重载铁路混凝土箱梁顶推施工应力分析及监测

Stress Analysis and Testing of Concrete Box Girder in Heavy Haul Railway Jacking Construction

通过跨汉宜高铁特大桥混凝土连续箱梁顶推施工实例,从强度、刚度和稳定性方面分别对钢管柱支架及钢导梁进行应力监测分析,从抗压、抗拉特性方面对混凝土箱梁进行应力监测分析,研究分析各种异常情况下继续顶推的可行性,以确保混凝土箱梁在顶推过程中安全顺利进行。

Through the jacking construction examples of concrete continuous box girder across Wuhan-Yichang High-speed Railway, this paper gives a stress monitoring analysis to the steel tube column and steel guide beams from the strength, stiffness and stability respectively for stress monitoring analysis. And the stress analysis is carried out to the concrete box girder from the compressive and tensile properties. Also the feasibility of continuing pushing in all cases is given a research and analyzed, so as to ensure the safety of concrete box girder in the process of pushing.