桩板式无土路基上部结构计算与设计

Calculation and Design of Superstructure of Pile Slab Subgrade without Soil

为研究桩板式无土路基在高速公路改扩建工程中的应用,利用有限元分析软件Midas Civil建立板单元模型,并对桩板式无土路基上部结构尺寸拟定、温度梯度模拟、移动荷载加载方式进行探讨,模拟接近实际的预制板约束条件,对板单元控制截面基本组合下的纵横向弯矩、剪力进行强度验算,介绍了正常使用极限状态下的弯矩配筋计算与设计,以期为类似工程提供有益参考。

In order to study the application of pile slab subgrade without soil in the reconstruction and expansion project of expressway,the software of finite element analysis Midas Civil is used to establish the plate element model,and the superstructure size determination,temperature gradient simulation and loading mode of moving load of the pile slab subgrade without soil are discussed.The simulation is close to the actual constraints of the precast slab.The strength checking calculation of the longitudinal and transverse bending moment and shear force under the basic combination of the plate element control section is carried out.The calculation and design of the bending moment reinforcement under the normal use limit state are introduced,so as to provide useful reference for similar projects.