本文選題：賀蘭山巖石 + 吸水特性　； 參考：《寧夏大學(xué)》2017年碩士論文

【摘要】：賀蘭山巖石長期裸露在自然環(huán)境中,風(fēng)化問題嚴重,巖畫瀕臨消失。為此,本文在其風(fēng)化現(xiàn)象及水資源調(diào)查的基礎(chǔ)上,以巖畫載體材料-巖石為研究對象,選定巖畫景區(qū)的6個分區(qū)(記為:A、B、C、D、E、F區(qū))為巖樣品采集地。首先進行巖樣吸水試驗,研究巖石質(zhì)量、自然吸水率和飽和吸水率隨浸水時間變化特性,建立巖石吸水率的數(shù)值擬合函數(shù),揭示吸水特性在時間序列上的變化規(guī)律。然后,模擬光照、溫度和風(fēng)蝕自然風(fēng)化因素,進行氙燈試驗、凍融試驗和風(fēng)洞試驗等室內(nèi)老化試驗,分別以240h、480h和50h為一老化周期,進行三個周期的模擬試驗,探討這些因素對巖石質(zhì)量和吸水率的影響。最后,選取尺寸為1cm×1cm×O.1cm的巖樣薄片,從微觀視角,采用SEM給出了同一巖樣4種不同放大倍數(shù)、同一巖畫分布區(qū)的風(fēng)化面和新鮮面巖樣和6個不同巖畫分布區(qū)巖樣的孔隙特征和膠結(jié)結(jié)構(gòu)等微觀特性。研究結(jié)果表明:巖樣質(zhì)量、自然吸水率和飽和吸水率隨浸水時間的延長而增大,二者之間的變化規(guī)律滿足對數(shù)函數(shù),并且?guī)r樣風(fēng)化程度愈大,其吸水率愈大;室內(nèi)老化試驗周期結(jié)束后巖樣質(zhì)量減少而吸水率增大,且風(fēng)化程度愈大,吸水率也愈大,而且A、B區(qū)巖樣受溫度、光照和風(fēng)蝕這些病害因子影響較大,吸水率變化也最明顯,風(fēng)化程度也最嚴重,其次為E、F區(qū)和C、D區(qū)。微觀特征研究發(fā)現(xiàn),巖石的風(fēng)化程度與其吸水特性和微觀特征有必然聯(lián)系,吸水率愈大,孔隙愈多,巖石膠結(jié)愈疏松,巖樣結(jié)構(gòu)愈不完整,巖畫風(fēng)化程度越大。而且同一巖畫區(qū)的新鮮面巖樣整體性較強,局部為片狀或塊狀,膠結(jié)較好,而風(fēng)化面巖樣裂隙發(fā)育明顯,孔洞較大,結(jié)構(gòu)松散。不同巖畫區(qū)巖樣微觀結(jié)構(gòu)越松散,孔隙越大,孔洞越明顯,顆�？臻g排布越不均勻,巖石完整性破壞越嚴重,巖畫風(fēng)化程度就越大。本文的研究確定了吸水率和微觀特征可以表征巖畫風(fēng)化程度,為賀蘭山巖畫保護和修復(fù)工作提供了一定的理論基礎(chǔ)。
[Abstract]:The rock of Helan Mountain is exposed in the natural environment for a long time, the weathering problem is serious, the rock painting is on the verge of disappearing. Therefore, on the basis of its weathering phenomenon and water resources investigation, taking the rock painting carrier material-rock as the research object, this paper selects the six zones of rock painting scenic spot (denoted as the area of the rock painting area) as the collection site of rock samples. Firstly, the water absorption tests of rock samples were carried out to study the variation characteristics of rock mass, natural water absorption and saturated water absorption with immersion time. The numerical fitting function of rock water absorption rate was established to reveal the variation law of water absorption characteristics in time series. Then, simulating the natural weathering factors of light, temperature and wind erosion, the indoor aging tests, such as xenon lamp test, freeze-thaw test and wind tunnel test, were carried out. The effects of these factors on rock quality and water absorption are discussed. Finally, four different magnification times of the same rock sample are given by using SEM from the microscopic point of view by selecting the slice of rock sample with the size of 1cm 脳 1cm 脳 O.1cm. The pore characteristics and cementation structure of weathered and fresh rock samples in the same rock painting distribution area and 6 rock samples in different rock painting distribution areas are discussed. The results show that the mass of rock sample, natural water absorption rate and saturated water absorption rate increase with the prolongation of soaking time, and the law of variation between them satisfies the logarithmic function, and the higher the weathering degree of rock sample is, the greater its water absorption rate is. At the end of the indoor aging test cycle, the quality of rock samples decreases and the water absorption rate increases, and the higher the weathering degree, the greater the water absorption rate. Moreover, the rock samples in AHB area are greatly affected by temperature, illumination and wind erosion, and the variation of water absorption rate is the most obvious. The degree of weathering was also the most serious, followed by EG F and C D region. It is found that the weathering degree of rock is related to its water absorption and microscopic characteristics. The larger the water absorption rate, the more pores, the looser the cementation of rock, the more incomplete the sample structure, and the greater the weathering degree of rock painting. In the same rock painting area, the integrity of the fresh surface rock samples is strong, the parts are flake or block, and the cementation is good, while the cracks of weathered surface rock samples are obviously developed, the pores are large and the structure is loose. The looser the microstructure of rock samples in different rock painting areas, the larger the pores, the more obvious the holes, the more uneven the distribution of grain space, the more serious the damage to the integrity of rock and the greater the weathering degree of rock paintings. The study of this paper determines that the water absorption rate and microscopic characteristics can characterize the weathering degree of rock paintings and provide a theoretical basis for the protection and restoration of rock paintings in Helan Mountain.
【學(xué)位授予單位】：寧夏大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：K879.4;P512.1

【參考文獻】

相關(guān)期刊論文 前10條

1 李軍;;石質(zhì)文物保護技術(shù)研究——以賀蘭山巖畫為例[J];民族藝林;2016年01期

2 張慧;焦淑靜;龐起發(fā);李寧;林伯偉;;中國南方早古生代頁巖有機質(zhì)的掃描電鏡研究[J];石油與天然氣地質(zhì);2015年04期

3 劉琦;顧展飛;盧耀如;劉之葵;;貴州施秉白云巖溶蝕特性及孔隙特征實驗研究[J];地球?qū)W報;2015年04期

4 吳剛;翟松韜;王宇;;高溫下花崗巖的細觀結(jié)構(gòu)與聲發(fā)射特性研究[J];巖土力學(xué);2015年S1期

5 鐘建華;劉圣鑫;馬寅生;尹成明;劉成林;李宗星;劉選;李勇;;頁巖宏觀破裂模式與微觀破裂機理[J];石油勘探與開發(fā);2015年02期

6 嚴紹軍;陳嘉琦;竇彥;孫鵬;;云岡石窟砂巖特性與巖石風(fēng)化試驗[J];現(xiàn)代地質(zhì);2015年02期

7 周科平;李斌;李杰林;鄧紅衛(wèi);賓峰;;凍融作用下巖石的微觀損傷及動態(tài)力學(xué)特性（英文）[J];Transactions of Nonferrous Metals Society of China;2015年04期

8 張中儉;楊曦光;葉富建;周華;張濤;;北京房山大理巖的巖石學(xué)微觀特征及風(fēng)化機理討論[J];工程地質(zhì)學(xué)報;2015年02期

9 戎虎仁;白海波;王占盛;;不同溫度后紅砂巖力學(xué)性質(zhì)及微觀結(jié)構(gòu)變化規(guī)律試驗研究[J];巖土力學(xué);2015年02期

10 張慧梅;張蒙軍;謝祥妙;曹海波;;凍融循環(huán)條件下紅砂巖物理力學(xué)特性試驗研究[J];太原理工大學(xué)學(xué)報;2015年01期

相關(guān)博士學(xué)位論文 前1條

1 宗靜婷;廣元千佛崖摩崖石質(zhì)文物保護的環(huán)境地質(zhì)問題研究[D];西北大學(xué);2011年

相關(guān)碩士學(xué)位論文 前6條

1 付新媛;莫高窟砂礫巖風(fēng)化微觀特征研究[D];蘭州大學(xué);2014年

2 張曉霞;賀蘭口巖畫風(fēng)化機理研究及其保護材料探索[D];寧夏大學(xué);2014年

3 王志麟;賀蘭山的冰川與環(huán)境[D];遼寧師范大學(xué);2011年

4 馮楠;高句麗石質(zhì)文物風(fēng)化機理及保護方法研究[D];吉林大學(xué);2008年

5 吳海濤;承德避暑山莊露天石質(zhì)文物病變機理研究[D];西北大學(xué);2007年

6 張全勝;凍融條件下巖石細觀損傷力學(xué)特性研究初探[D];西安科技大學(xué);2003年

，

本文編號：1799913