactylon-Weeping forsythia revetments;The maximum displacement of the bank slope deformation was reduced by 7.16%,32.6%,and 41.7%,respectively,compared to the plain soil bank slope.The types of revetments with varying degrees of stability are:Cynodon dactylon-Weeping forsythia revetments>Weeping forsythia revetment>Cynodon dactylon revetment>plain soil revetment.The analysis and calculation of the stability of different riparian types through the root diameter change deepens the understanding of

关 键 词：生态护岸 根系直径 有限元强度折减法 根系固土 护岸稳定性 

分 类 号：TV861[水利工程—水利水电工程]