由于PE管不導(dǎo)電，不帶磁性，無(wú)法對(duì)PE管進(jìn)行跟蹤，給以后的管道維護(hù)帶來(lái)不便。氣體示蹤線(xiàn)有效了非金屬管道不能用金屬管道探測(cè)器探測(cè)的問(wèn)題。那么鋪設(shè)示蹤線(xiàn)有哪些注意事項(xiàng)呢？

Because the PE pipe is non-conductive and non-magnetic, it is impossible to track the PE pipe, which brings inconvenience to the future pipeline maintenance. The gas tracing line effectively solves the problem that non-metallic pipelines cannot be detected by metal pipeline detectors. So what are the precautions for laying the trace line?

1、走線(xiàn)埋設(shè)時(shí)，應(yīng)緊靠PE管成一條直線(xiàn)，好位于管頂面。不要以螺旋狀埋在PE管上，容易導(dǎo)致檢測(cè)結(jié)果不準(zhǔn)確。

1. When laying, it shall be in a straight line close to the PE pipe and be located on the top surface of the pipe. Do not bury the PE pipe in spiral shape, which may lead to inaccurate test results.

2、人孔處或地外的示蹤線(xiàn)應(yīng)預(yù)留一定長(zhǎng)度的導(dǎo)線(xiàn)（1m以上為宜），用于信號(hào)的檢測(cè)和應(yīng)用。這可以提高檢測(cè)效率和準(zhǔn)確性。

2. A certain length of conductor (more than 1m) shall be reserved for the tracer line at the manhole or outside the ground for signal detection and application. This can improve the detection efficiency and accuracy.

3、示蹤線(xiàn)接頭或分支點(diǎn)必須連接牢固，保持良好的導(dǎo)電性，并用絕緣膠帶包裹，以防地下潮濕造成腐蝕和斷線(xiàn)，中斷檢測(cè)信號(hào)。管道鋼塑轉(zhuǎn)換接頭處的示蹤線(xiàn)可焊接在法蘭上，接頭處應(yīng)進(jìn)行防腐處理，以防長(zhǎng)時(shí)間腐蝕而斷開(kāi)。

3. The tracer line joint or branch point must be firmly connected to maintain good conductivity and wrapped with insulating tape to prevent corrosion and disconnection caused by underground moisture and interrupt the detection signal. The tracer 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 disconnection due to long-term corrosion.

4、為了增加示蹤線(xiàn)的信號(hào)強(qiáng)度，使信號(hào)分布均勻，施工時(shí)必須盡量減小示蹤線(xiàn)埋地端的接地電阻，并做好剝?nèi)ネ馄さ慕拥卮胧?。外露芯線(xiàn)的絕緣層應(yīng)取30cm。尤其是長(zhǎng)度較短的支管末端，一定要做好接地，否則支管上的信號(hào)會(huì)很微弱，檢測(cè)不到。

4. In order to increase the signal strength of the tracer line and make the signal distribution uniform, the grounding resistance at the buried end of the tracer line must be reduced as much as possible during construction, and the grounding measures of peeling off the skin shall be taken. The insulation layer of exposed core wire shall be 30cm. In particular, the end of the branch pipe with short length must be well grounded, otherwise the signal on the branch pipe will be very weak and can not be detected.

5、如果管道埋設(shè)長(zhǎng)度超過(guò)1km，且中間沒(méi)有人孔等設(shè)施預(yù)留示蹤頭以滿(mǎn)足檢測(cè)需要，建議每設(shè)置一個(gè)試驗(yàn)樁，預(yù)留示蹤劑聯(lián)合檢測(cè)。

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

6、非開(kāi)挖工程施工中，PE管道外的示蹤線(xiàn)在拖管過(guò)程中容易被扯斷。簡(jiǎn)單的方法是選擇截面積更大、強(qiáng)度更高的鋼絲或鋼絲繩，或者在管道內(nèi)部使用。預(yù)穿示蹤線(xiàn)可以避免斷線(xiàn)，檢測(cè)效果和外面一樣，但是這樣做的時(shí)候需要處理好內(nèi)示蹤線(xiàn)和外示蹤線(xiàn)的連接。

6. During the construction of trenchless engineering, the tracer line outside the PE pipe is easy to be broken during the pipe dragging process. The simple method is to select steel wire or wire rope with larger cross-sectional area and higher strength, or use it inside the pipeline. Pre threading the tracer line can avoid disconnection, and the detection effect is the same as that of the outside, but the connection between the inner tracer line and the outer tracer line needs to be handled well.

7、在某些特殊情況下，燃?xì)馐聚櫨€(xiàn)不能應(yīng)用于PE管道。這時(shí)可以采用預(yù)埋示蹤球的方法來(lái)滿(mǎn)足未來(lái)檢測(cè)定位的需要。

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

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