| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a construction method of a tunnel easily adjusting an error between a main tunnel and a branch tunnel in a width extended part and a joint part of the tunnel. <P>SOLUTION: In this construction method, the ground between linings 2 and 6 of the main tunnel 1 and the branch tunnel 5 to be excavated substantially in parallel is excavated to form a cavity part, then a connection segment 9 is arranged between lining segments 2 and 6 in upper parts of the main tunnel 1 and the branch tunnel 5, a connection segment 9 is arranged between lining segments 2 and 6 in lower parts of the main tunnel 2 and the branch tunnel 6, and a plurality of flat bars 71, 72 extended toward end parts of segments on the other side are provided in end parts of the lining segment 6 and the connection segment 9 and are buried into the concrete 20 while a plurality of flat bars 71, 72 provided on both of the segments 6, 9 are alternately arranged. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
