CAJ | 학술논문

针对攀西地区昔格达土结构颗粒分散、凝聚力小、抗剪强度低、遇水易膨胀软化等不利工程性质，在昔格达土中加入不同配合比的石灰，通过界限含水率试验、击实试验、三轴试验，探究对昔格达土的塑液限、最大干密度、最优含水率、抗剪强度指标的改性效果，并结合工程实际分析了该掺石灰高回填昔格达土边坡多年的使用状况。通过试验发现，随着掺灰量的增加，灰土的塑液限增大，塑限指标减小，最优含水率增大，最大干密度减小，凝聚力和内摩擦角先增加后减小。最后得出结论，石灰土抗剪强度最大值的灰土最佳配合比约为3∶7。
침대반서지구석격체토결구과립분산、응취력소、항전강도저、우수역팽창연화등불리공정성질，재석격체토중가입불동배합비적석회，통과계한함수솔시험、격실시험、삼축시험，탐구대석격체토적소액한、최대간밀도、최우함수솔、항전강도지표적개성효과，병결합공정실제분석료해참석회고회전석격체토변파다년적사용상황。통과시험발현，수착참회량적증가，회토적소액한증대，소한지표감소，최우함수솔증대，최대간밀도감소，응취력화내마찰각선증가후감소。최후득출결론，석회토항전강도최대치적회토최가배합비약위3∶7。
Aiming at Panxi area Xigeda soil with negative engineering properties ,such as structure particles dispersed , small cohe-sion, low shear strength and encountering water expansion softening , by adding different contents of lime in Xigeda soil , through boundary moisture test , compaction test and triaxial test , the authors explore the effect of it on plastic liquid limit , maximum dry densi-ty, optimum moisture content and shear strength index modification .Then the practical engineering under the condition of the perennial rainwater role is analyzed .It is found that lime soil plastic liquid limit increases with the increase in the amount of mixing lime ,and plastic limit index decreases , the optimum moisture content increases , the maximum dry density decreases , cohesion and internal fric-tion angle first increases and then decreases .Finally, it is concluded that the best ratio of fitting the dust limestone soil with maximum shear strength is about 3∶7.