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[1]曹琰波*,张枭,范文,等.强风化千枚岩堆积层水分迁移规律及渗透特性[J].地球科学与环境学报,2025,47(04):555-569.[doi:10.19814/j.jese.2024.12018]
　CAO Yan-bo*,ZHANG Xiao,FAN Wen,et al.Moisture Migration Mechanisms and Permeability Characteristics of Highly Weathered Phyllite Depositional Layers[J].Journal of Earth Sciences and Environment,2025,47(04):555-569.[doi:10.19814/j.jese.2024.12018]
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强风化千枚岩堆积层水分迁移规律及渗透特性(PDF)
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第47卷
期数:
2025年第04期
页码:
555-569
栏目:
黄河流域生态保护和高质量发展专刊(下)
出版日期:
2025-07-15

文章信息/Info

Title:
Moisture Migration Mechanisms and Permeability Characteristics of Highly Weathered Phyllite Depositional Layers
文章编号:
1672-6561(2025)04-0555-15
作者:
曹琰波1; 2*; 张枭1; 范文1; 2; 南亚林2; 赵佳楠1
(1. 长安大学 地质工程与测绘学院,陕西 西安 710054; 2. 信电综合勘察设计研究院有限公司,陕西 西安 710054)
Author(s):
CAO Yan-bo1; 2*; ZHANG Xiao1; FAN Wen1; 2; NAN Ya-lin2; ZHAO Jia-nan1
(1. School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, Shaanxi, China; 2. China DK Comprehensive Engineering Investigation and Design Research Institute Co., Ltd., Xi'an 710054, Shaanxi, China)
关键词:
千枚岩;  水分迁移;  湿润锋;  定向性;  级配;  渗透系数;  陕西
Keywords:
phyllite;  moisture migration;  wetting front;  orientation;  granular composition;  permeability coefficient;  Shaanxi
分类号:
P642.2
DOI:
10.19814/j.jese.2024.12018
文献标志码:
A
摘要:
千枚岩堆积层斜坡广泛分布于我国秦巴山区,降雨入渗是诱发其发生滑动变形的重要因素。为探究强风化千枚岩堆积层的入渗规律及其渗透特性,通过开展5组不同岩块定向角和级配条件下的一维垂直渗透试验,基于湿润锋前进法分析了水分迁移规律及相关特性,重点研究了含水率与基质吸力的时程变化、湿润锋前进距离与速度的动态演化以及渗透系数的函数关系曲线。结果表明:①当岩块定向角为0°时,湿润锋前进速度显著低于岩块定向角为30°和60°时; ②湿润锋前进速度受控于基质粒径及级配特征,渗透性随着岩块倾角的增大而增强,与细颗粒含量成显著负相关关系; ③堆积层中细颗粒相对含量越高,其渗透能力越弱,反之则渗透能力越强; ④湿润锋前进速度与时间成对数衰减关系,随着水分的入渗逐渐降低; ⑤渗透系数在高基质吸力范围内表现为基质吸力越大,渗透系数越低,基质吸力减小时渗透系数趋于平稳。最后,采用Gardner渗透模型对实测数据进行拟合,结果显示该模型效果较优。
Abstract:
Strongly weathered phyllite depositional layer slopes are widely distributed in Qinling-Daba mountains, where rainfall infiltration is a critical factor inducing landslides. To investigate the infiltration mechanism and permeability characteristics of phyllite depositional layers, five groups of one-dimensional vertical infiltration tests were conducted under different rock orientation angles and granular composition conditions; using the wetting front advance method, the moisture migration mechanisms and related characteristics were analyzed, focusing on the temporal evolution of water content and matric suction, the dynamics of wetting front advance distance and velocity, and the functional relationship of permeability coefficient. The results show that ① the wetting front advance velocity at an rock orientation angle of 0° is significantly lower than that at the rock orientation angles of 30° and 60°; ② within a certain range, the wetting front advance velocity is primarily influenced by particle size and granular composition; the permeability coefficient is positively correlated with the rock block angle, and negatively correlated with fine particle content; ③ higher relative fine particle content in the depositional layer weakens permeability, while lower fine particle content enhances it; ④ the wetting front advance velocity exhibits a logarithmic decay over time, decreasing gradually with water infiltration; ⑤ in the high range of matric suction, the permeability coefficient decreases with increasing suction and stabilizes as suction decreases. Finally, the Gardner permeability model shows good agreement with the measured data.

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备注/Memo

备注/Memo:
收稿日期:2024-12-11; 修回日期:2025-03-18
基金项目:国家重点研发计划项目(2022YFC3003401); 陕西省重点研发计划项目(2019ZDLSF07-0701); 国家自然科学基金项目(41402254)
*通信作者:曹琰波(1982-),男,陕西清涧人,长安大学副教授,工学博士,E-mail:caoyanbo@chd.edu.cn。
通信作者:范 文(1967-),男,内蒙古武川人,长安大学教授,博士研究生导师,工学博士,博士后,E-mail:fanwen@chd.edu.cn。
更新日期/Last Update: 2025-07-25