水泥土搅拌桩芯样电阻率特性的应用研究

发布时间：2018-02-14 13:13

本文关键词： 水泥土电阻率无侧限抗压强度渗透系数变形模量　出处：《土木工程学报》2016年10期 　论文类型：期刊论文

【摘要】：为了进一步论证应用电阻率法检测水泥土搅拌桩施工质量的可行性,以现场钻取的水泥土芯样为研究对象,进行了不同交流电频率下的电阻率、无侧限抗压强度和渗透试验。结果表明:电阻率随电流频率的增加而减小,根据电阻率的变化趋势可以发现存在一个临界频率50k Hz;水泥土电阻率和无侧限抗压强度均随土层的变化呈现一致的变化规律,但是水泥土电阻率和渗透系数均随土层的变化呈现相反的变化规律;水泥土无侧限抗压强度和电阻率、渗透系数和电阻率、变形模量和无侧限抗压强度之间均呈较好的线性关系;建立了可以通过水泥土电阻率估计其无侧限抗压强度、变形模量和渗透系数的关系式。研究结果可为现场检测水泥土施工质量提供参考。
[Abstract]:In order to further demonstrate the feasibility of using resistivity method to test the construction quality of cement soil mixing pile, the resistivity of cement soil core sample drilled in the field was studied under different alternating current frequency. Unconfined compressive strength and permeation test. The results show that the resistivity decreases with the increase of current frequency. According to the change trend of resistivity, it can be found that there exists a critical frequency of 50kHz, and the resistivity and unconfined compressive strength of cement-soil show the same change rule with the change of soil layer. However, the resistivity and permeability coefficient of cement-soil show the opposite law with the change of soil layer, the compressive strength and resistivity, permeability coefficient and resistivity of cement-soil are not limited. There is a good linear relationship between deformation modulus and unconfined compressive strength, and the unconfined compressive strength can be estimated by the resistivity of cement soil. The relationship between deformation modulus and permeability coefficient. The results can be used as a reference for site testing of cement soil construction quality.
【作者单位】：太原理工大学;北京中岩大地工程技术有限公司;
【基金】：国家自然科学基金(51078254) 教育部新世纪优秀人才支持计划(NCET-12-1039) 山西省科技创新重点团队建设计划(2014131019)
【分类号】：TU473.1

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