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As a common type of geohazard, landslides can cause permanent ground deformation (PGD) that poses a serious threat to underground pipelines. Controlled low strength material (CLSM) is a new type of backfill material, and exhibits the characteristics of self-leveling, self-compaction, and adjustable strength. It holds vast potential for applications in trench construction of pipelines. This study investigates the responses of pipelines backfilled with flowable fill materials of CLSM subjected to PGD caused by landslides. A theoretical analysis method is derived to analyze the influence of ground deformation on the pipe deflection and strain under different parameters, e.g., PGD zone width, pipe diameter, and internal friction angle of CLSM. The results indicate that CLSM backfilling can effectively mitigate the adverse effects of ground deformation on pipelines, thereby enhancing the stability and safety of pipelines.

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Assessing the Efficacy of Controlled Low Strength Material Backfills in Mitigating Landslide Effects on Pipelines

  • 会议论文

  • 发表日期：

    2026年

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  • Jianfeng Zuo,
  • Jiale Zhang,
  • Changliang Gao,
  • Hao Luo,
  • Chen Hao,
  • Mingge Ye,
  • Zhaoyang Yang

摘要

As a common type of geohazard, landslides can cause permanent ground deformation (PGD) that poses a serious threat to underground pipelines. Controlled low strength material (CLSM) is a new type of backfill material, and exhibits the characteristics of self-leveling, self-compaction, and adjustable strength. It holds vast potential for applications in trench construction of pipelines. This study investigates the responses of pipelines backfilled with flowable fill materials of CLSM subjected to PGD caused by landslides. A theoretical analysis method is derived to analyze the influence of ground deformation on the pipe deflection and strain under different parameters, e.g., PGD zone width, pipe diameter, and internal friction angle of CLSM. The results indicate that CLSM backfilling can effectively mitigate the adverse effects of ground deformation on pipelines, thereby enhancing the stability and safety of pipelines.