厚强风化地质条件下的嵌岩灌注桩桩基设计和施工  

Design and construction of punch bored pile foundation in thick granular strongly weathered granite

作　　者：秦武 周晓春 俞长桂 顾祥奎 QIN Wu;ZHOU Xiao-chun;YU Chang-gui;GU Xiang-kui(CCCC Third Harbor Consultants Co.,Ltd.,Shanghai 200032,China)

机构地区：[1]中交第三航务工程勘察设计院有限公司,上海200032

出　　处：《水运工程》2019年第5期194-198,204,共6页Port & Waterway Engineering

摘　　要：针对薄覆盖层、厚强风化层地质条件下高桩码头的桩基选型,通过计算分析,比选斜灌注桩方案和直灌注桩方案。相对直灌注桩,斜灌注桩码头结构水平承载能力较高、桩身弯矩小,且工程造价低。针对斜灌注桩施工容易出现轴向偏位和塌孔的问题,根据工程实例归纳导向孔、加设导向器、预埋导管、沉设二级钢护筒等防治措施,为类似工程提供依据。The selection of wharf punch bored pile foundation types is studied in condition of thick granular strongly weathered granite with thin covering layer.By the calculation of project example,the batter punch bored pile plan and vertical punch bored pile plan are compared.Comparing with the vertical punch bored pile,the batter punch bored pile plan is characterized by high horizontal bearing capacity,low bending moment and low engineering cost.According to the offset-axes and hole-collapse in the construction process of the batter punch bored pile,we summarize the prevention measures including adding the guide-hole,guide apparatus,pre-buried duct and driving the secondary steel casing,which can be used as reference for similar projects.

关 键 词：斜灌注桩 高桩码头 薄覆盖层厚强风化岩 桩基选型 

分 类 号：U652.7[交通运输工程—港口、海岸及近海工程] U655.4[交通运输工程—船舶与海洋工程]