摘要
对于土石坝边坡稳定性的分析,传统的方法是简化毕肖普法或者瑞典圆弧法,实现对上下游边坡滑动安全系数的明确,而后依照规范,进行边坡稳定性等级的判定。价值效应原理采用初始应力的方式,将渗流场引入位移应力分析范畴,应用强度折减法对坝体的整体全面进行弹塑性分析,在此基础上依据塑性区贯通和位移突变失稳进行判定,获得坝坡的最小安全系数,将其与简化毕肖普法计算结果进行对照。结合实践可以发现,强度折减法对土石坝边坡稳定性的分析具有一定的可行性。同时,问题也存在,要进行全面分析和解决。
For earth and rockfill dam slope stability analysis,the traditional way,simplified Bishop method or thecircular arc Swedish method,is adopted to confirm upstream and downstream slope sliding safety coefficients,andthen to complete the evaluation of slope stability in accordance with the specification.The way of initial stress isadopted to value effect principle;the seepage field is introduced into displacement stress analysis;strength reductionmethod is used for overall elastoplastic analysis of the dam.Based on the above,the instability is measured accordingto the breakthrough of the plastic zone and displacement mutation in order to obtain the minimum safety coefficient ofdam slope.Then compare it with the calculation results of the simplified Bishop method.It proves feasible to analyzeearth-rockfill dam slope stability with strength reduction method,though problems exist and comprehensive analysisis needed.
作者
张敏
ZHANG Min(Guangdong Hydropower Planning & Design Institute, Guangzhou 510635, China)
出处
《广东水利电力职业技术学院学报》
2016年第4期13-15,共3页
Journal of Guangdong Polytechnic of Water Resources and Electric Engineering
关键词
强度折减法
土石坝
边坡稳定
分析
strength reduction method
earth and rockfill dam
slope stability
analysis