摘要
基于老挝某在建水电站溢洪道边坡,在分析边坡稳定性影响因素基础上,选取岩体容重、结构面粘聚力、内摩擦角、爆破振动作用作为主要影响因素,将爆破作用转化为振动加速度并引入边坡稳定计算中,利用正交设计试验对各项指标进行交互组合,通过灰关联分析法计算各因素对稳定系数的关联度,计算敏感性排序为:爆破振动作用>内摩擦角>粘聚力>容重,表明爆破振动作用对边坡稳定影响最大,其次为抗剪强度指标。因此若要保证边坡后续稳定,需控制爆破作用的影响,并采取工程措施增加边坡结构面抗剪强度。此方法可为类似节理边坡治理提供借鉴。
Taking the spillway slope of a hydropower station under construction in Laos as study object and on the basis of analyzing the factors influencing slope stability,the paper selects unit weight,internal friction angle,cohesive and blasting vibration as main impacting factors and transform the blasting action into vibration acceleration which is introduced into the slope stability calculation.Each factor index are combined interactively by orthogonal design experiment,the correlation degree of each factor index to stability coefficient is calculated by grey correlation analysis method.According to the calculation results,the order of sensitivity is:blasting vibration>internal friction angle>cohesion>unit weight,indicating that blasting vibration has the greatest impact on slope stability,followed by shear strength index.In order to ensure the stability of the slope,it is necessary to control the impact of blasting and take engineering measures to increase the shear strength of the joints.This method can provide a reference for the treatment of similar jointed slopes.
作者
范新宇
张争
陈国将
杨天俊
FAN Xinyu;ZHANG Zheng;CHEN Guojiang;YANG Tianjun(Northwest Engingeering Corporation Limited ,Xi'an 710065,China)
出处
《西北水电》
2021年第6期61-64,74,共5页
Northwest Hydropower
关键词
节理边坡
影响因素
正交设计
敏感性分析
jointed slope
influence factor
orthogonal design
sensitivity analysis
