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本文以西宁地区新近堆积黄土为对象,以冲洪积形成的新近堆积黄土为重点,对其特征及物理力学指标进行了分析和研究,提出了湿度系数(k_o)与压缩系数(a_(1-2))相关图(简称湿度系数图),作为西宁地区冲洪积新近堆积黄土分类及定名的初步意见,该分类法能较好的反映西宁地区冲洪积新近堆积黄土的工程特性,此分类不仅考虑了黄土湿陷性的特点,同时还考虑了新近堆积黄土另一个不可忽视或低估的工程特性——中高压缩性。该分类及其定名简单易行’有较好的使用价值。
This paper focuses on the recent accumulation of loess in Xining area, and focuses on the recent accumulation of loess formed by flooding. The characteristics and physico-mechanical indexes are analyzed and studied, and the coefficient of humidity (k_o) and compression coefficient (a_(1-) are proposed. 2) The correlation map (abbreviated as the humidity coefficient map) is used as a preliminary opinion for the classification and identification of newly accumulated loess in the floodplain of the Xining area. This classification method can better reflect the engineering characteristics of newly accumulated loess in the floodplain of Xining area. Not only the loess collapsibility characteristics were considered, but also another not-to-negligible or underestimated engineering characteristic of recently accumulated loess was considered - medium-high compressibility. This classification and its naming are simple and easy to use and have a good use value.