塔克拉玛干沙漠腹地风积沙力学特性试验研究  

Experimental Study on Mechanical Characteristics of Aeolian Sand in the Hinterland of Taklimakan Desert

作　　者：刘学军 白若宁 许志涵 LIU Xue-jun;BAI Ruo-ning;XU Zhi-han(College of Civil Engineering and Architecture,Xinjiang University,Urumqi,Xinjiang,830046,China;Xinjiang Institute of Building Science(Limited Liability Company),Urumqi,Xinjiang,830002,China)

机构地区：[1]新疆大学建筑工程学院,新疆乌鲁木齐830046 [2]新疆建筑科学研究院(有限责任公司),新疆乌鲁木齐830002

出　　处：《建材技术与应用》2023年第5期5-9,共5页Research and Application of Building Materials

基　　金：中建新疆建工(集团)有限公司课题(65000022859700210197)。

摘　　要：为探究塔克拉玛干沙漠腹地风积沙作为地基土的物理力学特性,对该地风积沙进行了含水率、颗粒粒径、标准击实及直接剪切等物理力学试验。试验表明:该地区表层风积沙天然含水率为0.55%,距地表1 m深处含水率为1.59%;粒径范围主要分布在0.075~0.250 mm范围内,为级配不良的细砂;击实曲线表明该风积沙最佳含水率为19.63%时,在干燥状态和最佳含水率状态都可达到最大干密度1.65 g·cm^(-3);含水率和干密度的变化对风积沙抗剪强度有显著影响;干燥状态下风积沙的抗剪指标内摩擦角为32°。In order to explore the physical and mechanical characteristics of aeolian sand in the hinterland of Taklimakan desert as foundation soil,the physical and mechanical tests such as moisture content determination,particle size analysis test,standard compaction test and direct shear test were carried out.The results showed that the natural moisture content of surface aeolian sand in this area is 0.55%,and the moisture content at the depth of 1m from the surface is 1.59%.The particle size range is mainly distributed in the range of 0.075~0.250 mm,which is poorly graded fine sand.The compaction curve shows that the optimum moisture content is 19.63%,and the maximum dry density can reach 1.65 g·cm^(-3) in both dry state and optimum moisture content state.The change of moisture content and dry density has significant influence on the shear strength of aeolian sand.The internal friction angle of aeolian sand in dry state is 32°.

关 键 词：风积沙 击实特性 剪切特性 含水率 干密度 

分 类 号：TU411[建筑科学—岩土工程]