崔凯, 王珮, 谌文武, 吴国鹏. 2019: 不同干湿作用下斜坡表层千枚岩劣化实验研究. 工程地质学报, 27(2): 230-238. DOI: 10.13544/j.cnki.jeg.2018-020
    引用本文: 崔凯, 王珮, 谌文武, 吴国鹏. 2019: 不同干湿作用下斜坡表层千枚岩劣化实验研究. 工程地质学报, 27(2): 230-238. DOI: 10.13544/j.cnki.jeg.2018-020
    CUI Kai, WANG Pei, CHEN Wenwu, WU Guopeng. 2019: EXPERIMENTAL STUDY ON DETERIORATION OF PHYLLITE FROM SLOPE SURFACE UNDER CONDITIONS OF DIFFREENT DRY-WET CYCLES. JOURNAL OF ENGINEERING GEOLOGY, 27(2): 230-238. DOI: 10.13544/j.cnki.jeg.2018-020
    Citation: CUI Kai, WANG Pei, CHEN Wenwu, WU Guopeng. 2019: EXPERIMENTAL STUDY ON DETERIORATION OF PHYLLITE FROM SLOPE SURFACE UNDER CONDITIONS OF DIFFREENT DRY-WET CYCLES. JOURNAL OF ENGINEERING GEOLOGY, 27(2): 230-238. DOI: 10.13544/j.cnki.jeg.2018-020

    不同干湿作用下斜坡表层千枚岩劣化实验研究

    EXPERIMENTAL STUDY ON DETERIORATION OF PHYLLITE FROM SLOPE SURFACE UNDER CONDITIONS OF DIFFREENT DRY-WET CYCLES

    • 摘要: 甘肃白龙江流域、四川嘉陵江流域和云南小江流域等地区干湿气候特征复杂,泥石流沟道中边坡表层千枚岩易受干湿作用影响,发生崩塌脱落,为该类区域泥石流提供了丰富的物源物质。通过对研究区气候条件进行调查,选取极干-极湿、常规干湿、日常干湿等3种对岩石破坏极为有利的干湿条件,以泥石流沟壁表层千枚岩为研究对象,对其进行上述3种干湿条件养护,对循环后岩样的宏观形态、质量、纵波波速进行测试,并结合单轴无侧限抗压实验以及与新生成分的矿物分析,阐述了千枚岩分别在不同干湿作用下的劣化响应行为与机理,揭示了斜坡表层千枚岩对极干-极湿条件的劣化响应行为优于其他干湿作用的规律,为该地区泥石流灾害的区划评价和防治提供有益的参考。

       

      Abstract: The places in Gansu Bailong, Sichuan Jialing and Yunan Xiaojiang river basin have complex dry-wet climate characteristics. Phyllite slope in debris flow gully is easily affected by dry-wet climate, which can cause the collapse of the slopes. The slope collapses provide rich source materials for debris flow in such areas. After investigated the climate conditions in the study area, we select 3 kinds of conditions:common condition, dry-wet condition and extreme dry-wet condition. These three conditions are very beneficial to rock breaking. The phyllite in the surface of debris flow is the research object. And these three kinds of condition are taken as the experimental conditions. After dry-wet cycles maintenance, we carry out macroscopic observation of samples. We also test their quality-rate of change, elastic wave velocity, uniaxial compressive strength, analyzed new components of phyllite. After the observation and tests, we get some results. They explain that under different dry-wet circulations the degradation behavior and mechanism of phyllite are different. These results also reveal that the best influent factor is the extreme dry-wet. It provides a useful reference for regional evaluation and prevention of debris flow disaster in the study area.

       

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