[1]奚家米,付 垒,贾晓峰,等.不同冻融状态下白垩系常见岩层物理力学特性对比分析[J].西安科技大学学报,2018,(02):253-259.[doi:10.13800/j.cnki.xakjdxxb.2018.0212]
 XI Jia-mi,FU Lei,JIA Xiao-feng,et al.Experimental study on physical and mechanical properties of Cretaceous rock under freezing-thawing action[J].Journal of Xi'an University of Science and Technology,2018,(02):253-259.[doi:10.13800/j.cnki.xakjdxxb.2018.0212]
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不同冻融状态下白垩系常见岩层物理力学特性对比分析(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2018年02期
页码:
253-259
栏目:
出版日期:
2018-03-15

文章信息/Info

Title:
Experimental study on physical and mechanical properties of Cretaceous rock under freezing-thawing action
文章编号:
1672-9315(2018)02-0253-07
作者:
奚家米12付 垒1贾晓峰3杨更社1申艳军12
1.西安科技大学 建筑与土木工程学院,陕西 西安 710054; 2.中交第一公路勘察设计研究院有限公司 高寒高海拔地区道路工程安全与健康国家重点试验室,陕西 西安 710075; 3.中交公路养护工程技术有限公司,北京 100013
Author(s):
XI Jia-mi12FU Lei1JIA Xiao-feng3YANG Geng-she1SHEN Yan-jun12
(1.College of Civil and Architectural Engineering,Xi'an University of Science and Technology,Xi'an 710054,China; 2.State Key Laboratory for Safety and Health of Road Engineering in High Alpine and High Altitude Areas,CCCC First Highway Concultants Co.,Ltd.,Xi'an 710075,China; 3.CCCC Highway Maintenance Engineering Technology Co.,Ltd.,Beijing 100013,China)
关键词:
岩石力学 冻融作用 饱和吸水率 力学特性 对比分析
Keywords:
rock mechanics freezing-thawing action saturated water content mechanical properties comparison analysis
分类号:
TU 45
DOI:
10.13800/j.cnki.xakjdxxb.2018.0212
文献标志码:
A
摘要:
为研究冻融过程对白垩系常见岩层物理力学特性的影响,选取甘肃新庄煤矿白垩系富水层中揭露的粗粒砂岩、中粒砂岩和泥岩,分别开展了常温、冻结、解冻后饱和吸水率试验,并对岩石在常温状态(20 ℃)、冻结状态(-30 ℃)和解冻后(20 ℃)进行单轴压缩试验,分析了在常温、冻结和解冻条件下岩石的饱和吸水率、抗压强度、弹性模量的变化情况,探讨了岩石由于冻融作用而产生的物理力学性质损伤。试验结果表明:低温冻结对泥岩的单轴抗压强度提升程度最大,解冻后粗粒砂岩强度折减程度最大; 冻结使粗粒砂岩的塑性增强,使泥岩和中粒砂岩的脆性增强,解冻后3种岩石的塑性均增强; 粗粒砂岩在弹性模量方面对冻融作用最为敏感; 在相同冻结温度下,孔隙率是影响冻融损伤程度的关键因素,对应的孔隙率最高的粗粒砂岩冻融损伤程度最为显著。
Abstract:
For study of the physical mechanics characteristics of Cretaceous rock under the artificial freezing method,the coarse sandstone,sandstone and mudstone were chosen as the object of the study.Saturated water absorption rate and the uniaxial compression under the condition of normal temperature(20 ℃),freezing(-30 ℃)and thawing(20 ℃)were tested.Then saturated water absorption rate,uniaxial compression strength and elastic modulus under freezing-thawing action were analyzed.The influence of damage on the mechanical properities of rocks was discussed.Experiment results show that the uniaxial compression strength of mudstone rock increased greatest after low-temperature freezing and the strength of coarse sandstone reduces greastest after thawing.Freezing increases the plastic of coarse sandstone and the elastic of sandstone and mudstone.Thawing increases the plastic of the three kinds of rock.The coarse sandstone is most sensitive to freezing-thawing action in elastic modulus.Saturated water content of rock is the key factor of freezing and thawing damage degree at the same freezing temperature.So the freezing and thawing damage degree of coarse sandstone is the largest.

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备注/Memo

备注/Memo:
收稿日期:2017-11-16 责任编辑:高 佳
基金项目:国家自然科学基金(41772333); 高寒高海拔地区道路工程安全与健康国家重点试验室开放基金(YGY2017KYPT-07)
通信作者:奚家米(1974-),男,安徽芜湖人,博士,教授,E-mail:510410073@qq.com
更新日期/Last Update: 2018-03-31