| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a construction method of an underground beam with excellent workability, capable of surely transmitting shear force on a horizontal placing joint surface and securing integration of underground beam concrete placed in advance and placed and joined concrete though it is the underground beam constructed by placing concrete on site. <P>SOLUTION: In the construction method of an underground beam, concrete of the underground beam is placed to a lower end of a floor slab, and thereafter, concrete is horizontally placed and joined to an upper end of the underground beam simultaneously with the floor slab. A pair of vertical partition plates 7 are set to a position at an upper part between side forms 6 of the underground beam and roughly equally dividing a beam inner dimension span length L into three, concrete 8 for the underground beam is placed to a prescribed level in a space between the side forms, a projected or recessed cotter 5a or 5b for horizontal placing joint positioned over the entire length in a beam width direction is formed at a beam center part, and the concrete is horizontally placed and joined thereafter. <P>COPYRIGHT: (C)2012,JPO&INPIT |
