The compaction standards of high-speed railway subgrade filling materials is mainly controlled by indexes such as compaction coefficient,subgrade modulus,and dynamic deformation modulus.Testing the internal control indicators of existing subgrades effectively can be challenging without causing damage to the subgrade itself.To assess the compaction quality of fillers within the subgrade of an overseas project,while minimizing disruption and damage to the current subgrade,a fitting relation was established to relate the number of hammer blows from the Dynamic Penetration Test(DPT)to the directly measured compaction parameters compaction coefficient,subgrade modulus,and dynamic deformation modulus within a test section.This fitting relation was then used for a comprehensive evaluation of the internal compaction across the project's entire subgrade.The findings indicate that the use of this fitting relation prevents harm to the existing subgrade,reduces construction time,and delivers significant economic advantages.
NETL
NSTL
维普
万方数据
