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This paper takes the caisson construction of the Nanmewan Power Tunnel Project as the background, and combines numerical simulation and on-site monitoring to study the effect of rotary jet grouting pile reinforcement on controlling the surface settlement of the surrounding area. The results show that after reinforcement, the maximum settlement caused by the subsidence of the first section of the caisson is reduced by 40.2%, and it is reduced by 61.8% after the entire subsidence. The soil settlement in the reinforced area is distributed in a spoon-shaped pattern, while the unreinforced soil still shows a parabolic distribution. Rotary jet grouting pile reinforcement can effectively suppress the surface settlement caused by caisson construction.

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Numerical Simulation Study on Ground Settlement Induced by Caisson Construction in Soft Soil Stratum

  • 会议论文

  • 发表日期：

    2026年

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  • Tao Deng,
  • Shangchun Liu,
  • Ailin Huang,
  • Xinhua Jiang,
  • Zhihu Xiang,
  • Kan Huang

摘要

This paper takes the caisson construction of the Nanmewan Power Tunnel Project as the background, and combines numerical simulation and on-site monitoring to study the effect of rotary jet grouting pile reinforcement on controlling the surface settlement of the surrounding area. The results show that after reinforcement, the maximum settlement caused by the subsidence of the first section of the caisson is reduced by 40.2%, and it is reduced by 61.8% after the entire subsidence. The soil settlement in the reinforced area is distributed in a spoon-shaped pattern, while the unreinforced soil still shows a parabolic distribution. Rotary jet grouting pile reinforcement can effectively suppress the surface settlement caused by caisson construction.