重庆市某果品冷库工程为现浇无梁楼盖,该屋面天沟由 L 形钢筋混凝土整浇天沟板(带圈梁)和砖砌体组合而成(图1)。工程竣工后经过一个雨季,天沟板底面出现十多条裂缝,裂缝宽为0.2～0.3mm,下雨时有2～4处严重滴漏。通过分析和蓄水试验,证实了雨水是由砖砌体缝隙内渗入的。 The fruit cold storage project in Chongqing is a cast-in-place beamless floor. The roof gutter is composed of L-shaped reinforced concrete cast-in-drift boards (with ring beams) and brick masonry (Figure 1). After the completion of the project, more than ten cracks appeared on the underside of the gutter plate after a rainy season. The crack width was 0.2-0.3 mm, and there were 2-4 serious leaks during the rain. Through analysis and impoundment tests, it was confirmed that rainwater infiltrated the gaps in the brickwork.