贵州公路隧道洞内排水系统改进与应用实践  

Improvement and Application Practice of Drainage System inside Highway Tunnel of Guizhou Province

作　　者：苟德明[1] 吴铭芳[1] GOU Deming;WU Mingfang(Guizhou Transportation Planning Survey&Design Academy Co.,Ltd.,Guiyang 550082)

机构地区：[1]贵州省交通规划勘察设计研究院股份有限公司,贵阳550082

出　　处：《公路交通技术》2024年第4期59-66,75,共9页Technology of Highway and Transport

基　　金：贵州省重大科技专项项目(黔科合重大专项字[2018]3011)。

摘　　要：针对贵州早期建设的公路隧道洞内排水系统不合理,导致隧道排水不畅、渗漏水病害频发等问题,采用回顾分析方法,对不同时期贵州公路隧道的洞内排水系统特点进行了探讨和总结。结果表明:1)早期的“圆形中心排水沟+Ω形路侧边沟”排水系统中心水沟断面小,预制安装施工易出现接头错位、纵坡起伏等缺陷,Ω形路侧边沟易发生碾压破损;2)首次改进的“矩形中心排水沟+U形路侧边沟”排水系统加大了中心水沟断面,现浇施工能保证中心水沟断面和坡度顺直,改善了中心沟的排水能力,U形路侧边沟能避免被车轮碾压破损,但该排水系统仍存在横向排水路径较长、易发生淤堵、不便于检查维修及渗漏水病害处治等不足;3)再次改进的“三沟排水+梯形路侧边沟”排水系统缩短了横向排水路径,降低了横向导水管淤堵风险,增设的路侧排水暗沟能有效汇集围岩地下水,便于隧道渗漏水病害处治,更适合贵州地形地质复杂、降雨丰富、地下水易结晶等建设条件;4)在隧道排水系统改进和实践基础上,提出的可维护性排水系统设计构想增加了排水管和中心排水沟的可维护性,可为后续公路隧道的建设提供指导和借鉴。In response to poor drainage and frequent leakage of water caused by the unreasonable drainage system in the early construction of highway tunnels in Guizhou,a retrospective analysis method was adopted to explore and summarize the characteristics of the drainage system in Guizhou highway tunnels at different periods.The results showed that:1)The early“circular center drainage ditch andΩ-shaped roadside ditch”drainage system had a small cross-section of the central water ditch,and prefabricated installation construction was prone to defects such as joint misalignment and longitudinal slope undulation,Ω-shaped roadside ditches were prone to rolling damage.2)The first improved“rectangular central drainage ditch and U-shaped roadside ditch”drainage system had increased the cross-section of the central drainage ditch.The cast-in-place construction could ensure that the cross-section and slope of the central drainage ditch were straight,which improved the drainage capacity of the central drainage ditch.The U-shaped roadside ditch could avoid being crushed and damaged by the wheels.But the drainage system still had shortcomings such as long horizontal drainage paths,easy blockage,lack of inspection and maintenance,and treatment of water leakage diseases.3)The second improved“three ditch drainage and trapezoidal roadside ditch”drainage system had shortened the horizontal drainage path and reduced the risk of blockage of the horizontal water guide pipe.The added roadside drainage ditches could effectively collect groundwater of surrounding rock,which facilitated the treatment of tunnel leakage water diseases.This drainage system was more suitable for construction conditions such as complex terrain and geology,abundant rainfall,and easy crystallization of groundwater in Guizhou.4)Based on the improvement and practice of tunnel drainage system,the proposed maintainability drainage system design concept has increased the maintainability of drainage pipes and central drainage ditch,which can provide guidance and

关 键 词：公路隧道 排水系统 改进与应用 可维护性 

分 类 号：U453.6[建筑科学—桥梁与隧道工程]