环向盲管间距对隧道排水影响及设计分析  

Influence of distance between circumferential blind pipes on tunnel drainage and design analysis

作　　者：安鹏涛 杨世卫 傅鹤林[3] AN Pengtao;YANG Shiwei;FU Helin(School of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,Guangxi University,Nanning 530004,China;School of Civil Engineering,Central South University,Changsha 410000,China)

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]广西大学特色金属材料与组合结构全寿命安全国家重点实验室,广西南宁530004 [3]中南大学土木工程学院,湖南长沙410000

出　　处：《华中科技大学学报（自然科学版）》2024年第9期127-132,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51978668);广东省交通运输厅课题资助项目(DFH(201904)YS1-001);广西科技基地和人才专项(AD23026104)。

摘　　要：环向盲管间距制约排水系统工作性能,影响隧道支护结构承担水压力,设计不当极易造成运营期隧道工程渗漏水.为解决该问题,构建了含环向盲管间距参数的隧道排水系统精细化计算模型,基于复变函数、保角变换、达西定律及流体质量守恒定律推导了隧道渗水量及支护结构外水压力计算式,通过与已有隧道排水系统设计理论及现场监测数据对比,验证了本文计算方法的有效性及合理性.在此基础上,揭示了渗水压力沿隧道走向的分布规律,探讨了隧道排水系统工作机制.研究表明:隧道涌水量随环向盲管间距的增加而非线性减少,随环向盲管位置水头的增大而近似线性减小;隧道涌水量随土工布厚度的增加而非线性增大,当土工布厚度超过一定值后,其对隧道涌水量的影响可忽略;环向盲管位置结构承担水压力最小,支护结构承担水压力沿隧道走向呈抛物线形式分布,忽视支护结构承担水压力沿隧道走向的差异性可能导致计算结果失真.The spacing of circumferential blind pipes restricts the working performance of the drainage system and affects the water pressure borne by the tunnel support structure.Improper design will easily lead to water leakage during the operation period of the tunnel project.In order to solve this problem,a refined calculation model of tunnel drainage system with circumferential blind pipe spacing parameters was constructed.Based on the complex variable function,conformal transformation,Darcy's law and the law of conservation of fluid mass,the calculation formula of tunnel seepage and external water pressure of the support structure was derived.The effectiveness and rationality of the calculation method in this paper were verified by comparing with the existing tunnel drainage system design theory and field monitoring data.On this basis,the distribution law of seepage pressure along the tunnel direction was revealed,and the working mechanism of tunnel drainage system was discussed.The results show that the tunnel water inflow decreases nonlinearly with the increase of the distance between the circumferential blind pipes,and approximately linearly with the increase of the head at the circumferential blind pipe position.The tunnel water inflow increases nonlinearly with the increase of geotextile thickness.When the geotextile thickness exceeds a certain value,its impact on the tunnel water inflow can be ignored.The water pressure borne by the structure at the location of the circumferential blind pipe is the smallest,and the water pressure borne by the support structure is distributed in parabola along the tunnel direction.Ignoring the difference of the water pressure borne by the support structure along the tunnel direction may lead to the distortion of the calculation results.

关 键 词：隧道工程 排水系统 保角变换 涌水量 盲管间距 

分 类 号：TU473[建筑科学—结构工程]