土石混填路基压实质量控制方法研究

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关键词：土石混填路基；FLAC3D模量变化法；压实沉降；抗剪强度

中图分类号：U415.1 文献标志码：A 文章编号：1003-5168(2025)11-0074-05

DOI:10.19968/j.cnki.hnkj.1003-5168.2025.11.016

A Study on Compaction Quality Control Methods for Rock-Soil Mixed Subgrades

QU Yanfen (Xinxiang Founder Highway Engineering Supervision Consulting Co.,Ltd., Xinxiang 453ooo, China）

Abstract: [Purposes] To address issues such as post-construction settlement induced by the difficulty in controlling compaction quality of soil-rock mixture subgrades,this study employs FLAC 3D simulation software to establish a compaction quality model for soil-rock mixed subgrades.Through numerical simulation calculations.The control methods for enhancing the stability of soil-rock mixture subgrades are analyzed.[Methods] By incorporating a random aggregate generation program, multiple soil-rock mixed subgrade models are developed.Through simulating the compaction process,the correlation between compaction-induced settlement and compaction degree was discussed,and compaction quality control methods were proposed from both single-layer and multi-layer perspectives.[Findings] The results demonstrate that soil-rock mixture subgrades exhibit over 50% improvement in strength and stability compared to homogeneous soil subgrades.[Conclusions] Combined with practical engineering cases,the FLAC 3D simulation software has been validated for its rationality in analyzing compaction-induced settlement and compaction degree of soil-rock mixed subgrades,aligning with quality control specifications for road engineering construction.The research results can provide guidance and reference for relevant engineering practices.

Keywords:rock-soil mixed subgrade; FLAO 3D modulus change method; compact settlement； shear strength

0 引言

不同土石混合料因土体、石块含量、级配等条件因素不同，其抗压强度也存在差异，为后续路基施工带来潜在的不均匀沉降风险，从而影响道路整体平整度，甚至产生纵向、横向裂缝，严重降低道路工程建设质量。（剩余6697字）