铁道科学与工程学报2017，Vol.14Issue(3)：445-454,10.
高铁路堤中改性膨胀土工程应用特性试验研究
Experimental study on application characteristics of improved expansive soil in high-speed railway embankment
摘要
Abstract
A high speed railway embankment model equaling to prototype was built by using weak expansive soil and cement-treated expansive soil, which were taken from the high-speed railway construction in Nanning. Under natural rainfall and evaporation conditions, based on the self-designed monitoring system, the changing regularities of moisture content, temperature, suction and soil pressure in the embankment as well as the settlement deformation were monitored. The experiment results indicated: Expansive soil embankment slope atmosphere influence depth sharply concentrated within 0.5 m, the maximum influence depth could reach 2-3 m;the maximum settlement impact depth of the expansive soil embankment surface was about 4.5 mm, while the cement-treated soil was only about 2.5 mm, thus, cement-treated expansive soil can be used as a kind of high-railway embankment filling material. Furthermore, the lateral deformation of embankment slope was mainly shrinkage deformation, showing the characteristics of large on upper part and small in the lower part; and in the same position, the deformation of the expansive soil section was larger than that of the improved soil section.关键词
膨胀土/改性膨胀土/高铁路堤/影响深度/变形量Key words
expansive soil/cement-treated expansive soil/high-speed railway embankment/influence depth/deformation分类
建筑与水利引用本文复制引用
李朝辉,张柯宏,程谦恭,王文瑞,王艳涛,吕波,王晓瑞..高铁路堤中改性膨胀土工程应用特性试验研究[J].铁道科学与工程学报,2017,14(3):445-454,10.基金项目
国家自然科学基金资助项目(41530639, 41372292) （41530639, 41372292）
