Acoustic Pipe factory Longyan Longyan Longyan Acoustic Pipe manufacturers Spot acoustic tube

? 1, embedded Longyan Acoustic Pipe manufacturers: (1) pile diameter 0.6-0.8m should be buried double pipe; pile diameter 0.8-2.0m should be planted three root canal; pile diameter 2.0m should be buried more than four root canals, according to Chifeng bridge specific circumstances, can pile buried three tubes. ? (2) Sonic Longyan Acoustic Pipe manufacturers should use steel, plastic or steel bellows tube having an inner diameter is preferably 50 ~ 60mm. Longyan Acoustic Pipe factory connections should be smooth transition, the nozzle should be more than 100mm above the top of the pile, and each Longyan Acoustic Pipe factory nozzle height should be consistent with the lower end of the tube should be closed, shall be affixed to the upper end, not a foreign substance, tube body may not have broken. ? (3) Longyan Acoustic Pipe manufacturers can be welded or tie on the inside of steel, should be parallel to each other Longyan Acoustic Pipe manufacturers. ? (4) in Longyan Acoustic Pipe manufacturers should be filled with water. ? 2, using acoustic transmission method. It will transmit ultrasound probe and receiving probe were previously buried under the pile and into the water-filled pipe in different ultrasonic sonde produced water coupling penetrate through concrete pile reach another pipe in the receiving probe, receiving the probe will receive Letter to the information passed instrument, received through a comprehensive analysis of ultrasonic wave in concrete: If the speed of sound, the sound amplitude, frequency and waveform characteristics of various parameters, while the pile of concrete quality assessed. Its fundamental basis is: when there is a defect in concrete, ultrasonic velocity, acoustic amplitude, frequency and waveform of various parameters are reflected. The first is when the concrete internal defects in the ultrasonic path is formed of a collection of discrete media, ultrasounds would bypass defects propagate forward in the detection range, the diffraction reach the desired "sound"; ratio When the non-defective concrete directly required to propagate ultrasound "sound"; long, reflecting the ultrasonic sound velocity decreases. Second, due to the presence at the lack of defects, ultrasonic wave propagation in concrete acoustic energy attenuation increase, the first received signal wave amplitude decreased. The third is due to the presence of defects in the concrete, high-frequency components disappear quickly than the low-frequency component, the frequency of the received signal is always received by the same distance than the non-defective concrete low frequencies. Finally, since the ultrasound reflections on the complex defect interface, refraction, the phase difference between the occurrence of acoustic wave propagation, resulting superimposed causes the waveform of the received signal is distorted. According to internal quality concrete to make judgments. ? Detecting points? 3, field testing? (1) on-site measuring acoustic emission monitor system to the delay time t accepted before testing. And correction value for calculating sound. ? (2) measuring the emission and reception probe should remain fixed at the same level or synchronous lifting height. ? (3) measuring pitch of 40cm, when abnormal when re-encrypted to 20cm.? (4) Select the proper transmission voltage and the amplifier gain, and then remain constant during the test. ? (5) Real-time display and recording of the received signal-time curve. ? (6) a plurality of Longyan Acoustic Pipe factory with two full cross-section of a detector combination, respectively, more than a cross-sectional view complete testing. ? (7) after each set of Longyan Acoustic Pipe factory test is completed, test points should be repeated random sampling tests 10% relative standard deviation when the sound should not exceed 5%; relative standard deviation should not exceed 10% of the amplitude. ? 4, data compilation perform "Construction pile testing technical specifications" (JGJ106-2003J256-2003) Longyan Acoustic Pipe factory Li Shuwen:?? 15612759879 Tel: 0317-5102751 Fax: 0317-5102751 QQ: 864331432 Website: www.czsyscg .com Acoustic Pipe factory Longyan Longyan Longyan Acoustic Pipe manufacturers Spot acoustic tube