【摘要】 从某客运专线桩板墙路基的受力特点出发,对桩板墙内侧土压力计算值和实测值进行对比分析,对反映桩板墙路基长期稳定性的土压力衰减规律进行试验研究。试验结果表明,桩板墙内侧土压力实测值与计算值存在较大差异,实测值在悬臂端中部存在拐点而非线性分布,桩身存在可优化空间。根据实测资料,桩身内侧土压力值在工后2个月内的衰减幅度最大,平均值为4. 15kPa,其后时间段的衰减幅度较小,平均值为0. 6～1. 1kPa。因此,路基填筑完成后的2个月为土压力衰减的关键期,在此期间应避免大型机械设备等重载对路基产生的影响。更多还原

【Abstract】 Starting from the bearing characteristics of pile-slab wall roadbed of a passenger dedicated line,this paper make a comparative analysis between the calculated value and the measured value of soil pressure inside the pile-slab wall and study experimentally the law of earth pressure attenuation reflecting the long-term stability of pile-slab embankment. The test results show that,there is a big difference between measured and calculated about soil pressure on the inner side of pile-slab wall and the measured values have a nonlinear distribution in the middle of the cantilever,therefore,there is an optimization space for the pile. According to the measured data,the value of soil pressure on the inner side of pile-slab wall decreased the most within 2 months after construction,the average was 4. 15 kPa and the small range in the later period,the average was 0. 6 ～ 1. 1 kPa. As a result,the first 2 months after subgrade filling is the critical period of soil pressure attenuation,the influence of heavy load on the roadbed should be avoided.更多还原