深圳地区超声回弹综合法混凝土测强曲线研究

Analysis of concrete ultrasonic-rebound-strength figure for Shenzheng district

基于超声回弹综合法全国统一测强曲线在深圳地区使用时误差较大的事实,按照《超声回弹综合法检测混凝土强度技术规程》中的要求,采用深圳常用的材料制作试块,选择有效的测试工具,进行了超声回弹测试,采集了有关的数据;并根据最小二乘法原理,推导计算公式,采用Java语言编写了回归程序,进行了二元线性回归、二元指数回归和二元指数乘幂混合回归三种拟合。结果表明,用后两种方法建立的回归曲线满足相关的国家要求,可以作为适用于深圳地区的超声回弹综合法测强曲线。

Based on the fact that the national unified curve of concrete ultrasonic-rebound-strength is unsuitable in Shenzhen district,ascertain formulas according to min-difference-square method have been established with experimental results.Materials used in experiments are local,and ultrasonic and rebound test were gathered with proper instruments.Results of the analysis to simulative curves have shown that the formulas satisfy the related demands while being used in the concerned region.