张北河暗渠裂缝成因分析及加固方案

Analysis and Reinforcement of Cracks in Closed Conduit of Zhangbeihe River

针对张北河暗渠管身混凝土所出现的裂缝,对其成因进行分析认为:导致混凝土出现裂缝的主要因素为大体积混凝土释放的水化热,产生较大的温度变化和收缩作用,由此而产生的温度和收缩应力;另外,暗渠浇筑混凝土质量不均匀,混凝土后期养护等因素也是导致混凝土产生裂缝的原因,针对裂缝成因提出了相应的加固处理方案。

For concrete cracks occurred in closed conduit of Zhangbeihe River, we thought the main reason was hydration heat by bulk mass concrete, which induced temperature change and contraction to produce stress; in addition, unevenly pouring quality and later curing of concrete also contributed to cracks. Relative reinforcement measures were put forward.