Difficult pipeline positioning

Underground pipeline detection method

In actual underground pipeline detection, the following methods can be used:

1. Field investigation: Analyze existing survey drawings and other data, and infer the pipeline direction and burial depth based on the information of obvious points

Inertial positioning method: for challenging areas such as deep burial, crossing rivers, non-metallic structures, and large obstacles that can be measured inside pipelines

Lower the pipeline and use inertial navigation technology to obtain accurate and reliable three-dimensional positioning information of the pipeline

2. Ground penetrating radar method: detecting non-metallic pipelines that cannot be measured inside the pipeline, using the reflection of high-frequency electromagnetic waves to obtain pipeline signals

rest

3. Needle probing method: For pipelines that cannot be measured inside the pipeline and can be directly penetrated to the pipeline position, mechanical probes are used to detect and record the location

Sexual information.

4. Excavation verification method: In difficult areas, excavation is used to expose pipelines in order to obtain or verify accurate attribute information