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钙质结核粘土为区域特殊性土,一般具有结构性、非均匀性、膨胀性,当前工程界对该类土的工程性质仍未引起应有的重视。该文参阅了徐州地区多个工程勘察报告和文献资料,分析了研究区内钙质结核粘土的成因及分布规律,利用显微镜、X射线衍射试验手段,研究了其微观结构、矿物成分,通过现场原位测试及室内试验分析了其力学指标,并对其膨胀性、强度变化特征进行了研究。
The calcareous nodule clay is an area-specific soil that generally has structural, non-uniform, and expansive properties. The current engineering community has not received due attention to the engineering properties of this type of soil. In this paper, several engineering survey reports and literature data in Xuzhou area are referenced, and the origin and distribution of calcareous nodule clay in the study area are analyzed. Microscopic and X-ray diffraction test methods are used to study the microstructure and mineral composition of the site, through the site. The in-situ test and laboratory test analyzed the mechanical properties, and the characteristics of the expansibility and strength change were studied.