Construction Vibration's Influence on Stability of Highway Embankment on Structural Soft Ground
ZENG Qing-jun1, MO Hai-hong1, LIAO Jian-chun3, LI Mao-ying2
1.South China University of Technology, Guangzhou, Guangdong 510640, China; 2.Guangdong Communication Polytechnic, Guangzhou, Guangdong 510650, China; 3.Guangdong Highway Design Institute, Guangzhou, Guangdong 510507, China
Abstract：Research purposes: The mechanism of fracture of structural soft clay and the reason of failure of highway embankment are found out to provide evidence for design computation of construction stability of highway embankment on structural soft ground.
Research methods; the mechanism of fracture of structural soft clay by vibrating road roller is compared to that by dynamic compaction on soft ground. And the reason of failure of highway embankment is analyzed based on the physical and mechanical properties and microstructure characteristics of soft clay in the Pearl River Delta.
Research conclusions: The depositional structure of soft clay is mainly characteristic of flocculent structure with high void ratio, lower shear strength and higher sensitivity. Dynamic vibration's effect on soft ground is similar to dynamic compaction's effect. The added number of void ratio by dynamic compaction on soft ground is 7 times as much as that by static load. The reason of failure of highway embankment is that the low embankment is placed by a dynamic vibrating roller with 16 t weight, roller compaction for 10 times. It is suggested that the parameters of shear strength of soft clay should be reduced or doing design computation of construction stability of highway embankment on structural soft ground road in the condition of vibration vibrating.
曾庆军，莫海鸿，廖建春，李茂英. 施工振动对结构性软粘土路堤稳定的影响[J]. 铁道工程学报, 2006, 23(6): 11-16.
ZENG Qing-jun, MO Hai-hong, LIAO Jian-chun, LI Mao-ying. Construction Vibration's Influence on Stability of Highway Embankment on Structural Soft Ground. 铁道工程学报, 2006, 23(6): 11-16.
2006, Vol. 23 
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