Numerical simulation of intelligent compaction for subgrade construction

来源期刊:中南大学学报(英文版)2020年第7期

论文作者:张伟光 马源 栾英成 张裕卿

文章页码:2173 - 2184

Key words:intelligent compaction; numerical simulation; dynamic change; control indicators; orthogonal experiment

Abstract: During the compaction of a road subgrade, the mechanical parameters of the soil mass change in real time, but current research assumes that these parameters remain unchanged. In order to address this discrepancy, this paper establishes a relationship between the degree of compaction K and strain ε. The relationship between the compaction degree K and the shear strength of soil (cohesion c and frictional angle φ) was clearly established through indoor experiments. The subroutine UMAT in ABAQUS finite element numerical software was developed to realize an accurate calculation of the subgrade soil compaction quality. This value was compared and analyzed against the assumed compaction value of the model, thereby verifying the accuracy of the intelligent compaction calculation results for subgrade soil. On this basis, orthogonal tests of the influential factors (frequency, amplitude, and quality) for the degree of compaction and sensitivity analysis were carried out. Finally, the ‘acceleration intelligent compaction value’, which is based on the acceleration signal, is proposed for a compaction meter value that indicates poor accuracy. The research results can provide guidance and basis for further research into the accurate control of compaction quality for roadbeds and pavements.

Cite this article as: MA Yuan, LUAN Ying-cheng, ZHANG Wei-guang, ZHANG Yu-qing. Numerical simulation of intelligent compaction for subgrade construction [J]. Journal of Central South University, 2020, 27(7): 2173-2184. DOI: https://doi.org/10.1007/s11771-020-4439-2.

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