摘要
Abstract
Aiming at the stability problem of an existing slope during the slope cutting stage in the reconstruction and expansion project of Lundu Road of the Shiziyang Passageway,the Midas GTS software was used to establish a slope calculation model based on the actual geological data.Three typical working conditions were selected,and the strength reduction method was adopted to analyze the plastic zone of the rock mass,the distribution of maximum shear stress and the safety factor,so as to determine the slip and collapse risks and the stability of the slope during the slope cutting process.In addition,through static analysis,the displacements of the rock mass under various working conditions were obtained,providing suggestions for the monitoring methods in the construction stage.The results show that by comparing the slope stability under the three working conditions,the slope remains stable throughout the slope cutting stage.However,the state of the slope after cutting without support is the most dangerous working condition,and it is necessary to reinforce the slope in a timely manner.During the entire construction stage,the surface displacement of the slope is not obvious,but there is rebound uplift inside the rock mass.Therefore,it is necessary to adopt a monitoring method combining surface displacement monitoring and deep horizontal displacement monitoring to monitor the slope stability during the construction stage.关键词
岩质边坡/公路改扩建/锚杆Key words
Rock slope/Highway reconstruction and expansion/Anchor bolt分类
交通工程
