抗拔系数的一种公式确定法
摘要:抗拔桩作为一种深基础型式已广泛应用于工程领域，但是由于缺乏必要的理论支持，抗拔系数的取值仍然建立在经验的基础上。通过建立静载荷试验和自平衡法两种测试条件下桩体的极限平衡方程，推导出了抗拔系数的简单计算公式，并对其适用条件做了明确的界定。针对公式中的桩径等影响因素进行分析，得出了与工程实践经验相一致的结论。以某工程中的试验桩为例，进行了单桩抗拔极限承载力的预测计算。经与实测数据对比分析后发现：该公式对固结良好的地层层具有较好的适用性。
Abstract:Uplift piles, as one type of deep foundation, have been widely used in various field. But because of lack of a solid theoretical foundation, the value of the ratio of ultimate shaft capability in tension and compression are mainly based on empirical data. Limit equilibrium equations of single pile are established when vertical compressive loading test and self-balance measurement method are carried out. Furthermore, a simple formula, taking into consideration the diameter of piles and the soil properties, is derived to caculate this ratio. Reasonable agreement has been observed between the measured and predicted values of ultimate uplift capacities of piles beared in the strata with better consolidation status.
中文标题：
抗拔系数的一种公式确定法
A Formula Method to Determine Ratio of Ultimate Shaft Capability in Tension and Compression
作者：
康涛1,章晓余2
Kang Tao1,Zhang Xiaoyu2
作者简介:康涛,1979年生,男,陕西渭南人,硕士。E-mail:27993100@qq.com
通讯地址：
1. 江苏省交通科学研究院股份有限公司, 江苏南京 211112; 2. 中煤科工集团南京设计研究院有限公司, 江苏南京 210031
1.JiangsuTransportationInstitute,Nanjing211112,Jiangsu,China; 2.ChinaCoalTechnology&EngineeringGroupNanjingDesign&ResearchInstituteCo.,Ltd,Nanjing210031,Jiangsu,China
中图分类号:TU473.12
doi:10.3969/j.issn.1007-2993.2014.02.004
出版物：岩土工程技术
收稿日期:2013-10-29
网络出版日期:2021-07-19
关键词:抗拔桩,抗拔系数,自平衡试桩法,单桩抗拔极限承载力
Key words:uplift piles,ratio of ultimate shaft capability in tension and compression,self-balance measurement method of pile bearing capacity,vertical ultimate uplift resistance of single pile
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