乐山大佛基岩酸雨影响评价及防治对策

在酸雨的作用下,大佛砂岩的风化剥蚀作用很强烈,为定量研究酸雨对乐山大佛基岩的影响,实地采集了乐山大佛基岩及乐山酸雨样本,搜集了大量相关资料,进行了模拟酸雨试验。研究表明,乐山大佛早期的新鲜基岩,在长期的风化剥蚀作用下,由外到内形成了粉末层—硬壳层—风化层—新鲜基岩层,这一完整的表层层次结构。这种层次模式是由岩石表面逐渐递次向岩石内部发展的。通过模拟酸雨试验还发现,乐山大佛基岩,在最近30年酸雨的作用下,风化剥蚀作用强烈.,平均剥蚀速率在0.2克/小时·平方米左右,总计被剥蚀厚度约2厘米。提出了应更高度警惕酸雨对乐山大佛裸露基岩的破坏,进一步深化对乐山大佛裸露基岩保护的相应防治对策。

World Cultural,Natural Heritage--The Comment and Countermeasures on the Influence of Acid Rain on the Basic Rock of Grand Buddha

Under the function of acid rain, the weathering denudation of the big Buddha sandstone is very strong, is the impact on big Buddha base rock of Leshan of acid rain of the quantitative research, have gathered the big Buddha base rock of Leshan and Leshan acid rain sample on the spot , has collected a large amount of relevant materials, have imitated the acid rain experiment . Studies have shown , the big Buddha early fresh base rock of Leshan, under the long-term weathering denudation, from outside to in form by powder layer,crust layer, last layer, this intact top layer hierarchical structure. This kind of level mode has rock surface to pass one that is to the rock development once gradually. Through imitate acid rain test and find Leshan old Buddha base rock, under most recent 30 years function of acid rain also, strong to weather denudation, par degrade speed in 0.2 gram per hour, total degrade thickness about 2centimetre. Propose and should watch out for acid rain uncover base destruction of rock to Leshan old Buddha highly even more, deepen and uncover base corresponding prevention and cure countermeasure that rock protects to Leshan old Buddha further.