| 摘要 |
A multiple arch tunnel having a barrier is provided to secure easiness of conveyance and to prevent the breaking of a central bearing wall by absorbing the impact caused by excavation using a barrier having air compartments. A multiple arch tunnel includes a central bearing wall(200) installed to the center of a pilot tunnel(100), primary and secondary main tunnels(110,120) formed on two sides of the central bearing wall, and barriers(300) installed on two sides of the central bearing wall to support the ceiling and the bottom of the main tunnels. The barrier comprises a body made with elastic materials such as rubber and attached with a fixing member to be fixed to the top of the central bearing wall, plural air compartments placed on the inside of the body successively to absorb impact, protective sheets made with shape memory alloys, coated on the inside of the air compartments and the outside of the body and attached with a protective film to prevent the deformation of the body against the impact caused at excavation, a rubber plate attached to the outside of the protective sheet and equipped with a knob made with elastic materials such as urethane, and an air injection unit installed to the body to connect with the air compartments.
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