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红粘土边坡长期暴露在环境中会出现各种失稳破坏,影响工程施工进度及道路运营安全。坡率是影响红粘土边坡长期稳定性的重要因素,工程防护中确定合理的坡率是至关重要的。本文首先根据红粘土边坡自身特点对简化Bishop法进行改进,并且采用改进的简化Bishop法对无防护条件下的红粘土边坡安全坡率进行了推导。然后,结合贵州省内多条公路红粘土边坡破坏情况调研结果,对坡率、防护类型以及破坏情况之间的关系进行了统计分析,得出了不同防护措施下红粘土边坡的适用安全坡率。
Long-term exposure of red clay slope in the environment will occur a variety of instability damage, affecting the progress of construction and road safety. Slope rate is an important factor affecting the long-term stability of red clay slope. It is very important to determine the reasonable slope rate in engineering protection. In this paper, the simplified Bishop method is improved based on the characteristics of the red clay slope, and the simplified slope Bishop method is used to deduce the safety slope of the red clay slope under unprotected conditions. Then, based on the investigation of the damage status of the red clay slope in Guizhou Province, the relationship between the slope rate, the type of protection and the damage is statistically analyzed, and the applicable safety of the red clay slope under different protective measures is obtained Slope rate.