新疆板块状盐渍土工程特性(英文)  

Engineering characteristics of plate-like saline soil in Xinjiang

作　　者：冯忠居[1] 李维洲[1,2] 王廷武 刘小飞[4] 成超[1] 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]中交第二航务工程局有限公司,湖北武汉430040 [3]新疆维吾尔自治区交通厅,新疆乌鲁木齐830000 [4]广东省公路勘察规划设计院有限公司,广东广州510507

出　　处：《交通运输工程学报》2010年第6期1-8,共8页Journal of Traffic and Transportation Engineering

基　　金：Scientific Research of National West Communications Construction(2009 318 000 03);Communications Technology Project of Xinjiang Uygur Autonomous Region(200609251)

摘　　要：采用室内颗粒分析试验、界限含水量（质量分数）试验、击实试验、强度特性试验、变形特性试验和溶胀试验分析了板块状盐渍土工程特性。分析结果表明：板块状盐渍土主要由砾类土构成,其级配因取土样位置而差异较大;塑性指数范围、最大干密度范围与最佳含水量范围分别为0.57~3.20、2.22~2.25 g.cm-3与5.7%~6.2%;天然状态下的无侧限抗压强度最大值为28.6 MPa,具有岩石的特性,属于盐岩;板块状盐渍土为低压缩性土,满足高速公路地基变形指标要求;在水、热环境的变化下,随着板块状盐渍土含盐量的增大,溶陷系数与盐胀力（量）增大,盐胀起胀温度随着硫酸钠含量的增加有较大幅度的提前;盐渍土地区公路交通荷载可抑制其盐胀,从而可以降低盐胀对工程产生的病害。The engineering characteristics of plate-like saline soil were analysed on the basis of laboratory particle size analysis test,water content（mass percentage） limit test,compaction test,strength test,deformation test and swelling test.Analysis result shows that plate-like saline soil is mainly made up of gravelly soil and has different gradations resulted from sampling locations.The ranges of plasticity index,maximum dry density and optimum moisture content are 0.57～3.20,2.22～2.25 g·cm-3 and 5.7%～6.2% respectively.Under natural condition,its maximum unconfined compressive strength is 28.6 MPa,and it has the characteristics of rocks and belongs to rock salt.Plate-like saline soil has low compressibility and meets the deformation index requirement of highway subgrade.Under the change of water and heat environment,with the increase of salinity,the coefficient of collapsibility and salt-expansion stress increase,and the salt-expansion temperature reaches ahead of time as the sodium sulfate content increases.Salt expansion can be controlled by vehicle load,which reduces the engineering disease resulted from salt expansion.10 tabs,5 figs,21 refs.

关 键 词：路基工程 板块状盐渍土 工程特性 击实特性 强度特性 变形特性 溶胀特性 盐胀特性 无侧限抗压强度 

分 类 号：U416.16[交通运输工程—道路与铁道工程]