衡重式桩板挡墙内力及变形计算方法

衡重式桩板挡墙是一种新型支挡结构，在深圳地区的多个边坡工程中已经得到成功的应用，由于卸荷板的存在，挡土结构的受力和变形性状相对传统的桩板挡墙更为复杂，设计计算方法落后于工程应用。对此，将衡重式桩板挡墙沿地面分为受荷段和嵌固段两部分来简化受力分析，提出结构内力及变形计算模型和方法，推导了结构内力及变形计算公式。结合工程实例计算，与有限元法对比验证了推导的内力及变形计算公式是合理可行的。

Calculation on Internal Force and Deformation of Sheet Pile Wall with Relieving Platform

Sheet pile with relieving platform is a new type of retaining structure, which has been successfully used for reinforcing slopes in Shenzhen region. Owing to the existence of relieving platform, calculation of the stress and deformation thereof are more complex than that of traditional pile-plate retaining wall so that the designed calculation method falls behind the engineering practice. In this paper, the stress analysis was simplified in such manner that the sheet pile wall was divided into loaded segment and anchored segment along the ground surface, and then the model and method calculating the internal force and deformation of such structure were proposed with the formula thereof deduced. Finally, combining with the calculation in relation to case study, this formula was verified, by comparing to FEM, to be reasonable and feasible.