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投稿时间:2017-09-07 修订日期:2017-09-07
投稿时间:2017-09-07 修订日期:2017-09-07
中文摘要: 为了掌握干湿循环作用对岩石剪切特性的影响规律,以砂岩为研究对象,利用YZW50型微机控制电动应力式直剪仪对其开展干湿循环次数分别为1、5、10、15、20及30次共6种不同状态下的直剪试验。试验结果表明:砂岩抗剪参数具有明显的干湿循环效应,当干湿次数为30次时,粘聚力下降到7.31MPa,内摩擦角减小为34.82°,与干湿循环1次相比,下降幅度分别高达37.31%和20.59%。同时,砂岩的剪切破坏特征也会随着干湿交替次数的增加产生较为显著的变化,即呈现出从脆性到塑性逐渐转化的趋势。研究成果为岩土工程的设计和稳定性评价提供了重要的理论和实际指导意义。
Abstract:In order to grasp the influence of the dry-wet circulation on rock mechanics characteristics, taking the sandstone as an example, a series of shear tests were conducted by YZW50 microcomputer control electric stress direct shear apparatus, 6 kinds of tests of different dry-wet circulation number were set, which respectively were 1, 5, 10, 15, 20 and 30 times. The test results show that the shear characteristics of sandstone have obvious wetting-drying effect, when the dry-wet number is 30 times, the cohesion is 7.31MPa, the internal friction angle is 34.82°, and comparing with 1 times, native state, the falling range of which are severally up to 37.31% and 20.59. In addition, with the increase of dry-wet number, the failure characteristics of sandstone are also changed, and a transformation law from brittleness to ductility is showed.
文章编号:20170907001 中图分类号: 文献标志码:
基金项目:
作者 | 单位 | |
王会琼* | 云南能源职业技术学院 | 297382126@qq.com |
黄维辉 | 核工业江西工程勘察研究总院 |
Author Name | Affiliation | |
WANG Huiqiong | Yunnan vocational institute of energy technology,Qujing | 297382126@qq.com |
HUANG Weihui | Jiangxi Institute of Engineering Prospecting,Nuke Industry,Nanchang |
引用文本:
王会琼,黄维辉.干湿循环对砂岩剪切特性影响试验研究[J].矿冶,2018,27(4):6~9.
王会琼,黄维辉.干湿循环对砂岩剪切特性影响试验研究[J].矿冶,2018,27(4):6~9.