原煤自燃温升对煤码头堆场坑道混凝土构件性能的影响

自燃现象在原煤储运码头堆场经常发生,并对堆场的混凝土构件造成一定程度的影响。自燃与建筑物遭受火灾对混凝土结构的影响有一定的差别,自燃的影响以温升为主。混凝土在持续高温下将产生一系列的物理化学变化,这些变化是结构混凝土在持续温升中产生损伤的主要原因。本文通过原煤自燃火灾对煤码头堆场坑道混凝土构件性能影响的调查,总结特定状态下混凝土构件受持续高温作用的性能,为码头坑道混凝土构件的维护及设计提供参考。

The Influences of Spontaneous Combustion of Raw Coal on Concrete Members in Tunnels of Quay

Spontaneous combustion, which often takes place at quay of raw coal warehousing and transportation, can damage the concrete members of tunnels. There are some differences between the influence of the spontaneous combustion and that of the fire of the building. The character of the spontaneous combustion is mainly a durative high temperature. And series of physical and chemical changes will occur in concrete at a durative high temperature, which is the primary reason of concrete damage in spontaneous combustion. By investigating the influences of the spontaneous combustion of raw coal on concrete members in tunnels, properties of concrete members under durative high temperature are analyzed which can provide some references for maintenance and designs of concrete members in tunnels of quay.