8度地震烈度区新民隧道出口处边坡的稳定性  

Slope stability at the exit of Xinmin Tunnel in 8 degree seismic intensity area

作　　者：王心泉 王智猛[3] 牛犇 蒋恒[3] 冯春[1,2] WANG Xinquan;WANG Zhimeng;NIU Ben;JIANG Heng;FENG Chun(Institute of Mechanics,Chinese Academy of Science,Beijing 100190,China;School of Engineering Science,University of Chinese Academy of Sciences,Beijing 100049,China;China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,Sichuan,China;School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]中国科学院力学研究所,北京100190 [2]中国科学院大学工程科学学院,北京100049 [3]中国中铁二院工程集团有限责任公司,四川成都610031 [4]河北工业大学土木与交通学院,天津300401

出　　处：《山东大学学报（工学版）》2023年第3期23-30,40,共9页Journal of Shandong University（Engineering Science）

基　　金：国家重点研发计划资助项目(2018YFC1505504)。

摘　　要：为预防地震导致的滑坡对道路的危害,保证交通的安全性,基于连续-非连续单元法,根据新民隧道出口高陡岩质边坡地质资料建立数值分析模型,采用数值模拟方法对该高陡岩质边坡进行地震作用下的稳定性分析。研究表明,该处边坡在自然状态下处于基本稳定状态,在地震作用下,坡体前部出现破裂,出现岩石掉落情况。针对破裂岩体,对不同加固方式下的边坡安全系数进行分析,模拟发现隧道上方倒悬体在地震作用后具有较高的破裂崩塌风险,需进行重点加固。In order to prevent the hazard of landslides caused by earthquake on the road and ensure the safety of traffic,based on the continuum-discontinuum element method,a numerical analysis model was established according to the geological data of high and steep rock slope at the exit of Xinmin Tunnel.The model used numerical simulation to analyze the stability of the slope under earthquake action.Study showed that under the action of an earthquake,the front part of the slope body broke and rock fell.In view of the fractured rock mass,the safety factor of slope under different reinforcement methods was analyzed.It was found that the overhanging body above the tunnel had a high risk of rupture and collapse after earthquake action,which needed to be strengthened.

关 键 词：连续-非连续单元法 边坡稳定性 地震 加固支护 数值模拟 

分 类 号：TU43[建筑科学—岩土工程]