Method for slitting drainage culvert and sabo dam having the drainage culvert

摘要

PROBLEM TO BE SOLVED: To obtain a method of slitting a drainage culvert capable of holding small gravel, earth and sand and debris in the drainage culvert without using a closing plate, and a sabo dam having the drainage culvert. [Solution] From the front surface FS of the dam body 110 to the predetermined depth of the lower surface of the drainage underdrain 120 at a predetermined angle from the steel material cutting hole embedding entrance position IPi in the front surface FS determined based on the separation Sep on the upper surface of the drainage underdrain 120. A plurality of steel material cutting holes 130i for burying the steel material, and steel materials 140i are inserted into these steel material cutting holes 130i to obtain a sabo dam having a slit structure in the drainage underdrain 120. [Selection diagram] Figure 1