示蹤線(xiàn)法是解決PE管道定位探測問(wèn)題的普遍方法，可以從示蹤線(xiàn)的選材、施工工藝、探測技術(shù)以及現場(chǎng)實(shí)際使用情況等方面進(jìn)行了討論。下面地埋示蹤線(xiàn)廠(chǎng)家來(lái)為您講解下地埋示蹤線(xiàn)使用時(shí)的探測技術(shù)。

Tracer line method is a common method to solve the problem of PE pipeline positioning and detection, which can be discussed from the aspects of material selection, construction technology, detection technology and on-site actual use of the tracer line. The following manufacturers of buried trace wires will explain the detection technology when they are used.

1、探測示蹤線(xiàn)的方法為直連法,它信噪比高、干擾少、易探測,探測結果比較準確可靠。

1. The direct connection method is used to detect the trace line, which has high signal-to-noise ratio, less interference, easy detection, and accurate and reliable detection results.

2、市區內的PE管道示蹤線(xiàn)不宜選用感應法探測。城市區域內的管線(xiàn)密集,而示蹤線(xiàn)相對細小,其接地回路電阻一般情況下比其它管線(xiàn)大很多,因此產(chǎn)生的感應電流信號往往要比非目標管線(xiàn)弱很多,示蹤線(xiàn)信號容易被掩蓋而造成誤測。

2. The tracing line of PE pipeline in urban area should not be detected by induction method. The pipelines in urban areas are dense, while the trace lines are relatively small, and the resistance of the grounding circuit is generally much larger than that of other pipelines, so the induced current signal generated is often much weaker than that of non target pipelines, and the trace line signal is easy to be covered up, causing false measurement.

3、在探測短分支管道示蹤線(xiàn)時(shí),施加信號點(diǎn)宜選擇分支示蹤線(xiàn)的末端(即測試樁處),這樣分支示蹤線(xiàn)上的信號強,不會(huì )漏測分支點(diǎn)。

3. When detecting the trace line of short branch pipeline, the end of the branch trace line (i.e. the test pile) should be selected as the signal application point, so that the signal strength on the branch trace line will not miss the branch point.

4、用直連法探測示蹤線(xiàn)時(shí),盡量選擇較低的工作頻率,發(fā)射機的接地線(xiàn)也盡量不要跨接其它管線(xiàn),以減少信號感應或串擾到其它管線(xiàn)。

4. When using the direct connection method to detect the trace line, try to select a lower working frequency, and try not to cross connect the ground wire of the transmitter to other pipelines to reduce signal induction or crosstalk to other pipelines.

5、探測時(shí)應根據實(shí)際情況,改變供電點(diǎn)位置后再重復探測,檢查兩次探測結果的吻合情況,以提高探測的準確性和精度。

5. During the detection, the power supply point shall be changed according to the actual situation and then the detection shall be repeated to check the coincidence of the two detection results, so as to improve the accuracy and precision of the detection.

6、對于定向鉆方式鋪設的PE管道,由于示蹤線(xiàn)的埋深較大(可能大于5m),除選擇較低的工作頻率以減少電磁場(chǎng)感應到其它管線(xiàn)上,還應盡量設法改善接地條件,增加示蹤線(xiàn)上的供電電流,提高信噪比,這樣可獲得較好的探測效果。

6. For the PE pipeline laid by directional drilling, because the buried depth of the tracer line is large (may be greater than 5m), in addition to selecting a lower working frequency to reduce electromagnetic field induction to other pipelines, try to improve the grounding conditions, increase the power supply current on the tracer line, and improve the signal-to-noise ratio, so as to obtain better detection effect.

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