| 摘要 |
PURPOSE:To construct a drain path separately from slope frames by separating the drain from slope frames by a method in which a number of drains having an L-shaped cross section are constructed on a slope where slope frames are constructed slantly to the base line of the slope in such a way as to continue them to the lower end of the slope. CONSTITUTION:C-shaped light-weight steel slope frames 1 are constructed in a coursed masonry grill form, and L-shaped drain ditches 30 and drain ditches 31 of a slightly smaller cross section are formed in the slope A with soil 2 in the frames 1 by turning their interior angles toward the mountain side in such a way as to continue them from the upper end to the lower end of the slope A. L-shaped short water-collecting ditches 5 of smaller cross section than the ditches 30 are also set by connecting their ends to the ditches 30 in the direction of crossing the ditches 30. The upper edges 11 of the frames 1 are connected through to bottoms 32 of the ditches 30 with the bottoms of the ditches by screw nails 4 at places where the ditches 30 and 31 are crossed with the frames 1. The materials of the ditches can thus be freely selected and the time of construction can also be freely selected.
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