自平衡试桩法在沿海软弱地层中的试验研究

海洋学研究 ›› 2013, Vol. 31 ›› Issue (4): 37-43.

自平衡试桩法在沿海软弱地层中的试验研究

罗士瑾¹, 程传国^*2,3, 张海丰^2,3, 郭立瓴⁴, 赵建铧⁵

1.浙江金基置业有限公司,浙江杭州 310016;
2.国家海洋局第二海洋研究所,浙江杭州 310012;
3.国家海洋局第二海洋研究所工程海洋学重点实验室,浙江杭州 310012;
4.浙江瑞邦建设工程检测有限公司,浙江杭州 310013;
5.浙江交科工程检测有限公司,浙江杭州 311215

收稿日期:2013-05-23 修回日期:2013-08-08 出版日期:2013-12-15 发布日期:2022-11-29
通讯作者: *程传国,高级工程师,注册岩土工程师,E-mail:ccg_ok@163.com
作者简介:罗士瑾(1980-),男,浙江杭州市人,主要从事土木工程方面的研究。E-mail:rose-312@163.com
基金资助:
浙江省交通厅科技基金项目资助(2005H008)

Experimental study on self-balanced test method in soft strata in the coastal area

LUO Shi-jin¹, CHENG Chuan-guo^*2,3, ZHANG Hai-feng^2,3, GUO Li-ling⁴, ZHAO Jian-hua⁵

1. Zhejiang J&J Real Estate Co.,Ltd, Hangzhou 310016, China;
2. The Second Institute of Oceanography, SOA, Hangzhou 310012, China;
3. Key Laboratory of Engineering Oceanography, The Second Institute of Oceanography, SOA, Hangzhou 310012, China;
4. Zhejiang Reborn Inspection of Construction Engineering Co., Ltd, Hangzhou 310013, China;
5. Zhejiang Traffic Detection Co., Ltd, Hangzhou 311215, China

Received:2013-05-23 Revised:2013-08-08 Online:2013-12-15 Published:2022-11-29

摘要/Abstract

摘要： 以浙江舟山大陆连岛工程宁波连接线项目为依托,选择1根典型摩擦桩开展了自平衡试桩法在沿海软弱地层中的试验研究,并对自平衡测试后的试桩进行了传统桩顶堆载验证试验。介绍了自平衡试桩法从设计、现场试验及数据分析的全过程及各阶段的设计要点,并对容易引起测量误差的现有位移测量方法进行了改进,避免了易发缺陷的荷载箱处虚位移的影响。试验测得了试桩的负摩阻力系数值及单桩承载力值,其结果符合试验设计要求,试桩承载力满足设计要求,相关试验设计及测得的参数可以作为此类地层中自平衡测试的参考。经与传统桩顶堆载验证试验对比可知,自平衡试桩法在工程上的应用具有合理性与准确性。

关键词: 自平衡试桩法, 沿海软弱地层, 桩基承载力, 试验研究

Abstract: Based on the connecting line project of Zhoushan Island-Mainland Link Project, the experiment of a friction pile was developed to study the application of self-balanced test method in soft strata,and it was verified with the traditional piling-up weights method. The paper introduced the whole process and design points of the method in design, field test and data analysis stage. And an improved method for the use to measure the displacements of the upper and lower shaft was put forword. This new method can avoid the influence of the latent concrete defect in the cell position. The coefficient of negative skin friction in soft strata and the bearing capacity of the test pile was also measured in the experiment. The test results fit the designed requirements, while the bearing capacity of the test pile also meet the designed requirements. This design and the coefficient can be a reference for the soft strata, and the self-balanced test method has its rationality and accuracy in engineering application.

Key words: self-balanced test method, soft strata in the coastal area, bearing capacity of the test pile, experimental study

中图分类号:

TU473.1

罗士瑾, 程传国, 张海丰, 郭立瓴, 赵建铧. 自平衡试桩法在沿海软弱地层中的试验研究[J]. 海洋学研究, 2013, 31(4): 37-43.

LUO Shi-jin, CHENG Chuan-guo, ZHANG Hai-feng, GUO Li-ling, ZHAO Jian-hua. Experimental study on self-balanced test method in soft strata in the coastal area[J]. Journal of Marine Sciences, 2013, 31(4): 37-43.

参考文献

[1] JORI Osterberg. New device for load testing driven piles and dirlled shaft separates frictiong and end bearing[J]. Piling and Deep Foundations,1989(1):421-427.
[2] LUO Qi-xian.Manual of engineering testings and inspections of Pile[M]. Beijing:China Communication Press,2003:43-53.
罗骐先.桩基工程检测手册[M]. 北京:人民交通出版社,2003:43-53.
[3] XU Jin-fa,GONG Wei-ming.Testing technology for self-balanced measurement method of pile bearing capacity[J].Jiangsu Traffic Engineering,1998(2):28-31.
徐金发,龚维明.桩承载力自平衡测试技术[J].江苏交通工程,1998(2):28-31.
[4] QI Jing-jing,XU Ri-qing,GONG Wei-ming,et al.Research on conversion method of self-balanced pile test in collapsible loess[J].Journal of Zhejiang University:Engineering Science,2006,40(12):2 196-2 220.
齐静静,徐日庆,龚维明,等.湿陷性黄土地区自平衡测试结果转换方法研究[J].浙江大学学报:工学版,2006,40(12):2 196-2 220.
[5] XU Feng-yun.Query about the reliability of self-balanced test method[J].Highway,2004(7):12-19.
徐风云.桩承载力自平衡法的可靠性之质疑[J].公路,2004(7):12-19.
[6] GONG Wei-ming,DAI Guo-liang.Discussion on several key questions about the self-balanced test method[J].Highway,2005(8):24-27.
龚维明,戴国亮.桩承载力自平衡法的几个关键问题讨论[J].公路,2005(8):24-27.
[7] GONG Wei-ming.Reply to the discussion on “Query about the reliability of self-balanced test method”[J].Highway,2004(10):81-86.
龚维明.关于“桩承载力自平衡法的可靠性之质疑”的讨论的答复[J].公路,2004(10):81-86.
[8] WU Peng,GONG Wei-ming,LIANG Shu-ting.Reliability of self-balanced test method for determining bearing capacity of piles[J].Chinese Journal of Geotechnical Engineering,2005,27(5):545-548.
吴鹏,龚维明,梁书亭.桩基自平衡测试的可靠性分析[J].岩土工程学报,2005,27(5):545-548.
[9] XU Chang-jie,LI Bi-qing,CAI Yuan-qiang.Bearing behaviors of self-balanced pile[J].Journal of Zhejiang University :Engineering Science,2012,46(7):1 262-1 268.
徐长节,李碧青,蔡袁强.自平衡法试桩的承载特性试验研究[J].浙江大学学报:工学版,2012,46(7):1 262-1 268.
[10] YANG You-lian,ZHU Jun-gao.Numercial experiment on conversion coefficient of self-balanced pile test method[J].Advance in Science and Technology of Water Resources,2008,28(1):8-11.
杨有莲,朱俊高.自平衡试桩转换系数数值试验[J].水利水电科技进展,2008,28(1):8-11.
[11] TAO Gui-lan,WU Wen-cong.Numerical simulation analysis of load-displancement curves using self-balanced testing method[J].Journal of Waterway and Harbor,2010,31(5):399-402.
陶桂兰,吴文聪.自平衡法荷载沉降曲线的数值模拟分析[J].水道港口,2010,31(5):399-402.
[12] LU Bo,GONG Wei-ming,JIANG Yong-sheng,et al.Application and constrast analysis on self-balanced testing method for bearing capacity test of PHC pipe pile[J].Archeitecture Technology,2007,38(3):166-169.
卢波,龚维明,蒋永生,等.自平衡法在预应力管桩承载力测试中的应用和对比分析[J].建筑技术,2007,38(3):166-169.
[13] GE Yun-feng,HUANG Sheng-gen,HUO Shao-lei. A displacement measurement devices for self-balanced testing method:Chinese,CN200920086024.8[P].2010-05-12.
葛云峰,黄生根,霍少磊.一种用于自平衡试桩法的位移采集装置:中国,CN200920086024.8[P].2010-05-12.
[14] JGJ 106—2003 Technical code for testing of building foundation piles[S].2003.
JGJ 106—2003建筑基桩检测技术规范[S].2003.
[15] JTT 738—2009 Static loading test of foundation pile: Self-balanced method[S].2009.
JTT 738—2009 基桩静载试验:自平衡[S].2009.