| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a construction method of a tunnel bottom structure provided with drainage equipment, allowing efficient construction at a low cost. <P>SOLUTION: A base concrete body 9 including a path bottom concrete part 6 configuring the bottom of a path 2 and a water storage tank bottom concrete part 8 configuring the bottom of a water storage tank 3 is integrally formed of cast-in-place concrete, and a plurality of precast concrete portal blocks 7,7... are connected in a tunnel axial direction on the path bottom concrete part 6 to construct the path 2. Then, a plurality of precast concrete blocks 20,20... in an inverse L shape comprising a planar top plate part 21 and a sidewall plate part 35 in the shape of being suspended downwards from one side edge of the top plate part 21 are arranged and connected in the tunnel axial direction in the state of being supported at the end part on the opposite side of the sidewall plate part of the top plate part 21 by the portal block 7 and erecting the sidewall plate part 35 on the water storage tank bottom concrete part 8 and thereafter, both end parts of the water storage tank 3 are closed by closing walls 25,25. <P>COPYRIGHT: (C)2012,JPO&INPIT |
