挖入式港池泥沙淤积及减淤措施试验研究

通过试验,结合部分理论分析,研究了挖入式港池泥沙淤积特性,分析了产生淤积的原因,在此基础上提出3种减淤措施。试验结果表明:港池内泥沙淤积主要由回流及异重流引起,淤积物分布具有一定规律,回流产生的淤积集中在口门附近,粒径较粗,而由异重流引起的淤积在港池内沿程分布,粒径较细。提出的方案能够达到减淤的目的,可以用于实际工程。

Experimental Study on Sedimentation and Silt-Relieving Measures in Dig-in Basins

The characteristics of siltation and movement of sediment in dig-in basins and the causes of siltation were investigated and analyzed on the basis of model tests and with theoretical analysis and,on the basis of the investigations and analysis,three silt-relieving measures were proposed.The results of the model tests and the study show that siltation in the dig-in basins was mainly resulted from the reverse current and the density flow with a regular pattern of distribution of the deposited silts.The siltation resulted from the reverse current was centralized near the entrance of the basins with large particle size of deposit silts while the siltation caused by the density flow was distributed along the path of the flow with fine particles inside the basins.The silt relieving measures proposed can effectively cut down the siltation and be used in practical engineering projects.