| 摘要 |
In order to establish temporary activity areas in or near larger cities it is proposed to make use of existing wet areas, on which platforms (2, 10) are established by means of a principally known technique for building light bridges, which are here mounted side by side so as to form a large floor. An associated large number of tubular bridge poles (38) ensure a high carrier capacity, and these poles are easy to mount by a direct flushing down, while, as an important matter, they are equally easy to dismount in being forced up by means of pressurized water or air. The mounting and demounting can be effected using simple auxiliaries, including a one man operated crane having guiding means for the poles (58, 60), and a high degree of stiffness in the construction is achieved by the use of individually tightened chain cross-struttings (44, 46) between the poles (38) of each pair or poles. The mounting can be effected with a low number of standard components and without help from the water side. |
