| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a steep-slope supporting cover device for an underground structure, which can suppress or reduce the amount of biting of a cover body by hardly deforming a receiving frame. <P>SOLUTION: This steep-slope supporting cover device for the underground structure has a constitution in which the cover body is received and supported in the receiving frame by surface contact between an outer peripheral surface of the cover body and an inner peripheral surface of the receiving frame, both composed of a slope. The slope of the outer peripheral surface 14 of the cover body 11 and that of the inner peripheral surface 16 of the receiving frame 12 are slopes which have shapes of vertical sections composed of a straight line; only a lower portion of the slope of the outer peripheral surface 14 of the cover body and that of the slope of the inner peripheral surface 16 of the receiving frame are brought into surface contact with each other; contact portions 20, both of which are composed of a slope, are set at portions for surface contact in the lower portion of the outer peripheral surface 14 of the cover body or that of the inner peripheral surface 16 of the receiving frame; and a noncontact portion 21 depressed with respect to the contact portion is formed in the upper portion of the outer peripheral surface of the cover body or that of the inner peripheral surface of the receiving frame. <P>COPYRIGHT: (C)2010,JPO&INPIT |
