- 玉树声测管:
- 玉树声测管
- 玉树声测管:
- 玉树声测管
- 玉树声测管:
- 玉树声测管
The advantage of steel pipes is that they are easy to install. They can be welded to the steel frame by electric welding and can replace part of the steel bar section. Moreover, due to the high stiffness of the steel pipes, they can basically maintain their parallelism and straightness. Currently, many large-diameter cast-in-place piles All use steel as the acoustic tube. But the price of steel pipe is more expensive
Steel corrugated pipe is a better material for Yushu acoustic pipe. It has the characteristics of thin pipe wall, less steel and impermeability, pressure resistance, high strength and good flexibility. Usually The post-tensioning method is used to reserve holes in prestressed structures when used as Yushu acoustic pipes. It can be tied directly to the steel frame soil, and the joints can be connected with one size larger corrugated socket. Because the bellows is very light, it is very easy to operate, but care must be taken to keep its axis straight during installation.
The acoustic impedance of plastic pipes is low. When used as Yushu acoustic measuring pipes, they have greater sound transmittance and can usually be used for smaller cast-in-place piles. Caution should be used when using large cast-in-place piles because large-diameter piles require Pour a large amount of concrete, and the heat of hydration of the cement is not easy to dissipate. Since the thermal expansion coefficient of plastic is very different from that of concrete, the plastic pipe will shrink radially and longitudinally due to the temperature drop after the concrete solidifies, which may cause it to partially separate from the concrete and cause air Or the gaps between water add more strongly reflective interfaces to the sound path, which can easily lead to misjudgment.
The diameter of the Yushu acoustic tube is usually larger than the diameter of the radial transducer, and the common specification is the inner diameter. The wall thickness of the pipe has little impact on the sound transmission. Therefore, 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 it will be. More provinces.
Yushu acoustic tube manufacturer, Yushu acoustic tube can be processed to length