[1]张慧梅,杨更社.岩石冻融循环及抗拉特性试验研究[J].西安科技大学学报,2012,(06):691-695.
 ZHANG Hui-mei,YANG Geng-she.Research on rock freeze-thaw cycle andanti-tensile characteristics test[J].Journal of Xi'an University of Science and Technology,2012,(06):691-695.
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岩石冻融循环及抗拉特性试验研究(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2012年06期
页码:
691-695
栏目:
出版日期:
2012-12-31

文章信息/Info

Title:
Research on rock freeze-thaw cycle andanti-tensile characteristics test
文章编号:
1672-9315(2012)06-0691-05
作者:
张慧梅1杨更社2
1. 西安科技大学 力学系,陕西 西安 710054; 2.西安科技大学 建筑与土木工程学院,陕西 西安 710054
Author(s):
ZHANG Hui-mei1YANG Geng-she2
1.Department of Mechanics,Xi'an University of Science and Technology,Xi'an 710054,China; 2.College of Civil and Architectural Engineering,Xi'an University of Science and Technology,Xi'an 710054,China
关键词:
岩石 冻融循环 损伤劣化 抗拉特性
Keywords:
rock freeze-thaw cycle damage deterioration anti-tensile
分类号:
TU 452
文献标志码:
A
摘要:
通过开放饱水状态下的冻融循环试验研究了红砂岩和页岩2种岩石的冻融损伤劣化及破坏行为,将经历不同冻融次数后的岩样进行抗拉试验,分析了冻融循环作用对岩石损伤及抗拉特性的影响。研究表明:由于岩性及初始损伤状态不同,红砂岩的冻融损伤劣化模式为剥落模式和断裂模式,而页岩为裂纹模式; 岩石抗拉压特性的冻融效应具有相同的规律性,2种岩石的劈裂抗拉强度均随冻融循环次数的增大而减小,但其抗拉特性对冻融循环反映更敏感,损伤劣化更显著; 红砂岩受冻融循环次数影响引起的损伤较页岩大; 寒区岩体工程稳定性评价中必须考虑应力状态对岩石冻融损伤的影响。
Abstract:
The freeze-thaw damage deterioration and breaking behavior were investigated for red sandstone and shale by freeze-thaw cycle test on open and saturated states. The tensile test for the rock on different freeze-thaw cycles was conducted, and the influence of freeze-thaw cycle on rock damage and anti-tensile characteristics were studied.It is shown that the freeze-thaw damage deterioration modes of red sandstone are spalling mode and fracture mode, but it is crack mode for shale due to the difference of lithology and initial damage state between the two types of rock. The regularities of freeze-thaw effects of compression and tensile characteristics for the two types of rock are identical, the plitting tensile strength of rock decreases significantly with the increasing of the number of freeze-thaw cycle,but the tensile characteristic is more sensitive to freeze-thaw cycle,and the rock damage deterioration is more significant. The damage of red sandstone is more serious than that of shale by the number of freeze-thaw cycles. The influence of stress state on freeze-thaw damage for rock must be considered in the stability assessment of rock engineering in cold regions.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2011-05-24
基金项目:国家自然科学基金(11172232,41272340); 陕西省自然科学基金(2011JM1003); 陕西省教育厅专项基金(11JK0525)
通讯作者:张慧梅(1968-),女,山西大同人,博士,教授,主要从事力学与岩土工程方面的教学与研究工作.
更新日期/Last Update: 1900-01-01