预埋声测管：
    （1）桩径0.6-0.8m应埋设双管；桩径0.8-2.0m应埋设三根管；桩径2.0m以上应埋设四根管，根据赤峰桥具体情况，桩基可埋设三根管。
    （2）声波检测管宜采用钢管、塑料管或钢质波纹管，其内径宜为50～60mm。检测管连接处应光滑过渡，管口应高出桩顶100mm以上，且各检测管管口高度应一致，管的下端应封闭，上端应加盖，管内不得有异物，管身不得有破损。
    （3）检测管可焊接或捆扎在钢筋的内侧，检测管之间应互相平行。
 
声测管的现场检测
    （1）现场检测前测定声波监测仪发射至接受系统的延迟时间t。并计算声时修正值。
    （2）测量时发射与接收探头应以相同标高或保持固定高差同步升降。
    （3）测量点距为40cm，当发现异常时再加密到20cm.
    （4 ）选择适当的发射电压和放大器增益，并再测试过程中保持不变。
    （5）实时显示和记录接收信号的时程曲线。
    （6）将多根声测管以两根为一个检测剖面进行全组合，分别对多有剖面完成检测。

    （7）每组检测管测试完成后，测试点应随机重复抽测10％，其声时相对标准差不应大于5％；波幅相对标准差不应大于10％。

Embedded sound tube:
(1) diameter 0.6 0.8 m should be embedding double tube; Diameter 0.8 2.0 m should be buried three root canal; Diameter 2.0 m above four root canal should be buried, according to the specific situation, chifeng bridge pile foundation can be buried three root canal.
(2) the acoustic detection tube appropriate USES steel pipe, plastic pipe, or steel corrugated pipe, the inner diameter should be 50 ~ 60 mm. Detection of pipe joint should be smooth transition, nozzle should be 100 mm or more above the pile top, and the test tube mouth height should be consistent, the lower end of the pipe should be closed, shall be affixed to the top, the tube can not have a foreign body, the play shall not be damaged.
(3) the test tube can be welded or tied reinforcement on the inside, between the test tube should be parallel to each other.
Acoustic detecting tube site inspection
(1) the testing before the determination of acoustic monitor is the transmission and reception system delay time t. The sound and calculate the revised.
(2) the transmitting and receiving probe measurement should be in the same level or maintaining a constant altitude difference synchronization lifting.
(3) the measurement point to 40 cm, when found abnormal encryption to 20 cm.
(4) select the appropriate voltage and amplifier gain, and remains unchanged during the process of test again.
(5) the time history curve of real-time display and record the received signal.
(6) will be more acoustic detection tube for two root for all combinations, a test profile is section for more complete detection respectively.
(7) after completion of each group of test tube test, the test point should be repeated random parking 10%, relative standard deviation shall not be more than 5% when the sound; Amplitude relative standard deviation shall not be more than 10%.