浅埋偏压土层隧道施工安全性浅析  

Analysis on Construction Safety of Shallow Buried Biased Soil Tunnel

作　　者：李扬[1] 费维水[1] 陈光杨 汪伟伟 薛挥杰 费建文 LI Yang;FEI Weishui;CHEN Guangyang;WANG Weiwei;XUE Huijie;FEI Jianwen(Kunming University of Science and Technology,Kunming 650500)

机构地区：[1]昆明理工大学,昆明650000

出　　处：《工业安全与环保》2020年第9期39-43,共5页Industrial Safety and Environmental Protection

摘　　要：为了分析浅埋偏压小净距土层隧道的施工,运用数值模拟分析的方法,依托重庆某浅埋暗挖隧道,对施工时及施工后围岩的变形及应力、内部支撑的受力及衬砌内力的变化规律进行研究,以分析两种常用施工方法的可行性。研究结果表明:采用不同施工方法时,隧道围岩的变形及应力、隧道衬砌的内力均存在较大的差异,对于此特殊隧道来说,采用CRD法开挖才能有效地改善隧道偏压,减小围岩变形,有利于衬砌结构的受力。In order to analyze the construction of shallow buried partial pressure tunnel with small clear distance,this paper uses numerical simulation analysis method and relies on a shallow buried tunnel in Chongqing to study the deformation and stress of surrounding rock during and after construction,the stress of internal support and the change rule of lining internal force,so as to analyze the feasibility of two common construction methods.The results show that the deformation and stress of the surrounding rock and the internal force of the lining of the tunnel are greatly different when different construction methods are adopted.For this special tunnel,the CRD method can effectively improve the biased pressure of the tunnel,reduce the deformation of the surrounding rock and be beneficial to the stress of the lining structure.

关 键 词：浅埋偏压隧道 数值分析 台阶法 CRD法 围岩变形 衬砌内力 

分 类 号：U455[建筑科学—桥梁与隧道工程]