摘要
为解决岩溶地区引水隧洞安全稳定问题,采取“堵、排”结合设计原则,在减少衬砌外水压力同时避免地下水位过度降低从而影响隧洞周边水环境。利用解析法推导衬砌排水量和衬砌背后外水压力之间的关系,并采取数值计算的方式计算,得出以下结论:(1)推导出岩溶地区隧洞衬砌背后水压力函数关系式;(2)推导出排水减压阀出水口流速关系式;(3)推导出排水量与衬砌背后水压力之间关系式;(4)不同渗透系数下,隧道施工和运营期地下水位变化规律。
In order to solve the safety and stability of tunnel in karst area,the design principle of"blocking and drainage"is adopted to reduce the external water pressure of lining and avoid excessive lowering of groundwater level.In this paper,the relationship between the displacement of the lining and the external water pressure behind the lining is deduced by using the analytical method,and the numerical calculation method is adopted to calculate and compare with them.The following conclusions are drawn:(1)the functional formula of the water pressure behind the lining in karst area is derived;(2)the relationship of the flow velocity at the outlet of the drainage pressure reducing valve is derived;(3)the relationship between the discharge and the water pressure behind the lining is calculated In this paper;(4)under different permeability coefficients,the groundwater level changes during tunnel construction and operation.
作者
姚军
孙爱琴
YAO Jun;SUN Aiqin(School of Urban Construction and Transportation,Hefei University,Hefei 230601,China)
出处
《佳木斯大学学报（自然科学版）》
CAS
2021年第3期14-17,57,共5页
Journal of Jiamusi University：Natural Science Edition
基金
安徽省高等学校自然科学研究项目重点项目(KJ2019A0822)安徽省高校优秀青年人才支持项目(gxyq2020067)合肥学院自然科学基金重大项目(18ZR02ZDA)。
关键词
岩溶地质
衬砌背后水压力
隧洞排水设备
理论解析
数值计算
karst geological
water pressure of lining behind
tunnel drainage equipment
theoretical analysis
numerical calculation
