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关于土坝砂砾地基混凝土防渗墙的结构分析问题,目前还沒有一个比较合理的计算方法.本文介绍了一个新方法,主要是考虑混凝土墙与砂砾地基的相互作用,根据两者位移相一致的条件来求解出作用于墙上的土压力。文中推导了有限深度地基在地表受到了土坝荷重和在內部受到水平集中力作用在地基內引起的水平位移公式,以及混凝土墙在外力作用下的变位方程,最后根据位移相协调的条件得出了适合于不同支承情况和计算情况的四种线性方程组,极易直接求解出土压力值.各方程组中的常数项也可方便地从曲线中查出.通过对某一工程实例的计算,认为过去防渗墙结构分析中采用土压力为某一已知分布的假定将导致很大的誤差,不宜继续采用。
There is no reasonable calculation method for the structural analysis of concrete cut-off walls in earth dam gravel foundations. A new method is introduced in this paper, which mainly considers the interaction between concrete walls and gravel foundations, and the displacements are consistent according to the two. Conditions to solve the earth pressure acting on the wall. This paper deduces the formula for the horizontal displacement of a finite-depth foundation subjected to earth load on the earth’s surface and horizontal concentrative force inside the foundation, and the displacement equation of the concrete wall under external forces. Finally, a condition based on the coordination of displacements is obtained. Four linear equation groups suitable for different bearing conditions and calculation conditions are available, and the earth pressure values can be easily solved directly. The constant terms in each equation group can also be easily found out from the curves. Through the calculation of an engineering example It is considered that the assumption that the earth pressure was used for a known distribution in the analysis of the impervious wall structure in the past would cause a large error and should not be continued.