| 摘要 |
PROBLEM TO BE SOLVED: To make the surface area and amount of soil, held by a grating crib, larger than those of the soil in a conventional structure; and to enable rapid and economical construction. SOLUTION: A mountain-side surface of a lateral frame of the grating crib is inclined to a mounting side with respect to a position at an angle of 90°with a slope. One end of a form, which forms a side surface of a longitudinal frame, is connected to a form which forms a part of the mountain-side surface of the lateral frame. A form, which forms a right side surface of the longitudinal frame, and a form, which forms a left side surface thereof, are connected together by means of a horizontal material. Concrete is sprayed along a vertical reinforcement and a horizontal reinforcement. COPYRIGHT: (C)2006,JPO&NCIPI
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