引孔植桩工艺在深水裸岩码头灌注桩施工中的应用  

Application of hole-drilling and pile-inserting technology in wharf cast in-situ pile under the environment of deep water and rock foundation

作　　者：张校强 李琦 许建武[1] ZHANG Xiaoqiang;LI Qi;XU Jianwu(CCCC-FHDI Engineering Co.,Ltd.,Guangzhou 510290,China)

机构地区：[1]中交第四航务工程勘察设计院有限公司,广东广州510290

出　　处：《水运工程》2023年第9期211-215,228,共6页Port & Waterway Engineering

基　　金：国家自然科学基金面上项目(52071060)。

摘　　要：针对深水裸岩码头灌注桩的施工,无覆盖层导致水上施工平台的辅助钢管桩与灌注桩钢护筒着床困难,以某高桩码头工程为例,进行施工工艺实践研究,提出采用引孔植桩的解决方案。研究结果表明:1)针对水上施工平台搭建难题,可采用平台上冲孔引孔、水上船舶旋挖引孔等新工艺,提前对辅助钢管桩桩位进行引孔施工再植桩,并分析各自工艺的特点、适用性、功效及经济性。2)针对钢护筒埋设问题,可采用平台上旋挖引孔后植入的工艺。较好地解决了桩基入土深度问题,确保了灌注桩质量,可为类似工程提供参考。In view of the construction of cast in-situ piles under the environment of deep water and rock foundation,the lack of overburden soil leads to the difficulty in the placement of auxiliary steel pipe pile of overwater construction platform and steel casing of cast in-situ piles.Taking the construction of a high pile wharf as an example,this paper studies the construction technology practice and proposes the solution of hole-drilling and pile-inserting.The study results show that:1)To solve the problem of building overwater construction platforms,new technologies can be used,such as punching holes on the platform and vortically drilling holes on the vessel,so as to drill holes before pile inserting for auxiliary steel pipe pile in advance and analyze the characteristics of each technology,applicability,effectiveness,and economy.2)The embedding problem of steel casing is solved by the technology of vortically drilling holes on the platform before inserting.This technology well solves the problem regarding the embedded length of the pile and ensures the quality of the cast in-situ pile.It can serve as a reference for similar projects.

关 键 词：高桩码头 深水祼岩 灌注桩施工 引孔 植桩 

分 类 号：U655[交通运输工程—港口、海岸及近海工程]