宝钢地区钢管桩土芯闭塞性状研究

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英文篇名：Research on soil core plugging up of open-end stell pipe pile in Bao-Stell Area 中文刊名：岩土力学 英文刊名：Rock and Soil Mechanics 作者：陈斌 英文作者：CHEN Bin1 ; 2 (1. School of Naval Architec tare fare and ocean ; cvil Eng ; Shanghai Jiaotong University ; Shanghai200030 ; Chtna ; 2. Shanghai Urban Construction Group ; Shanghai 200023 ; China) 中文关键词：钢管桩 ; 土芯 ; 闭塞 ; 应力场 ; 位移场 英文关键词：steel pipe pile ; soil core ; plugging-up ; stress field ; displacement field 出版日期：2004-12-30 机构：上海交通大学船舶海洋与建筑工程学院 上海,200030上海城建(集团)公司,上海,200023 年：2004 期：S2 出版单位：岩土力学

摘要

开口钢管桩在沉桩过程中,桩端土一部分将进入管内形成“土塞”或“土芯”,一部分则被挤进土的四周。土芯进入管内的高度,将直接影响桩的设计。土芯闭塞的研究具有代表性的有山原法、田岛法等。对土芯高度能否做到事先预估,就宝钢地区的钢管桩土芯闭塞的实测资料经过整理分析拟合得到 D-η曲线,并与实测值及山原法作比较,得到较合理的预估值。重点讨论了在宝钢地区开口钢管桩的桩径 D 对η的影响,可推断其它桩径在这一地区的沉桩的土芯高度,土芯承担的荷载,钢管桩的应力场,位移场。亦为相似工程提供可能的参考。
In the course of piling, when the open-end of steel pipe pile is sinking, a part of soil would fill steel pipe, in which it is called soil core, and other part of soil would squeeze out around the steel pipe. estimating right height of soil core in the steel pipe will have effect on designing work. There are better methods in the field of soil core in Japan. Based on Baoshan Iron and Steel (Group) Co. works site information of steel pipe, a curve of D-η is obtained. This method ,which can give us a better estimation, has been compared to site information and other theory. By the curve of D-η, we can conclude the height of soil core, load, stress field and displacement field in other different diameters of open-end steel pipe pile.

引文

[1]李韬,高大钊.开口管桩压入法沉桩土塞效应机理分析[A].中国岩石力学与工程学会青年工作委员会.第七届全国青年岩石力学与工程学术研讨会论文集[C].《地质与勘探》编辑部,2003.273―275.
    [2]俞振全.钢管桩的设计与施工[M].北京:地震出版社,1993.16―26;
    [3]龚晓南.土塑性力学[M].浙江:浙江大学出版社,1990.192―203.