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速流结构是公路泥石流防治体系中常用且有效的工程措施之一。文章基于底越式速流结构的受荷模式及边界条件,将汇流槽视为三次超静定梁,运用结构力学方法求解侧墙及嵌固桩的内力;将速流槽与嵌固桩引入Winkler模型,用弹性地基梁理论求解速流槽内力、位移及地基反力,由此提出底越式速流结构计算理论。以平川泥石流防治工程为例,进行内力计算。
Quick-flow structure is one of the commonly used and effective engineering measures in the prevention and control system of highway debris flow. Based on the load-bearing mode and boundary conditions of the bottom-flow type quick-flow structure, the article considers the confluence tank as the third-order statically indeterminate beam and applies the structural mechanics method to solve the internal forces of the side-wall and the embedded pile. Winkler model, the elastic foundation beam theory is used to solve the internal forces, displacements and foundation reaction forces in the launder, and the computational theory of the bottom-flow velocity structure is proposed. Take Pingchuan Debris Flow Prevention and Control Project as an example, calculate internal forces.