示蹤(zong)線(xian)鋪設(she)註意(yi)事項(xiang)

　　2、 Precautions for trace line laying

　　1、蹤(zong)線(xian)埋(mai)設(she)時應緊貼PE管道呈直線狀(zhuang)，並位(wei)於(yu)管道的頂(ding)面為好(hao)。請勿以(yi)螺(luo)旋(xuan)狀(zhuang)纏繞(rao)在(zai)PE管道上埋(mai)設(she)，這(zhe)樣(yang)易(yi)導致(zhi)探測結(jie)果不(bu)準(zhun)確(que)。

　　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(zai)窨井或出(chu)地(di)處(chu)示蹤(zong)線(xian)應該預留出壹定長(chang)度的(de)導(dao)線(xian)（1m以(yi)上為宜），供(gong)探測施(shi)加(jia)信(xin)號所用(yong)。這(zhe)樣(yang)可提髙(髙)探測效(xiao)率(lv)和(he)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(zong)線(xian)接(jie)頭(tou)或分(fen)支(zhi)點壹定要(yao)連接牢(lao)固(gu)，保持良(liang)好(hao)導電(dian),並(bing)用(yong)絕(jue)緣膠布包好(hao)，防止地(di)下(xia)潮濕而造(zao)成(cheng)腐(fu)蝕(shi)斷(duan)線情(qing)況(kuang)，使探測信(xin)號中斷(duan)。管道的鋼塑轉(zhuan)換(huan)接(jie)頭(tou)處示蹤(zong)線(xian)可以(yi)焊接在(zai)法(fa)蘭(lan)上，接(jie)點處(chu)做好(hao)防腐(fu)處(chu)理，防止日久(jiu)後腐(fu)蝕(shi)斷(duan)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(zeng)加示蹤(zong)線(xian)的(de)信(xin)號強(qiang)度(du)並讓(rang)信(xin)號分(fen)布均勻(yun)，施(shi)工(gong)時須盡(jin)量(liang)減(jian)小(xiao)示蹤(zong)線(xian)埋(mai)地(di)末(mo)端(duan)的接地(di)電(dian)阻(zu)，采取剝掉(diao)絕(jue)緣層裸露芯(xin)線30cm的(de)良(liang)好(hao)接地(di)措(cuo)施(shi)。特(te)別(bie)是(shi)對(dui)於(yu)長(chang)度較短(duan)的分(fen)支(zhi)管的末(mo)端(duan)，壹定要(yao)接地(di)良(liang)好(hao)，否(fou)則(ze)分(fen)支(zhi)上(shang)的(de)信(xin)號會(hui)非(fei)常(chang)弱(ruo)而(er)探測不(bu)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.

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