乐山麻浩崖墓石刻风化机理研究

Research on the Weathering Mechanism of Stone Carvings on Leshan Mahao Cliff Tomb

通过对乐山麻浩崖墓的病害及现状勘察、岩样物理力学性能检测、岩样薄片鉴定、矿物成分分析、苔藓植物分离鉴定、室内模拟实验,探讨了崖墓岩石内部因素和各种外部环境因素对其风化作用的机理。得出岩石结构特性是决定崖墓石刻风化的内在决定因素,而水害、可溶盐、酸雨及温湿度交替变化等外界因素则是影响崖墓石刻风化的主要外因,它们在一定条件下相互促进,共同发挥作用,促使其产生酥碱、粉化、龟裂起翘、表面泛盐、片状剥落及表面溶蚀等风化病害。麻浩崖墓石刻风化机理的研究,为对其科学保护提供了理论依据。

Through the investigation of present diseases of Leshan Mahao Tomb,physical and mechanical properties of rock sample,thin section identification of rock sample,mineral composition analysis,isolation and identification of bryophytes,indoor simulation experiment,the thesis discusses the internal factors of rocks and various external environment factors on the mechanism of weathering on Leshan Mahao Cliff Tomb.The conclusion is the structural characteristics of rock are the internal determinant for the weathering of stone carvings,and water disasters,soluble salt,acid rain,and alternation of temperature and humidity are the external factors.They promote each other under certain conditions,work together,inducing the weathering diseases such as efflorescence,warping,pulverization,cracking,surface suffused with salt,exfoliation,and surface corrosion etc.Through the researches on the weathering mechanism of stone carvings on Mahao Cliff Tomb,the theoretical basis is provided for the scientific protection for it.