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Corresponding Author

周栩佳, 男, 硕士研究生. E-mail: 1040925200@qq.com

Abstract

To investigate the utilization technology and compaction quality control of hardened layers in the beam yard of rock-filled roadbed,the optimization design and construction control methods for rock-filled roadbed under different conditions were proposed based on a highway project in Guangdong Province.When the elevation of the hardened layer was lower than the top surface elevation of the roadbed and the top surface bending and settlement value of the hardened layer was less than that of the rock-filled roadbed,the gravel material could be filled directly on the hardened layer to the top surface elevation of the roadbed,and acceptance and pavement design could be conducted according to the rock-filled roadbed with rigid sandwich.When the elevation of the hardened layer reached the elevation of the roadbed and the top surface bending and settlement value of the hardened layer was less than that of the rock-filled roadbed,the hardened layer can be used directly.The compaction quality of the roadbed under different construction and compaction schemes was analyzed based on the test section.The results show that the compaction process under strong vibration followed by weak vibration is better,and the settlement is basically in a stable state after five rolling passes with a 26 t roller.The empirical formula for the number of hammer blows and porosity was established based on heavy-duty power tapping.The rapid detection technology of compaction quality can be used for rapidly detecting compaction quality.The elevation of the top surface of the hardened layer in the beam yard of the physical project was remeasured,and the backcalculation study of the modulus of the hardened layer under different elevations was carried out.The rebound modulus of the hardened layer in the beam yard was jointly tested by the portable falling weight deflectometer (PFWD ) and the Beckman beam (BB) method.It is found that the backcalculation results of the PFWD and BB methods are significantly correlated.The backcalculation results can comprehensively evaluate the mechanical properties of the hardened layer in the beam yard and provide a parameter basis for the optimization of the pavement overlay structure.

Publication Date

12-24-2025

DOI

10.14048/j.issn.1671-2579.2025.06.004

First Page

25

Last Page

35

Submission Date

December 2025

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