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根据设计水流条件和抢险大土包的几何、材料特性 ,分析了大土包沉降过程与偏移机理 ,并对大土包进行了力学分析与动力学过程的研究 ,通过合理简化 ,导出了大土包横向偏移的计算公式。根据水槽概化试验的观测资料 ,确定了沉降计算的有关参数 ,建立了大土包沉降的计算数学模型。针对黄河一般的堵口水流特点及现实施工条件进行了多种情况下大土包抛掷沉降的模拟计算 ,给出了大土包横向偏移与大河流速、水深以及断堤头坡度间的相关关系
According to the design flow conditions and the geometry and material characteristics of the big loam, the settlement process and migration mechanism of the loam are analyzed, and the mechanics analysis and dynamic process of the loam are studied. By reasonably simplifying, Calculation formula of soil bag lateral offset. According to the observational data of generalized test of sink, the relevant parameters of settlement calculation are confirmed, and the mathematical model of settlement of large soil bag is established. According to the characteristics of the general flow and the actual construction conditions of the Yellow River, the simulation and calculation of throwing and settlement of large earth bales under various conditions are carried out. The correlation between the lateral displacement of large earth bales and the flow velocity, water depth and the slope of the head is given.