基于PC工法桩的PCC桩在超软地基加固的新实践  

New practice of PCC pile based on PC pile in ultra-soft ground improvement

作　　者：金小荣 莫立成 吴国彬 郭永 严剑松 JIN Xiao-rong;MO Li-cheng;WU Guo-bin;GUO Yong;YAN Jian-song(The Architectural Design&Research Institute of Zhejiang University Co.,Ltd.,Hangzhou 310028,China;Hangzhou Yuanfang Foundation Engineering Co.,Ltd,Hangzhou 311100,China;The Hangzhou Huayun Foundation Engineering Co.,Ltd,Hangzhou 310015,China;Ningbo Industrial of Architecture Design Institute Co.,Ltd.,Ningbo 315000,China)

机构地区：[1]浙江大学建筑设计研究院有限公司,浙江杭州310028 [2]杭州圆方地基基础工程有限公司,浙江杭州311100 [3]杭州华蕴基础工程有限公司,浙江杭州310015 [4]宁波市工业建筑设计研究院有限公司,浙江宁波315000

出　　处：《地基处理》2020年第2期116-120,共5页Journal of Ground Improvement

摘　　要：大直径现浇混凝土薄壁筒桩和现浇混凝土大直径管桩(PCC桩)在不同地基的工程应用中遇到了一些难题,例如混凝土充盈系数偏大、施工速度偏慢、易断桩等。基于PC工法桩,设计了PCC桩装置和施工设备,高效解决了土芯上浮难题。新装置具有施工速度快、质量可靠、设备轻便等优点,采用了工厂化加工装置和机械化施工方法,容易监管,是对原有PCC桩的有益补充,也可应用于基坑内的临时道路地基加固,对于类似工程有一定的借鉴意义。The large-diameter cast-in-situ concrete tubular pile and cast-in-place thin-wall concrete pile(PCC pile)have some problems for different foundations when it is applied in engineering,such as high concrete filling coefficient,slow construction speed and easy-to-be broken etc.Therefore,the PCC pile device and construction equipment are designed based on the PC pile,which effectively solves the problem with floating soil core.The new device has advantages such as fast construction speed,reliable quality,and portability.Adopting factorized processing equipment and mechanized construction method,it is easy to supervise.Therefore,it is a useful supplement to the original PCC pile,and can also be used to reinforce temporary road foundation in foundation pits,which be valuable for similar engineering projects.

关 键 词：PC工法桩 PCC桩 超软地基 地基加固 土芯上浮 

分 类 号：TU731[建筑科学—建筑技术科学]