沪蓉西主干线施谭坝边坡工程最优坡比分析

山区高速公路建设中会遇到大量的边坡开挖，其坡比对工程的设计与投资影响较大。因此研究边坡坡比的优化问 题，具有显著的经济效益和社会效益。为了保证边坡开挖工程既安全可靠又经济合理，在分析边坡工程地质条件的基础上，采用剩余推力法计算天然斜坡的稳定性。并根据规范从经济效益考虑，确定在开挖与支护总费用最低时的边坡开挖坡比为最优坡比。实例分析表明，施谭坝边坡工程的最优坡比为1: 0.65，该稳定性分析方法及最优坡比优化设计方案具有实用性和合理性。

Study of optimal design of the Shitanba slope at Hu-Rong West expressway

With the development of expressways,the slope excavation is increasingly manifold.The slope ratio has influence on the design and investment of project.Hence,the study of optimal slope ratio will make a lot of benefit of economy and society.In order to make sure the excavation engineering safe and economical,on the basis of engineering geological condition analysis,the residual thrust method is used to calculate the stability of nature slope.Then according to the economic analysis,the excavation slope ratio...