穿透抛石层超长钢管桩施工技术  

Construction technology for super-long steel pipe pile penetrating riprap layer

作　　者：魏启名 WEI Qiming(China Nuclear Harbor Engineering Co.,Ltd.,Guangzhou 511466,China)

机构地区：[1]中核港航工程有限公司,广东广州511466

出　　处：《水运工程》2023年第3期183-187,共5页Port & Waterway Engineering

摘　　要：近年来,港口工程中超长大直径钢管桩的使用越来越普遍,但该类桩基施工需配备大型打桩船,所需施工作业水域也较大。结合码头补桩工程实例,针对后方水域空间狭小、沉桩需穿透抛石层、钢管桩为超长桩等重难点,提出了冲击引孔穿透抛石层及分节吊打钢管桩的方法,叙述了沉桩施工工艺的流程和主要施工技术、所采用的施工设备等。采用该方法,工程施工效果良好、满足设计和规范要求。In recent years,super-long and large-diameter steel pipe piles have enjoyed increasingly wide application in port projects.However,the construction of this kind of pile foundations requires a large-scale piling barge and a large water area for construction operations.Drawing on an example of an additional piling project of a wharf,this paper addresses the difficulties involving the narrow space in the rear water area,the penetration of the riprap layer by the cast-in-place pile as needed,and the super-long steel pipe pile.For this purpose,the paper puts forward the methods of impacting a guide hole to penetrate the riprap layer and lifting and driving a steel pipe pile in a piecewise manner and describes the technological process of pile driving construction,the main construction technology,and the construction equipment.Owing to the employment of the proposed methods,the project achieves a satisfactory construction effect and meets the requirements of the design and specifications.

关 键 词：水域空间狭小 抛石层 超长桩 引孔 分节吊打 

分 类 号：TU474[建筑科学—结构工程] U656[建筑科学—土工工程]