Combined effects of the porosity and degree of saturation on the mechanical properties and deformation behaviour of rocks

IF 1.3 4区工程技术 Q3 ENGINEERING, GEOLOGICAL

Quarterly Journal of Engineering Geology and Hydrogeology Pub Date : 2023-02-01 DOI:10.1144/qjegh2020-074

Yue Pan, Guang Wu, Liu He, Zhiming Zhao

{"title":"Combined effects of the porosity and degree of saturation on the mechanical properties and deformation behaviour of rocks","authors":"Yue Pan, Guang Wu, Liu He, Zhiming Zhao","doi":"10.1144/qjegh2020-074","DOIUrl":null,"url":null,"abstract":"To reveal the roles of pores and fissures in the rock-weakening effect of water, this study used porosity to quantitatively characterize pores and fissures in rocks. Based on the results from mechanical tests on rock specimens with different porosities and degrees of saturation, the combined effects of the porosity and water content on the mechanical properties and deformation behaviour of rocks were investigated. The test results indicated that the rock-weakening effect of water was markedly more significant if the pores and fissures in the rock were highly developed. The test data showed that the ratio of the saturated specimen strength to the dry specimen strength of porous rock can be even lower than 0.1. The least-squares regression method was used to derive the impact of rock porosity on rock-weakening due to the effect of water. Based on the results, a practical engineering method for modifying the mechanical parameters of wet rocks with highly developed pores and fissures was proposed. This method can be used to more accurately calculate the stress-strain state of rocks.","PeriodicalId":20937,"journal":{"name":"Quarterly Journal of Engineering Geology and Hydrogeology","volume":" ","pages":""},"PeriodicalIF":1.3000,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Quarterly Journal of Engineering Geology and Hydrogeology","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1144/qjegh2020-074","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}

引用次数: 0

Abstract

To reveal the roles of pores and fissures in the rock-weakening effect of water, this study used porosity to quantitatively characterize pores and fissures in rocks. Based on the results from mechanical tests on rock specimens with different porosities and degrees of saturation, the combined effects of the porosity and water content on the mechanical properties and deformation behaviour of rocks were investigated. The test results indicated that the rock-weakening effect of water was markedly more significant if the pores and fissures in the rock were highly developed. The test data showed that the ratio of the saturated specimen strength to the dry specimen strength of porous rock can be even lower than 0.1. The least-squares regression method was used to derive the impact of rock porosity on rock-weakening due to the effect of water. Based on the results, a practical engineering method for modifying the mechanical parameters of wet rocks with highly developed pores and fissures was proposed. This method can be used to more accurately calculate the stress-strain state of rocks.

查看原文本刊更多论文

孔隙度和饱和度对岩石力学性能和变形行为的综合影响

为了揭示孔隙和裂隙在水的岩石弱化作用中的作用，本研究利用孔隙度对岩石中的孔隙和裂隙进行了定量表征。根据不同孔隙率和饱和度岩石试样的力学试验结果，研究了孔隙率和含水量对岩石力学性能和变形行为的综合影响。试验结果表明，如果岩石中孔隙和裂隙高度发育，水对岩石的削弱作用明显更为显著。试验数据表明，多孔岩石的饱和试样强度与干试样强度之比甚至可以低于0.1。采用最小二乘回归方法推导了岩石孔隙度对水作用下岩石弱化的影响。在此基础上，提出了一种修改孔隙和裂隙高度发育的湿岩力学参数的实用工程方法。该方法可用于更准确地计算岩石的应力-应变状态。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Quarterly Journal of Engineering Geology and Hydrogeology 地学-地球科学综合

CiteScore

3.40

自引率

14.30%

发文量

审稿时长

6 months

期刊介绍： Quarterly Journal of Engineering Geology and Hydrogeology is owned by the Geological Society of London and published by the Geological Society Publishing House. Quarterly Journal of Engineering Geology & Hydrogeology (QJEGH) is an established peer reviewed international journal featuring papers on geology as applied to civil engineering mining practice and water resources. Papers are invited from, and about, all areas of the world on engineering geology and hydrogeology topics. This includes but is not limited to: applied geophysics, engineering geomorphology, environmental geology, hydrogeology, groundwater quality, ground source heat, contaminated land, waste management, land use planning, geotechnics, rock mechanics, geomaterials and geological hazards. The journal publishes the prestigious Glossop and Ineson lectures, research papers, case studies, review articles, technical notes, photographic features, thematic sets, discussion papers, editorial opinion and book reviews.