Study On Highway Tunnel Water Leakage Mechanisms And Countermeasures

Since the reform and opening up,as China’s transportation enterprise vigorous development,construction of highway tunnels also achieved remarkable achievements.However,in the case of China Road tunnels seepage water during the operation is widespread.Taking a freeway tunnel seepage water disease investigation and governance engineering background,first of all anti-drainage system as a starting point to analyze the causes of leakage of water occurs,through Investigation and Analysis on and model test analysis of the actual performance of the tunnel waterproofing and drainage systems;Based on the principle of fluid-structure interaction,using the finite difference software FLAC3D study the mechanism of the structure of the tunnel bottom leakage of water occurred;Optimization measures proposed on the basis of research of the mechanism of water seepage tunnel on the occurrence of disease,and were studied by backing new technologies and drainage;Finally to the high-speed tunnel water leakage instance,a comprehensive analysis of its pathogenesis seepage water,Study the seepage water used and the effectiveness of the new measures Treatment. The main research results obtained in this paper are:(1) Through the literature Investigation and site survey,researc h and analysis and summarizes the various problems of highway tu nnel waterproofing and drainage systems of which exist in the cons truction, these problems are possible factors in disease occurrence o f water leakage.(2) Through Laboratory model test investigation found geotext ile by rock pressure,initial support surface roughness and the degree of clogging of the three factors and failed to play its practical eff ectiveness;After covering the central gutter graded gravel sediment i s clogging their ability to seriously reduce flooding.(3) Research using FLAC3D Bottom of Tunnel structure hydr odynamic pressure in the wheel loads response,analyze the impact Bottom of Tunnel in the form of the structure,porosity and vehicle three factors on the dynamic pore water pressure.(4) Using FLAC3D,the fluid-solid problem of tunnel bottom s tructure caused by the wheel load was researched,the effect of tunn el bottom structure,porosity and auto load on pore water pressure w as analysed the mechanism of tunnel bottom structure wreck and p avement permeability was revealed.(5) Taking a highway leakage in tunnels with water treatment project for the instance of disease,through the field investigation,de tection, comprehensive analysis of the reasons for its water leakage occurs,and proposed management measures and recommendations.