一、概述大江冲砂闸的任务是泄洪、拉砂和控制三江和大江上游航道进口处的流速,当二江泄水闸检修时,水从大江冲砂闸下泄。工程布置见附图。护坦结构:一级池内采用封闭排水型式;二级池采用暗排水型式;护固段采用明排水型式。 I. Overview The task of Oki flushing sluices is discharging flood, pulling sand and controlling the flow rate at the inlet of the upper reaches of Sanjiang and Dajiang rivers. When the Erjiang floodgate is overhauled, water escapes from the Dajiang flushing sluice. Project layout see attached map. Conservator structure: a pool of closed drainage type; secondary pool with dark drainage type; retaining section with clear drainage type.