| 摘要 |
<p>PROBLEM TO BE SOLVED: To construct a side ditch doubling as a free gradient, by post-casting adjustment concrete as necessary in a bottomed side ditch.SOLUTION: Adjustment height is set by a frame ruler that is precedently braced and fixed throughout the length of an inner bottom of each bottomed side ditch by a turn buckle; gradient surface shaping work for post-cast adjustment concrete is facilitated; and restraint bond strength is also stably increased.</p> |
