南水北调深开挖膨胀土渠道边坡稳定可靠度研究

摘要

针对南水北调深挖膨胀土渠道边坡稳定，将传统分析方法与概率可靠度理论结合，建立了边坡稳定体系可靠度模型。计算表明，渠坡内排水设施的有效性对渠坡稳定可靠度有显著影响，排水失效将导致边坡稳定失效概率大幅度提高；降低边坡土壤物理力学指标的变异度，可有效保证渠坡在施工与运行期间的稳定可靠度；所建边坡稳定体系可靠度模型，计算简单，便于工程实用。%Focus on the stability of China′s South-to-North Water Diversion high -cut stability of expansive soil slope , this paper combines the traditional analysis method with probability Theory and set up the reliable model for slope stability system.The calculation indicates that effectiveness of drainage facilities has a great influence on the reliability of slope stability.If drainage lose its func-tion, the probability of the slope stability failure will highly raise; there for reducing variation of physical and mechanical parameters of slope soil can effectively guarantee the stability of canal slope during the construction and operation period.The calculation of the reliable model for slope stability system is easy and practical.