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http://dx.doi.org/10.9711/KTAJ.2018.20.6.1073

Development of optimal cross-section design methods for bored utility tunnels: case study of overseas typical cross-sections and design criteria  

Park, Kwang-Joon (Daejung Consultant Co., Ltd.)
Yun, Kyoung-Yeol (Daejung Consultant Co., Ltd.)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.20, no.6, 2018 , pp. 1073-1090 More about this Journal
Abstract
Since the domestic utility tunnels were built mainly in the development project of the new city, they are all in the form of cut-and-cover box tunnel. But, in the case of overseas construction of utility tunnels for existing urban areas, the bored tunnel types are mainly adopted. It is reasonable to install bored tunnels in a downtown area because it is difficult to block the roads or install bypass roads due to heavy traffic and civil complaints. In order to activate the utility tunnels in bored type, it is necessary to secure optimized cross-sectional design technology considering the optimal supplying capacity and mutual influencing factors (Thermal Interference, electrolytic corrosion, efficiency of the maintenance, etc.) of utilities (power cables, telecommunication cables, water pipes, etc.). The optimal cross-section design method for bored utility tunnels is ultimately to derive the optimal arrangement technique for the utilities. In order to develop the design methods, firstly, the cases of tunnel cross-section (Shield TBM, Conventional Tunneling) in overseas shall be investigated to analyze the characteristics of the installation of utilities in the section and installation of auxiliary facilities, It is necessary to sort out and analyze the criteria related to the inner cross-section design (arrangement) presented in the standards and guidelines.
Keywords
Bored utility tunnel; Cut-and-cover box tunnel; Optimal cross-section; Utilities; Shield TBM;
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