A comprehensive geophysical prospecting combined diagnosis method for internal hidden dangers of wharf concrete structures

Abstract

The invention discloses a comprehensive geophysical-prospecting combined diagnosis method for hidden danger inside a wharf concrete structure. The comprehensive geophysical-prospecting combined diagnosis method comprises the following steps: dividing the surface of a detected concrete structure into cells on the spot; detecting by adopting an impact-echo instrument; according to the impact-echo data, calibrating sound wave transmission speed of the detected concrete structure and finding out positions of internal defects by adopting a ground penetrating radar instrument; detecting CT images of the internal defects by adopting an ultrasonic CT imaging method, and further checking the true and the false of the defect images of a geological radar process, and finally determining the types and the positions of the internal defects of the concrete by comparing the image with design data. Compared with the prior art, the comprehensive geophysical-prospecting system method has the advantages that a system method and a novel technology for comprehensive geophysical-prospecting of hidden problems of concrete structure quality of a long piled wharf are formed by virtue of a plurality of large-scale high piled wharf projects, so that perspective eyes are provided for quality control, and therefore, the technical blank in nondestructive examination and safety assessment for the quality hidden problems of the high piled wharf projects in China is filled up.

Description

technical field [0001] The invention relates to an implementation method of a water transport project, in particular to a comprehensive geophysical exploration combined diagnosis method for hidden dangers inside a wharf concrete structure. Background technique [0002] The quality and operation status of water transportation projects are major issues related to the national economy and the people's livelihood. There are possible internal hidden dangers such as cracks, cavities, steel bar corrosion, and broken piles in the concrete structure. How to inspect the project quality in a hidden state has always been a constraint on project quality. Check for bottleneck issues. There are the following disadvantages in the detection of hidden dangers inside the concrete of traditional wharf structures: (1) It is difficult to accurately determine the nature and location of hidden dangers due to the limitations of the instrument itself. For example, the electromagnetic method cannot de...

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Problems solved by technology

There are the following disadvantages in the detection of hidden dangers in the concrete of traditional wharf structures: (1) It is difficult to accurately determine the nature and location of hidden dangers due to the limitations of the instrument itself. For example, the electromagnetic method cannot detect the underground diaphragm wall containing steel bars, and the acoustic wave method It is impossible to detect the steel sheet pile structure with a large depth, and the internal conditions of the underwater concrete structure cannot be accurately detected by the electrical method.

(2) In the geophysical method, the detection depth is inversely proportional to the detection accuracy, and a single method cannot distinguish defects of different depths and volumes on the same component; with the rapid growth of China's waterway engineering infrastructure construction, it is urgent to detect the quality of waterway engineering New technologies and methods to conceal problems

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