关于提高耙吸船储砂坑利用率的分析研究

Analysis and research on improving the utilization ratio of sand storage pit of trailing suction hopper dredger

为充分利用有限的储砂坑容,缓解由此带来的工程困难,根据厦门东碇岛取砂区沙质的分析,结合耙吸挖泥船新海龙泥舱尺寸、海浪潮流参数及设计备砂水深等因素确定耙吸船抛砂时的扩散系数,进而确定水下抛砂堆积模型,根据堆积模型尺寸调整抛砂坑尺寸大小。通过把试验段划分2个区域进行平整度对比分析,坑容利用率有显著提高,对后续7号储砂坑、8号储砂坑相应的工程实施具有指导性意义,保证现有坑容条件下为厦门新机场保护带施工便道备砂充裕。

In order to make full use of the limited capacity of sand storage pit and alleviate the engineering difficulties,according to the analysis of sand quality in Xiamen Dongdian Island sand area,and combining the size of mud tank of the trailing suction hopper dredger Xinhailong,wave and tidal current parameters and the design depth of sand preparation to determine the diffusion coefficient of trailing suction hopper dredger during sand throwing,and then the underwater sand throwing accumulation model was determined,and the size of the sand throwing pit was adjusted according to the size of accumulation model.By dividing the test section into two areas for comparative analysis of flatness,the utilization rate of pit capacity has been significantly improved,which has guiding significance for the subsequent engineering implementation of the No.7 sand storage pit and No.8 sand storage pit,so as to ensure sufficient sand preparation for the construction road of Xiamen New Airport Protection Zone under the existing pit capacity conditions.