Empirical correlations of soil parameters based on Cone Penetration Tests (CPT) for Greek soils

This study presents the results of Cone Penetration Tests (CPT) and estimated correlations with the results of other in-situ tests (standard penetration test, cross-hole, seismocone) and laboratory tests (classification and undrained shear strength tests). These tests cover nearly all types of penetrable soils in Greece and, together with the formulation of empirical correlations, complement and improve on previous studies due to the significant number of CPT measurements.     

Reflection and transmission of seismic waves at an interface betwen two saturated soils

ＲｅｆｌｅｃｔｉｏｎａｎｄｔｒａｎｓｍｉｓｉｏｎｏｆｓｅｉｓｍｉｃｗａｖｅｓａｔａｎｉｎｔｅｒｆａｃｅｂｅｔｗｅｎｔｗｏｓａｔｕｒａｔｅｄｓｏｉｌｓＪＵＮＹＡＮＧ（杨峻）ＳＨＩＭＩＮＧＷＵ（吴世明）ＺｈｅｊｉａｎｇＵｎｉｖｅｒｓｉｔｙ，Ｈａｎｇｚ...     

我国特殊岩土研究

本文分析，总结了我国特殊岩土理论与应用研究方面的新进展，内容涉及湿陷性黄土，软土膨胀岩土，红土，软岩和特殊土的结构性，指出需要进一步研究的问题，最后对特殊土的研究方法做了阐述。     

改性铝土矿与其它混凝剂净水性能对比的研究

改性铝土矿做净水剂，与市售其它混凝剂比较，具有ＰＨ值适用范围宽，对水中阴阳离子，尤其是对ＳＯ＾２－４的吸附能力强等优点。去除水中的浊度，颜色，ＣＯＤ等同于市售其它混凝剂。     

雷州半岛英峰岭剖面多期红土矿物学特征初步研究

雷州半岛英峰岭剖面多期红土矿物学特征初步研究＊文国高文启忠朱照宇徐义芳（中国科学院广州地球化学研究所，广州５１０６４０）关键词多期红土矿物学红土化雷州半岛我国南方热带－亚热带广泛发育的红土（包括红色风化壳和红色古土壤），记录了形成过程环境变迁的重要信...     

膨胀土判别与分类的灰关联分析法

基于灰色系统理论，给出一种用于膨胀土判别与分类的新方法—灰关联分析法。实际算例表明，该法具有简单方便、结果客观可靠等优点。     

关于地基承载力的探讨

以土质地基为研究对象 ,结合载荷试验 p s曲线 ,应用土体的极限平衡理论 ,对地基土的变形性状、地基土承载力以及承载力修正等问题进行了分析。分析结果显示 :地基土承载力不单是地基土抗剪强度指标的函数 ,同时还与作用其上的基础埋深及基础宽度等因素密切相关。进行地基基础设计时 ,应根据实际的基础埋深与宽度对勘察资料中的地基土承载力进行修正 ,并提出了有关承载力修正的建议     

石油污染对冻土热传导的影响

Complex experimental research of thermal properties of oil-contaminated frozen soils was carried out. On the basis of the obtained results the influence of the various factors connected with oil pollution on heat transfer in frozen soils was analyzed. And the model of heat transfer in frozen soils was offered.     

土壤的冷生构造及其对阿拉斯加土地利用的意义

Cryogenic structure (patterns made by ice inclusions) in seasonally frozen and permafrost-af-fected soils result from ice formation during freezing. Analysis of cryogenic structures in soils is essential to our understanding of the cryogenic processes in soils and to formulating land use management interpretations. When soils freeze, the freezing front moves downward and attracts water moving upward resulting in mainly horizontal lenticular ice formation. Platy and lenticular soil structures form between ice lenses in upper active layer. The reticular soil structure usually forms above the permafrost table caused by freeze-back of the permafrost. The upward freeze-back resulted in platy soil structure and the volume changes following the annual freeze-thaw cycle resulted in vertical cracks. The combined result is an ice-net formation with mineral soils embedded in the ice net. The upper permafrost layer that used to be a part of the active layer has an ice content exceeding 50% due to repeated freeze-thaw cycles over time. The mineral soils appear in blocks embedded in an ice matrix. The permafrost layer that never experienced the freeze-thaw cycle often consists of alternate layers of thin ice lens and frozen soils with extreme hard consistence and has relatively lower ice content than the ice-rich layer of the upper permafrost. Ice contents and thaw settling potentials associated with each cryogenic structure should be considered in engineering and land use interpretations.     

土体冻结过程中的盐分场研究

As to salty soil, salt migrates with water in freezing soils, assembles and crystallizes continuously. Consequently the swelling of the soil volume leads to the phenomenon of salt heaving. It has a practical significance for solving salt-heaving and frost-heaving damage in engineering to deepen the understanding of salt heaving mechanism. In this paper a general overview about new research results at this aspect was presented. And then the study of salt migration and salt heaving mechanism and present salt heaving models were summarized. For further researching the field of salt transfer it is urgent to continually strengthen the salt migration and the numerical simulation study of salt heaving mechanism to expect perfecting the general evaluation of salt heaving prediction models so as to have a better service for engineering.