坡体外形对松散堆积体路基上边坡稳定性影响分析  

Impact of Slope Shape on Slope Stability with Loose Deposits Subgrade

作　　者：毛雪松[1] 肖亚军[1] 王铁权 刘龙旗 

机构地区：[1]长安大学公路学院,西安市710064 [2]陕西铁路工程职业技术学院,渭南市714025

出　　处：《公路》2017年第11期36-41,共6页Highway

基　　金：中央高校基本科研业务费自助项目,项目编号310821162012;310821161023

摘　　要：基于川藏公路南线(西藏境国道318线K3473+000~K4670+000和国道214线K1324+000~K1473+000)的实地调研成果,采用Midas/GTS建立边坡稳定数值模型,分析坡形因素即坡顶平台宽度、坡高、坡度、两级边坡对松散堆积体路基上边坡稳定性的影响。在改变单级边坡坡度和坡高的条件下,分析了松散堆积体路基上边坡安全系数及坡体应力、最大剪应变、坡体位移在坡中、坡脚处的变化趋势。模拟结果表明,分级边坡可以较明显地提高松散堆积体边坡的稳定性。相较于上级边坡坡度变化对于坡体安全系数影响而言,下级边坡坡度变化导致坡体安全系数变化更为明显。Based on the site survey results to the south line of the Sichuan-Tibet Highway which is K3473＋000-K4670＋000 section of National Highway No. 318 and K1324＋000-K1473＋000 section of National Highway No. 214, Midas/GTS is used to establish the numerical model for slope stability analysis to analyze the impact of slope shape on the slope stability of loose deposits subgrade including the factors of width on slope top, slope height, slope ratio, and two stages of slope. When change the single-stage slope ratio and slope height, the slope safety coefficient and slope stress, maximum shear strain and slope displacement vary trend in medium slope and slope toe are analyzed. The simulation results show that the staged slope can significantly improve the stability of the loose accumulation body. Compared to the upper slope, vary of the lower slope ratio has a more obvious change of the safety factor.

关 键 词：松散堆积体 坡形 稳定性 Midas/GTS数值模拟 

分 类 号：U416.1[交通运输工程—道路与铁道工程]