砂岩石窟热诱导裂纹损伤时空特征与分析

doi:10.13722/j.cnki.jrme.2022.0474

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摘要热诱导裂纹在石窟表面岩体的损伤破坏过程中扮演着极其重要的角色。石窟岩体表面温度变化导致的热诱导裂纹扩展是研究石窟岩体损伤的关键，而目前尚未有针对石窟岩体热诱导裂纹损伤问题的定量评价方法。为了厘清石窟温度变化与热诱导裂纹扩展的联系，采用红外热成像监测与常规监测并行的方法，分析甘肃庆阳北石窟寺的岩体表面温度变化特征，建立基于矿物分布改进的热诱导裂纹评价方法，定量评价石窟岩体热诱导裂纹扩展损伤特征，结合地基SAR监测技术对评价结果进行反演验证。发现红外热成像技术识别出的北石窟寺三处高热诱导裂纹扩展区域与地基SAR监测下的显著形变区域高度重合。红外热成像技术与地基SAR监测技术的创新性结合，可应用于评估长时间序列下石窟崖壁表面热诱导裂纹损伤的时空特征，对石窟保护及风化病害防治具有一定的实际意义。

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	袁逸齐1
	兰恒星1
	2
	刘世杰1
	姚佳明2
	孙巍锋1
	包含3
	李黎4

关键词 ：岩石力学, 砂岩石窟, 热诱导裂纹, 热损伤演化, 时空特征, 红外热成像, 地基SAR监测

Abstract：Thermally induced cracks play an important role in the failure process of grotto rock mass. The crack propagation caused by surface temperature change is key for studying thermal damage. However，no quantitative evaluation method is applied to such studies yet. In this paper，infrared thermography monitoring is used in parallel with normal inspection to analyze the temperature change characteristics of the rock mass surface of North Grottoes temple in Qingyang，Gansu Province. In doing so，the relationship between temperature change and thermally induced crack propagation in grottoes would be clarified. And，based on mineral distribution，an improved thermal crack evaluation method is established to quantitatively evaluate the damage characteristics of thermal crack propagation. Besides，the evaluation results are inversely verified by ground-based SAR monitoring. Three high thermal crack propagation areas in the North Grottoes temple are identified by infrared thermography，which highly coincides with significant deformation areas discovered by ground-based SAR. The innovative combination of infrared thermography and ground-based SAR can be applied to long-time sequence monitoring of the spatial-temporal characteristics of thermal crack damage in grottoes. This method may have practical implication for the protection of grottoes.

Key words： soil mechanics sandstone grottoes thermally induced cracks thermal damage evolution spatial-temporal features infrared thermal imaging ground-based SAR monitoring

引用本文:

袁逸齐1，兰恒星1，2，刘世杰1，姚佳明2，孙巍锋1，包含3，李黎4. 砂岩石窟热诱导裂纹损伤时空特征与分析[J]. 岩石力学与工程学报, 2022, 41(12): 2530-2542.
YUAN Yiqi1，LAN Hengxing1，2，LIU Shijie1，YAO Jiaming2，SUN Weifeng1，BAO Han3，LI Li4. Spatial-temporal features of thermal induced crack damage in sandstone grottoes. , 2022, 41(12): 2530-2542.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2022.0474 或 http://rockmech.whrsm.ac.cn/CN/Y2022/V41/I12/2530

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