CAJ | 학술논문

用超声波法对强度等级分别为C20、C25、C30、C40的立方体标准试块进行波速的测定，采用四种不同的数学模型进行回归分析，得到混凝土强度与声速之间相互关系式，从而建立强度计算公式。结合灌注桩的实测数据，利用一次二阶矩法对计算强度值进行可靠度分析。分析结果表明，该法可用于对桩身质量进行快速无损检测。
용초성파법대강도등급분별위C20、C25、C30、C40적립방체표준시괴진행파속적측정，채용사충불동적수학모형진행회귀분석，득도혼응토강도여성속지간상호관계식，종이건립강도계산공식。결합관주장적실측수거，이용일차이계구법대계산강도치진행가고도분석。분석결과표명，해법가용우대장신질량진행쾌속무손검측。
The sound velocity of different grades (C20, C25,C30, C40) of cubic standard test block was measured by ultrasonic method, and the "speed-strength" formula was established through regression analysis of four function model. Through this equation, the strength of concrete could be calculated. Using the measured data of bored pile, the reliability of the calculated value of the strength was analyzed by the method of FOSM. Analysis results showed that ultrasonic method could be used for quick and nondestructive detection of pile quality.