摘要
根据试验隧道的温度和水流量测试成果,得出了寒冷季节隧道水流量和隧道衬砌后浅层围岩温度随时间的变化规律。预防隧道冻害应有系统观念,一味提高隧道内温度或衬砌壁后温度未必有利于问题的解决。在试验隧道中采用了冻害综合防治措施,即:(1)加强拱顶围岩注浆;(2)选用低温柔性好的防水板;(3)喷射混凝土表面降糙;(4)采用LV法铺设防水层;(5)施工缝设置可排水止水带;(6)采用直接通至中央排水管的环向排水管并进行局部保温;(7)在衬砌下隅角背后设置保温层;(8)在衬砌壁后预埋电热带穿线管等,取得了良好的综合防冻效果。
Based on the measurement of temperature and water volumes of a testing tunnel,it was determined that the water volume and temperatures of the shallow rock mass behind the lined tunnel in a cold region changed over time,a problem which cannot be solved by increasing the temperature inside the tunnel or behind the lining.Comprehensive measures have been adopted and are addressed in this paper,which include： rock mass grouting at the tunnel crown,the application of a water-proof board that exhibits high flexibility at low temperatures,surface finishing of shotcrete,the laying of a water-proof layer using the LV method,using construction joints with drainable water stops,implementing toroidal drainpipes through to the central drain pipe and local heat preservation,installing an insulating layer behind the lower corner of the lining and the embedding of wire pipes.
出处
《现代隧道技术》
EI
北大核心
2012年第1期33-38,共6页
Modern Tunnelling Technology
基金
国家西部交通建设科技项目(项目编号:2007 318 812 67)
关键词
寒区隧道
温变规律
渗流规律
冻害预防
Cold region
Law of temperature variation
Seepage law
Frost damage prevention
