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针对京沪高速铁路典型地质条件的CFG桩加固路段,采用FLAC3D有限差分程序,模拟路基的填筑过程,将桩和土按不同的材料考虑,计算CFG桩加固后路基的沉降,并与实测沉降比较,验证了计算模型的可行性。利用该模型分析了不同桩长、桩间距对沉降的影响,并根据其路基沉降量,得到了该路段CFG桩的合理桩长与桩距。
According to the typical geological conditions of Beijing-Shanghai high-speed railway CFG pile reinforcement section, using FLAC3D finite difference program to simulate the filling process of subgrade, the pile and soil according to different materials to calculate the settlement of CFG pile subgrade after consolidation, and with the measured settlement The feasibility of calculating the model is verified by comparison. Based on the model, the influence of different pile length and pile spacing on settlement is analyzed. According to the subgrade settlement, the reasonable pile length and pile spacing of CFG pile are obtained.