【作者】 胡世凯；

【导师】 王鹰；

【作者基本信息】 西南交通大学 ， 地质工程， 2011， 硕士

【摘要】 随着国家经济进一步发展,盐渍土地区土木工程的实施是对特殊地域条件下基础设施建设的基本要求,我国青海格尔木地区分布着大量的盐渍土,这些盐渍土由于受到温度、水分和盐分等环境因素的影响使修筑在该地区的路基产生盐胀和冻胀,导致路基不均匀隆起、松胀、开裂,对修筑在该地区的许多建造物(铁路、公路、建筑物)也造成了很大的危害。为了从根本上解决格尔木地区铁路、公路及建筑物受盐渍土危害的问题,本论文以格尔木市郊察尔汗盐湖地区盐渍土为研究对象,通过多次野外勘察,了解了盐渍土的野外特征和病害特点；通过现场对铁路病害严重区域和察尔汗盐湖周边盐渍土分布比较集中的地区进行样品采集,进行了大量的室内土工试验研究,研究了在不同含水量、含盐量及冻融循环情况下,盐渍土理化性质和力学特点的变化规律,同时研究了在改变这些环境因素和不同因素组合下盐渍土工程特性变化规律,并就这些因素的影响进行了解释,最后针对察尔汗盐湖地区的病害和特殊地段的路基,深入研究了该地区超氯盐渍土的物理性质、吸湿性、崩解性等因素对路基修筑的影响和处理方法。更多还原

【Abstract】 The civil engineering application in saline soil area is necessary to the development of the national economy in the special area. The province of Qinghai in Golmud region distributes the saline soil of the big area, because of being subjected to the saline soil influence of bad engineering properties, the construction of the highway and railway is quality disease by the saline soil land to harm over a long period of time of harass, and the movement of moisture-heat-salt is the main reason that causes the diaease in the subgrade in saline area such as tuberositas loose and dehiscence. Salt expantion is harmful to the constraction of railroad highway and buildings too.For resolving the highway rialroad and buildings to be subjected to the problem of the saline soil endanger by the root The soil sample in this thesis from Salt Lake Area of GeErMu. Investigating through many times, this paper studies the characteristics of soluble salt, earring on sample’s collecting from the region that passes the spot to harm the serious distriction and saline soils to distribute to the concentration to the railway disease, Carrying on the experiment of the indoor soil work, and Carrying on the saline soil basic physics and chemistry mechanics in dieffrent water content salt content and alternation of freezing and thawing, meanwhile,carrying on mechanics of the saline soil to produce stress under partial environment fators and different soil combination, and mechanism explanation of these factors and effects is made. Finally, for the Salt Lake area disease and the special section of the roadbed, we researched on the impaction of embankment by Ultra-chlorine saline soil physical properties moisture absorption disintegration impaction on the subgrade.更多还原