拱脚混凝土水化温度应力与裂缝控制研究

Study on temperature stress and crack control of arch springing concrete hydration

以杭长客专乌溪江钢管混凝土提篮式系杆拱桥为背景,采用现场测试与数值模拟分析相结合的研究方法,对混凝土拱脚温度应力及可能产生的早期表面温度裂缝宽度进行了分析与预测,研究了控制早期开裂的施工技术措施以及构造措施,以减少早期温度应力,降低裂缝的产生几率。

Taking the basket handle tied arch bridge of Wuxijiang steel pipe concrete of Hang-Chang passenger special railway line as the back- ground, applying the research methodology of field testing in combination with numerical simulation analysis, the paper analyzes and predicts con- crete arch springing temperature stress and early surface temperature cracking width, and makes a study of controlling early cracking construction technology and structural measures, with a view to reduce early temperature stress and reduce cracking ratio.