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不同掺灰率条件下改良膨胀土电阻率变化规律的研究 被引量:3

Study on Variation of Resistivity of Modified Expansive Soil with Different Dust ratio
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摘要 针对东北某铁路试验段不同消石灰掺量的改良膨胀土进行了不同养护龄期的自由膨胀率试验、抗剪强度试验、电阻率测试试验,分析了不同消石灰掺量的改良膨胀土随着养护龄期增长的膨胀性指标、强度指标与其电阻率的关系。研究表明:随着养护龄期的增加,改良膨胀土的自由膨胀率逐渐减小;内摩擦角不断增长,最终趋向稳定;黏聚力则先减小再增大,且最终养护后期土体的黏聚力虽然随着龄期的增长而增长,却达不到养护开始时的数值;电阻率越来越大,且在养护初期电阻率增长较快,最终逐渐趋于稳定。 In this paper,the modified expansive soils with different slag content of different slag in the test section of north eastern China were subjected to the test of free expansion rate,shear strength test and resistivity test,and the modified expansive soil with different slag content was analyzed.Growth index of the expansion index,the relationship between the intensity index and its resistivity.The results show that the free expansion rate of the modified expansive soil decreases with the increase of the curing age,the internal friction angle increases and finally tends to be stable.The cohesion decreases first and then increases,and the final although the cohesion increases with the growth of the age is not reach the value of the beginning of conservation;resistivity is growing,and in the initial curing rate of rapid growth,and ultimately gradually stabilized.
作者 刘磊 LIU Lei(Waterworks Management,Guangzhou Zengcheng Water,Guangzhou 511300,China)
出处 《人民珠江》 2018年第11期34-38,共5页 Pearl River
关键词 膨胀土 消石灰 掺量 电阻率 expansive soils lime content resistivity
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