| 摘要 |
An underwater tunnel (A) is comprised of: a foundation body (1) moored to the bottom (B) of the water; a support frame (2) erected on the foundation body (1); and a tunnel body (3) formed integrally with the support frame (2); wherein the tunnel body (3) is formed in a two-layer construction which consists of an outer shell (30) and an inner shell (31) so that spaces (R1, R2) formed inside the inner shell (31) and between the outer and inner shells (30, 31) can be used for desired purposes, and the support frame (2) is so formed that its vertical cross section is virtually a regular triangle and that a water tank (T) is formed at the inside bottom of the support frame (2). The underwater mooring apparatus (4) for holding the underwater tunnel (A) in place in the water consists of: a tension cable means (40) whose one end is secured to an anchor (U) and the other end is attached with a rotatable pulley (41); and a plurality of connecting wire means (43) wound around the pulley (41) attached to the tension cable means (40), the both ends of the connecting wire means (43) being fixed to the structure (A) to be moored; wherein one of the connecting wire means (43a1) is normally under tension connecting the structure (A) to be moored and the tension cable means (40) and the remaining connecting wire means (43a2, 43a3) are normally set in a loosened state so that when the first tensed connecting wire means (43a1) is broken, the remaining loosened connecting wire means (43a2, 43a2) can take over to hold the structure (A) in place. <IMAGE> |
