基于高效输沙实现技术的淤筑村台示范研究.

In the process of village platform construction in the lower Yellow River beach area, using the Yellow River sediment to build village platform can not only improve the flood carrying capacity of the Yellow River channel, utilize the Yellow River sediment resources, but also enable the beach area residents to avoid the flood disaster and improve the living and travel conditions of the beach area residents. In order to construct a high concentration and long-distance sediment transport channel, the multi-technology and high-efficiency sediment disposal demonstration project of “research on river channel and beach area treatment of the lower Yellow River” has been carried out. On the basis of previous studies, based on Zhang Hongwu’s hydraulics and river dynamics theory system, this paper calculated the critical velocity and resistance coefficient by using the sediment carrying capacity formula, the key technical parameters of the power system, slurry making system and pipeline system in the village platform construction through siltation and constructed a long-distance pipeline high-efficiency sediment transport meter to realize different coarse and fine sediment calculation methods. Combined with the engineering practice, the calculation results provide technical support for the design of equipment layout and other important links of the Yellow River pipeline high-efficiency sediment transport and silting construction project. The smoothly operation situation of the silted village platform project shows that the selected pipe diameter and sediment concentration are appropriate, which significantly improves the work efficiency and saves the project cost. A large number of measured data, such as hydraulic roughness and sediment concentration are quite close to the previous theoretical calculation results. Therefore, it can be shown in theory and engineering that for the coarse sediment in the Yellow River bed sediment can achieve the goal of long-distance accurate and efficient pipeline high concentration sediment transport and siltation. It can provide theoretical basis for efficient sediment transport and silting up the downstream beach area of the Yellow River and provide reliable technology for improving the wide beach river morphology of the Lower Yellow River. [ABSTRACT FROM AUTHOR]