超声面波法在混凝土强度检测中的应用研究  

The application of ultrasonic surface wave method to concrete strength testing

作　　者：杨道煌 刘江平[1] 程飞 庞凯旋 YANG Dao-Huang;LIU Jiang-Ping;CHENG Fei;PANG Kai-Xuan(Institute of Geophysics and Geomatics,China University of Geosciences(Wuhan),Wuhan 430074,China;College of Marine Science and Technology,China University of Geosciences(Wuhan),Wuhan 430074,China)

机构地区：[1]中国地质大学(武汉)地球物理与空间信息学院,湖北武汉430074 [2]中国地质大学(武汉)海洋学院,湖北武汉430074

出　　处：《物探与化探》2020年第3期626-634,共9页Geophysical and Geochemical Exploration

基　　金：国家自然科学基金项目“三维柱坐标下隧道复杂地质体的地震模拟与响应机理研究”(41704146)。

摘　　要：混凝土作为建筑工程中的主要材料,其质量情况与人们的生命财产息息相关。强度等级是衡量混凝土品质的重要指标,因此需对混凝土结构体的强度进行检测。基于超声波检测仪得到面波数据,获得目标混凝土结构体的面波频散曲线,并使用阻尼最小二乘法实现面波速度反演,从而获得目标混凝土结构体的横波速度结构,基于弹性模量法和幂函数方程拟合法计算出强度值,进而实现对混凝土强度的评价。结果表明:①采用超声面波法可有效获得混凝土结构体横波速度结构;②弹性模量法和幂函数拟合法均能对混凝土强度进行评价,是一种行之有效的方法,其中弹性模量法能够达到实际精度要求,为混凝土质量检测提供了新途径。Concrete is the main material in construction engineering,and its quality is closely related to people's life and property.The strength grade is an important indicator of the quality of the concrete,so the strength of the concrete structure needs to be tested.In this paper,the surface wave velocity inversion is realized by the least square method to obtain the shear wave velocity structure of the target concrete structure,the strength value is calculated based on the elastic modulus method and the power function fitting method,and then the concrete strength is evaluated.The results are as follows:First,the shear wave velocity structure of concrete structure can be obtained effectively by using the ultrasonic surface wave method.Second,both the elastic modulus method and the power function fitting method can evaluate the strength of concrete,which is effective and the elastic modulus method can meet the actual accuracy requirements,thus providing a new way for the quality detection of concrete.

关 键 词：瑞利波 弹性模量 幂函数拟合 混凝土强度 

分 类 号：P631.4[天文地球—地质矿产勘探]