摘要
以植被作用下开挖边坡为工程背景,采用塑性极限分析及强度折减法,结合植物根形态特征函数,推导了植被作用下开挖边坡的稳定安全系数的上限显式解。定量研究了植被作用下边坡开挖参数及植被形态参数对开挖边坡稳定性的影响以及同等条件下的无植被作用开挖边坡安全稳定系数。研究结果表明:(1)增加开挖距离,开挖边坡周围植被对边坡的稳定影响逐渐减弱,但增加开挖角,其影响却基本不变;(2)增加植被根径延伸长度与抗拉强度,边坡稳定性均有明显增加,但增加植物自重,边坡稳定系数变化不明显。
Taking the excavated slope under vegetation effect as the engineering background, the upper-bound explicit solution of the safety factor for the stability of the slope under the vegetation effect is derived in combination with the characteristic function of the vegetation root morphology with the plastic limit analysis and strength reduction method. Furthermore, the impacts from the parameters of the slope excavation under the vegetation effect and the parameters of the vegetation morphology on the stability of the slope excavation as well as the safety and stability coefficient for the slope excavation without the vegetation effect are quantitatively studied. The study result shows that： （ 1 ） the stability effect from the vegetation around the excavated slope on the slope stability gradually increases along with the increase of the excavation distance, however, its effect is invariable, if only increasing the excavation angle; （2）the slope stability can be obviously enhanced by increasing both the extending length and the tensile strength of the vegetation root, nevertheless, the slope stability coefficient is not obviously changed, if only increasing the self- weight of vegetation.
出处
《水利水电技术》
CSCD
北大核心
2015年第12期36-39,43,共5页
Water Resources and Hydropower Engineering
关键词
植被边坡
塑性极限分析
强度折减法
安全系数
显式解
slope with vegetation
plastic limit analysis
strength reduction method
stability factor
explicit solution
