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| Research on the Red Clay Deformation Characteristics of Wuhan-Guangzhou Passenger Dedicated Line |
| FANG Wei, YANG Guo-lin , YU Dun-meng |
| Central South University, Changsha, Hunan 410075，China |
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Abstract Research purposes: Passenger dedicated line has strict deformation control after construction with very small amount. Along Wuhan-Guangzhou passenger dedicated line, extremely large area of red clay exists which covers more than 100km, from Wuhan to Shaoguan. And the harmful effects which red clay might bring to foundation deformation and slope stability. In order to avoid these results, red clay deformation characteristics were studied in 3 aspects, such as stress-strain relation，consolidation deformation and swell-shrinking deformation. Finally, the deformation control methods and engineering properties improvement were put forward.
Research conclusions: Take the entity project of Wuhan-Guangzhou passenger dedicated line for example，a lot of indoor tests, such as triaxial tests, consolidation tests, expansion tests and contraction tests were carried out. The characteristics of red clay including stress-strain relationship, consolidation deformation behavior, and expansive- contractive deformation behavior were studied. The following characteristics of red clay were obtained: behavior of ultra- consolidation characteristic, behavior of consolidation but without compassion, consolidation and anti-profile characteristic, medium compression, relative less expansive deformation and more contractive deformation. In red clay areas, we could improve the particle size distribution of red clay to reduce its deformation; use heavy load to constrain its expansion. During construction, CFG piles could be used to strengthen the foundation and pile-plank wall，as well as bolts could be adopted to strengthen slopes. These are of great significance to the construction of entity project of passenger dedicated line and provide references for similar projects
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Received: 17 July 2008
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2008, Vol. 25 
