不同开挖坡率下鄂西某公路岩质高陡边坡稳定性研究

STUDY ON STABILITY OF HIGH AND STEEP ROCK SLOPE OF A HIGHWAY IN WESTERN HUBEI UNDER DIFFERENT EXCAVATION SLOPE RATES

随着我国交通量不断增高,部分低等级公路需要改扩建以提升交通运输能力。但是我国西部地区构造活动强烈,地质条件复杂,生态环境脆弱,公路改扩建必将受到环境保护与耕地红线的制约。依托鄂西某改扩建公路实例,在介绍地质背景基础上,通过数值模拟方法研究不同坡率开挖后,边坡的应力应变场特征,研究得出反向结构的岩质高陡边坡,可采用较大坡率开挖,边坡整体稳定性较好,同时减小开挖范围,保护环境的同时节约耕地,降低工程造价。

With the development of social economy,the traffic volume continues to increase,and some low-grade highways need to be rebuilt and expanded to enhance the transportation capacity.However,the western region of China has strong tectonic activities,complex geological conditions,and fragile ecological environment.Highway reconstruction and expansion will inevitably be restricted by environmental protection and the red line of cultivated land.Relying on engineering examples,the stress and strain field characteristics of slopes excavated at different slope rates are studied by numerical simulation methods.It is believed that for high-steep rock slopes with reverse structure,higher slope rates can be used to excavate,and the slopes are overall stable It has better performance,while reducing the scope of excavation,saving arable land while protecting the environment,and reducing project cost.