斜逆断层作用下的油气管道应变极值表征方法

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关键词：斜逆断层；油气管道；大应变；监测；有限元仿真

中图分类号：TE88

DOI：10.3969/j.issn.1004-132X.2025.11.039

Abstract：Long-distance pipelines were more susceptible to significant deformation under the influences of oblique reverse faults，and their strain extremums were dificult to accurately characterize，making it challenging to reflect theactual deformation states of the pipelines.To address this issue，a strain extremum characterization method for pipelines was proposed based on strain sensor monitoring to enhance the accuracy and early warning capability of buried long-distance pipeline strain monitoring. A pipe-soil coupling finite element model was established to analyze the deformation behavior of pipelines under oblique reverse faults，and the accuracy of the model was validated. Then，a high-precision tensile and compressive strain extremum characterization model was constructed using Stacking ensemble learning. Finally，a pipeline strain dataset was established，the strain data from the 3，9 and 12 o'clock positions along the pipelines within 2O times the pipe diameter on both sides the fault was utilized to train the model.This model accurately fits the strain characteristics of the pipelines under multidimensional nonlinear conditions，effectively capturing stress concentration and deformation paterns induced by oblique reverse faults. The results show that the proposed strain extremum characterization method may precisely reflect the maximum tensile and compressive strains of pipelines under oblique reverse faults， providing significant engineering value for pipeline deformation monitoring and early warning systems.

Key words ： oblique reverse fault;oil and gas pipeline;large strain;monitoring;finite element simulation

0 引言

用于长距离运输的油气管道常需面临地震、断层、滑坡、冻土及采空区等复杂地质环境，安全风险显著。（剩余13193字）