Abstract：Research purposes:The Yuxi一Mengzi railway is through the tonghai lacustrine deposites basin. The main geological features are silty sand and silty clay. It is a typical seismic liquefaction foundation. Therefore，gravel一pile consolidation measures are applicated to reinforce the foundation. To demonstrate the feasibility of the compaction and drainage reinforcement，the dynamic tri一axial experimental study of liquefaction strength based on different sand density and drainage condition was performed.The pore water pressure of liquefaction foundation is effected by seismic intensity，which is simulated by shaking一terrace test. The liquefaction resistance of foundation was estimated by the change of pore pressure ratio.
Research conclusions:(1)By dynamic Tri一axial test and shaking一terrace test，the gravel一pile consolidation measures are effective reinforcement for the liquefaction foundation of tonghai basins.(2)The liquefaction resistance of silty sand and silty clay foundation has a significantly increase by the compaction and drainage effection of gravel一pile.(3)Under the seismic loading condition，the main liquefaction foundation area is out of embankment slope. The foundation of embankment has not liquefied，pore pressure ratio of which is much less than 0. 8. (4)For the foundation out of embankment slope，pore pressure ratio has increased rapidly when the liquefaction occurred.(5)For the liquefaction foundation，the reinforcement area is still need to be studied.(6)The liquefaction resistance of other reinforcement measures(Such as:cement一soil mixing piles，CFG piles，etc.)are needed to be further studied.(7)Shaking一isolated measures at toe of slope are recommended，and should be conducted a thorough study.
蒋楚生； 李庆海；贺钢；曹新文. 高裂度地震区铁路液化地基处理措施的试验研究[J]. 铁道工程学报, 2012, 29(12): 42-47.
JIANG Chu—sheng，LI Qing—hail，HE Gang，CAO Xin—wen. Experimental Research on the Liquefaction Foundation Treatment Measures Used in the High Crack Earthquake Area Railway. 铁道工程学报, 2012, 29(12): 42-47.
Wang Jun，Wang Lanmin etc．The Dynamic Triaxial Test Discrimination and Evaluation for Liquefaction of Saturated Sand [J ]． Northwestern Seismological Journal，2004(3)：285—288．
[2] Wichtmann T，Triantafyllidis T．Influence of a Cyclic and Dynamic Loading History on Dynamic Properties of Dry Sand[J]．Soil Dyn Earthquake Eng，2004(11)：789—803．
[3] Yasuhiko Okada，Kyoji Sassa，Hiroshi Fukuoka．Excess Pore Pressure and Grain Crushing of Sands by Means of Undrained and Naturally Drained Ring—shear Tests[J]．Engineering Geology，2004(75)：325-343．
Yang Guangqing．Construction Technique for Treating Vibrating Liquefied Foundation of High—speed Railway Line by Dry Vibrating Crushed Stone Pile[J]．Journal of Railway Engineering Society，2004(2)：31—34．
[5] 谢定义．土动力学[M]．西安：西安交通大学出版社，1998．
Xie Dingyi．Soil Dynamics[M]．Xi’an：Xi’an Jiaotong University Press，1988．
Wang Wenshao．The Liquefaction Mechanism and Differentiate Study of Saturated Sand[A]．The Science of China Institute of Water Resources and Hydropower Research．Beijing：China Waterpower Press，1982．
2012, Vol. 29 
版权所有 © 2014 《铁道工程学报》编辑部