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STUDY ON PHYSICOMECHANICAL PROPERTIES AND MICROSTRUCTURE OF SWAMP SOIL
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摘要: 对东北三江平原的两种典型沼泽土和北京翠湖一种湿地土进行一系列物理力学性质和微观结构的试验研究。结果表明:三种土分别对应的物理性质试验、微观结构试验和力学性质试验得出的规律是一致的。沼泽白土与翠湖湿地土性质比较接近,但沼泽黑土含水量、液性指数、孔隙比、烧失率和压缩性等极高,干密度极低,孔隙体积、孔隙大小和固结变形等远远大于翠湖湿地土和沼泽白土。沼泽黑土抗剪强度最小,三种土所得凝聚力c值都很小,不超过0.5 kPa。沼泽黑土的各项指标明显比较特殊。研究结果丰富了已有软土研究成果,可为沼泽地区的工程建设提供参考。Abstract: Two typical swamp soils in Sanjiang Plain,Northeast China are studied through physical,mechanical and microstructure tests.Another wetland soil in Cuihu,Beijing is used to compare with the swamp soil.Test results show that moisture content,liquidity index,void ratio,void volume,void number and consolidation deformation of the black swamp soil are far more than that of the white swamp soil and the wetland soil.The shear strength of the black swamp soil is the least among three soils that are all less than 0.5 kPa of the c values.The properties of the white swamp soil are near to that of the wetland soil.But the indexes of the black swamp soil are very special.Study results in this paper enrich present research findings of soft soil,which can provide references for engineering construction in swamp regions.
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Key words:
- swamp soil /
- physical and mechanical properties /
- microstructure
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