客运专线桥梁梁部大体积混凝土温度裂缝控制

Massive Concrete Temperature Crack Control for Bridge Girder of Railway Line for Passenger Traffic

为加强对浇筑体温度场与内表温差的监测与管理,通过采用在混凝土不同部位及深度的典型截面埋设热传感器,测试各典型截面的温度,及时绘出温度场、温降曲线图,一方面可指导降温、保温工作的进行;另一方面可通过测温总结出大体积混凝土的温度变化和分布规律,为以后在铁路客运专线桥梁工程的施工中防止大体积混凝土出现有害裂缝提供有价值的参考数据和方案。

For strengthening the supervision and management of temperature field of concrete and the temperature difference between inner face and surface, the heat sensors are buried in typical sections of concrete in different part and depth in order to test the temperature of each typical section and draw the temperature field graph and temperature drop graph which can guide the task of temperature lowering and thermal retardation. In addition, the changes and distribution rule of temperature of massive concrete can be summarized by temperature test. The research provides some valuable referential data and schemes for bridge construction of railway line for passenger transport in order to prevent cracks of massive concrete,