Method and device for detecting mudjacking saturation of post-tensioned prestressed concrete beam pipe

Abstract

The invention discloses a method and device for detecting mudjacking saturation of a post-tensioned prestressed concrete beam pipe. The method comprises the following concrete steps: 1, a target body is determined to be a prestress anchor cable, two ends of the anchor cable are provided with an elastic wave exciting device and an elastic wave receiving device, the acoustic time is measured, and the wave speed of the anchor cable is calculated according to the length of the anchor cable; 2, a target body is determined to be a prestressed concrete beam, two ends of the beam with the same height and the same horizontal position are provided with an elastic wave exciting device and an elastic wave receiving device, the acoustic time is measured, the wave speed of the concrete is calculated according to the length of the beam, and each beam is measured once; 3, a target body is determined to be a pipe of the prestressed concrete beam, locksets of two ends of the pipe are provided an elastic wave exciting device and an elastic wave receiving device, the acoustic time is measured, and the wave speed of the pipe induration is calculated according to the length of the pipe and the thickness of the locksets; and 4, the mudjacking saturation of the pipe to be detected is calculated by using the following formula according to the average wave speed C(b)of the anchor cable, measured in the step 1, the wave speed C(m j) of the concrete to be detected, measured in the step 2, and the wave speed C(t j i) of the pipe solidification to be measured, measured in the step 3.

Description

technical field [0001] The invention relates to a post-tensioned prestressed concrete beam pipeline grouting plumpness detection method and device, belongs to the field of applied geophysics ultrasonic detection technology, and in particular relates to the acoustic wave detection technology of the integrity of a concrete structure by a transmission method. Background technique [0002] Prestressing channel grouting is to inject cement slurry into the reserved prestressed concrete channel, so that the cement slurry fully wraps the prestressed tendon. In this way, the prestressed steel bars can be protected from corrosion, and the safe life of the prestressed concrete structure or components can be guaranteed; the prestressed steel bars can be well combined with the concrete to ensure the effective transmission of the prestressed force, so that the prestressed steel bars and concrete can work together, and the deformation is consistent; Prestressed concrete structures or compo...

AI Technical Summary

Problems solved by technology

This method not only has low work efficiency, but more importantly, in the actual bridge inspection process, the pipe material, pipe diameter and buried depth, multi-pipe overlap, other ordinary steel bars and concrete in the beam will all affect the test results, making it difficult to analyze and analyze. judge

Therefore, it has not been widely used in actual testing until now.

Images