承压与抗拔作用于一体的锚桩设计施工技术研究  

Design and construction technology of anchor piles with pressure-bearing and tension-bearing

作　　者：袁芬 

机构地区：[1]上海市基础工程有限公司,上海200002

出　　处：《岩土工程学报》2010年第S2期391-394,共4页Chinese Journal of Geotechnical Engineering

摘　　要：基于气压沉箱中同时具有防突沉支承力与助沉拉反力的锚桩设计与施工研究,发现锚桩经工况分析以抗拔承载力为主控,并可根据所处边界条件与常规应用的不同,对规范中确定设计桩长和桩径的公式进行合理调整,同时考虑节省投资,引入桩底后注浆与桩侧后注浆技术。在施工过程中通过自主开发的自动控制装置控制沉箱,使锚桩承压与抗拔承载作用于一体,很好做到了防突沉与助沉控制一体化,可供相关借鉴参考。Based on the research of design and construction of anchor piles which provide both supporting and pulling forces,it is found that anchor piles mainly hold uplift loads,and we can rationally adjust the norm formula of pile capacity in determining the length and diameter according to different boundary conditions.At the same time,post-grouting at the bottom and side of piles is introduced to reduce cost.By using self-developed device which makes anchor piles provide both supporting and pulling force,we can achieve smooth and efficient sink of pneumatic caissons,and it provides a good reference for similar projects.

关 键 词：锚桩 桩端后注浆 桩侧后注浆 抗拔桩 承压桩 气压沉箱 

分 类 号：TU473.1[建筑科学—结构工程]