Experimental study on bearing characteristics of biocemented coral sand piles in coral sand foundation

SHEN Chun-ni; FANG Xiang-wei; HU Feng-hui; YAO Zhi-hua; LI Yang-yang

doi:10.11779/CJGE2022S1013

Volume 44 Issue S1

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Chinese Journal of Geotechnical Engineering > 2022 > 44(S1): 68-73. > DOI: 10.11779/CJGE2022S1013

SHEN Chun-ni, FANG Xiang-wei, HU Feng-hui, YAO Zhi-hua, LI Yang-yang. Experimental study on bearing characteristics of biocemented coral sand piles in coral sand foundation[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(S1): 68-73. DOI: 10.11779/CJGE2022S1013

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Experimental study on bearing characteristics of biocemented coral sand piles in coral sand foundation

1.
School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China
2.
School of Civil Engineering, Chongqing University, Chongqing 400045, China
3.
Department of Airdrome Construction Engineering, Air Force Engineering University, Xi'an 710038, China
4.
Marine Protection Division of Paracel Islands, Sansha 573100, China

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Received Date: September 27, 2022
Available Online: February 06, 2023

Graphical Abstract

Abstract

Abstract

The biocemented coral sand pile is a new type of pile, which is a pile of coral sand solidified by biocemention reaction. The effects of relative compactness of coral sand foundation on the bearing capacity settlement, axial force and shaft friction, of single pile are studied by the pile load model tests in the coral sand foundation under different relative compactnesses. The test results show that the biocemented coral sand pile has good strength, and the unconfined compression strength of the pile can reach 12 MPa. When the relative compactness of sand between piles increases, the bearing capacity of single pile will be improved and the settlement will be reduced. The axial force of the biocemented coral sand pile decreases with the increase of the relative compactness and the depth of the coral sand foundation. The shaft friction increases with the increase of the relative compactness, while it increases quickly and then decreases slowly with the increase of the depth. The ratio of the pile end reaction to the total load increases with the increase of the relative compactness of the coral sand between the piles. The findings provide the basis for the engineering application of the biocemented coral sand piles.
- biocemented coral sand pile,
- model test,
- bearing capacity,
- settlement,
- axial force,
- shaft friction

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References

[1]	COOP M R. The mechanics of uncemented carbonate sands[J]. Géotechnique, 1990, 40(4): 607–626. doi: 10.1680/geot.1990.40.4.607
[2]	吴京平, 褚瑶, 楼志刚. 颗粒破碎对钙质砂变形及强度特性的影响[J]. 岩土工程学报, 1997, 19(5): 49–55. doi: 10.3321/j.issn:1000-4548.1997.05.008 WU Jing-ping, CHU Yao, LOU Zhi-gang. Influence of particle breakage on deformation and strength properties of calcareous sands[J]. Chinese Journal of Geotechnical Engineering, 1997, 19(5): 49–55. (in Chinese) doi: 10.3321/j.issn:1000-4548.1997.05.008
[3]	NAUROY J, LETIRANT P. Driven piles and drilled and grouted piles in calcareous sands[C]// The 17st Annual Offshore Technology Conference, Houston, 1985: 83–91.
[4]	江浩. 钙质砂中桩基工程承载性状研究[D]. 武汉: 中国科学院研究生院(武汉岩土力学研究所), 2009. JIANG Hao. Research on Bearing Behavior of Pile Foundations in Calcareous Sands[D]. Wuhan: Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, 2009. (in Chinese)
[5]	DEJONG J T, SOGA K, KAVAZANJIAN E, et al. Biogeochemical processes and geotechnical applications: progress, opportunities and challenges[J]. Géotechnique, 2013, 63(4): 287-301. doi: 10.1680/geot.SIP13.P.017
[6]	方祥位, 申春妮, 楚剑, 等. 微生物沉积碳酸钙固化珊瑚砂的试验研究[J]. 岩土力学, 2015, 36(10): 2773–2779. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201510005.htm FANG Xiang-wei, SHEN Chun-ni, CHU Jian, et al. An experimental study of coral sand enhanced through microbially-induced precipitation of calcium carbonate[J]. Rock and Soil Mechanics, 2015, 36(10): 2773–2779. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201510005.htm
[7]	FANG X W, YANG Y, CHEN Z, et al. Influence of fiber content and length on engineering properties of MICP-treated coral sand[J]. Geomicrobiology Journal, 2020, 37(6): 582–594. doi: 10.1080/01490451.2020.1743392
[8]	郑俊杰, 吴超传, 宋杨, 等. MICP胶结钙质砂的强度试验及强度离散性研究[J]. 哈尔滨工程大学学报, 2020, 41(2): 250–256. https://www.cnki.com.cn/Article/CJFDTOTAL-HEBG202002014.htm ZHENG Jun-jie, WU Chao-chuan, SONG Yang, et al. Study of the strength test and strength dispersion of MICP-treated calcareous sand[J]. Journal of Harbin Engineering University, 2020, 41(2): 25–256. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-HEBG202002014.htm
[9]	李昊, 唐朝生, 尹黎阳, 等. MICP-FR协同作用改善钙质砂的力学性能及抗侵蚀试验研究[J]. 岩土工程学报, 2021, 43(10): 1941–1949. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC202110024.htm LI Hao, TANG Chao-sheng, YIN Li-yang, et al. Experimental study on surface erosion resistances and mechanical behavior of MICP-FR-treated calcareous sand[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(10): 1941–1949. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC202110024.htm
[10]	方祥位, 申春妮, 李洋洋, 等. 一种微生物砂桩成桩装置及方法: CN106906821A[P]. 2017-06-30. FANG Xiang-wei, SHEN Chun-ni, LI Yang-yang, et al. Microorganism Sand Pile Forming Device and Method: CN106906821A[P]. 2017-06-30. (in Chinese)
[11]	陈适, 方祥位, 刘汉龙, 等. 微生物珊瑚砂桩单桩复合地基承载特性研究[J]. 地下空间与工程学报, 2019, 15(5): 1475–1481. https://www.cnki.com.cn/Article/CJFDTOTAL-BASE201905025.htm CHEN Shi, FANG Xiang-wei, LIU Han-long, et al. Study on bearing behavior of microbial coral sand single pile composite foundation[J]. Chinese Journal of Underground Space and Engineering, 2019, 15(5): 1475–1481. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-BASE201905025.htm
[12]	建筑桩基技术规范: GJ94—2008[S]. 北京: 中国建筑工业出版社, 2008. Technical Specification for Building Pile Foundation: GJ94—2008[S]. Beijing: China Architecture and Building Press, 2008. (in Chinese)

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