灌注桩墙与重力式结构组合体系在码头升级改造中的应用  

Application of composite system of cast-in-place pile wall and gravity structure in wharf upgrading and reforming

作　　者：刘杰[1] 巴蕾 刘宁 夏陆军 LIU Jie;BA Lei;LIU Ning;XIA Lu-jun(CCCC Water Transportation Consultants Co.,Ltd.,Beijing 100007,China)

机构地区：[1]中交水运规划设计院有限公司,北京100007

出　　处：《水运工程》2022年第S01期101-108,共8页Port & Waterway Engineering

摘　　要：在中东某码头升级改造工程中,推荐采用灌注桩墙与重力式结构组合体系,能够充分发挥两种结构的受力特点,有效解决码头前沿线前移、水深加大、码头上部荷载大幅增加、水平位移要求严、减小高基床扰动等技术难题。采用强度折减法和弹塑性分析法对该组合结构统一模型的结构稳定、桩墙内力和码头水平位移等主要技术指标开展Plaxis有限元分析,并对比不同桩墙和拉杆水平刚度下的结构稳定、内力及位移等变化规律。结果表明,桩墙和拉杆的水平刚度对组合体系的结构稳定性和桩墙内力的影响基本一致,均是随着二者的水平刚度降低而降低;拉杆的水平刚度降低引起水平位移的增加,而桩墙水平刚度的降低则有利于降低一定的水平位移。The composite system of cast-in-place pile wall and gravity structure is recommended for a wharf upgrading project in the Middle East. The system is able to make full use of the performances of the two structures and effectively solves the technical problems such as the forward movement of the berth line, deepening of berth water, significant increase in loading on the superstructure, strict requirements for horizontal displacement and rock foundation’s disturbance. The strength reduction method and the elastic-plastic analysis are used to carry out Plaxis finite element analysis of the main technical indicators of the composite structure, including the structural stability, the internal force of the pile wall and the horizontal displacement of the wharf. In addition, this paper compares the developing rules of structural stability, internal force and displacement under different horizontal stiffness of pile wall and tie-rod. The results show that the decreases in horizontal stiffness of pile wall and tie-rod can reduce the structural stability and pile wall’s internal force. The decrease in tie-rod’s horizontal stiffness causes the increase in the horizontal displacement, while the decrease in pile wall’s horizontal stiffness is beneficial to reduce the horizontal displacement to some extent.

关 键 词：灌注桩墙 重力式结构 组合体系 码头升级改造 强度折减法 弹塑性分析 

分 类 号：U656.1[交通运输工程—港口、海岸及近海工程]