摘要
针对黄泛区路基土特殊的工程特性,文中通过自主研发的大型一维土柱压缩试验系统,系统研究了不同压实度土体在分级加卸载条件下的沉降特性。研究结果表明,压实度对土体压缩变形具有显著影响,提高压实度可有效增强土体结构稳定性。沉降量沿深度呈非线性衰减分布,主要集中于路基上部1/3深度范围内。加卸载循环使土体表现出明显的硬化特征,初次压缩形成的稳定结构使后续变形量显著减小。研究结果为黄泛区高速公路路基设计与施工质量控制提供了理论依据,建议工程实践中采用适当提高压实标准和预压处理等措施,以控制工后沉降。
Focusing on the distinctive engineering characteristics of subgrade soils in the Huangfan area,this study systematically investigates the settlement behavior of soils with different compaction levels under staged loading and unloading using a self-developed large-scale one-dimensional soil column compression testing system.The results indicate that compaction significantly influences soil compressibility,and increasing compaction effectively enhanc-es soil structural stability.Settlement decreases nonlinearly with depth,primarily concentrated within the upper one-third of the subgrade.Cyclic loading and unloading induce pronounced hardening behavior,as the stable struc-ture formed during initial compression substantially reduces subsequent deformations.These findings provide a theo-retical basis for the design and construction quality control of expressway subgrades in the Huangfan area,and sug-gest that engineering practices should adopt measures such as increasing compaction standards and preloading treat-ments to control post-construction settlement.
作者
刘永
魏道凯
吕厚擎
LIU Yong;WEI Daokai;LYU Houqing(Heze Urban Construction Group,Shandong Heze 274000,China;Shandong Transport Vocational College,Shandong Weifang 261206,China)
出处
《低温建筑技术》
2025年第9期130-133,138,共5页
Low Temperature Architecture Technology
关键词
路基土
压实度
加卸载循环
沉降特性
一维压缩试验
subgrade soils
compaction effects
cyclic loading-unloading
settlement behavior
1D compression testing
