山区深水环境高墩结构选型研究

以某山区水库高速公路建设项目为工程背景,针对其高墩、深水桩基的显著特点,应用有限元分析软件建立了考虑不同墩高和桩长参数的实体板式、空心薄壁和格构式高墩连续T梁全桥计算模型;分别从上部结构受力性能、墩身内力、墩顶水平位移和抗震设计等方面对三种墩型进行了详细的对比分析,并对高墩设计选型中的一些关键问题进行了讨论,可为类似山区水库高墩桥梁的合理选型提供参考。

Research on Selection of Types of High Piers in Mountainous Deep-water Area

The selection of high pier type is a key factor controlling the design of highway bridge with high pier in mountainous area. On the basis of a practical construction project of high pier structure in mountainous deep-water area,comparative analysis are conducted on three types of high piers,including solid plate-type pier,lattice-type pier and hollow thin-walled pier. Firstly,nine finite element models of continuous T-girder bridges considering different types of pier,pier height,and pile length are established. Next,the mechanical performance of bridge superstructures and piers,horizontal displacement at pier top,and seismic performance of high piers are analyzed. Finally,some critical issues concerned with the optimization design of high piers are discussed,providing guidance for the similar construction project of high pier structures in mountainous deep-water area.