土结构性对软土振动排水量的影响  

Influences of Soil Structure on Vibration Drainage Volume of Soft Soils

作　　者：苗永红 朱天骋 殷杰[1] MIAO Yonghong;ZHU Tiancheng;YIN Jie(Faculty of Civil Engineering and Mechanics,Jiangsu University,Zhenjiang 212013,Jiangsu,China)

机构地区：[1]江苏大学土木工程与力学学院,江苏镇江212013

出　　处：《济南大学学报（自然科学版）》2024年第1期1-7,共7页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金项目(51978315)。

摘　　要：针对当前振动排水法加固软土地基未考虑土结构性影响的研究空白,以衡量振动排水效果的标准中最具代表性的振动排水量为研究对象,探讨土结构性对软土振动排水量的影响;通过掺入不同质量的水泥调节软土的胶结程度,使用盐粒构造大孔隙结构,对孔隙比分别为1.3、 1.5、 1.7,掺入水泥的质量分数分别为2%、 4%、 6%,掺入盐粒的质量分数分别为0、 5%、 10%的结构性软土进行围压分别为40、 70、 120 kPa的振动排水试验,分析孔隙比、胶结程度、大孔隙结构3个结构性因素影响下软土的振动排水效果。结果表明:孔隙比对结构性软土振动排水效果的影响最大,在相同围压时,结构性软土的振动排水量随着孔隙比的增大而增大,随着胶结程度和大孔隙结构的增大而减小;围压的增大会劣化结构性软土的振动排水效果;在中、低围压时,胶结程度对结构性软土振动排水效果的影响较大且随着围压的增大而逐渐减小,大孔隙结构对结构性软土振动排水效果的影响较小。In view of the current research blank that influences of soil structure was not considered in vibration drainage methods to strengthen soft soil foundation,influences of soil structure on vibration drainage volume of soft soils were discussed taking the most representative vibration drainage vo lume among standards for measuring the vibration drainage effect as the research object.Cementation degree of soft soils was adjusted by adding cement with different masses,salt particles were used to construct macropore structure,and vibration drainage tests with confining pressures of 40,70,120 kPa were conducted for structural soft soils with void ratios of 1.3,1.5,1.7,cement mass fractions of 2%,4%,6%,and salt particle mass fractions of 0,5%,10%to analyze vibration drainage effect of soft soils under influences of three structural factors of void ratio,cementation degree,and macroporous structure.The results show that the void ratio has the greatest influence on the vibration drainage effect of structrual soft soils.At the same confining pressure,the vibration drainage volume of structural soft soils increases with the increase of void ratio,and decreases with the increase of cementation degree and macropore structure.The increase of confining pressure can deteriorate the vibration drainage effects of structural soft soils.At medium and low confining pressures,the influence of cementation degree on vibration drainage effect of structrual soft soils is great and gradu ally decreases with the increase of confining pressure,while the influence of macropore structure on vibration drainage effect of structrual soft soils is small.

关 键 词：软土 土结构性 振动排水 围压 振动排水量 

分 类 号：TU447[建筑科学—岩土工程]