基于临界滑动场的滑坡风险分析  

Risk analysis of landslide volume based on critical sliding field

作　　者：吴光耀 卢坤林[2] WU Guangyao;LU Kunlin(School of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China;School of Civil and Hydraulic Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]安徽建筑大学土木工程学院,安徽合肥230601 [2]合肥工业大学土木与水利工程学院,安徽合肥230009

出　　处：《山东建筑大学学报》2024年第3期12-17,38,共7页Journal of Shandong Jianzhu University

摘　　要：建立滑坡风险评估模型可为滑坡风险分析提供有效的途径。文章通过临界滑动场得到危险滑面滑动体积,比较不同坡高、坡度、黏聚力和内摩擦角下的滑动体积,得到不同因素对滑动体积的影响,结合滑坡破坏概率、时间危险度、易损度进行滑坡风险分析。结果表明:黏聚力和内摩擦角比值相同且数值较小情况下,取值对滑动体积和滑坡风险影响不大;安全系数最小滑面并不一定是易损度和滑坡风险最大滑面。定量计算不同情况下的滑坡风险比以安全系数最小滑面确定滑坡风险更为完善,并可为滑坡风险分析提供参考。Establishing a landslide risk assessment model can provide an effective approach for landslide risk analysis.This study obtains the sliding volume of the dangerous sliding surface through the critical sliding field,and compares the effect of different slope heights,gradients,cohesive forces,and internal friction angles on these volumes.Landslide risk is further analyzed by considering the landslide failure probability,temporal risk and vulnerability.The results indicate that when the ratio of cohesion to internal friction angle is the same and the value is small,the value has little influence on the sliding volume and landslide risk.The slide surface with the minimum safety factor is not necessarily the slide surface with the greatest vulnerability and landslide risk.Quantitative calculation of landslide risk under different conditions is more complete than relying solely on the slide surface with minimum safety factor,which can provide a reference for landslide risk analysis.

关 键 词：滑坡 风险分析 临界滑动场 滑动体积 

分 类 号：TU473[建筑科学—结构工程]