干旱区生态环境知识资源中心(Arid): 干旱区土建筑遗址冻融耐久性研究

Arid

	干旱区土建筑遗址冻融耐久性研究
其他题名	Durability of earthen architecture ruins under cyclic freezing and thawing
	严耿升; 张虎元; 王晓东; 杨博; 李敏
来源期刊	岩土力学
ISSN	1000-7598
出版年	2011
卷号	32 期号:8 页码:2267-2273
中文摘要	在我国的西北地区,强烈冻融、风蚀等对性质脆弱的土建筑遗址安全构成极大威胁。研究了冻融循环对土遗址耐久性的影响。选择新疆交河故城原状生土试样和重塑土试样进行了冻融循环试验,监测冻融过程中的质量变化,并在冻融循环结束后进行了风洞试验和强度试验。冻融试验结果表明,在试样初始含水率较低的情况下,前5个冻融循环,试样经历了一个质量增大的过程；在随后的冻融过程中伴随着冻干和吸湿,原状试样质量的整体趋势是减小的,重塑样质量的变化趋势维持水平。随冻融循环次数增大,原状试样的微结构出现损伤,强度减小,风蚀量增大,即耐久性持续变差。相反,冻融循环初期,重塑样的强度有所增大,风蚀量减小,耐久性得到了提高；随着冻融循环的增加,重塑样的强度开始下降。重塑试样由于重塑过程中其结构受到破坏,强度弱化,冻融循环引起重塑土的陈化,愈合了土体的结构,但随着冻融进行,矿物颗粒的微结构损伤不断增大,试样的耐久性降低。
英文摘要	Earthen architecture ruins is mostly found in the arid area,which suffers from strong wind erosion,freeze-thaw process.Influence of cyclic freezing-thawing on the durability of earthen architecture are researched.Cyclic freezing-thawing are conducted on the undisturbed and remolded specimens from Jiaohe cultural heritage,Xinjiang,China to understand the durability of earthen architecture to wind erosion and the strength attenuation.Test results show,under low original water content,the undisturbed and remolded specimens masses are increased during the beginning five freezing-thawing cycles.With the change of moisture content during the freezing and thawing process,undisturbed specimen weight expresses a decreasing tendency;and remolded specimens weight maintains a level of weight.With the increasing of freezing-thawing cycles,undisturbed specimens show a decrease in compressive strength and an increase in wind erosion quantity due to microstructure damage;that is,a weakening in durability.However,the remolded specimens exhibit an enhancement of microstructures at beginning cycles,characterized by an increase in strength and a decrease in wind erosion,that is,an improvement in durability.It is considered the healing effect of destroyed microstructure and the aging of chemical cohesive agents are responsible for the strengthening of remolded specimen at the earlier freezing-thawing cycles.At the further freezing-thawing cycles,the remolded specimens turn to exhibit a decreasing tendency on durability following the increasing damage of microstructure.
中文关键词	土建筑遗址 ; 冻融循环 ; 风蚀 ; 耐久性
英文关键词	earthen architecture ruins cyclic freezing and thawing wind erosion durability
语种	中文
国家	中国
收录类别	CSCD
WOS类目	CONSTRUCTION BUILDING TECHNOLOGY
WOS研究方向	Construction & Building Technology
CSCD记录号	CSCD:4278041
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/2XILL650/227306
作者单位	兰州大学, 西部灾害与环境力学教育部重点试验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	严耿升,张虎元,王晓东,等. 干旱区土建筑遗址冻融耐久性研究[J]. 兰州大学,2011,32(8):2267-2273.
APA	严耿升,张虎元,王晓东,杨博,&李敏.(2011).干旱区土建筑遗址冻融耐久性研究.岩土力学,32(8),2267-2273.
MLA	严耿升,et al."干旱区土建筑遗址冻融耐久性研究".岩土力学 32.8(2011):2267-2273.