新伊高速膨胀土深挖路堑边坡稳定分析

Stability Analysis of Cutting Slope Excavated by Xinyi Expressway

膨胀土是一种微观上具有膨胀结构的特殊土,遇水体浸蚀后,体积呈膨胀性;而失水后,体积呈收缩性。外观以褐色、棕色,红色、黄色、灰白色和灰绿色居多,如处理不当,对交通基础设施的基础结构均会产生严重的破坏作用,常被工程界称为灾害性土。因此,做好膨胀土处理,是保证膨胀土地段施工安全的重要问题。以新伊高速公路XYTJ_2A标段膨胀土深挖路堑施工为背景,对边坡稳定性问题进行重点研究,对不同含水率下边坡稳定系数进行了验算,有效保证了边坡稳定和施工安全。

Expansive soil is a special soil with an expansive structure on the microscopic level.Its characteristics after encountering water are:after being eroded by water,the volume is expansive.After dehydration,the volume shrinks.The appearance of the expansive soil is mostly tan,brown,red,yellow,gray and gray-green,and may cause serious damage to the infrastructure of the transportation facilities if not handled properly,and not easy to repair.So it is often referred to as severe soil engineering.Therefore,the proper treatment of expansive soil is an important issue to ensure the construction safety of expansive land section.This paper takes the expansive soil deep cutting construction in the XYTJ_2A tender section of Xinyi Expressway as the background,focuses on the slope stability problem,and checks the slope stability coefficient under different moisture contents,which effectively ensures the slope stability and construction safety,which effectively ensures the slope stability and construction safety.