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<p>Stress and deformation analysis is crucial when constructing a new sheet pile wall on an existing embankment slope. This study uses the Zhongwei–Lanzhou high-speed railway project to investigate the earth pressure, bending moment, and displacement of both the newly-built sheet pile wall and the existing cantilever retaining wall by using monitoring data. Results reveal that the earth pressure on the back side of the sheet pile wall and the resultant force increase with the distance from the pile top during construction and operation stages. The distance between the resultant force action point and the ground line increases first and then stabilizes. Earth pressure on the sheet pile wall adjacent to the cantilever retaining wall rises, falls, and rises again. The bending moment first increases and then decreases with the distance from the new pile top. The maximum bending moment of the pile is 3220.618&#xa0;kN·m. Pile displacement decreases with distance from the new pile top, and the maximum displacement of pile top (10.843&#xa0;mm) meets specified requirements. The existing cantilever retaining wall undergoes overall lateral deformation and minor rotational displacement. By fitting the measured data, the internal force of the new retaining wall is studied when considering the synergistic force of the existing retaining wall.</p>

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Field Monitoring of a Composite Retaining Structure: New Sheet Pile Wall with Existing Embankment Cantilever Wall

  • 期刊论文

  • 发表日期：

    2025年10月31日

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  • Wenhui Zhao,
  • Xueli Liu,
  • Jinjiang Xu,
  • Ke Zhang

摘要

Stress and deformation analysis is crucial when constructing a new sheet pile wall on an existing embankment slope. This study uses the Zhongwei–Lanzhou high-speed railway project to investigate the earth pressure, bending moment, and displacement of both the newly-built sheet pile wall and the existing cantilever retaining wall by using monitoring data. Results reveal that the earth pressure on the back side of the sheet pile wall and the resultant force increase with the distance from the pile top during construction and operation stages. The distance between the resultant force action point and the ground line increases first and then stabilizes. Earth pressure on the sheet pile wall adjacent to the cantilever retaining wall rises, falls, and rises again. The bending moment first increases and then decreases with the distance from the new pile top. The maximum bending moment of the pile is 3220.618 kN·m. Pile displacement decreases with distance from the new pile top, and the maximum displacement of pile top (10.843 mm) meets specified requirements. The existing cantilever retaining wall undergoes overall lateral deformation and minor rotational displacement. By fitting the measured data, the internal force of the new retaining wall is studied when considering the synergistic force of the existing retaining wall.