【摘要】 以玉蒙铁路碎石桩加固处理路堤液化地基为工程背景,采用水平振动模拟地震荷载进行了碎石桩复合地基路基的振动台模型试验,试验测试了不同位置的孔压,对孔压的时程、分布特点和孔压比的变化进行了分析。水平加速度为0.3 g时,路堤坡脚以外地基产生液化,而路堤范围内未出现液化。采用碎石桩复合地基加固铁路液化地基时,需适当加宽加固地基的宽度。更多还原

【Abstract】 As the case of the liquefied foundation consolidated with gravel pile along Yuxi-Mengzi Railway,shaking table model test for the subgrade with gravel pile composite foundation is carried out through simulating seismic load by horizontal vibration,in which the pore pressures at different positions are tested as well as the time interval,distribution characteristics and change of pore pressure ratio are analyzed.When the horizontal acceleration is 0.3g,the foundation outside the toe of the embankment is liquefied while that inside the range of embankment is not.Where liquefied foundation of railway is consolidated with gravel pile composite foundation,the width of the foundation needs to be widened and reinforced.更多还原