常德-张家界高速公路慈利东互通段膨胀土工程特性及改性研究

在对常德—张家界高速公路慈利东互通段工程地质综合测试、补充勘探的基础上 ,通过对膨胀土及其改良土进行了系统的试验研究 ,如自由膨胀率、有荷膨胀量、收缩、胀缩总率、颗粒分析、压缩、抗剪强度、承载比试验 ,评价了该段膨胀土的工程特性 ,对于指导膨胀土路基的设计与施工 ,具有重要的意义

ENGINEERING PROPERTIES OF EXPANSIVE SOILS ALONG THE CHANGDE-ZHANGJIAJIE EXPRESSWAY AND ITS IMPROVEMENT

Based on a comprehensive engineering geological investigation and supplemental explorations, a series of laboratory tests were conducted on the expansive soil and the improved soil along the Changde-Zhangjiajie Expressway. They included free swelling ratio, loaded swelling capacity, shrinkage, total swelling and shrinkage, distribution of granular particles, compressive strength, shear strength and California Bearing Ratio (CBR). Engineering properties of the expansive soil were then evaluated based on test results, which provided important guidelines for design and construction of pavement using the expansive soil as subsoil。