基于冲击弹性波和超声波的混凝土裂缝深度无损检测技术方法比较

Comparison of Non-destructive Testing Methods for Concrete Crack Depth Based on Impact Elastic Wave and Ultrasonic Wave

钢筋混凝土结构是最重要的土木、建筑结构,在建设及使用过程中由于各种缘由会产生裂缝,裂缝参数中深度是判定裂缝对结构安全影响程度的重要指标,裂缝深度的测量作为工程质量检测难点亟待解决。测量裂缝深度的常规方法为超声波法,但检测受影响因素较多,检测精度稍差。采用基于冲击弹性波的检测方法对混凝土结构裂缝深度进行检测,冲击弹性波受水和填充物影响小,能检测的裂缝深度更大,经不断改进现已成为一种新的检测裂缝深度的方法。通过工程实例对基于冲击弹性波的检测方法的可靠性进行验证后可知,该方法测试效果显著,值得推广。

Reinforced concrete structure is one of the most important civil architectural structures. Due to various reasons,there will be some cracks in the process of construction and use. The depth of crack parameters is the important index for determining influence on structure safety degree,so the depth of fissures of measurement is the engineering quality detection of difficulties to be solved. The conventional method to test the depth of fissures is ultrasonic method,but there are many factors affecting the detection,and the detection precision is a little poor. In this paper,the depth of the concrete structure crack is tested based on the impact of the elastic wave detection method. The impact elastic wave is less affected by water and filling,and the depth of the crack can be detected more deeply,so the elastic wave detection method has become a new method for detecting the depth of fissures through continuous improvement. Through the project example to validate the reliability of the testing method,the effect of detection method based on elastic wave impact is remarkable,and is worth promoting.