应用圆孔柱扩张理论对预制管桩的挤土效应分析

›› 2007, Vol. 28 ›› Issue (10): 2167-2172.

应用圆孔柱扩张理论对预制管桩的挤土效应分析

刘裕华¹，陈征宙¹，彭志军²，高倚山³，高鹏¹

1.南京大学地球科学系，南京 210093；2.广东航盛工程有限公司，广州 511442；3.华东电力设计院，上海 200002

收稿日期:2005-10-09 出版日期:2007-10-10 发布日期:2013-10-15
作者简介:刘裕华，男，1982年生，硕士研究生，主要从事环境岩土工程方面的研究

Analysis of pile driving effect of precast tubular pile using cylindrical cavity expansion theory

LIU Yu-hua¹, CHEN Zheng-zhou¹, PENG Zhi-jun², GAO Yi-shan³, GAO Peng¹

1. Department of Earthscience, Nanjing University, Nanjing 210093, China; 2. Hangshen Engineering Co. Ltd., Guanzhou 511442, China; 3.East China Electric Power Design Institute, Shanghai 200002, China

Received:2005-10-09 Online:2007-10-10 Published:2013-10-15

摘要/Abstract

摘要： 假定预制管桩在沉桩时的挤土过程是一个有初始孔径的圆柱形孔的扩张过程，初始孔径等于管桩的内径，最终孔径等于管桩外径，应用前人提出的圆孔扩张理论对管桩进行弹塑性分析，得到塑性区半径、土体位移等解析表达式，也对实际工程中常遇到的土塞效应对该理论应用的影响进行了讨论，并对某电厂扩建工程中预制管桩施工引起的土体位移进行计算，通过现场监测，验证了上述解析表达式的合理性，得出可以参考该组解析解来预测预制管桩施工的挤土效应的结论。

关键词: 圆柱孔扩张理论, 预制管桩, 挤土效应, 土塞效应, 土体位移

Abstract: Based on the suppositon of the process of pile driving of Precast Pressure Hollow Pile as the expansion process of cylindrical cavity expansion with initialized aperture and terminal aperture which are respectively equal to inner diameter and external diameter, the expressions of radius of plastical zone, soil displacement are deduced using cylindrical cavity expansion theory; the discussion of plugging effect which appear in the tubular pile costruction offenly is also made. The soil displacements are figured out provoked in the process of precast tubular pile costruction in an electric power plant extend program using the expressions; and the conclusion is come out by checking with data obtained from field monitoring that these expressions are appropriate and could be utilized to forcast the effect of precast tubular pile driving.

Key words: cylindrical cavity expansion theory, precast tubular pile, effect of pile driving, plugging effect, displacement of soil

中图分类号:

TU 473.1+3

刘裕华，陈征宙，彭志军，高倚山，高鹏 . 应用圆孔柱扩张理论对预制管桩的挤土效应分析[J]. , 2007, 28(10): 2167-2172.

LIU Yu-hua , CHEN Zheng-zhou , PENG Zhi-jun , GAO Yi-shan , GAO Peng . Analysis of pile driving effect of precast tubular pile using cylindrical cavity expansion theory[J]. , 2007, 28(10): 2167-2172.

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