| 摘要 |
A construction method of a two-arch tunnel using a load distribution plate is provided to secure the stability of tunnel excavation by supporting with a load distribution plate and a steel supporter and to reduce a period of construction by executing the excavation and reinforcement for the main section and the center of a tunnel simultaneously. A construction method of a two-arch tunnel using a load distribution plate comprises the steps of: excavating the main section of a left tunnel and reinforcing the surrounding ground; excavating the center and reinforcing the ground; installing a load distribution plate and a steel supporter(40) to support the center; excavating the main section of a right tunnel and reinforcing the ground; installing a waterproof sheet and connecting with the load distribution plate; constructing side gutters of the footing and both sides of a middle bearing wall; connecting the load distribution plate, a horizontal drainpipe and a vertical drainpipe; forming a middle bearing wall(91) by dismantling oblique struts by stages and placing a steel supporter and lining at once; and placing pavement concrete and installing a barrier wall of the middle bearing wall.
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