水平层状围岩离层机理研究  

Research on the Separation Mechanism of Horizontal Layered Surrounding Rock

作　　者：常二鹏 何珅鋆 黄懿 黄学智 CHANG Erpeng;HE Shenyun;HUANG Yi;HUANG Xuezhi(The Fifth Construction Co.,Ltd.of China Tiesiju Civil Engineering Group,Jiujiang,Jiangxi Province,332000 China;Guangxi Communication Design Group Co.,Ltd.,Nanning,Guangxi Zhuang Autonomous Region,530000 China)

机构地区：[1]中铁四局集团第五工程有限公司,江西九江332000 [2]广西交通设计集团有限公司,广西南宁530000

出　　处：《科技资讯》2024年第9期127-129,共3页Science & Technology Information

摘　　要：以南宁市东风路水平层状岩体隧道为背景,通过理论分析,研究了水平层状围岩的离层特征,分析了离层产生的条件。研究结果表明:水平层状围岩的变形是由水平应力导致的,水平应力引发岩层结构变形,最终导致围岩产生离层。相邻岩层非同步、非协调结构变形是离层产生的本质表现;水平层状围岩的离层可分为协调变形阶段、离层产生前的临界阶段、离层产生与发展阶段;从力学条件上看,离层的产生与发展仅与水平应力和岩层自重有关;用薄板理论分析了考虑岩层自重和水平应力条件下的层状围岩离层条件。Taking the tunnel of horizontal layered rock in the Dongfeng Road in Nanning City as the background,this paper studies the separation characteristics of horizontal layered surrounding rock by theoretical analysis,and analyzes the formation conditions of separation.Research results show that the deformation of horizontal layered surrounding rock is caused by the horizontal stress,which causes the deformation of the rock structure and eventually leads to the formation of the separation of surrounding rock.The non-synchronous and non-coordinated structural deformation of adjacent rock strata is the essential manifestation of the formation of separation,the separation of horizontal layered surrounding rock can be divided into the coordinated deformation stage,the critical stage before the formation of separation and the formation and development stage of separation,and the formation and development of separation are only related to the horizontal stress and the self-weight of rock strata from the perspective of mechanical conditions.The separation conditions of layered surrounding rock under the condition of considering the self-weight of rock strata and the horizontal stress are analyzed by the plate theory.

关 键 词：水平层状围岩 离层机理 离层条件 薄板理论 

分 类 号：U455.6[建筑科学—桥梁与隧道工程]