Cangzhou Huayang Steel Co

The diameter of the acoustic tube is usually larger than the diameter of the radial transducer, that is, the commonly used specification is the inner diameter -. The wall thickness of the pipe has little effect on the sound transmission, so in principle there is no limit on the thickness of the pipe wall. However, from the perspective of saving steel, as long as the pipe wall can withstand the lateral pressure of newly poured concrete, the thinner the pipe wall, the more economical it will be.
Should be basically kept parallel - if the test results need to evaluate the strength of the concrete at each measuring point, the non-parallelism should be controlled below. The steel cage should be prevented from twisting when placed in the pile hole.
The pipes are generally installed in sections along with the steel cages. The joints between each section can use reverse threaded sleeve interfaces or casing welding solutions as shown in the figure: If corrugated pipes are used, it can be advantageous to use larger corrugated pipes. Wrap and seal with tape at both ends of the casing. Regardless of the joint scheme, it must ensure that no slurry leaks under high hydrostatic pressure. The inner wall of the joint should be kept flat and should not have welding slag, burrs and other protrusions so as not to hinder the free movement of the probe. The bottom of the acoustic detection tube should also be installed in a sealed manner. After completion, the upper opening should be blocked with a wooden plug to prevent foreign objects from falling into the hole and causing blockage when pouring concrete.
Picture of the installation method of acoustic detection tube
) Socketing of steel pipes) Socketing of corrugated pipes
- Steel bars - acoustic detection tubes - sleeve pipes - stirrups - sealing tape
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d: Other uses of the acoustic tube
d:
In addition to being used as a detection channel
and replacing part of the steel bar section, the d acoustic tube can also be used as a pipe for grouting at the bottom of the pile. . Tests have proven that cast-in-place piles treated with pile base slurry can significantly increase their bearing capacity. At the same time, the acoustic pipe can also be used as a pipeline for flushing and grouting treatment of accident pile defects. At this time, measures need to be taken to penetrate the pipeline in the defective part that needs grouting.
The overall requirements for ultrasonic transmission method testing for acoustic pipes are: the joints are firm and do not come off, the seals do not leak, the pipe walls are flat and not bent, smooth and deformed, the pipe body is vertical and not skewed, and there is no foreign matter in the pipe.
When the acoustic pipe material or installation process is poor, it may cause accidents such as slurry leakage, pipe blockage, breakage, bending, sinking, deformation, etc., which will have a greater impact on the pile foundation integrity detection using the ultrasonic transmission method. Due to the inability to carry out ultrasonic transmission detection.
Based on the above situation, we have launched the acoustic detection tube from Guangzhou Goldsheng Building Materials Co., Ltd. through corresponding theoretical calculations and a large number of engineering practices