地下变电站大体积混凝土温控抗裂技术研究

Research on Temperature Control Anti-cracking Technology of Mass Concrete in Underground Substation

变电站作为电力行业重要的一部分,对其自身的建筑工程质量及性能有较高的要求,特别是对混凝土技术的要求更高。混凝土裂缝的出现,会导致混凝土的质量下降,而变电站如果一旦存在裂缝就会增加渗水漏水的风险,更有可能造成变电站因渗漏水导致的损毁漏电,从而造成更大的危害。本文对武汉徐东220kV变电站的地下室底板实施混凝土温度控制技术,其混凝土平均最高温峰控制在40℃以内,没有出现贯穿的有害裂缝,可对地下变电站工程的大体积混凝土抗裂工作提供一定参考。

As an important part of power industry,substation has higher requirements for its construction engineering,especially for concrete technology.The occurrence of concrete cracks will lead to the deterioration of concrete quality,and the presence of cracks in substation will increase the risk of leakage of seepage water,which is more likely to cause damage and leakage of electricity in substation due to leakage of water,thus causing greater harm.Through the implementation of concrete temperature control technology on basement floor of Xudong 220 kV substation in Wuhan,the average maximum temperature peak of concrete is controlled within 40℃,and no harmful cracks appear through it,which provides a partial reference for anti-crack work of mass concrete in underground substation project.