干旱区生态环境知识资源中心(Arid): 干旱区夯土长城遗址表层病害微观研究

Arid

	干旱区夯土长城遗址表层病害微观研究
其他题名	Microcosmic study on superficial layer diseases in rammed earthen ruins of Great Wall in arid area
	杨龙 1; 张虎元 2; 刘平 2; 王沛涛 1; 谭煜 1
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2017
卷号	31 期号:11 页码:75-80
中文摘要	以武威市明代夯土长城遗址为例,通过现场调查将干旱区夯土长城遗址表面病害划分为风蚀、雨蚀及表层剥离三类。结合室内电镜扫描、X射线衍射及激光粒度分析试验,综合研究遗址表层病害的形成及发育的微观原因。结果表明:遗址表层中的土颗粒呈薄片状,并按叠瓦状紧密排列;母墙土颗粒表面粗糙,形状呈角砾状,颗粒无序紧密排列,夯筑痕迹明显。遗址表层与母墙中的矿物含量相近,粘土矿物含量低。母墙土的砂粒含量高,粉粒含量低;表层土粉粒含量高,砂粒含量低。研究认为:粘粒组粘土矿物的低含量导致遗址土颗粒间的连接力差,这是遗址表面雨蚀和风蚀病害发育的内在原因,表层与母墙的粒度组分与微观结构差异为遗址体的表层剥离提供了物质与结构基础。
英文摘要	This research took the rammed earthen ruins of Great Wall as example,which located in Liangzhou District of Wuwei City in Gansu Province. According to field survey,the superficial diseases of rammed earthen ruins of Great Wall in arid area were divided into wind erosion,rain erosion and superficial layer detachment. laboratory SEM observation,X - ray diffraction and laser particle size analysis were used to research the microscopic causes that lead to superficial diseases. The results show that the particles in superficial layer are shown as lamelliform and imbricate arrangement,but rough elliptical shape,unordered close arrangement and obvious rammed vestige are shown in host soil. The mineral compositions differences between host soil and superficial layer soil are slight and the clay content is low in the two soils. Host soil is marked by higher sand and lower silt and superficial layer soil is marked by higher silt and lower sand. It is concluded that low contents of clay and silt are the fundamental causes that lead to weak point connection,and also the internal causes that lead to wind erosion and rain erosion. Gradation and microstructure differences between host soil and superficial layer soil are basic conditions which result in warp and detachment on superficial layer.
中文关键词	土遗址 ; 长城 ; 干旱区 ; 病害 ; 微观结构
英文关键词	earthen ruins The Great Wall arid area diseases microstructure
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:6102275
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236096
作者单位	1.兰州大学土木工程与力学学院, 兰州, 甘肃 730000, 中国; 2.兰州大学土木工程与力学学院, 西部灾害与环境力学教育部重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	杨龙,张虎元,刘平,等. 干旱区夯土长城遗址表层病害微观研究[J]. 兰州大学,2017,31(11):75-80.
APA	杨龙,张虎元,刘平,王沛涛,&谭煜.(2017).干旱区夯土长城遗址表层病害微观研究.干旱区资源与环境,31(11),75-80.
MLA	杨龙,et al."干旱区夯土长城遗址表层病害微观研究".干旱区资源与环境 31.11(2017):75-80.