1. Ground signs

Mark the corresponding positions on the ground and embed signs, sign bricks, sign stickers, etc. This method is intuitive and easy to find, but it is limited by the ground environment, for example, it is difficult to set up on fast roads. In the case of road maintenance or demolition, a large number of signs will be lost. At this stage, the above signs are used for ground marks.

2. Equipment inspection

Once the ground signs are lost, the equipment must be used for underground pipeline detection. For metal pipes, metal pipe detectors (a device that applies an electrical signal to the pipe and then tracks the direction of the electrical signal) are generally used for wiring and positioning. This equipment works well in places with few underground pipelines and no strong magnetic and electric fields, but for places with dense pipelines (such as courtyards) or pipelines with poor conductivity (such as ductile iron pipes), the detection efficiency will be greatly improved and reduced.

PE pipe is not conductive at all, so this technology cannot be used. We have also tried other equipment, such as geomagnetic imager and underground cave detector, but they have not been put into practical application in Bazhou company, and the effect cannot be determined temporarily. In addition, it is understood that there is no equipment on the market that can achieve the desired effect when detecting PE pipes.

3. Metal film tracer tape

Lay a metal film tracking tape over the PE pipe, and then probe it with a probe. The metal film in the tracer band has conductivity, which can theoretically reflect the characteristics of the metal pipe, but in fact, because the cross-sectional area of the metal film is too small, the conductivity is not good, and it is greatly disturbed by the surrounding metal pipes, resulting in poor detection effect. It can only be detected where the interference is very small and close to the ground. Moreover, in the process of radiation, it needs to be connected every 100 meters. If the connection is improper, the tracer belt will break due to soil settlement during later use, so it cannot be detected.

4. Metal tracer

In order to improve the conductivity of the tracer, we use metal tracer wire instead of metal film tracer strip. Because the core wire of the tracer wire is copper and has a certain cross-sectional area, its conductivity is obviously better than that of the thin-film tracer belt, especially when it is just buried underground, the detection effect is better. But with the passage of time, the tracer wire exposed a big problem.

Once there is a breakpoint in the tracer wire, such as being cut off during construction, natural corrosion, weak connection during connection, etc., it cannot be detected from the breakpoint. Bay. Compared with other underground pipelines or lines, the conductivity of the tracer wire is not as good as them, so the detection signal is too weak, thus confusing the location of the pipeline. In addition, due to poor tensile strength, it cannot be laid during directional drilling.

5. Abandoned communication optical cable

In view of the shortcomings of metal tracers, abandoned communication optical cables can better solve this problem. Communication optical cable is composed of optical cable core and outer sheath composed of multiple (core) optical fibers (usually from several cores to thousands of cores). There are reinforcements in the optical cable to bear external mechanical loads, so as to protect the optical fiber from various external mechanical forces, so as to ensure the durability of the optical cable.

Especially in the directional drilling construction, the strong bearing capacity of optical cables can ensure the complete laying. Every 300 to 500 meters, the detection pile shall be buried, and the optical cable shall be led to the detection pile to facilitate the detection and positioning in the future. The disadvantage of optical cables is that the conductivity is lower than that of metal tracers, and the detection effect of disturbed areas is poor.

6. Underground pipeline electronic sign system

The manufacturer of buried tracer wire believes that its working principle is that electronic marks are buried above the pipeline, and each electronic mark has an identification code, which is the same as everyone's ID number. Important information of the pipeline can be customized and stored in the electronic marker, such as relative position, buried depth, pipe diameter, pipeline material, pipeline pressure, laying date, etc. Use the ground positioning equipment (detector) to locate the position of the electronic mark and read the stored information.

The above is all about the problems and precautions introduced to you today. I hope it can help you. If you want to know more, you can contact us by phone or follow our website http://webtest2.daoshangbao.cn , our staff will contact you in time.