摘要
公路建设中经常会遇到顺层边坡,结构面倾角与坡面一致,对稳定形势不利,不合理开挖会加剧这种不利影响。以某公路顺层边坡为研究对象,从地质角度分析了其稳定性和破坏机制。在此基础上,建立了相对软弱层不同坡脚埋深厚度的工况,利用UDEC离散元软件对其进行了计算。经过对安全系数、位移矢量和塑性区计算结果的分析,发现软弱层角砾岩、泥灰岩埋深大于15 m坡体才是安全的,否则坡体会直接失稳,且滑体厚度较大,很难治理。
Rocky bedding slope is usually encounted in highway construction,where the dip angle of structure plane is consistent with the slope,which is unfavourable to slope stability,especially in the unrational excavation situation.Firstly,the failure mechanism and stability for highway rocky bedding slope is analysed with the geological method in this paper.Secondly the calculation for variant buried depth of the slope toe relative to soft stratum is conducted by using UDEC.Based on the analysis of calculation results for safety factor,displacement vector and plastic zone,it is found that the soft stratum（shatter belt and marlite） with the depth over 15 m is the critical dimension for the slope stability.
出处
《水利与建筑工程学报》
2011年第5期82-86,共5页
Journal of Water Resources and Architectural Engineering
关键词
公路岩质边坡
UDEC
顺层
稳定性
highway rocky slope
Universal Distinct Element Code
bedding
stability
