陕西水利Issue(2)：96-99,4.
黄土地层输水隧洞成洞条件影响分析
Analysis on the Influence of Tunnel Construction Conditions on Water Diversion Tunnel in Loess Strata
摘要
Abstract
Taking loess tunnel as the research object,the influence of the surrounding vertical displacement,horizontal displacement,vertical earth pressure,horizontal earth pressure and lining bending moment of the tunnel on the stability of the tunnel under different tunnel types,different cross-sectional sizes and different burial depths is analyzed.The results show that the circular tunnel has the best stress state.If the construction permits,the circular tunnel is safer and more reliable.With the increase of the excavation diameter,the stability of the tunnel will be adversely affected.On the basis of meeting the flow design,a smaller cross-sectional diameter should be adopted.With the increase of burial depth,the soil pressure and the internal force acting on the lining structure will be greater.Under the condition of large burial depth,the shield method should be preferred.The step method construction of the initial lining plays a role in controlling the deformation of the surrounding rock.When the tunnel section adopts a horseshoe or gate tunnel type,it is recommended to use the step method.With the strengthening of support measures,the convergence deformation of the soil and the stress of the lining are both decreasing.However,after the support is strengthened to a certain extent,the support effect is limited.Therefore,in actual construction,it is not recommended to take too strong support measures.If there are bad geology,landslides,roof falls,etc.,you can consider taking advanced support measures.关键词
黄土/输水隧洞/衬砌/稳定性/变形Key words
Loess/water tunnel/lining/stability/deformation分类
建筑与水利引用本文复制引用
田安安,李玉波,赵力..黄土地层输水隧洞成洞条件影响分析[J].陕西水利,2025,(2):96-99,4.基金项目
陕西省自然科学基金项目(2019JLP-22) （2019JLP-22）
