| 干旱区土建筑遗址冻融耐久性研究 |
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| 引用本文： | 严耿升,张虎元,王晓东,杨博,李敏.干旱区土建筑遗址冻融耐久性研究[J].岩土力学,2011,32(8):2267-2273. |
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| 作者姓名： | 严耿升 张虎元 王晓东 杨博 李敏 |
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| 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,730000 |
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| 基金项目： | 国家科技支撑计划课题资助项目(No.2006BAK30B02) |
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| 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。
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| 关 键 词： | 土建筑遗址 冻融循环 风蚀 耐久性 |
| 收稿时间： | 2010-06-29 |
Durability of earthen architecture ruins under cyclic freezing and thawing |
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| YAN Geng-sheng,ZHANG Hu-yuan,WANG Xiao-dong,YANG Bo,LI Min.Durability of earthen architecture ruins under cyclic freezing and thawing[J].Rock and Soil Mechanics,2011,32(8):2267-2273. |
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| Authors: | YAN Geng-sheng ZHANG Hu-yuan WANG Xiao-dong YANG Bo LI Min |
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| Institution: | Key Laboratory of Mechanics on Western Disaster and Environmental in Western China of Ministry of Education, Lanzhou University, Lanzhou 730000, China |
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| Abstract: | 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 remol... |
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| Keywords: | earthen architecture ruins cyclic freezing and thawing wind erosion durability |
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