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新疆不少地方,如莫索湾及下野地等灌区,均位于准噶尔盆地古尔班通古特沙漠边缘,那里风积砂丘星罗棋布,可以用作混凝土防渗衬砌渠道的垫层材料。本文通过室内外试验和现场观测资料,阐述利用风积砂作防冻垫层的有关问题。 一、室外冻胀试验 风积砂的特点是颗粒均匀、粉粘粒含量极少,渗透性能好。莫索湾和下野地两灌区相隔百余公里,但因同处于古尔班通古特沙漠边缘,风积砂的颗粒组成基本相似(表
Many areas in Xinjiang, such as the Mosuo Bay and the Xiayedi, are all located in the edge of the Gurbantunggut Desert in the Junggar Basin, where aeolian sand dunes are dotted and can be used as bedding material for concrete impervious lining channels. In this paper, indoor and outdoor experiments and on-site observation data, elaborated the use of aeolian sand as a protective layer of the relevant issues. First, the outdoor frost heave test Aeolian sand is characterized by uniform particles, powder clay content is minimal, good permeability. Mosuowan and Xiayedi irrigated areas separated by more than 100 kilometers, but due to the same in Gurbantunggut desert edge, aeolian sand particles are basically the same composition (table