一、前言对于桥台大型钻孔桩尺寸的确定,在大多数情况下水平荷载的作用是决定性的因素。自从1977年在东京召开的国际土壤会议以来,人们将埋于土中承受弯曲的桩区分为“主动”桩和“被动”桩。前者通过弹性嵌固将结构引起的水平荷载传至土壤,后者则由于周围土壤的微小位移通过土壤接近于水平方向的运动而受到荷载。虽然在桩和土壤 I. INTRODUCTION For the determination of the size of large bored piles in abutment, the effect of horizontal load is the decisive factor in most cases. Since the International Soil Conference held in Tokyo in 1977, people have been divided into “active” piles and “passive” piles buried in bent soil. The former transmits the horizontal loads caused by the structure to the soil through elastic anchoring, while the latter receives the load due to the soil near the horizontal movement caused by the slight displacement of the surrounding soil. Although in the pile and soil