A method for advanced geological prediction in composite stratum under pipe jacking construction

By deploying geophones in an array on the sidewall of the pipe jacking gallery and utilizing wave field processing technology, the problem of predicting the geological conditions ahead of the pipe jacking machine in complex strata was solved, enabling rapid and accurate adjustment of the construction plan and ensuring the safety and efficiency of tunnel construction.

CN116660993BActive Publication Date: 2026-06-02THE FIRST COMPARY OF CHINA EIGHTH ENG BUREAU LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
THE FIRST COMPARY OF CHINA EIGHTH ENG BUREAU LTD
Filing Date
2023-06-16
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In pipe jacking machines, especially in complex geological formations, existing advanced geological forecasting technologies are unable to effectively predict the geological conditions ahead, leading to increased construction risks. In particular, when there is a significant difference between soft and hard soil layers, it is impossible to adjust the pipe jacking machine parameters in real time, which affects the safety of tunnel construction.

Method used

A spatial array of geophones was deployed as monitoring points on the sidewall of the pipe jacking gallery. Wave field processing technology was used to separate reflected longitudinal and transverse waves, quickly identify adverse geological structures, and adjust the construction plan based on the results to ensure safe construction.

Benefits of technology

It enables rapid and accurate geological surveys, reduces construction time, improves the safety and efficiency of tunnel construction, and allows for data analysis and report writing to be completed in a short time.

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Abstract

This invention relates to the field of pipe jacking construction technology, specifically to an advanced geological prediction method used in pipe jacking construction under complex strata. The method involves geological surveying of the pipe jacking tunnel area, conducting preliminary surveys of the soil, and determining whether there are significant differences in soil hardness based on soil physical parameters. If such differences exist, the structural topography and adverse geological features within the pipe jacking tunnel area need to be predicted. Monitoring point deployment involves installing geophones on the sidewalls of the pipes in the pipe jacking tunnel. In this invention, geophones are deployed in a spatial array on the sidewalls of the pipe jacking tunnel, allowing for flexible data acquisition and adjustment of geophone positions based on site conditions. A total of [number missing] monitoring points were deployed. The advantages are: the HSP advanced geological prediction technology proposed in this invention for geological surveying of pipe jacking tunnels is fast, essentially not taking up construction time; data analysis after signal processing is rapid, and preliminary conclusions can be drawn immediately after measurement.
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