【摘要】 对203国道松原至金宝屯一级高速公路沿线典型的盐渍土进行了勘察、采样和室内实验分析后得出,地表以下1m以内土的含盐量为0.13%~0.54%,盐渍土类型为弱碳酸盐渍土,为低液限粉质粘土。土的pH值为9.5~10,天然状态下呈强碱性。天然含水率条件下原状土的直剪试验没有发现盐渍土内聚力和内摩擦角明显偏低的现象,但初步析表明,此类盐渍土的工程性质会在水的作用下表现出明显的不稳定性。更多还原

【Abstract】 The studies of the changes of chemistry composition and soluble salt content with the depth of soil were carried out by surveying,sampling and mechanical test of the typical saline soil from Songyuan to Jinbaotun of the national highway No.203.For about the result,the saline soil was low liquid limit silty clay and its pH ranged from 9.5 to 10.Moreover,in the underground soil layer of 0 to 1m,the salt content ranged from 0.13% to 0.54% and it was weak carbonate-saline soil.Although it was found that the shear strength of the saline soil from the original soil quick shear test is not obviously low under the condition of natural water content,preliminary analysis indicated that the engineering properties of the saline soil was obviously unstable by the action of water.The result of the physical-chemistry properties of saline soil in the work area not only could be used for roadbed disease control in saline soil area but also for further studies on the engineering geologic properties of carbonate-saline soil.更多还原