Study On Multi-arch Tunnel's Ground Water Seepage Filed And Leakage-resistance And Disposal

Multi-arch tunnel is a kind of special structure of highway tunnel in express highway construction in mountain area. Through the survey of tunnels which have already been finished and which have still under construction, it shows that leakage of multi-arch tunnel is outstanding problems in design, construction and service of multi-arch tunnel. Leakage of multi-arch tunnel makes the road wet and slip. It can cause the traffic accidents;Leakage of multi-arch tunnel increases the tunnel humidity and decreases the wind engines and lights working efficiency;Leakage of multi-arch tunnel may deteriorate the tunnel's working environment by arousing some freezing disasters in the cold areas. Leakage-resistance and disposal has been a key problem in the tunnel construction.Multi-arch tunnel's leakage-resistance and disposal technology is a marginal science which combines architectural technology and chemical technology. There are many problems waiting for researching and discussing. Besides the instance of the construction practice, there are many theory problems need to be solved, especially we lack of the real research results about the leakage-resistance and disposal at present. All in all, multi-arch tunnel's leakage-resistance and disposal is not a mature technology for designing and construction. Multi-arch tunnel's leakage-resistance and disposal constructions which have been finished all base on the present criterion and use the foreignmature technologies. But the effects are not ideality. It needs more systemic and all-around reaching.The author Simulates and calculates the distributing character of Jiuhua large span multi-arch tunnel's ground water 3-D seepage filed bases on the rule of ground water and the theory of hydraulic seepage. It combines the characters of the multi-arch tunnel wall rock's structural surface and the investigations of the leakage water. By this way, the author concludes the characters of the multi-arch tunnel's leakage water, analysis the reasons why the tunnel's water leaked, researches the consistency of the tunnel' leakage water and wall rock's over break, probes into the design and treatment technology of the tunnel's leakage-resistance and disposal, brings up some treatment advices of tunnel's leakage water, and gets some useful conclusions.