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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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

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	Articles by authors
	YUAN Yiqi1
	LAN Hengxing1
	2
	LIU Shijie1
	YAO Jiaming2
	SUN Weifeng1
	BAO Han3
	LI Li4

Cite this article:

YUAN Yiqi1,LAN Hengxing1,2, et al. Spatial-temporal features of thermal induced crack damage in sandstone grottoes[J]. , 2022, 41(12): 2530-2542.

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

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