塔尔郎渠首水工模型试验研究

渠首各建筑物位置设计时,要综合考虑泄洪、排沙、引水三者之间的制约关系。在满足引水条件下,尽量避免泥沙进入引水渠道;防止闸前、后出现冲淤现象。解决好上述问题的关键,是合理确定各建筑物的高程及相互之间的平面位置。为了验证塔尔郎渠首工程各建筑物的相对位置是否满足设计要求,进行了模型试验。成果表明:渠首引水闸底板高程偏低,闸室进沙量较大;渠首泄洪排沙闸在校核流量下,闸墩及闸门顶高程偏低;泄洪槽末端出口处的冲坑深度大于设计值。因此,对引水闸进口底板及平面结构进行了调整。经两次优化后,渠首工程引水防沙满足设计要求。为了减少泄洪排沙闸及泄洪槽的淤积,提升引水质量,提出了各种工况下的闸前壅水运行调度方案。

Model Tests of Head Works Water Project in Tal Lang Channel

During the head work design process the relationships between the flood discharge ,sediment ,drinking water should be carefully considered .Under the conditions of water diversion ,it should avoid mud enter into the channel .The key to solve this problem is to determine the height of each building and the plan position .In this paper the model was tested to verify the projects positions in the plan .The results show that the height of the bottom of the sluice gate was on the low side which could result in a large amount of sand in the chamber ;headworks sluice flood discharge sand's height of the gate and gate was low under check flow ;and at the end of the flood discharge trough at the outlet of the scour depth is greater than the design value .So ,the inlet bottom plate and the plane structure of the diversion gate was adjust-ed .After two optimization water diversion and sand control could meet the design requirements .In order to reduce flood discharge sluice and spillway trough silt sand and improve pilotage quality ,the scheduling scheme is proposed under vari-ous conditions of gate backwater before operation .