A Formula Method to Determine Ratio of Ultimate Shaft Capability in Tension and Compression

Kang Tao; Zhang Xiaoyu

doi:10.3969/j.issn.1007-2993.2014.02.004

Volume 28 Issue 2

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Kang Tao, Zhang Xiaoyu. A Formula Method to Determine Ratio of Ultimate Shaft Capability in Tension and Compression[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2014, 28(2): 70-72. doi: 10.3969/j.issn.1007-2993.2014.02.004

Citation:

Kang Tao, Zhang Xiaoyu. A Formula Method to Determine Ratio of Ultimate Shaft Capability in Tension and Compression[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2014, 28(2): 70-72. doi: 10.3969/j.issn.1007-2993.2014.02.004

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A Formula Method to Determine Ratio of Ultimate Shaft Capability in Tension and Compression

doi: 10.3969/j.issn.1007-2993.2014.02.004

Kang Tao¹,
Zhang Xiaoyu²

1. Jiangsu Transportation Institute, Nanjing 211112, Jiangsu, China;
2. China Coal Technology & Engineering Group Nanjing Design & Research Institute Co., Ltd, Nanjing 210031, Jiangsu, China

Received Date: 2013-10-29
Available Online: 2021-07-19

Abstract

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.