Detection system and method for determining spatial position information of underground deeply-buried pipeline

Abstract

The invention relates to a detection system and method for determining spatial position information of an underground deeply-buried pipeline. The detection system utilizes an artificial seismic source or a mechanical seismic source to excite an elastic wave signal to the deeply-buried pipeline; an observation hole is formed in the range of 2-5 m beside the far end of the estimated deeply-buried pipeline; a plurality of detectors which are arranged at equal intervals are placed in the observation holes, and the plurality of detectors are connected with corresponding seismographs respectively. According to the detection method, an in-hole detector is adopted to receive an elastic wave signal from a target pipeline, the first arrival time of the detector signal is analyzed through a multi-channel seismograph, the burying depth of the pipeline and the distance between the pipeline and an observation hole are calculated, and then the spatial position of the deeply-buried pipeline is determined. The method can be suitable for spatial position detection of underground metal pipelines and nonmetal pipelines with various burying depths, the detection means is simple and practical, the detection result is accurate and reliable, and no damage is caused to the target pipeline.

Description

technical field [0001] The invention relates to the field of underground pipeline detection, in particular to a detection system and method capable of rapidly determining spatial position information of underground deep-buried pipelines, and the method is applicable to metal pipelines and non-metal pipelines. Background technique [0002] With the development of the city, the laying of underground pipelines is becoming more and more dense. Due to the limitation of underground space, most of the newly laid underground pipelines adopt non-excavation construction when crossing roads, especially when crossing buildings, rivers and other areas, the depth of pipelines can reach 20-40 Meter. At present, the existing pipeline detectors are all based on the principle of frequency domain electromagnetic method to detect metal pipelines, which are greatly affected by the resistivity of the formation medium. In areas with low formation resistivity, the general ground detection depth ran...

AI Technical Summary

Problems solved by technology

At present, the existing pipeline detectors are all based on the principle of frequency domain electromagnetic method to detect metal pipelines, which are greatly affected by the resistivity of the formation medium. In areas with low formation resistivity, the general ground detection depth range is only about 5 meters, which cannot be detected. Spatial location information of deeply buried pipelines at a deeper range; for non-metallic pipelines, the ground detection depth is more limited

However, when the exact location of such pipelines is uncertain, it will have a huge impact on the construction of other underground crossing projects or the utilization and development of underground space

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