摘要
大直径直桩型嵌岩桩在水文和船舶荷载等水平力作用下,会呈现出特有的受力特征,近年来有相关的室内缩尺模型试验,但鲜有现场实体试验。结合浙东沿海某在建全直桩码头工程,对大直径灌注型嵌岩桩实体进行水平静载试验,对试验过程和结果数据进行分析研究。结果表明,受水平外力作用的大直径灌注型嵌岩直桩的最大弯矩出现在海床面下、覆盖层内2 D~3D位置,桩基设计时应重点考虑此位置的抗弯承载力是否满足要求,并对全断面嵌岩段的受剪承载力进行独立分析计算。
Large-diameter vertical rock-socketed pile will present a unique force characteristic under the action of horizontal forces such as hydrology and ship load.In recent years,there are relevant indoor scale model tests,but few on-site physical tests.We analyze and study the test process and achievement data by combining a all-vertical pile wharf project under construction in the east coast of Zhejiang,and carry out the horizontal static load test of large-diameter cast-in-place rock-socketed pile solid.The results indicate that the maximum bending moment of large diameter cast-in-place vertical rock-socketed piles subjected to horizontal external forces occurs below the seabed and around 2 D to 3 D within the cover layer.When designing pile foundations,it is important to consider whether the bending bearing capacity at this location meets the requirements,and to independently analyze and calculate the shear bearing capacity of the full rock-socketed section.
作者
俞梅欣
李小军
张燕
YU Meixin;LI Xiaojun;ZHANG Yan(Shanghai Research Centre of Ocean&Shipbuilding Marine Engineering,China Shipbuilding NDRI Engineering Co.,Ltd.,Shanghai 200093,China)
出处
《水运工程》
北大核心
2023年第6期199-204,共6页
Port & Waterway Engineering
基金
中船九院前瞻性专项研究项目(573-E2001)。
关键词
灌注型嵌岩桩
全直桩码头
水平静载试验
水平承载性状
cast-in-place rock-socketed pile
all-vertical pile wharf
horizontal force static load test
horizontal bearing characteristics
