跌水与急流槽施工要点
Construction points of water drop and chute
1)跌水与急流槽宜用浆砌圬工结构；跌水的台阶高度应按设计或根据地形、地质等条件确定；多级台阶的各级高度可以不同，其高度与长度之比应与原地面坡度相适应，台阶高度应不大于 0.6m，不同台阶坡面应上下对齐。
1) The drop and chute should be made of mortar masonry structure; the step height of water drop should be determined according to the design or terrain, geology and other conditions; the height of multi-stage steps can be different, the ratio of height to length should be adapted to the original ground slope, the height of step should not be greater than 0.6m, and the slope surface of different terrace should be aligned up and down.
2)跌水可用浆砌片石或水泥混凝土浇筑。沟槽、壁及消力池的边墙厚度：浆砌片石为 0.25~0.4m，混凝土为 0.2m，高度应高出计算水位至少 0.2m，槽底厚度为 0.25~0.4m，出口应设置隔水墙。
2) Water drop can be poured with mortar rubble or cement concrete. The thickness of side wall of trench, wall and stilling basin: mortar rubble is 0.25 ~ 0.4 m, concrete is 0.2 m, the height should be at least 0.2 M higher than the calculated water level, the thickness of groove bottom is 0.25 ~ 0.4 m, and the outlet should be set with water barrier.
3)跌水应按设计要求设施工消力槛。
3) The construction stilling sill shall be set according to the design requirements.
4)跌水槽一般筑成矩形，但跌水高度不宜过大，槽底纵坡应较缓，也可采用梯形断面。梯形跌水槽身应在台阶前 0.5~1.0m 和台阶后 1.0~1.5m 范围内加固。
4) The drop trough is generally built into a rectangle, but the height of the drop should not be too large, and the longitudinal slope at the bottom of the trough should be gentle, and the trapezoidal section can also be used. The trapezoidal chute body should be reinforced in the range of 0.5 ~ 1.0m in front of the steps and 1.0 ~ 1.5m behind the steps.
5)急流槽的纵坡，一般不宜超过 1：1.5，可用浆砌片(块)石砌筑或混凝土浇筑。
5) Generally, the longitudinal slope of the chute should not exceed 1:1.5, which can be built with mortar rubble or concrete.
6)急流槽的基础应嵌入地面以下，其底部应按设计要求砌筑抗滑平台，并设置端护墙。
6) The foundation of the chute shall be embedded below the ground, and the anti sliding platform shall be built at the bottom according to the design requirements, and the end protection wall shall be set.
7)进水槽和出水槽底部应采用片石铺砌。水泥浆勾缝长度一般不应小于 10m；特殊情况下，应在下游铺
7) The bottom of inlet and outlet channels shall be paved with rubble. The joint length of cement slurry shall not be less than 10m in general; under special circumstances, it shall be laid in the downstream
设厚 0.2~0.5m、长 2.5m 的防冲铺砌。
Anti scour pavement with thickness of 0.2 ~ 0.5m and length of 2.5m is set.
8)长急流槽应分段砌筑。每段长宜控制在 5~10m，接头处以防水材料填缝，应密实无空隙。
8) The long chute should be built in sections. The length of each section should be controlled within 5 ~ 10 m, and the joint should be filled with waterproof material, and should be dense without gaps