Research on Non-destructive Monitoring and Evaluation of Crack in Semi-rigid Base
At present,the non-destructive evaluation technology of semi-rigid base crack is not ma-ture,which can not judge the damage of base scientifically and efficiently.In this paper,the distribu-ted optical fiber sensor is used to monitor the strain of cement-stabilized graded crushed stone beam through laboratory tests,and the non-destructive monitoring technology of semi-rigid base crack is proposed.Based on a highway physical project,the quality evaluation index of each structural layer was obtained by traditional detection means,and a non-destructive evaluation method was established for the damage condition of semi-rigid base.The results showed that distributed optical fiber could ef-fectively monitor the location and size of the base crack,and should be packaged and protected during the actual laying process to improve the survival rate of optical fiber in practical application.There is a significant correlation between the surface deflection of the base and its damage condition,and the damage condition and characteristics can be inferred from the surface deflection of the base.The atten-uation ratio of the base modulus has a good linear correlation with the damage condition in the double logarithmic coordinate system.The base modulus can be retrieved by the surface layer deflection ba-sin,and the objective of the non-destructive evaluation of the base condition can be realized.
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维普
