大厚度分层地基中基桩自平衡测试法转换系数研究

兰州理工大学学报 ›› 2026, Vol. 52 ›› Issue (2): 145-150.

大厚度分层地基中基桩自平衡测试法转换系数研究

李伟利^1,2, 张振涛³, 张恩祥^1,2, 蒋宗鑫^1,2, 郭志元^*1,2, 杨阳⁴

1.甘肃中建市政工程勘察设计研究院有限公司, 甘肃兰州 730050;
2.中国市政工程西北设计研究院有限公司, 甘肃兰州 730050;
3.兰州理工大学土木与水利工程学院, 甘肃兰州 730050;
4.陇东学院土木工程学院, 甘肃庆阳 745000

收稿日期:2022-07-21 出版日期:2026-04-28 发布日期:2026-04-28
通讯作者: 郭志元(1988-),男,甘肃古浪人,硕士,高级工程师.Email: guozy00011@126.com
基金资助:
甘肃省自然科学基金(21JR11RM052),甘肃省住房和城乡建设厅科技攻关项目(JK2022-04),甘肃省高等学校青年博士基金(2022QB-045)

Research on conversion coefficient of self-balanced test method in large thickness layered foundation

LI Wei-li^1,2, ZHANG Zhen-tao³, ZHANG En-xiang^1,2, JIANG Zong-xin^1,2GUO Zhi-yuan^1,2, YANG Yang⁴

1. Gansu CSCEC Municipal Engineering Investigation and Design Institute Co., Ltd., Lanzhou 730000, China;
2. CSCEC AECOM Consultants Co., Ltd., Lanzhou 730000, China;
3. School of Civil and Hydraulic Engineering, Lanzhou University of Technology, Lanzhou730050, China;
4. School of Civil Engineering, Longdong University, Qingyang 745000, China

Received:2022-07-21 Online:2026-04-28 Published:2026-04-28

摘要/Abstract

摘要： 为确定大厚度分层地基中转换系数的合理取值范围,以兰州中川国际机场第三期扩建工程为依托,选取地质条件、桩的几何尺寸、施工工艺相近的自平衡试桩和锚桩法试桩对比分析,采用Matlab编程将自平衡试桩的Q-s曲线与锚桩法的Q-s曲线进行拟合,得到与实际工程最接近的γ取值范围.结果表明:对于兰州中川国际机场第三期扩建工程大厚度分层地基中的自平衡试桩,长桩的转换系数在0.45～0.63之间,短桩的转换系数在0.63~0.74之间,自平衡法转换系数的规范建议值及工程实际取值均高于本文拟合值,造成工程浪费.

关键词: 桩基础, 分层地基, 自平衡测试法, 锚桩法, 转换系数

Abstract: In order to determine a reasonable value range of conversion coefficient for the thickness of layered foundation, this study relies on the third phase of the expansion project of Lanzhou Zhongchuan International Airport. Self-balanced test piles and anchor-pile test piles with similar geological conditions, pile geometry, and construction methods were selected for comparative analysis. Using Matlab programming, the Q -s curves obtained from self-balanced tests were fitted to those from anchor-pile tests to identify the conversion coefficient range that best reflects actual engineering behavior. The results show that, for the self-balancing test piles in the large thickness layered foundation of the project area, the conversion coefficients ranges from 0.45 to 0.63 for long piles, and from 0.63 to 0.74 for short piles. Notably, both the proposed values of the self-balancing method and the actual values of the conversion coefficients are higher than the fitted values obtained in this study, resulting in engineering waste.

Key words: pile foundation, layered foundation, self-balance test method, anchor pile method, conversion coefficient

中图分类号:

TU473.1

李伟利, 张振涛, 张恩祥, 蒋宗鑫, 郭志元, 杨阳. 大厚度分层地基中基桩自平衡测试法转换系数研究[J]. 兰州理工大学学报, 2026, 52(2): 145-150.

LI Wei-li, ZHANG Zhen-tao, ZHANG En-xiang, JIANG Zong-xinGUO Zhi-yuan, YANG Yang. Research on conversion coefficient of self-balanced test method in large thickness layered foundation[J]. Journal of Lanzhou University of Technology, 2026, 52(2): 145-150.

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链接本文: https://journal.lut.edu.cn/CN/

https://journal.lut.edu.cn/CN/Y2026/V52/I2/145

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