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中心岛施工法中预留土台具有减小围护结构内力和变形、节约成本、设置灵活等优点在工程中应用日益广泛,然而预留土台作用下围护结构的计算方法还不成熟。本文基于Winkler弹性地基反力法,根据围护结构沿竖向受力模式的不同,提出了一种新的计算分析模型及控制方程组,推导了围护结构内力及变形计算的数学解析解矩阵表达式,并给出解析解解答方法。最后,编制Matlab计算程序进行围护结构内力及变形计算,并与现场监测数据结果进行对比分析来验证解析方法的可靠性,结果证明该方法能够准确计算中心岛施工法围护结构内力及变形。
The reservation of soil platform in the center island construction method has the advantages of reducing the internal force and deformation of the retaining structure, saving cost and setting flexibility. However, the calculation method of the retaining structure under the reservation of soil platform is not yet mature. In this paper, based on Winkler elastic foundation reaction force method, a new calculation and analysis model and control equations are proposed according to the difference of vertical stress modes of enclosure structure. The mathematical analytical solution matrix of internal force and deformation calculation Expression, and gives the analytical solution. Finally, the Matlab calculation program is compiled to calculate the internal force and deformation of the envelope, and compared with the field monitoring data to verify the reliability of the analytical method. The results show that this method can accurately calculate the internal force and deformation of the envelope of center island construction method.