摘要
在特殊回填土中,为了研究开挖扰动影响下增设注浆加固墙体对偏压隧道边坡稳定性、围岩变形、塑性区分布、衬砌内力的影响,以重庆某浅埋偏压隧道为依托,采用交叉中隔墙法(cross diaphragm method,CRD)施工,运用Midas GTS/NX二维有限元软件进行数值分析。研究结果显示:考虑隧道开挖扰动影响时,如果未采取注浆加强措施,浅部隧道的地表最大垂直移动量会显著增大,并且可能出现向浅部隧道倾斜的发展倾向。而当加入注浆增强设施后,这种变化得到了有效遏制,地表最大垂直移动量的提升幅度大幅减小,从而使其保持在一个可控范围内,提高了安全性。
In special backfill soil,to study the influence of adding grouting-reinforced walls on the slope stability,surrounding rock deformation,plastic zone distribution,and lining internal force of biased tunnels under the influence of excavation disturbance,this study takes a shallow-buried biased tunnel in Chongqing as the research object.The cross diaphragm(CRD)method is adopted for construction,and Midas GTS/NX 2D finite element software is used for numerical analysis.The results show that when considering the influence of tunnel excavation disturbance,if no grouting reinforcement measures are taken,the maximum vertical movement of the ground surface of the shallow tunnel will increase significantly,and there may be a tendency to incline toward the shallow tunnel.However,after adding grouting reinforcement facilities,this change is effectively curbed,and the increase amplitude of the maximum vertical ground movement is greatly reduced,thus keeping it within a controllable range.
作者
陈光杨
Chen Guangyang(Sichuan College of Architectural Technology,Deyang,Sichuan 618000)
出处
《现代工程科技》
2025年第13期105-108,共4页
Modern Engineering Technology
关键词
偏压隧道
CRD法
数值分析
注浆加固墙体
biased tunnel
CRD method
numerical analysis
grouting-reinforced wall
