旋流池半地下连续墙筒形结构内力变形分析

Internal Force and Deformation Characteristics of a Circular no-embeded Diaphragm Wall of Swirling Pool

摘要:

本文基于弹性薄板理论，推导出旋流池开挖过程中一种新的围护结构－半地下连续墙在侧向水土荷载作用下的变形和内力方程。根据理论公式，系统地分析了端部自由和端部固定两种边界条件下旋流池半地下连续墙筒形结构的变形和内力特点，并分析了各参数（包括筒壁厚度、直径、高度和模量）对其内力和变形的影响。研究结果表明，旋流池半地下连续墙围护结构在侧向水土荷载作用下的内力主要以环向压力为主，弯矩和剪力值除在端部较大外，其余位置都较小；当端部固定时，最大变形值出现在中部靠下的位置，变形值总体上较小；在各种影响因素中，旋流池半径对筒壁的内力和变形影响最大。文中还对旋流池半地下连续墙筒形围护结构的设计计算提出了建议。

Abstract:

Based on the theory of elastic thin plate, the internal force and deformation of a special retaining structure-circular no-embeded diaphragm under lateral soil and water pressure during excavation of circular swirling pool were studied. The characteristics of internal force and deformation of the circular diaphragm wall structure with two kinds of different boundary conditions at bottom -free or fixed were analyzed. The influence of wall thickness, radius, height and elastic module on its internal force and deformation were also studied. Results show that, under lateral soil and water load, the internal force of diaphragm wall is dominated by the circumferential force, while moment and shear force are relatively small. When its bottom was fixed, the maximum deformation of the wall appears near its bottom. Compare to other parameters, the parameter radius R influence the internal forces and deformation strongly. This article also gives some suggestions on the design of circular no-embeded diaphragm wall of swirl pool.