Proper use of acoustic tube allows acoustic tube longer life, longer life, following a brief introduction to the use of screw-type acoustic tube. The next section steel cage acoustic pipe installation: the A tube (bottom tube with plug) on ??the ground to reflect the possibility of seals intact, then the B tube pierce A tube until far into the bottom of the tube A, then the spiral tightening can. Good then the acoustic tube into the steel cage, outlaw size fastened on the reinforcement steel cage, no steel cage on the site, acoustic tube steel bracket available or three main steel reinforcement, bondage is not greater than the distance two meters. ?? Spiral Acoustic Pipe simple connection, acoustic tube without on-site welding, using screw type connection, screw drive Twill, locking gasket, seal axial end, effective anti-loose, anti-leakage, fast and safe lunch and reduce costs. Installation joints with less than one minute, the festival parade and parade about each work without any skills support. Preliminary site without obligation to outside, without any equipment, concise and efficient (5 times faster than traditional methods), just fixed in the steel cage, is not affected by the bad weather in the deeper bridge ?? Bored Construction on bored pile quality testing standards require the use of acoustic transmission method; in accordance with the design requirements should be buried acoustic tube, plain 120cm-180cm diameter pile piles buried three required in conventional designs require the use of an outside diameter popular pipe, 50-60mm in thickness around 3.Omm, plus the use of the construction site welding casing, this approach required a higher cost. Acoustic tube construction costs my company produced only about 60 percent of construction costs plain pipe, greatly reduce the construction costs. ??? Bridge pile during the pouring of concrete for the acoustic tube sealing, anti-leakage, compression, etc. require extraordinary grim, a little less would constitute a blocked pipe or tube deformation, plain pipe by each construction in construction team as welding obligation acoustic tube wall can not be detected, the interface and the bottom of the tube seal sealing and anti-leakage; difficult to guarantee quality. And I need to be produced by the acoustic tube three detection process (ie, early detection, gas detection, water detection), manufactured products pass rate of 100%, and then guarantee the product to meet the requirements of the construction techniques.