基于离散元法的顺层岩质边坡的地震响应分析  

Analysis of seismic responses of bedding rock slope based on DEM

作　　者：江婷 沈振中[1] 聂柏松[2] 刘冲[3] 谈家诚 JIANG Ting;SHEN Zhen-zhong;Nie Bai-song;LIU Chong;TAN Jia-cheng(College of Water Conservancy and Hydropower Engineering, Hohai University , Nanjing 210098, China;Power China Huadong Engineering Corporation Limited , Hangzhou 310000, China;College of Water Conser vancy and Hydropower Engineering , Hohai University , Nanjing 210098, China;College of Dayu , Hohai University , Nanjing 210098, China)

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,南京210098 [2]中国电建集团华东勘测设计研究院有限公司,杭州310000 [3]河海大学水利水电学院,南京210098 [4]河海大学大禹学院,南京210098

出　　处：《南水北调与水利科技》2017年第4期136-141,共6页South-to-North Water Transfers and Water Science & Technology

基　　金：江苏省自然科学基金青年基金(BK2012410);国家自然科学基金(51179062);江苏高校优势学科建设工程资助项目(3014-SYS1401);中央高校基本业务费用项目(2014B11914)~~

摘　　要：基于离散元法,结合某水电站厂房后缘顺层岩质边坡工程,研究缓倾角多结构面岩质边坡的地震响应规律及锚杆的加固效果,提出了该边坡抗震加固优化方案。研究表明:未加固顺层块状岩质边坡在地震过程中位移呈现阶梯式增长,地震结束时刻边坡岩块松散崩落;加固后边坡位移显著减小,且能在地震作用下保持稳定;锚杆的剪力响应与其附近结构面的相对位移相关性强,表明锚杆附近岩层面间的相对位移是激发锚杆加固作用的主要因素,在坡面出露且出露点低的岩层面在地震作用下相对位移较大,对应的锚杆承受剪力也较大,据此可更合理地布置锚杆。The seismic responses and anchor reinforcement effects of a bedding ster eoplasm rock slope with multiple structuralplanes behind the power house of a hydropower plant by use of the DEM,and aoptimalla yout plan of the anchors is proposed.The research shows that displacements of the unreinforced bedding stereo plasm slope under seismic action is present thestepped increases,and the rock blocks fall at the end of eart hquake.Displacements of reinfo rced slo pediminish significantly,andthe slope can remain stable in the earthquake.T he shear force response of the anchorelements shows good agreement with therelative displacement respo nse of the lay of terr ain ar ound the ancho r element,which means that the relative displacement of thelay of ter rain ar ound the anchor is the main stimulation factor of the ancho r reinfo rcement effects in the earthquake and the relative displacement of the lay of ter rain emerging on slope surface and at a lower elevation is larger so that the shear for ce of the corresponding anchoris larger.Hereby this paper put forward the reaso nable arrangement schemes of the anchor.

关 键 词：岩质边坡 结构面 离散元法 地震响应 锚杆 加固 

分 类 号：TU457[建筑科学—岩土工程]