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汛中,是可能发生洪水的高峰时期。这时,大部分水库超蓄。为确保水库安全,首先考虑到的就是泄洪,但大多数水库泄洪的方式都趋于一致,那就是一孔能泄的不开两孔、两孔能泄的不开三孔的泄洪形式。这样,虽然少开了闸门,减少启闭麻烦,给管理带来了方便,但会产生下列的几种弊病: 1.在泄量一定的情况下,少孔泄流增加了泄洪孔的单宽流量,加大了流速,容易产生突涌式水跃,造成闸下消能困难,甚至破坏消能工。 2.少孔泄流,很难消除过闸水流的多余能量,促
In the flood season, it is a peak period where floods may occur. At this time, most of the reservoir super savings. In order to ensure the safety of reservoirs, flood discharge is the first consideration. However, most reservoirs are converging in flood discharge methods. That is to say, a single orifice can discharge without opening two holes and two holes can discharge without opening three holes. In this way, although less open the gate to reduce the opening and closing trouble, to bring management convenience, but will produce the following several drawbacks: 1. In the case of a certain amount of discharge, the small hole discharge increases the single width of flood discharge hole Flow, increased flow rate, prone to sudden surge jump, resulting in floodgate dysfunction, or even destroy the energy dissipater. 2. Perforated discharge, it is difficult to eliminate excess energy flow across the gate, and promote