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Numerical Study of Stone Column Reinforced Composite Foundation of Highway under Static and Seismic Load

机译：静态和地震荷载下高速公路石柱增强复合地基的数值研究

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Stone column reinforced composite foundation of highway under static and seismic load is simulated by numerical method. Fist, calculation model was built up, and verified by in situ test. Then the whole construction process of highway stone column reinforced composite foundation is simulated, after 3 years of traffic load, a seismic load was imposed on bottom of the model. Calculation result show that: in construction and run time period, drainage effect of stone column is significant, when pile length reached to 12 m, maximum pore pressure in middle of stone column reduced to about 4 kPa, when pile length reached to 10 m, effect of pile length on settlement is small; composite foundation has smaller maximum horizontal displacement in stone column; surface and toe of embankment slope is apt to liquefy under seismic load, stone column can eliminate liquefaction potential to a certain extent, especially in composite foundation range.
机译：用数值方法模拟静态和地震荷载下高速公路的石柱增强复合地基。建立了拳头，计算模型，并通过原位测试验证。然后，经过3年的交通载荷，模拟了公路石柱增强复合地基的整体施工过程，施加了抗震载荷。计算结果表明：在施工和运行时间段，石柱的排水效果显着，当桩长达到12米时，石柱中间的最大孔隙压力降至约4kPa，当桩长到10米时，桩长对沉降的影响小;复合地基在石柱中具有较小的最大水平位移;路堤斜坡的表面和脚趾在地震载荷下易液化，石柱可以在一定程度上消除液化电位，特别是在复合地基范围内。

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