循环作用对马蹄寺石窟群岩体性能的影响
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中铁西北科学研究院有限公司

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P642

基金项目:

中铁科学研究院重点创新项目“水-岩作用下岩石文物的劣化效应及防水保护技术研究(2018-KJ005-Z005-XB)”


Cycling Effect on Rock Mass Properties of Mati Temple Grottoes
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Northwest Research Institute Co.Ltd. of China Railway Engineering Corporation

Fund Project:

Key Innovation Program of China Railway Academy "Study on Deterioration Effect and Waterproof Protection Technology of Rock Cultural Relics under Water-Rock Action(2018-KJ005-Z005-XB)"

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    摘要:

    马蹄寺石窟群地处河西走廊中部,气候条件十分恶劣。由于常年受到温度、湿度、酸碱盐等作用的影响,石窟岩体性能出现了不同程度的劣化现象。通过开展室内模拟试验,研究以上多种恶劣环境的循环作用对于岩体抗压强度、波速、质量的影响规律,同时使用X射线衍射仪(XRD)、X射线荧光光谱(XRF)和扫描电子显微镜(SEM)对循环作用过程中样品的矿物组分、元素含量和微观形貌进行分析研究。研究结果表明,循环作用使样品中的长石类矿物和方解石含量降低,粘土类矿物含量增加,胶结程度下降,孔隙逐渐发展成为横向微裂隙,导致样品的性能出现不同程度的劣化现象。循环作用对岩体性能的影响程度从大到小分别为:冻融循环、耐盐循环、耐碱循环、耐酸循环和温湿循环。

    Abstract:

    Mati temple grottoes located in Gansu Corridor, the weather conditions of this area are harsh. The properties of rock mass got to worse due to several effects such as temperature, humidity, acid, alkali and salt. Simulation tests were used to study the relationship between the properties of rock mass and cycling tests, and XRD, XRF and SEM were also used to study the composition and morphology of the samples. The results show that the properties of samples weakened due to the changes of mineral contents and micro-structure during the cycling tests. The influences from greatest to least are free-thawing cycles, salt resistance cycles, acid resistance cycles, alkali resistance cycles and temperature-humidity cycles.

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引用本文

乔榛. 循环作用对马蹄寺石窟群岩体性能的影响[J]. 科学技术与工程, 2019, 19(28): 64-70.
Qiao Zhen. Cycling Effect on Rock Mass Properties of Mati Temple Grottoes[J]. Science Technology and Engineering,2019,19(28):64-70.

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  • 收稿日期:2019-01-14
  • 最后修改日期:2019-03-11
  • 录用日期:2019-04-17
  • 在线发布日期: 2019-11-20
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