由于PE管不導電，不導磁，無法對PE管進行追蹤，給日后的管道維修帶來不便。地埋示蹤線有效地了非金屬管線不能用金屬管線尋管儀探查的問題。下面小編來講講示蹤線的作用與鋪設注意事項。

As PE pipe is non-conductive and non magnetic, it is impossible to track PE pipe, which brings inconvenience to pipeline maintenance in the future. The buried trace line effectively solves the problem that non-metallic pipelines cannot be detected by metal pipeline finder. The following section will talk about the role of the trace line and the precautions for laying.

一、示蹤線的作用

1、 The role of trace lines

“示蹤線”用于對PE管道的探測、追蹤及定位。“示蹤線”同PE管一起鋪設；一般會采用金屬線芯，通過探測設備給“金屬線”施加信號，由探測接收機接收信號，從而找到示蹤線的準確位置，即同步追蹤到PE地埋管道的具體位置；以便于對PE管道進行改造及維修。

"Tracer line" is used for the detection, tracking and positioning of PE pipes. "Tracer line" shall be laid together with PE pipe; Generally, metal wire cores are used to apply signals to the "metal wire" through the detection equipment, and the detection receiver receives the signals to find the exact location of the trace line, that is, to synchronously track the specific location of the PE buried pipeline; In order to facilitate the transformation and maintenance of PE pipes.

二、示蹤線鋪設注意事項

2、 Precautions for trace line laying

1、蹤線埋設時應緊貼PE管道呈直線狀，并位于管道的頂面為好。請勿以螺旋狀纏繞在PE管道上埋設，這樣易導致探測結果不準確。

1. The trace line shall be laid in a straight line close to the PE pipe and on the top of the pipe. Do not wrap the PE pipe in a spiral shape for burial, which may lead to inaccurate detection results.

2、在窨井或出地處示蹤線應該預留出一定長度的導線（1m以上為宜），供探測施加信號所用。這樣可提髙探測效率和精度。

2. A certain length of wire (more than 1m is appropriate) shall be reserved for the trace wire in the inspection well or out of the ground for signal detection. This can improve the detection efficiency and accuracy.

3、示蹤線接頭或分支點一定要連接牢固，保持良好導電,并用絕緣膠布包好，防止地下潮濕而造成腐蝕斷線情況，使探測信號中斷。管道的鋼塑轉換接頭處示蹤線可以焊接在法蘭上，接點處做好防腐處理，防止日久后腐蝕斷線。

3. The connector or branch point of the tracer wire must be firmly connected to maintain good conductivity, and be wrapped with insulating tape to prevent corrosion and breakage caused by underground moisture, which may interrupt the detection signal. The trace line at the steel plastic conversion joint of the pipeline can be welded on the flange, and the joint shall be subject to anti-corrosion treatment to prevent corrosion and wire breakage after a long time.

4、為增加示蹤線的信號強度并讓信號分布均勻，施工時須盡量減小示蹤線埋地末端的接地電阻，采取剝掉絕緣層裸露芯線30cm的良好接地措施。特別是對于長度較短的分支管的末端，一定要接地良好，否則分支上的信號會非常弱而探測不到。

4. In order to increase the signal strength of the tracer wire and make the signal distributed evenly, the grounding resistance at the buried end of the tracer wire must be reduced as much as possible during construction, and good grounding measures shall be taken to strip the insulation layer and bare core wire for 30cm. Especially for the end of the branch pipe with short length, it must be well grounded, otherwise the signal on the branch pipe will be very weak and cannot be detected.

5、若管道埋地長度超過1km，中間又沒有窨井等設施供預留示蹤線頭滿足探測之需，則建議每處設一個測試樁并預留示蹤線接頭供探測時使用。

5. If the buried length of the pipeline exceeds 1km and there is no inspection well or other facilities in the middle to reserve the tracer head to meet the needs of detection, it is recommended to set a test pile every kilometer and reserve the tracer joint for detection.

6、在非開挖工程施工中，PE管道外面的示蹤線在拖管過程中容易被扯斷，簡便的辦法是選擇截面積更大、強度更高的導線或鋼絲繩，或者在管道的內部預穿一條示蹤線即可避免斷線，其探測效果如同在外面一樣，但這樣做時需處理好內部示蹤線頭與外面示蹤線連接的問題。

6. During the trenchless construction, the tracer line outside the PE pipe is easy to be broken during the pipe dragging process. The simple method is to select a conductor or steel wire rope with larger sectional area and higher strength, or to pre thread a tracer line inside the pipe to avoid breakage. Its detection effect is the same as that outside, but the connection between the internal tracer line head and the external tracer line needs to be handled properly when doing so.

7、在某些特殊情況下，對PE管道無法應用示蹤線，這時可采用預埋示蹤球的方法滿足今后的探測定位需要。

7. In some special cases, the tracer line cannot be applied to PE pipes. At this time, the method of embedding the tracer ball can be used to meet the needs of future detection and positioning.

示蹤線的作用與鋪設注意事項就講解到這里了，如果您對此有什么不了解的問題或者說，您有什么需求就來我們網站http://m.scnu-graduate.com咨詢吧。

This is the end of the function and laying precautions of the trace line. If you have any questions or needs that you do not understand, please come to our website http://m.scnu-graduate.com Consult.