With reference to the round-ended hollow pier on Lanzhou ~ Chongqing railway four-track line station bridge,the measured temperature field distribution data are analyzed and summarized,and the temperature stresses under the conditions of cold weather and sunshine warming are calculated with 3D transient heat-ANSYS software. The results show that the temperature effect of the super wide hollow pier on four-track line and that of the hollow pier on common double-track line are much the same without obvious di...