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Guangdong acoustic measurement tube has what classification
Release time：
2022-09-28
Guangdong acoustic tube is an indispensable acoustic detection tube, which can be used to detect the quality of a pile. The acoustic tube is the channel through which the probe enters the pile body during ultrasonic detection of the cast-in-place pile. It is an important part of the ultrasonic testing system of the cast-in-place pile, and its embedded way in the pile and its layout on the cross section of the pile will directly affect the testing results. Commonly used pipes are steel pipe, steel corrugated pipe, plastic pipe 3 kinds.
Guangdong acoustic tube is an indispensable acoustic detection tube, which can be used to detect the quality of a pile. The acoustic tube is the channel through which the probe enters the pile body during ultrasonic detection of the cast-in-place pile. It is an important part of the ultrasonic testing system of the cast-in-place pile, and its embedded way in the pile and its layout on the cross section of the pile will directly affect the testing results. Commonly used pipes are steel pipe, steel corrugated pipe, plastic pipe 3 kinds.
Steel pipe. The advantage is that it is easy to install, can be welded in the steel skeleton, can replace part of the steel section, and because the steel pipe stiffness is larger. After being buried, the parallelism and straightness can be kept basically. Many large diameter cast-in-place piles use steel tubes as acoustic measuring tubes. But the price of steel pipe is more expensive:
Steel bellows. Is a good acoustic tube material, it has thin wall, steel and impermeability, pressure resistance, high strength, good flexibility and other characteristics, usually used in prestressed structure in the post-tensioning method reserved channel: when using acoustic tube. It can be directly bound on the steel skeleton, and the joint can be connected with a large corrugated pipe. Because the bellows are very light, it is very convenient to operate, but attention should be paid to keep its axis straight when installing.
Plastic pipe. The acoustic impedance rate is low, and the acoustic measurement tube has a large sound transmission rate. It can usually be used for small cast-in-place piles. Caution should be taken when using large cast-in-place piles, because large diameter piles need to be poured with a large amount of concrete, and the hydration heat of cement is not easy to diverge: In view of the difference between the coefficient of thermal expansion of plastic and concrete, the plastic pipe after concrete solidification due to the temperature drop and radial and longitudinal contraction, it is possible to make it and concrete local off and cause air or water cracks, in the acoustic pathway and increase more reflection strong interface, easy to cause misjudgment.
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