滇中红层泥岩与其重塑土的膨胀力研究
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摘要
为研究滇中红层泥岩的膨胀应力,通过改变密度与含水率的方法研究了泥岩重塑土膨胀应力与密度、含水率之间的关系式,进而推广到泥岩膨胀应力与密度、含水率之间的关系式。结果表明:(1)泥岩的重塑土的膨胀应力并不是受密度或者含水率单一因素影响,而是两者进行耦合的,故而拟合重塑土膨胀应力与密度、含水率之间的关系式;(2)泥岩与其重塑土的膨胀应力相差较大,这主要是由两者间的体积、密度、含水率以及与水接触面面积不同所导致;(3)在泥岩重塑土膨胀应力与密度、含水率之间关系式的基础上,充分考虑泥岩与其重塑土之间的与水接触面积比例系数、体积比例系数以及孔隙度比例系数,进而推广得到泥岩的膨胀应力与含水率、密度之间的关系式,计算证明可信度在92. 9%以上。
In order to study the swelling stress of the mudstone of the middle red layer in the Middle Yunnan Province, by changing the density and water content, the relationship between the expansion stress and the density and water content of the mudstone remolded soil is studied, and then the relationship between the swelling stress and the density and the water content of the mudstone is extended.The experimental results show that:(1)The swelling stress of the remolded soil of mudstone is not affected by the single factor of density or moisture content, but this two are coupled, therefore, the relationship between swelling stress and density and moisture content of remolded soil is fitted.(2)The swelling stress of mudstone is different from that of remolded soil, which is mainly caused by the volume,density, moisture content and the contact area between them.(3)On the basis of the relation between the swelling stress and the density and the water content of the mudstone remolding soil, the ratio coefficient, the volume ratio coefficient and the porosity ratio coefficient between the mud rock and the remolded soil and the water contact area are fully considered, and then the relation between the swelling stress of the mudstone and the water content and the density is popularized, and the calculation proves that the relation between the water content and the density of the mudstone is obtained. The trustworthiness is more than 92. 9%.
In order to study the swelling stress of the mudstone of the middle red layer in the Middle Yunnan Province, by changing the density and water content, the relationship between the expansion stress and the density and water content of the mudstone remolded soil is studied, and then the relationship between the swelling stress and the density and the water content of the mudstone is extended.The experimental results show that:(1)The swelling stress of the remolded soil of mudstone is not affected by the single factor of density or moisture content, but this two are coupled, therefore, the relationship between swelling stress and density and moisture content of remolded soil is fitted.(2)The swelling stress of mudstone is different from that of remolded soil, which is mainly caused by the volume,density, moisture content and the contact area between them.(3)On the basis of the relation between the swelling stress and the density and the water content of the mudstone remolding soil, the ratio coefficient, the volume ratio coefficient and the porosity ratio coefficient between the mud rock and the remolded soil and the water contact area are fully considered, and then the relation between the swelling stress of the mudstone and the water content and the density is popularized, and the calculation proves that the relation between the water content and the density of the mudstone is obtained. The trustworthiness is more than 92. 9%.
引文
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[3]苏航,邓辉,邓通海,等.滇中红层张河组软岩水理性质研究[J].人民珠江,2018(6):57-60.
[4]刘晓丽,王思敬,王恩志,等.含时间效应的膨胀岩膨胀本构关系[J].水利学报,2006,37(2):195-199.
[5]张云杰,樊成,刘小红,等.重庆地区不同地质年代泥岩膨胀特性试验研究[J].有色金属(矿山部分),2014,66(4):58-62.
[6]苏永华,赵明华,刘晓明.软岩膨胀崩解试验及分形机理[J].岩土力学,2005,26(5):728-732.
[7]刁心宏,杨守兴,冒小波.不同温湿环境下泥岩吸水及膨胀特性的试验研究[J].华东交通大学学报,2017,34(3):14-18.
[8]马丽娜,严松宏,王起才,等.哈密地区膨胀性泥岩膨胀特性研究[J].兰州交通大学学报,2015,34(1):17-22.