Volume 39 Issue 2
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Lyu Bin, Fang Yanhong, Gong Haixia, Liu Yazhen, Chen Jian, Zhang Hongbo, Sun Zhaoyun. Reinforcement effect and construction process of rapid impact compaction for highway reconstruction and expansion[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(2): 254-263. doi: 10.20265/j.cnki.issn.1007-2993.2023-0902
Citation: Lyu Bin, Fang Yanhong, Gong Haixia, Liu Yazhen, Chen Jian, Zhang Hongbo, Sun Zhaoyun. Reinforcement effect and construction process of rapid impact compaction for highway reconstruction and expansion[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(2): 254-263. doi: 10.20265/j.cnki.issn.1007-2993.2023-0902
shu

Reinforcement effect and construction process of rapid impact compaction for highway reconstruction and expansion

doi: 10.20265/j.cnki.issn.1007-2993.2023-0902
  • 1.

    Qilu Expressway Company Limited, Jinan 250101, Shandong, China

  • 2.

    School of Qilu Transportation, Shandong University, Jinan 250002, Shandong, China

  • 3.

    Shandong Transportation Research Institute, Jinan 250102, Shandong, China

  • Received Date: 2023-12-06
  • Accepted Date: 2024-03-11
  • Rev Recd Date: 2024-01-24
    • Available Online: 2025-04-07
  • Publish Date: 2025-04-08
    Abstract
  • With the uncertainty in the technology of rapid impact compaction (RIC) for highway reconstruction and expansion, relying on the Ji-Guang Expressway project, the reinforcement effect and construction technology of RIC on loess foundations were studied by adjusting construction parameters such as compaction energy, compaction frequency, and compaction spacing. Meanwhile, the application effect and technical feasibility were verified. The study shows that the RIC can effectively improve the strength depth and compactness of the foundation. The compaction energy and frequency are the main construction parameters that affect the reinforcement effect. The reinforcement effect of the compacted soil shows a linear increase trend with the increase of compaction frequency and compaction energy. The lateral displacement of the soil after compaction shows a parabolic trend with depth, and reaches its peak at a burial depth of 3-4 meters under various compaction spacing conditions. The optimal spacing between compaction points for high-speed hydraulic compaction of loess foundation is 1.5 meters, with a maximum effective reinforcement depth of about 6 meters and a maximum effective reinforcement radius of about 1.6 meters. Based on comprehensive experimental data and theoretical analysis, a calculation formula for the reinforcement range of RIC treatment of loess foundation has been established.

     

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