[1]张慎河*,徐学国,王军,等.类岩石蠕变性能试验及长期强度确定方法研究[J].山东建筑大学学报,2020,(01):24-29.[doi:10.12077/sdjz.2020.01.004]
 ZHANG Shenhe*,XU Xueguo,WANG Jun,et al.Study on creep property test of similar rocks and long-term strength determination method[J].Journal of Shandong jianzhu university,2020,(01):24-29.[doi:10.12077/sdjz.2020.01.004]
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类岩石蠕变性能试验及长期强度确定方法研究()
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《山东建筑大学学报》[ISSN:1673-7644/CN:37-1449/TU]

卷:
期数:
2020年01期
页码:
24-29
栏目:
研究论文
出版日期:
2020-02-15

文章信息/Info

Title:
Study on creep property test of similar rocks and long-term strength determination method
文章编号:
1673-7644(2020)01-0024-06
作者:
张慎河*徐学国王军杨景赵春鑫
(山东建筑大学 土木工程学院,山东 济南 250101)
Author(s):
ZHANG Shenhe*XU XueguoWANG JunYANG JingZHAO Chunxin
(School of Civil Engineering, Shandong Jianzhu University, Jinan 250101,China)
关键词:
长期强度 蠕变性能 类岩石 蠕变阶段
Keywords:
long-term strength creep property similar rocks reep stage
分类号:
TU452
DOI:
10.12077/sdjz.2020.01.004
文献标志码:
A
摘要:
改善岩石蠕变性能是提升地下工程稳定性与安全性的有效措施。文章采用TAW-1000D岩石蠕变扰动试验仪,对类岩石试件开展了单轴蠕变试验,分析了其蠕变力学性能,并结合三参数模型,建立了蠕变稳定变形阈值与瞬时损伤变形阈值的关系式,推导出可以预估长期强度的关系式。结果表明:类岩石受力在长期强度值以下时,其蠕变变形对应力不敏感,同时瞬时弹性模量发生硬化,瞬时变形值逐渐减小;受力在长期强度以上时,类岩石的瞬时变形量逐渐随应力而增大,且蠕变性质十分突出,蠕变变形不稳定;径向变形对应力水平的敏感程度明显高于轴向变形。
Abstract:
Improving the creep mechanical properties of rock is an effective measure to enhance the stability and safety of underground engineering. In this paper, the uniaxial creep test of rock-like specimens is carried out by TAW-1000D rock creep disturbance tester, and the creep mechanical properties are analyzed. Combined with the three-parameter model, the relationship between creep stable deformation threshold and instantaneous damage deformation threshold are established, and the relationship that can predict long-term strength is deduced. The results show that when the stress of rock-like is below the long-term strength value, its creep deformation is not sensitive to the stress, while the instantaneous elastic modulus hardens and the instantaneous deformation value gradually decreases. When the stress is above the long-term strength, the instantaneous deformation of rock-like gradually increases with the stress, and the creep property is very prominent and the creep deformation unstable. The sensitivity of radial deformation to stress level is obviously higher than that of axial deformation.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-12-07 基金项目:国家自然科学基金青年科学基金项目(51704176) 作者简介:张慎河(1974-),男,副教授,博士,主要从事地下工程支护理论与岩土工程体等方面的研究.E-mail:317593830@qq.com[HTH][*通讯作者]
更新日期/Last Update: 2020-01-18