| 摘要 |
<p>PURPOSE:To eliminate manufacture and removal of inner frame plates and reduce man-hours on site by a method wherein stays and lines supported by them are built in a steel structure beforehand and concrete is placed to construct an underground concrete structure. CONSTITUTION:Lines 4 are attached to stays 3 which support the lines 4 by welding or the like. As the stays 3 and the lines 4 are built in a steel structure 7 beforehand, the steel structure 7 is manufactured in a factory or the like. The steel structure 7 manufactured like this is placed in an underground hole in which the structure 7 is to be installed with outer frame plates 5 between and then concrete is placed between the outer frame plates 5 and the steel structure 7 to construct an underground concrete structure 1 and the construction is finished.</p> |
