[1]陈云娟,*,敬艺,等.类岩石裂隙扩展多因素影响研究[J].山东建筑大学学报,2019,34(04):32-37.[doi:10.12077/sdjz.2019.04.006]
 CHEN Yunjuan,*,JING Yi,et al.Experimental study on the influence of many factors on crack propagation of rock-like specimen[J].Journal of Shandong jianzhu university,2019,34(04):32-37.[doi:10.12077/sdjz.2019.04.006]
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类岩石裂隙扩展多因素影响研究()
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《山东建筑大学学报》[ISSN:1673-7644/CN:37-1449/TU]

卷:
34
期数:
2019年04期
页码:
32-37
栏目:
研究论文
出版日期:
2019-07-30

文章信息/Info

Title:
Experimental study on the influence of many factors on crack propagation of rock-like specimen
文章编号:
1673-7644(2019)04-0032-06
作者:
陈云娟1*敬艺1尹福强2李艳龙1高涛1
(1. 山东建筑大学 土木工程学院,山东 济南 250101;2. 山东省国土测绘院,山东 济南 250102)
Author(s):
CHEN Yunjuan1* JING Yi1 YIN Fuqiang2et al.
(1. School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China; 2. Shandong Provincial Institute of Land Surveying and Mapping, Jinan 250102, China)
关键词:
类岩石试件节理位置围压温度裂隙扩展
Keywords:
rock-like specimen joint position confining pressure temperature crack propagation
分类号:
TU458
DOI:
10.12077/sdjz.2019.04.006
文献标志码:
A
摘要:
岩体强度是影响岩体工程安全的重要因素,其会因多种因素的改变而变化,研究不同因素对裂隙扩展的影响,可以获得不同因素对岩体强度影响规律,为保证岩体工程的安全和稳定提供参考依据。文章主要考虑节理位置、围压和温度对岩体破裂过程的影响,通过室内试验分析节理位置对岩体裂隙扩展规律的影响,研究围压的改变对岩体峰值强度和破裂形态的作用,通过加卸载试验定性分析了洞室开挖掌子面的卸荷效应,并对4种较低温度和3种超高温度下岩体的裂隙扩展形态和规律进行了研究。结果表明:节理位于试件端部时,以翼裂纹扩展为主、次生裂隙扩展为辅,主要产生张拉裂纹,而节理位于试件中间时,主要产生剪切裂纹;围压的增加会提高岩体的强度,抑制裂纹的扩展,岩体卸载容易产生劈裂破坏;温度能够降低岩体的强度,超高温条件下,岩体易产生炸裂。
Abstract:
The strength of rock mass is an important factor affecting the safety of rock mass engineering, and the strength of rock mass will change with the change of many factors. By studying the influence of different factors on crack propagation, the law of influence of different factors on rock mass strength is obtained, which can provide reference for ensuring the safety and stability of rock mass engineering. The influence of joint location, confining pressure and temperature on rock masses cracking process are considered in this paper. Through laboratory tests, the influence of joint location on crack propagation of rock mass is analyzed; the effect of confining pressure on the peak strength and fracture morphology of rock mass is studied; the unloading effect on the palm face of excavation is analyzed by loading and unloading test, finally, the crack propagation patterns and laws of rock mass under four kinds of lower temperatures and three kinds of higher temperatures are studied. The results show that, when the joint is located at the end of the specimen, the wing crack propagation is dominant, the secondary crack propagation is supplementary, and most are the tensile cracks; when the joint is located in the middle of the specimen, most are the shear cracks. The confining pressure increases, the strength of rock mass will increase while the crack propagation will be restrained. Temperature can reduce the strength of rock mass, and it is easily to burst under ultra-high temperature.

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相似文献/References:

[1]陈云娟,*,刘洪钊,等.交叉节理类岩石裂隙扩展规律研究[J].山东建筑大学学报,2019,34(02):22.[doi:10.12077/sdjz.2019.02.004]
 CHEN Yunjuan,*,LIU Hongzhao,et al.Study on crack propagation of cross jointed rocklike specimen[J].Journal of Shandong jianzhu university,2019,34(04):22.[doi:10.12077/sdjz.2019.02.004]

备注/Memo

备注/Memo:
收稿日期:2019-07-01基金项目:国家自然科学基金青年项目(51609130);山东省自然科学基金青年项目(ZR2016EEQ10);山东建筑大学博士基金项目(XNBS1704)作者简介:陈云娟(1984-),女,讲师,博士,主要从事岩土工程、地下工程稳定性等方面的研究. E-mail:skdcyj@126.com[*通讯作者]
更新日期/Last Update: 2019-07-31