钢管-钢板桩围堰结构受力与变形计算

Calculation of stress and deformation of steel pipe steel sheet pile cofferdam structure

研究钢管-钢板桩围堰结构构件在实际受力状态下的入土深度、弯矩及变形,建立并求解基于增量法和全量法的弹性地基梁法挠曲微分方程,研究支撑道数、支撑竖向间距、钢板桩刚度、支撑预加力对围堰受力变形的影响。围堰的弯矩和位移随着支撑道数增加而下移,最大正弯矩主要出现在围堰的中下部;增加支撑道数、钢板刚度和支撑预加力可以改善围堰的受力与变形。

The depth of penetration,bending moment,and deformation of steel pipe steel sheet pile cofferdam structural components under actual stress conditions have been studied.The deflection differential equations of elastic foundation beams based on the total and incremental methods were established and solved.The effects of the number of support channels,vertical spacing of supports,stiffness of steel sheet piles,and pre added support forces on the stress deformation of the cofferdam were studied.The bending moment and displacement of the cofferdam decrease with the increase of the number of supporting channels,and the maximum positive bending moment mainly occurs in the middle and lower parts of the cofferdam;Increasing the number of support channels,steel plate stiffness,and pre applied support force can improve the stress and deformation of the cofferdam.