Method for detecting grouting quality of bridge prestressed pipes based on combined seismic source method

Abstract

The invention provides a source array method based detection method of grouting quality of a bridge prestressed pipeline. According to the detection method, a hammer source and a Chirp source are effectively combined together, advantages of the hammer source and the Chirp source are sufficiently played, meanwhile, disadvantages of the hammer source and the Chirp source are effectively avoided, so that the position of a first-motion wave can be accurately determined, an elastic wave field graph with high resolution can be obtained, and the grouting quality of a bridge prestressed pipeline can be accurately detected; the detection method further has the advantages as follows: the detection result is more accurate, the detection efficiency is high, requirements for the environment are low, the capacity of resisting disturbance is high, and the detection method can be used under the condition of absence of intensive vibration and impact; and besides, the operation is safe, and the detection method is harmless to human beings.

Description

technical field [0001] The invention belongs to the technical field of grouting quality detection, and in particular relates to a method for detecting the grouting quality of bridge prestressed pipelines based on a combined seismic source method. Background technique [0002] The grouting quality of bridge prestressed pipelines has an important impact on the durability of bridges. According to statistics, the steel strands in the pipelines are corroded due to insufficient grouting, and the prestress is lost in advance, which can shorten the actual life of the bridge to ten percent of the design life. one. Therefore, the grouting quality inspection of prestressed pipes is an important measure to ensure the quality of bridge construction, and has important theoretical and practical value. [0003] In the grouting quality inspection of prestressed pipelines, the commonly used detection method is the elastic wave detection method. The principle is: arrange a seismic source at o...

AI Technical Summary

Problems solved by technology

However, there is a contradiction between accurately determining the position of the first arrival wave and the resolution of the elastic wave field diagram. , but it is difficult to accurately determine the position of the first arrival wave; or, the position of the first arrival wave can be accurately determined, but the resolution of the elastic wave field map is limited

Therefore, the various existing schemes have certain limitations, and it is difficult to meet the requirements of grouting quality inspection for prestressed pipelines

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