|本期目录/Table of Contents|

[1]张永刚,李俊才,邓亚光.管桩水泥土复合桩荷载传递机制试验研究[J].南京工业大学学报(自然科学版),2013,35(06):79-85.[doi:10.3969/j.issn.1671-7627.2013.06.017]
 ZHANG Yonggang,LI Juncai,DENG Yaguang.Experimental study of load transfer mechanism of composite pile of jet-mixing cement and PHC pile[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2013,35(06):79-85.[doi:10.3969/j.issn.1671-7627.2013.06.017]
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管桩水泥土复合桩荷载传递机制试验研究()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
35
期数:
2013年06期
页码:
79-85
栏目:
出版日期:
2013-11-20

文章信息/Info

Title:
Experimental study of load transfer mechanism of composite pile of jet-mixing cement and PHC pile
文章编号:
1671-7627(2013)06-0079-07
作者:
张永刚1李俊才1邓亚光2
1. 南京工业大学 交通学院,江苏 南京 210009; 2. 江苏如东水利电力建筑有限公司,江苏 南通 226400
Author(s):
ZHANG Yonggang1LI Juncai1DENG Yaguang2
1. College of Transportation Science & Engineering,Nanjing University of Technology,Nanjing 210009,China; 2. Jiangsu Rudong Water Conservancy and Electric Power Construction Engineering Corporation,Nantong 226400,China
关键词:
管桩 水泥土桩 复合桩 光纤布拉格光栅 荷载传递机制
Keywords:
pipe pile cement pile composite pile fiber bragg grating(FBG) load transfer mechanism
分类号:
TU473.1
DOI:
10.3969/j.issn.1671-7627.2013.06.017
文献标志码:
A
摘要:
为研究管桩水泥土复合桩荷载传递机制,结合工程实例,对其进行现场载荷试验及桩身光纤光栅应力测试。测量了桩身轴力、侧摩阻力及桩端阻力,分析了不同荷载下桩的荷载传递特性,比较该桩型区别于一般管桩的抗力特点。研究表明:管桩是竖向荷载的主要承担者,复合桩工作特性与刚性单桩相似; 复合桩表现出摩擦桩的工作特性,桩端阻力只占桩顶荷载的8.2%~14.8%; 复合桩荷载传递具有双层模式,桩顶荷载由管桩传递到水泥土桩再传递到桩间土并扩散到桩端持力层; 水泥粉喷桩的施工及高强预应力混凝土(PHC)管桩的压入改善了桩周和桩端土体的物理力学性质及应力场分布,从而有效地提高了复合桩的承载力。
Abstract:
To study the load transfer mechanism of composite pile of jet-mixing cement and prestessed high-intensity concrete pile(CPCP),static load and fiber bragg grating stress test were conducted on construction site. Firstly, the axial force,the side friction resistance and the tip resistance of the piles were measured. Then,the load transfer mechanism at different load levels were analyzed and the resistance characteristics between normal pipe pile and CPCP were compared. Results showed that pipe pile carried the majority of vertical load in CPCP and cement pile characteristics was similar to that of rigidity pile,CPCP performed like friction pile, in which the pile end carried about 8.2% to 14.8% of the total load. The load transfer of CPCP presents double-layer mode: load transfers from pipe pile to cement pile. then to surrounding soil,and finally spreaded to the bearing layer. Cement-soil pile and the PHC pile improved the physical mechanical property and stress distribution of surrounding and underlying soil of piles,thus enhancing the bearing capacity of composite pile.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2012-12-20
作者简介:张永刚(1987—),男,江苏连云港人,硕士生,主要研究方向为深基坑工程和复合桩的理论与应用; 李俊才(联系人),教授,E-mail:cyf710826@sina.com..
更新日期/Last Update: 2013-11-30