道路桥梁桩基础沉降性状及计算分析

The Behavior of Road Bridge Foundation Settlement and Its Analysis

由桥梁桩基实测沉降的统计分析，揭示了极端持力层的性质对桩基的沉降性状具有显著的影响；经’5组桩基进一步的计算比较，表明桩端持力层压缩模量计算值的离散是造成桩基计算沉降偏离实际沉降的主要原因之一。提出了用静力触探P5值修正Es值的方法，并且讨论了拉基附加应力的计算及计算沉降经验系数（s）的取值问题。

From actual measurement of the pile functions in road bridges, the paper has collected a group of statistics showing that the pile function settlement is largely related to the suppol'ting layer of the pile tip. To produce more Proof, the paper lays out five groups of analytical figures Obtained from five groups of pile functions to make a study of their relationship. The discovery is that the difference between calculation and actual measurement in the settlement computation of pile funchons is mainly caused by the value discretization in the compressibility whulus computation of the pile tip supposing layer. To compensate for that, the paper suggests that the value, E, be modified by the value of the static sounding, P. Also, it discusses how to calculate the additional stress on the pile function and how to take account of the empirical value.