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喷射混凝土是由非匀质材料组成,施喷又受到多种因素影响,强度离散往往较大,为使喷射混凝土的质量稳定在要求的范围之内,需要对强度进行控制,数理统计方法是达到此项目的的重要手段。 质量管理图有助于减少强度离散,在图上,喷射混凝土的质量状况及发展趋势,一目了然。只要喷射混凝土连续施作较长时间,质量管理图就可使用。
Sprayed concrete is composed of non-homogeneous materials, sprayed by a variety of factors, the strength of the dispersion is often larger, in order to make the quality of shotcrete stabilized within the required range, the need to control the intensity, mathematical statistics is achieved An important means of this project. Quality Management Chart helps to reduce the intensity of discrete, in the figure, the quality of the shotcrete and the development trend at a glance. As long as the sprayed concrete is continuously applied for a long time, the quality management chart can be used.