Abstract
In Japan, K yoto City has constructed four subway tunnels that run closely each other. Problems accompanying the closely running tunnels are studied during the planning and design stages prior to construction. A variety of monitoring during the construction stage resulted in the collection of numerous data including the load transmission between tunnels and characteristic behavior of theground during the construction of four tunnels. Aiming at improving the method for the evaluation of the interaction of closely running tunnels, this study attempted to analyze and assess the behavior of the tunnels and the surrounding ground through such data obtained from the above project. This paper describes the characteristics of influence from the thrust of a succeeding tunnel to a preceding tunnel and the analytical expression of the mechanism of ground behavior during the construction of closely running tunnels.
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