苏通大桥南塔墩承台超大体积混凝土施工温控关键技术

苏通大桥南主塔墩承台为超大体积混凝土,为防止出现温度裂缝,施工中采取了合理分层、双掺技术、内散外蓄、温度应力监测等温度控制措施,有效地控制了混凝土的最高温升和内外温差,施工后的承台质量,达到内实外美,未产生温度裂缝,并根据实际监测数据与温控理论计算进行了对比分析。

Key Temperature Control Techniques of Super-volume Concrete Casting Used in Pile Cap of South Pylon of Sutong Bridge

With the pile cap construction of the south pylon of Sutong Bridge the key temperature control techniques of the super-volume concrete casting used in the pile cap of the cable-stayed bridge are discussed and the temperature control measures adopted in the construction which include the reasonable layering, the double mixture technique,the dispersion inside and the cumulation outside, the temperature stress monitoring etc.The compare and the analysis are done from the datas of the factual monitoring and the results of the theory calculation.