水闸与地基相互作用及底板的设计

Analysis on interaction between sluice and base and board design

传统的设计方法不能反映水闸的上部结构、底板和地基三者之间的相互作用.本文利用子结构法来模拟三者之间的相互作用;接触单元模拟底板和地基的相对错动、滑移;Mohr-Coulomb准则定义点的安全系数;剪应变脊线确定深层滑动线的位置,进而根据强度准则求解稳定系数.系统分析了上部结构、底板和地基刚度变化对地基的差异沉降和稳定性的影响,给出了相关曲线,提出了利用底板和地基刚度为函数的板土刚度比设计底板的新方法.

The interaction among the upper structure, the sluice board and the base cannot be considered by using traditional design methods. In the paper, the sub-structure method is used to calculate the interaction, contact element is employed to simulate the nonlinear behavior of interaction of sluice board and base, Mohr-Coulomb criterion is used to define the safe coefficient, and ridge of shear strain is used to find the slipping line, and then to calculate stability coefficient. The influence of stiffness of upper structure, sluice board and base is analyzed. Some valuable correlation curves have been put forward. A new design method for sluice board is finally proposed.