The Research And Application Of The New-type Bapanling Tunnel's Waterproofing And Drainage System On Benxi-huanren Route

The technology of mountain tunnel's waterproofing and drainage involves such factors as design, materials and construction. Although the scholars at home and abroad have made great efforts to achieve some positive results, there have still been some water seepage problems in the domestic tunnels built in the past years because of lack of impeccable design and construction measures. This thesis studies the technology of vehicular tunnel's waterproofing and drainage on mountains based on the project of Bapanling Tunnel between Benxi and Huanren.The thesis summarizes some major problems of tunnel waterproofing technology according to the investigation and analysis of domestic and overseas vehicular tunnel's waterproofing and drainage technology and its development. Based on the analysis and study of existence condition and regularities of distribution of underground water in the tunnel in a variety of aquifer media, it has been better known how the underground water influences tunnel structure, that is, how its mechanism of action works. The thesis elaborates the technology and conditions of usages of mountain tunnel's waterproofing and drainage, which puts forward the drainage system of double drainage layers and double waterproof layers, based on the special geology and hydrogeologic conditions of the newly-built Bapanling Tunnel. Meanwhile, this system employs such new materials as EVA waterproofing and drainage boards, SPJ water seals and the new technology of nail-less installment of waterproofing and drainage boards. This thesis also studies the implementation and examination of this system and makes a summary in order to offer the basis to the successful application and promotion of the new system.