重庆某气井场边坡稳定性分析

Slope Stability Analysis of a Gas Well Site in Chongqing

重庆市某井场滑坡位于低山山顶部,暴雨情况下其南侧发生了滑坡变形,出现挡墙变形、围墙开裂、地面塌陷等情况,不但影响天然气开采,更为场区的施工、人员安全埋下隐患,从而造成巨大损失。从边坡的地质环境条件和岩土体特性出发,采用二维有限元数值模拟方法,对边坡的稳定进行了分析评价。

The gas well site in Chongqing is located at the top of a rolling hill. A landslide occurred after several heavy rains since 2011. Within the landslide affected area, the deflection at the retaining walls, cracks on the vertical fence walls, and sub- sidence on the ground surface are observed. The landslide is a very common geo-hazard in the region. The slope instability haz- ard will not only adversely affect the gas extraction, but also infers a potential safety concerns for the site personnel and con- struction and even causes a huge loss of both property and human life. This paper presents the two-dimensional finite element method applied in the slope stability evaluation based on the characteristics of the geological and subsurface conditions of the site.