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本文分析了钢纤维砼的防水机理,刚性屋面防水层的受力特点和影响开裂的主要因素。建立了防水层在温差和砼收缩作用下的平面受力计算模型,推导出钢纤维细石砼刚性屋面防水层伸缩缝最大间距的计算公式,并根据这一公式,作了540m~2的试验屋面。通过实验确定了屋面基层的水平阻力系数C。
This paper analyzes the waterproof mechanism of the steel fiber concrete, the stress characteristics of the rigid roof waterproof layer and the main factors that affect the cracking. The calculation model of the plane force of the waterproof layer under the action of temperature difference and enthalpy contraction was established, and the formula for calculating the maximum distance between the expansion joints of the steel fiber fine stone rigid roof waterproof layer was deduced, and a test of 540m~2 was made based on this formula. Roofing. The horizontal resistance coefficient C of the roof base was determined through experiments.