单面平测法在某渡槽工程裂缝检测中的应用

Application of Ultrasonic Level Testing Method in Cracking Detection of an Aqueduct Project

在渡槽工程的混凝土施工中不可避免的会产生裂缝,对于出现在混凝土表面的裂缝,一般采用在表面涂覆有机涂层、表面贴补或裂缝灌浆等方式来处理,为了验证裂缝处理方法的有效性,采用单面平测法测得裂缝处理前后的波速变化。结合某渡槽工程实例,介绍了单面平测法在混凝土裂缝检查中的应用。

Concrete cracks are commonly found in the aqueduct construction projects due to various adverse factors, such as, difference in loading conditions, temperature change, shrinkage of materials, rusty of steel reinforcement bars, swell induced by frozen and poor construction quality, etc. For cracks occurred at the concrete surface, the conventional mitigation methods are.. applying an organic paint cover, patching at surface or grouting at the cracks. The ultrasonic level testing is usually used to compare the sonic velocity changes before and after the treatment. The accurate measurement of the sonic velocity changes before and after concrete surface treatment is important for the effectiveness of the cracking mitigation work. The common ul- trasonic testing are： level testing, side testing and borehole sonic testing. This paper presents a case history of ultrasonic level testing application in the concrete cracking checking in an aqueduct construction project