深埋斜井隧道衬砌外水压力折减系数研究
Research on Reduction Coefficients of Water Pressure on Outer Surfaces of Linings of Inclined Shaft Tunnels in Deep Embedment
刘彦文 1田威 2郭健2
作者信息
- 1. 中铁第五勘察设计院集团有限公司,北京 102600
- 2. 长安大学建筑工程学院,西安 710061
- 折叠
摘要
为研究衬砌外水压力对煤矿斜井隧道衬砌结构的影响,以穿越含水量大、富水性弱地层的斜井隧道工程为背景,通过分析地下水渗流过程中水力学特性、地层性质等因素引起的水头降低,得出衬砌外水压力折减系数的解析式.同时以该工程为依托,采用有限元模拟的方法评价和验证衬砌外水压力折减系数算式的合理性.在此基础上,探究了注浆圈半径、注浆圈渗透系数、隧道半径等三个工程可控因素对衬砌外水压力折减系数的影响.结果表明:注浆圈厚度的增大会明显降低衬砌外水压力折减系数,而注浆圈渗透系数及隧道半径的增大,会使得衬砌外水压力折减系数显著增大.
Abstract
To study the influence of water pressure on outer surfaces of lining structure of inclined shaft tun-nels in coal mines,taking an inclined shaft tunnel project across the rich water aquifer with a weak water yield property as the research object,the analytical formula for reduction factors of water pressure on outer surfaces of linings of tunnels was derived by analyzing water head reduction caused by hydromechanical characteristics and stratigraphic properties in processes of groundwater seepage.Simltaneoushy,based on the project,the rationality of the formula for reduction coefficients of water pressure was evaluated and veri-fied by finite element simulations.On the basis,the influence of three engineering controllable factors in-cluding radii of grouting rings,permeability coefficients of grouting rings and radii of tunnels on reduction coefficients of water pressure on outer surfaces of linings of tunnels was studied.The results showed that the increase in the thickness of grouting rings would significantly reduce reduction coefficients of water pressure on outer surfaces of linings,while the increase in the permeability coefficients of grouting rings and radii of tunnels would increase the reduction coefficients of water pressure on outer surfaces of linings significantly.
关键词
斜井隧道/衬砌结构/数值模拟/折减系数Key words
inclined shaft tunnel/lining structure/numerical simulation/reduction coefficient引用本文复制引用
基金项目
中铁第五勘察设计院集团有限公司科研课题(T5Y2021-B02)
陕西省自然科学基金(2021-JQ232)
出版年
2024
NETL
NSTL
万方数据