1.上海师范大学 建筑工程学院，上海 201418;2.长沙理工大学 交通运输工程学院，长沙 411000
钟华锹（1998—），男，硕士研究生，主要从事岩土工程方向的研究，(E-mail)1000525982@smail.shnu.edu.cn。
姚传芹，女，主要从事热化学效应对岩土体物理力学性质的影响方向的研究，(E-mail)cqyao@shnu.edu.cn。
国家重点研发计划资助项目（2019YFC1520600）；上海市青年科技英才扬帆计划资助项目（21YF1432700）。
1.School of Civil Engineering, Shanghai Normal University, Shanghai201418, P. R. China;2.School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha410114, P. R. China
Supported by National Key R&D Program of China(2019YFC1520600) and Shanghai Sailing Program (21YF1432700).
石窟寺长期遭受自然与人为因素破坏，往往会出现多种类型病害。其中，盐害是一种破坏性较大的病害，在表面泛盐阶段对其开展病害程度的量化评估对石窟寺保护利用工作具有重要意义。以甘肃省庆阳市北石窟寺为研究对象，使用PFC 2D软件建立表面泛盐病害模型。采用主动式热红外检测技术并施加外部热源，获取不同泛盐厚度处的升温曲线。结果表明，在相同热激励条件下砂岩表面的温度低于泛盐表面的温度，且泛盐越厚其表面温度越高。归一化后的温度-时间曲线可以使用幂函数拟合，且幂函数指数与泛盐厚度呈现明显的负相关线性关系；可以将其作为升温指数，实现泛盐病害程度的定量化评估。
Grotto temples face extensive damage from natural factors and human activities and salt erosion is a critical issue. Quantifying the damage extent in surface salt efflorescence stage is crucial for subsequent preservation efforts. This study investigates salt efflorescence in the North Grotto Temple in Qingyang City, Gansu Province, employing PFC 2D software to simulate surface salt formation. Active thermal infrared detection is used to examine the relationship between temperature changes and efflorescence thickness. Results indicate that when subjected to identical stimuli, the temperature of sandstone surface is lower than that of saltated surfaces and surface temperature increases as salt efflorescence thickness increases. A power function fitting the normalized temperature-time curves reveales a notable negative linear relationship between the exponent and salt efflorescence thickness. This exponent can serve as a warming index, realizing the quantitative assessment of salt efflorescence damage.
钟华锹,赵嘉进,姚传芹,张得煊,李希.石窟寺表面泛盐病害热学响应的离散元模拟[J].重庆大学学报,2024,47(10):110-119.
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