CAJ | 학술논문

由于黄土具有湿陷性，黄土地区工程建设往往需要对地基进行处理。石灰作为一种凝胶材料，是一种很好的地基加固材料。在浸水饱和和未浸水两种状态下分别对掺灰比3%，5%，7%，9%和15%的改良黄土进行固结试验，分析石灰不同掺量对改良黄土性能的影响。试验结果表明：随着石灰掺量的增加，改良黄土的压缩系数先降低后升高，渗透系数先减小后增大，掺灰比为7%时压缩系数和渗透系数均降到最低；石灰改善黄土湿陷性效果明显，掺灰比7%的改良黄土湿陷性系数最小，基本不发生湿陷；石灰的掺入能有效改善黄土的性能，且石灰掺量7%时改良黄土各项性能得到最大改善，故最佳掺灰比为7%。
유우황토구유습함성，황토지구공정건설왕왕수요대지기진행처리。석회작위일충응효재료，시일충흔호적지기가고재료。재침수포화화미침수량충상태하분별대참회비3%，5%，7%，9%화15%적개량황토진행고결시험，분석석회불동참량대개량황토성능적영향。시험결과표명：수착석회참량적증가，개량황토적압축계수선강저후승고，삼투계수선감소후증대，참회비위7%시압축계수화삼투계수균강도최저；석회개선황토습함성효과명현，참회비7%적개량황토습함성계수최소，기본불발생습함；석회적참입능유효개선황토적성능，차석회참량7%시개량황토각항성능득도최대개선，고최가참회비위7%。
Due to the collapsibility of loess,the foundation often needs to be improved in loess region engineering construction. As a kind of gel material,lime is very useful for foundation reinforcement. This paper conducted the consolidation test of saturated and unsaturated improved loess ( samples) with lime mixed ratio of 3%,5%,7%,9% and 15% respectively and analyzed the effect of different lime ratio on improved loess characteristics. Experiment results showed that compressibility coefficient of improved loess first decreases and then increases,and the permeability coefficient decreases first and then increases with lime ratio increasing,the compressibility coefficient and permeability coefficient is minimum when the lime ratio is 7%,collapsibility effect of lime improved-loess is obvious and the collapsibility coefficient is minimum when the lime ratio is 7% with little collapsing,the loess characteristics could be improved effectively with lime mixing and the all indices of improved loess characteristics are maximal when the lime ratio is 7%,which means the optimal lime ratio is 7%.