某高速轨道交通高架桥基础设计与分析

Design and Analysis of a High-speed Rail Transit Viaduct

位于北京市东北部的某轨道交通高架桥区间,设计车速高达160km/h,为保证列车平稳高速运行,对高架桥基础设计与施工提出了更高要求。结合工程场地所属地质条件与规范要求,提出了3种可以选择的桩基础设计方案,通过静载试验和数值模拟计算,对其承载特性、沉降量、经济性等方面进行分析,选择出最优的可行性方案。

The rail transit viaduct is located in the northeast of Beijing,whose design speed is as high as 160 km/h. In order to ensure the safe and high-speed operation of the train,a high requirement for the design and construction of viaduct foundation is demanded. Based on the geological conditions and specifications of the engineering,this article brings on three reliable pile foundation design schemes. After static load test and numerical simulation calculation,the bearing capacity,settlement and economy of the pile foundation are analyzed and evaluated,and the best feasible scheme is selected.