合理确定泵站规模一直是感潮河道排涝工程设计中的关键问题。通过建立物理模型,在选定的水文边界条件和相应工程运行要求下,对某感潮水系两座涌口泵站规模进行试验研究。试验发现,受限于河涌过流能力,泵站规模存在临界值,超过该值后,即使再进一步增加泵站规模,水位也不会继续下降;泵站抽排对某位置水位的降低效应与泵站和该位置之间的距离密切相关,距离越近,水位降低越明显。基于上述认识,通过试验确定了满足水位管控要求的两座泵站规模的合理组合:距离相对较远的温涌泵站为80 m3/s,较近的金紫涌泵站为130 m3/s。试验方法和主要成果可为工程方案比选及优化提供重要依据,对类似河涌整治工程也具有一定的借鉴意义。
Abstract
Determining the optimal scale of pump station is a crucial aspect of designing drainage systems in tidal rivers.We constructed a physical model of a tidal river system and conducted experimental investigations on the scales of two pump stations situated at the outlets under selected hydrological boundary conditions and project operational requirements.Our study reveals that:(a) constrained by the river's discharge capacity, a critical scale exists for the pump station, beyond which the water level remains unaffected by further scale increments;(b) the extent of water level reduction due to drainage pumping correlates closely with the proximity of the pump station, with greater proximity resulting in more pronounced water level drops. Building upon these insights and conducting multiple trials, we propose an optimal scale combination for the two pump stations to meet design specifications:80 m3/s for the Wenchong Pump Station situated farther away, and 130 m3/s for the closer Jinzichong Pump Station. This research offers valuable data for optimizing design processes and serves as a reference for similar projects.
关键词
感潮河道 /
排涝泵站规模 /
物理模型试验 /
水位 /
整治工程
Key words
tidal river /
scale of drainage pump station /
physical model test /
water level /
rehabilitation project
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