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首页> 外文会议>International Yellow River forum on ecological civilization and river ethics;2009 IYRF >Study on Jet Dredging Technology
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Study on Jet Dredging Technology

机译：喷射疏ging技术研究

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According to the Yellow River hydrology state, massive silt deposits in main watercourse of the reservoir. It is difficult for density current appears naturally because of low velocity. As a result, it seems necessary to agitate and transport the sediment on the reservoir bottom to the dam artificially, after which, the sediment before the dam will be brought to the downstream by high velocity flow occurred in the water regulation duration. As the depth of water is high and the silting-up rate is big in the Xiaolangdi reservoir, the cost on the equipment is quite high if using the common machinery dredging method, and the energy consumption is high. The jet dredging unit has the simple structure, reliable performance, high wearability, and can work freely without any limit on water depth. According to the internal and foreign engineering experience, the project of cleaning the silt on the bottom of Xiaolangdi reservoir is proposed. In the project, the bottom silt will be disturbed and sucked by the jet dredging unit and be discharged out of the reservoir to the downstreaM through the discharge hole of silt. According to design theory of jets flow, the simulation test installment has been designed and carried out. The experiment and the computed result indicate: a set of jet dredging system may suck silt 5 t/s, the biggest water depth it can work is 80 m, and its unit energy consumption is 0.156 kWh/t.
机译：根据黄河水文状况，水库主河道中沉积有大量淤泥。由于速度低，很难使密度电流自然出现。结果，似乎有必要将水库底部的泥沙人工搅动并运到大坝，此后，在水调节期间发生的高速流动将大坝前的泥沙带到下游。由于小浪底水库水深高，淤积率高，如果采用普通的机械疏method方法，设备成本很高，能耗高。喷射式挖泥船结构简单，性能可靠，耐磨性高，工作自由，对水深没有任何限制。根据国内外工程经验，提出了小浪底水库底部淤泥的清淤方案。在工程中，底部淤泥将被喷射疏unit装置扰动并吸走，并通过淤泥排泄孔从储层排到地下。根据射流设计理论，设计并进行了模拟试验装置。实验和计算结果表明：一套射流疏system系统可吸淤泥5吨/秒，最大工作水深为80 m，单位能耗为0.156千瓦时/吨。

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