水运工程灌注桩桩身强度计算分析

Calculation and Analysis of the Strength of Cast-in-place Pile in Water Transportation Engineering

水运工程中灌注桩是最常用的桩基型式之一,设计时不仅要计算桩基承载力,还要对桩身强度进行计算。本文根据《水运工程混凝土结构设计规范》(JTS151-2011)对钻孔灌注桩桩身强度进行了计算,得出桩身能承载的最大弯矩与轴向压力有关,并随着轴向压力呈现先增大后减小的趋势,这就要求设计人员不能简单确定桩身能承受的弯矩,而必须结合轴向压力才能确定。

Cast-in-place pile is the most commonly used form of pile foundation in water transport engineering. It should not only calculate the bearing capacity of pile foundation, but also calculate the strength of pile at design time. According to the Code for Design of Concrete Structure in Waterway Engineering (JTS 151-2011), the strength of bored cast-in-place piles is calculated. It is concluded that the maximum bending moment of pile body is related to the axial pressure, which increases first and then decreases with the increase of the axial pressure. This requires that the designers cannot simply determine the bending moment of pile body, but must combine with the axial pressure to determine it.