Loading test study on settlement deformation law of deep soft soil layer
YANG Xiaojie1，2，LIU Dongming1，2，3，WANG Xiaocun3
(1. School of Mechanics and Civil Engineering，China University of Mining and Technology，Beijing 100083，China；2. State Key Laboratory of Deep Geomechanics and Underground Engineering，China University of Mining and Technology，Beijing 100083，China；3. China Airport Construction Group Corporation of CAAC.，Beijing 100101，China)
The deep soft soil layer of the 4th runway at Pudong Airport was studied in this paper. During preloading test，the ground settlement deformation law was analyzed and compared under two conditions，using plastic drain plate or without. It was found that during preloading，both the ground settlement and settlement rate in areas using plastic drain plate were much larger than those areas without plastic drain plate. The instantaneous settlement during preloading was both large in two conditions，which both exceeded 50% of the total settlement during whole preloading process. During the process of surcharge preloading，compared to actual loading，the state of the ground soil would appear that shallow soil was over consolidation while the deep soil was still under consolidation. Therefore，for deep multi-layer soft soil ground，residual settlement should be calculated layered and separately after unloading. The research results would have important reference significance to the design and construction of soft soil foundation treatment project.
杨晓杰1，2，刘冬明1，2，3，王孝存3. 深厚软弱土层沉降变形规律堆载试验研究[J]. 岩石力学与工程学报, 2017, 36(S2): 4259-4266.
YANG Xiaojie1，2，LIU Dongming1，2，3，WANG Xiaocun3. Loading test study on settlement deformation law of deep soft soil layer. , 2017, 36(S2): 4259-4266.
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2017, Vol. 36 
