Experimental Study on Compressive Bearing Capacity of Helical Steel Grounting Pipe Piles

ZONG Zhongling; CAO Bo; HUANG Yunhan; ZHUANG Xiaoxuan; ZHANG Kui; LIN Xiangjun

doi:10.13204/j.gyjzG21060812

Volume 52 Issue 6

Sep. 2022

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2022 > 52(6): 127-132

Sun Tong, Wang Shi-qi, Hu Xia-min, Luo Wu-jian. RESEARCHES ON THE CALCULATION METHOD FOR BEARING CAPACITY OF CONCRETE FILLED STEEL TUBULAR COLUMNS UNDER ECCENTRIC LOAD[J]. INDUSTRIAL CONSTRUCTION, 2006, 36(5): 95-98. doi: 10.13204/j.gyjz200605025

Citation:

ZONG Zhongling, CAO Bo, HUANG Yunhan, ZHUANG Xiaoxuan, ZHANG Kui, LIN Xiangjun. Experimental Study on Compressive Bearing Capacity of Helical Steel Grounting Pipe Piles[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(6): 127-132. doi: 10.13204/j.gyjzG21060812

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Experimental Study on Compressive Bearing Capacity of Helical Steel Grounting Pipe Piles

doi: 10.13204/j.gyjzG21060812

1. College of Civil and Harbor Engineering, Jiangsu Ocean University, Lianyungang 222002, China;
2. State Grid Lianyungang Power Supply Company, Lianyungang 222000, China

Received Date: 2021-06-08
Available Online: 2022-09-05

Abstract

Abstract

Aiming at the problems for instability and durability of halical steel pipe piles in deep marine soft soil, a helical steel grouting pipe pile was proposed. A two-stage test was designed. In the first stage, different tested piles were used for pile-forming tests to verify the feasibility of pile-forming processes. The influence of sleeves and grouting methods on pile-forming quality was analyzed, and the pile type design and the pile-forming process were optimized. In the second stage, the influence of sleaves and grouting methods on the ultimate bearing capacity of helical steel grounting pipe piles was studied by the compressive bearing capacity tests of improved single piles. The curves of loads and settlement displacement at pile tops and the typical failure characteristics of piles were obtained, and the variation characteristics of pile-soil interaction for helical steel grounting pipe piles were analyzed. Finally, the experimental results were compared with the calculation results by Chance^@ Civil Construction: Technical Design Manual compiled by Hubbell Power Systems, Inc. and Micropile Design and Construction Reference Manual issued by Federal Highway Administration of America. The test results showed that the helical paddles expanded the diameters of cemented grouting slurry and sleeves could effectively enhance the stability of piles. The grouting effect was significant and the full-section rotary jet grouting method could significantly increase the bearing capacity of piles under vertical compression.
- helical steel pile,
- pressure grouting,
- sleeve,
- process of piling construction,
- loading test

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References

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