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干湿循环与加载先后顺序对砂泥岩混合料压缩特性的影响

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为研究干湿循环与加载先后顺序对砂泥岩混合料压缩特性的影响,针对不同干湿循环次数、浸水时间和水温处置下的砂泥岩混合料,开展先干湿循环后加载、先加载后干湿循环的单向压缩试验.结果表明,两种试验方法所得砂泥岩混合料压缩量均随干湿循环次数增加、浸水时间增长、水温增高而增大;压缩量与干湿循环次数呈对数关系、与浸水时间呈幂函数关系、与水温呈线性关系,并推导出相应的压缩量计算公式;试验结果及理论分析均得出先干湿循环后加载的压缩量大于先加载后干湿循环的压缩量.
Effect of Wetting-drying Cycles and Loading Sequence on Compression Characteristics of Sandstone-mudstone Particle Mixture
In order to study the influence of dry-wet cycle and loading sequence on the compression characteristics of sandstone-mudstone particle mixture,unidirectional compression tests were carried out for sandstone-mudstone particle mixture treated under different dry-wet cycle times,soaking time and water temperature.The results show that the com-pressibility of sandstone-mudstone particle mixture increases with the increase of dry-wet cycles,soaking time and water temperature.The compressibility presents logarithmic relationship with the number of dry-wet cycles,power function re-lationship with soaking time and linear relationship with water temperature,and the corresponding calculation formula of compressibility is derived.The experimental results and theoretical analysis show that the compressive capacity of loading after wet and dry cycling is greater than that of loading after wet-dry cycling.

sandstone-mudstone particle mixturecompression characteristicstest methoddry-wet cyclesoaking timewater temperature

李辉、王俊杰、向蓉、宋少贤

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重庆交通大学河海学院, 重庆 400074

重庆交通大学材料科学与工程学院, 重庆 400074

重庆市城投基础设施建设有限公司,重庆 400014

重庆市市政设计研究院有限公司, 重庆 400020

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砂泥岩混合料 压缩特性 试验方法 干湿循环 浸水时间 水温

重庆市建设科技计划项目重庆市教委科学技术研究项目重庆市交通科技项目重庆市研究生联合培养基地建设项目

城科字2022第8-12号KHZD-K2020007052022-25JDLHPYJD2018001

2024

水电能源科学
中国水力发电工程学会 华中科技大学 武汉国测三联水电设备有限公司

水电能源科学

CSTPCD北大核心
影响因子:0.525
ISSN:1000-7709
年,卷(期):2024.42(3)
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