A CONSTRUCTION CASE OF RAMPS LOCATED ON THE EXPANSIVE SOIL FOR HIGHWAY INTERCHANGE
The Baise basin in Guangxi Zhuang Autonomous Region is one of the famous areas for the wide distribution of expansive soil in China. Two highways, Baise-Longlin and Nanning-Baise, meet in the east of Baise city. The ramps of the interchange are completely located on the expansive soil. Therefore, the arrangement of interchange ramps and the stability of the cut slopes became big technological problems for the design and construction of the interchange. Based on the analysis of the engineering geological characteristics and properties of Baise expansive soil and the application of physical treatment technology on expansive soil subgrade, the original design was altered in the light of local conditions: the center-island was leveled in order to reduce the quantities of cut slopes; the excavated expansive soil was directly used to fill the embankments; and all the cut slopes of ramps were treated with the flexible supporting measure. Through the design changes in three aspects, the problems of building ramps in expansive areas are solved safely, economically and effectively. This paper can provide a great example and reference for the construction of similar projects.
ezpansive soil interchange ramp construction case flezible supporting center-island
He-Ping YANG Xiao NI Jie XIAO
School of Traffic and Transportation Engineering, Changsha University of Science&Technology.China
国际会议
International Symposium on Geoenvironmental Engineering(国际环境岩土工程研讨会
杭州
英文
930-934
2009-09-08（万方平台首次上网日期，不代表论文的发表时间）