电石灰改良滨海盐渍土路基工程特性研究

Study on engineering properties of calium carbide dust improved inshore saline soil for highway subgrade

滨海地区用盐渍土作为路基填料是交通建设需要解决的重大岩土工程问题之一。滨海盐渍土作为一种特殊土,具有溶陷、盐胀、腐蚀等不良的工程特性,为了解决滨海盐渍土的工程问题,进行了电石灰改良盐渍土路基填料的液塑限试验、室内CBR试验、回弹模量试验、干湿循环试验和冻融循环试验。试验结果表明,盐渍土经电石灰改良后,其物理、力学性能得到了有效改善,能够用于滨海地区高速公路路基修筑。该研究成果对滨海地区盐渍土路基的修筑具有参考价值。

Inshore saline soil is a special soil which has some bad engineering properties,such as collapse,dilatability and erosion ect.Filling of highway subgrade with saline soil is one of the important geotechnical engineering challenges,which restricts the development of highway in inshore saline area.In order to solve the engineering application of the saline soil in inshore area,large numbers of test are conducted.The test includies the liquid and plastic limits test,CBR test,resilient modulus test,wetting-drying cycle test and freeze-thaw cycles test.The feasibility of improved saline soil for inshore sungrade filling is discussed based on the engineering technique.The conclusion is useful for the construction of inshore area saline soil highway subgrade.