高压条件下间断级配珊瑚砂–砾混合料力学特性与颗粒破碎研究

doi:10.3724/1000-6915.jrme.2025.0821

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Abstract The coral sand foundations in dredged and reclaimed foundations of South China Sea islands exhibit complex gradation characteristics, with localized strata presenting a sand-gravel mixture. This study investigates the particle breakage and shear characteristics of uniformly graded and gap-graded coral sand-gravel mixtures through a series of high-pressure drained triaxial tests. Experiments were conducted under varying confining pressures, gravel contents, and relative densities. Results demonstrated that gravel content and density significantly influenced the shear strength. Under low confining pressures, the stress-strain curves showed a steeper initial slope, which gradually moderated as the confining pressure increased. The peak principal stress ratio decreased with increasing effective confining pressure. Volumetric strains under high pressures exhibited contractive behavior, intensifying with higher confining pressures. The internal friction angle increased with relative density, peaking at 25% gravel content, while the corresponding apparent cohesion was minimized. Particle breakage intensified with rising confining pressure, and the evolution of particle size distribution followed a pattern characterized by an initially rapid transition followed by gradual stabilization. Furthermore, the peak principal stress ratio decreased progressively with an increase in the relative breakage index. A power function relationship is established between the peak mobilized friction angle and the relative breakage index. Finally, analysis of the stress-dilatancy relationship under high pressure revealed distinct mechanisms of dilatancy behavior under high- versus low-pressure conditions, highlighting the significant impact of gravel content. These findings provide theoretical support for the design and construction of dredged foundation engineering in island and reef environments.

Key words： soil mechanics coral sand-gravel mixtures high pressure triaxial test particle breakage gravel content peak mobilized friction angle

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	Articles by authors
	WU Yang1
	WANG Chuanzhi1
	ZHANG Tao2*
	LI Neng1
	CUI Jie1

Cite this article:

WU Yang1,WANG Chuanzhi1,ZHANG Tao2*, et al. Mechanical behavior and particle breakage of gap-graded coral sand-gravel mixtures under high pressure[J]. , 2026, 45(6): 1869-1879.

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https://rockmech.whrsm.ac.cn/EN/10.3724/1000-6915.jrme.2025.0821 OR https://rockmech.whrsm.ac.cn/EN/Y2026/V45/I6/1869

[1] 汪稔，吴文娟. 珊瑚礁岩土工程地质的探索与研究——从事珊瑚礁研究30年[J]. 工程地质学报，2019，27(1)：202–207.(WANG Ren，WU Wenjuan. Exploration and research on engineering geological properties of coral reefs—engaged in coral reef research for 30 years[J]. Journal of Engineering Geology，2019，27(1)：202–207. (in Chinese))
[2] ZHOU B，KU Q，WANG H B，et al. Particle classification and intra-particle pore structure of carbonate sands[J]. Engineering Geology，2020，279：105889.
[3] KONG D，FONSECA J. Quantification of the morphology of shelly carbonate sands using 3D images[J]. Geotechnique，2017，68(3)：249–261.
[4] 张家铭，张凌，蒋国盛，等. 剪切作用下钙质砂颗粒破碎试验研究[J]. 岩土力学，2008，29(10)：2 789–2 793.(ZHANG Jiaming，ZHANG Ling，JIANG Guosheng，et al. Research on particle crushing of calcareous sands under triaxial shear[J]. Rock and Soil Mechanics，2008，29(10)：2 789–2 793.(in Chinese))
[5] ZHANG T，ZHANG C，SONG F N，et al. Breakage behavior of silica sands during high-pressure triaxial loading using X-ray microtomography[J]. Acta Geotechnica，2023，18(10)：5 195–5 211.
[6] HARDIN B O. Crushing of soil particles[J]. Journal of Geotechnical Engineering，1985，111(10)：1 177–1 192.
[7] 吕亚茹，王冲，黄厚旭，等. 珊瑚砂细观颗粒结构及破碎特性研究[J]. 岩土力学，2021，42(2)：352–360.(LYU Yaru，WANG Chong，HUANG Houxu，et al. Study on particle structure and crushing behaviors of coral sand[J]. Rock and Soil Mechanics，2021，42(2)：352–360.(in Chinese))
[8] 龙蛟，顾琳琳，王振，等. 多次加–卸载条件下考虑颗粒破碎的钙质砂一维压缩特性研究[J]. 水利水运工程学报，2022，(1)：144–150.(LONG Jiao，GU Linlin，WANG Zhen，et al. Study on one-dimensional compression characteristics of calcareoussand considering particle breakage under multiple loading-unloading conditions[J]. Hydro-Science and Engineering，2022，(1)：144–150.(in Chinese))
[9] 吕亚茹，李治中，李浪. 高应力状态下钙质砂的一维压缩特性及试验影响因素分析[J]. 岩石力学与工程学报，2019，38(增1)：3 142–3 150.(LYU Yaru，LI Zhizhong，LI Lang. One-dimensional compression behavior of calcareous sand and its experimental technology under high stress conditions[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(Supp.1)：3 142–3 150.(in Chinese))
[10] 沈扬，沈雪，俞演名，等. 粒组含量对钙质砂压缩变形特性影响的宏细观研究[J]. 岩土力学，2019，40(10)：3 733–3 740.(SHEN Yang，SHEN Xue，YU Yanming，et al. Macro-micro study of compressive deformation properties of calcareous sand with different particle fraction contents[J]. Rock and Soil Mechanics，2019，40(10)：3 733–3 740.(in Chinese))
[11] 黄宏翔，陈育民，王建平，等. 钙质砂抗剪强度特性的环剪试验[J]. 岩土力学，2018，39(6)：2 082–2 088.(HUANG Hongxiang，CHEN Yumin，WANG Jianping，et al. Ring shear tests on shear strength of calcareous sand[J]. Rock and Soil Mechanics，2018，39(6)：2 082–2 088.(in Chinese))
[12] 何建乔，魏厚振，孟庆山，等. 大位移剪切下钙质砂破碎演化特性[J]. 岩土力学，2018，39(1)：165–172.(HE Jianqiao，WEI Houzhen，MENG Qingshan，et al. Evolution of particle breakage of calcareous sand underlarge displacement shearing[J]. Rock and Soil Mechanics，2018，39(1)：165–172.(in Chinese))
[13] 柴维，龙志林，旷杜敏，等. 直剪剪切速率对钙质砂强度及变形特征的影响[J]. 岩土力学，2019，40(增1)：359–366.(CHAI Wei，LONG Zhilin，KUANG Dumin，et al. Effect of shear rate on shear strength and deformation characteristics ofcalcareous sand in direct shear test[J]. Rock and Soil Mechanics，2019，40(Supp.1)：359–366. (in Chinese))
[14] G?UCHOWSKI A，LI L，ISKANDER M. Effect of compression and shear on particlebreakage of silica and calcareous sands[J]. Acta Geotechnica，2024，19(11)：1–27.
[15] 汪轶群，洪义，国振，等. 南海钙质砂宏细观破碎力学特性[J]. 岩土力学，2018，39(1)：199–206.(WANG Yiqun，HONG Yi，GUO Zhen，et al. Micro-and macro-mechanical behavior of crushable calcareoussand in South China Sea[J]. Rock and Soil Mechanics，2018，39(1)：199–206.(in Chinese))
[16] 刘萌成，胡帅峰，戴鹏飞. 南海钙质砂不排水剪切特性三轴试验[J]. 中国公路学报，2022，35(4)：69–76.(LIU Mengcheng，HU Shuaifeng，DAI Pengfei. Investigation on shear behavior of calcareous sand in south China sea in undrained triaxial tests[J]. China Journal of Highway and Transport，2022，35(4)：69–76.(in Chinese))
[17] WU Y，DAI B，LIU P，et al. Investigation of particle size effect on particle breakage of carbonate sand under one-dimensional compression[C]// Proceedings of the IOP Conference Series：Earth and Environmental Science. Shanghai：[s. n.]，2024：012042.
[18] 张季如，陈敬鑫，王磊，等. 三轴剪切过程中排水条件对钙质砂颗粒破碎、变形和强度特性的影响[J]. 岩土力学，2024，45(2)：375–384.(ZHANG Jiru，CHEN Jingxin，WANG Lei，et al. Effect of drainage conditions during triaxial shearing on particle breakage, deformation, and strength properties of calcareous sand[J]. Rock and Soil Mechanics，2024，45(2)：375–384.(in Chinese))
[19] 吴杨，崔杰，李能，等. 岛礁吹填珊瑚砂力学行为与颗粒破碎特性试验研究[J]. 岩土力学，2020，41(10)：3 181–3 191.(WU Yang，CUI Jie，LI Neng，et al. Experimental study on the mechanical behavior and particle breakage characteristics of hydraulic filled coral sand on a coral reef island in the South China Sea[J]. Rock and Soil Mechanics，2020，41(10)：3 181–3 191.(in Chinese))
[20] DING Z，HE S H，SUN Y F，et al. Comparative study on cyclic behavior of marine calcareous sand and terrigenous siliceous sand for transportation infrastructure applications[J]. Construction and Building Materials，2021，283：122740.
[21] YU F. Particle breakage and the drained shear behavior of sands[J]. International Journal of Geomechanics，2017，17(8)：04017041.
[22] LADE P V，BOPP P A. Relative density effects on drained sand behavior at high pressures[J]. Soils and Foundations，2005，45(1)：1–13.
[23] 黄鹏，雷学文，王新志，等. 间断级配珊瑚砂地基渗流侵蚀稳定性试验研究[J]. 岩土力学，2024，45(11)：3 366–3 377.(HUANG Peng，LEI Xuewen，WANG Xinzhi，et al. Stability of seepage erosion in gap-graded coral sand foundation[J]. Rock and Soil Mechanics，2024，45(11)：3 366–3 377.(in Chinese))
[24] 徐刚敏，吴杨，吴毅航，等. 间断级配吹填珊瑚砂剪切和颗粒破碎特性[J]. 土木与环境工程学报(中英文)，2023，45(4)：56–64.(XU Gangmin，WU Yang，WU Yihang，et al. Shear and particle breakage properties of gap-graded coral sands[J]. Journal of Civil and Environmental Engineering，2023，45(4)：56–64.(in Chinese))
[25] KUWAJIMA K，HYODO M，HYDE A F. Pile bearing capacity factors and soil crushabiity[J]. Journal of geotechnical and geoenvironmental engineering，2009，135(7)：901–913.
[26] WU Y H，DAI B B，XU K L，et al. Particle-morphology-based characterization of the breakage behavior of particle assemblies under one-dimensional compression[J]. Acta Geotechnica，2025，20(4)：1 813–1 830.
[27] 中华人民共和国国家标准编写组. GB/T 50123—2019 土工试验方法标准[S]. 北京：中国计划出版社，2019.(The National Standards Compilation Group of People?s Republic of China. GB/T50123—2019 Standard for geotechnical testing method[S]. Beijing：China Planning Press，2019.(in Chinese))
[28] SHAHNAZARI H，REZVANI R. Effective parameters for the particle breakage of calcareous sands：An experimental study[J]. Engineering Geology，2013，159：98–105.
[29] DENG Y F，WU Z L，CUI Y J，et al. Sand fraction effect on hydro-mechanical behavior of sand-clay mixture[J]. Applied Clay Science，2017，135：355–361.
[30] WANG H L，CUI Y J，LAMAS-LOPEZ F，et al. Effects of inclusion contents on resilient modulus and damping ratio of unsaturated track-bed materials[J]. Canadian Geotechnical Journal，2017，54(12)：1 672–1 681.
[31] XU M，SONG E X，CHEN J F. A large triaxial investigation of the stress-path-dependent behavior of compacted rockfill[J]. Acta Geotechnica，2012，7(3)：167–175.
[32] WU Y，WANG C Z，ZHANG T，et al. Breakage and morphology of uniform and gap-graded calcareous sands during high-pressure triaxial shearing[J]. Acta Geotechnica，2025，https：//doi.org/10.1007/s11440-025–02831–4.