软土地区道路土壤固化剂关键影响因素研究

Study on Key Influencing Factors of Soil Stabilizer for Roads in Soft Soil Areas

摘要:

为推广土壤固化剂在软土地区道路路基工程中的应用，以路邦-1离子型固化剂为研究对象，选取重载交通基础设施道路现场土为试验材料，系统开展压实度、龄期、含水量、石灰含量对固化土无侧限抗压强度影响的室内对比试验。结果表明：固化土无侧限抗压强度与压实度呈显著线性正相关，随养护龄期增长持续提升，石灰+固化剂体系后期强度增长尤为突出；含水量约18.0%时强度达峰值，与规范要求含水量控制区间一致；石灰含量在3%~13%范围内强度整体递增，低于6%时增幅显著，高于6%后增幅趋缓。研究成果可为软土地区道路路基与基层固化设计、施工控制及配比优化提供试验依据与技术参考。

Abstract:

To promote the application of soil stabilizers in road subgrade engineering of soft soil areas, taking Lubond-1 ionic soil stabilizer as the research object, and selecting the in-situ soil from heavy-duty transportation infrastructure roads as the test material, the laboratory tests are systematically conducted to compare the influences of compaction degree, curing age, moisture content and lime content on the unconfined compressive strength of stabilized soil. The results show that the unconfined compressive strength of stabilized soil has a significant linear positive correlation with compaction degree, and increases continuously with the growth of curing age. The strength growth of the lime + stabilizer composite system is particularly prominent in the later stage. The strength reaches the peak when the moisture content is about 18.0%, which is consistent with the moisture control range required by the specification. The strength increases overall when the lime content ranges from 3% to 13%, with a significant increase rate below 6% and a slow increase rate above 6%. The research results can provide experimental basis and technical reference for the stabilization design, construction control and mix ratio optimization of road subgrades and bases in soft soil areas.