<p>Intelligent compaction employs intelligent compaction measurement values (ICMVs) to assess the compaction quality in real time. Current engineering practices rely on a single harmonic ratio ICMV to evaluate the entire compaction process, overlooking variations in construction conditions. This paper introduces a hybrid-driven optimization approach to select the appropriate ICMV for subgrade compaction, based on the proposed multi-domain ICMV system. A series of heterogeneous scenario compaction tests are performed. The ICMV is refined by considering the compaction stage, filling soil gradation, and roller control parameters using mathematics and AI correlation model. The frequency-domain ICMVs are sensitive to roller vibration forces and are not recommended for construction sites with multiple or aged rollers. The influence of particle size is less pronounced. Considering the dynamic variation mechanism of the subgrade, it is recommended that the ICMV be changed for the third rolling pass. The proposed method effectively enhances the evaluation accuracy and efficiency in field validations.</p>

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Hybrid-driven optimization of subgrade intelligent compaction measurement value combining mathematics and AI model

  • Xuefei Wang,
  • Wei Lu,
  • Rui Wang,
  • Jianmin Zhang,
  • Guowei Ma

摘要

Intelligent compaction employs intelligent compaction measurement values (ICMVs) to assess the compaction quality in real time. Current engineering practices rely on a single harmonic ratio ICMV to evaluate the entire compaction process, overlooking variations in construction conditions. This paper introduces a hybrid-driven optimization approach to select the appropriate ICMV for subgrade compaction, based on the proposed multi-domain ICMV system. A series of heterogeneous scenario compaction tests are performed. The ICMV is refined by considering the compaction stage, filling soil gradation, and roller control parameters using mathematics and AI correlation model. The frequency-domain ICMVs are sensitive to roller vibration forces and are not recommended for construction sites with multiple or aged rollers. The influence of particle size is less pronounced. Considering the dynamic variation mechanism of the subgrade, it is recommended that the ICMV be changed for the third rolling pass. The proposed method effectively enhances the evaluation accuracy and efficiency in field validations.