没有合适的资源?快使用搜索试试~ 我知道了~
资源推荐
资源详情
资源评论
Study on the evaluation method of
weathering degree of limestone
artifacts in Zhejiang area
Candidate:
Supervisor:
浙江地区石灰岩质文物风化程度评价方法研究
论文作者签名
:
指导教师签名
:
论文评阅人 1:
评阅人 2:
评阅人 3:
评阅人 4
:
评阅人 5:
答辩委员会主席:
委员 1:
委员 2:
委员 3
:
委员 4
:
委员 5:
Study on the evaluation method of weathering degree of
limestone artifacts in Zhejiang area
Candidate’s signature:
Supervisor’s signature:
Thesis reviewer 1:
Thesis reviewer 2:
Thesis reviewer 3:
Thesis reviewer 4
:
Thesis reviewer 5:
浙江科技学院硕士学位论文 摘要
I
摘 要
浙江省内存在许多石窟寺和摩崖造像,这些石质文物的材质多为石灰岩和凝
灰岩质。本文调查了浙江地区典型石灰岩质文物的现状,发现许多文物表面存在
诸多病害,文物本体损害严重,亟需根据文物的风化程度采取相应的预防性保护
措施。目前对于石灰岩质文物风化程度评价方法研究的针对性不强,缺少一种定
量且完全无损的方法去评价其风化程度。
本文通过百佛岩造像所处微环境的监测结果,设计了符合浙江地区石灰岩质
文物所处环境的模拟风化试验。通过试验得到不同风化程度的石灰岩岩样,研究
其表层强度、超声波纵波波速与其表层吸水率以及孔隙率之间的变化规律,并建
立拟合函数。通过拟合效果分析基于表层吸水率和孔隙率的石灰岩质文物风化程
度评价方法可行性。在此基础上,设置不同湿度的检测环境,研究湿度环境对石
灰岩表层吸水率的影响。本文还通过室内试验,将 matlab 软件的图像处理功能
与便携式显微镜相结合,建立岩石表层孔隙率的无损检测方法。此外,由于室内
试验岩样较少,拟合规律说服力不足。本文对石灰岩质文物展开风化程度评价方
法原位测试研究,获取大量真实数据。最后将所得到的拟合规律结合现有规范建
立以表层吸水率为主孔隙率为辅的石灰岩质文物风化程度评价方法,并进行印证,
结果表明:本文最终建立的评价方法是可行的。取得以下研究成果:
(1)通过模拟风化试验拟合出不同湿度环境下石灰岩表层强度、超声波纵
波波速与其表层吸水率和孔隙率之间的函数表达式,拟合函数式的决定系数表明:
石灰岩表层强度、纵波波速与吸水率以及孔隙率之间都具有较强的负相关性。
(2)将 matlab 软件图像处理功能与便携式显微镜相结合建立了岩石表层孔
隙率无损检测方法,计算出的孔隙率与排水法试验得到的孔隙率值平均偏差为 4.
7%,检测方法可行。
(3)环境湿度对于石灰岩表层吸水率影响较大,70%湿度环境下的表层吸
水率比 60%湿度环境降低 25.7%,石灰岩质文物原位测试中也降低了 15.7%。
(4)本文建立了以表层吸水率为主,孔隙率为辅的石灰岩质文物风化程度
评价方法,并在不同湿度环境下进行印证,发现评价结果与现有规范评价结果几
乎一致。
关键词:石质文物,风化程度,评价方法,表层吸水率,孔隙率
浙江科技学院硕士学位论文 Abstract
III
Abstract
There are many cave temples and cliff statues in Zhejiang Province, and these
stone relics are mostly made of limestone and tuff. This paper investigates the current
situation of typical limestone artifacts in Zhejiang, and finds that many of them have
many surface diseases and serious damage to the artifacts themselves, which urgently
require preventive conservation measures according to the weathering degree of the
artifacts. The current research on the evaluation method of weathering degree of
limestone artifacts is not targeted, and there is a lack of a quantitative and completely
non-destructive method to evaluate the weathering degree.
In this paper, we designed a simulated weathering test for limestone artifacts in
the Zhejiang area by monitoring the microenvironment in which the Baifu Rock statue
is located. Limestone samples with different degrees of weathering were obtained,
and the variation patterns between the surface layer strength, ultrasonic longitudinal
wave velocity and its surface layer water absorption rate and porosity were studied,
and a fitting function was established. The feasibility of the evaluation method of the
weathering degree of limestone artifacts based on the surface water absorption rate
and porosity was analyzed through the fitting effect. On this basis, different humidity
testing environments are set up to study the influence of humidity environment on the
water absorption rate of limestone surface layer. This paper also combines the image
processing function of matlab software with portable microscope through indoor tests
to establish a nondestructive detection method for the porosity of rock surface layers.
In addition, due to the small number of rock samples in the indoor test, the fitting law
is not convincing enough. In this paper, the in situ test research on the evaluation
method of weathering degree of limestone artifacts is launched to obtain a large
amount of real data. Finally, the obtained fitting law is combined with the existing
specification to establish the evaluation method of weathering degree of limestone
artifacts with the surface water absorption rate as the main porosity, and the results
are corroborated, which show that the evaluation method finally established in this
paper is feasible. The following research results were obtained:
剩余72页未读,继续阅读
资源评论
2201_75761617
- 粉丝: 21
- 资源: 7339
上传资源 快速赚钱
- 我的内容管理 展开
- 我的资源 快来上传第一个资源
- 我的收益 登录查看自己的收益
- 我的积分 登录查看自己的积分
- 我的C币 登录后查看C币余额
- 我的收藏
- 我的下载
- 下载帮助
安全验证
文档复制为VIP权益,开通VIP直接复制
信息提交成功