A study of shear strength characteristics and estimation model of limestone under different weathering degrees
The shear strength characteristics of common limestone in engineering under different weathering degrees were seldom examined, and there is no mathematical model for rapid evaluation of the shear strength of limestone, which cannot meet the needs of prevention and control of a large number of limest...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
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Editorial Office of Hydrogeology & Engineering Geology
2022-07-01
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| Series: | Shuiwen dizhi gongcheng dizhi |
| Subjects: | |
| Online Access: | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202110044 |
| _version_ | 1811170282130374656 |
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| author | Tao DENG Jun LIAO Chenbin WANG Gang TANG Xiaolong QIAN Hongwei GONG |
| author_facet | Tao DENG Jun LIAO Chenbin WANG Gang TANG Xiaolong QIAN Hongwei GONG |
| author_sort | Tao DENG |
| collection | DOAJ |
| description | The shear strength characteristics of common limestone in engineering under different weathering degrees were seldom examined, and there is no mathematical model for rapid evaluation of the shear strength of limestone, which cannot meet the needs of prevention and control of a large number of limestone engineering disasters. In order to explore the influence of weathering degree on the shear strength characteristics of limestone, the fresh limestone samples are selected in the test. The rock samples with different weathering degrees are prepared by indoor weathering simulation test. The indoor rock strength shear test is carried out to explore the variation law of the shear stress-shear displacement curve of limestone and the deterioration law of shear strength and its parameters. The quantitative relationship between the weathering degree and shear strength is revealed by establishing the shear strength estimation model of limestone under weathering degree. The test results show that with the increasing weathering degree, the shear strength and residual shear strength of limestone show a decreasing trend, but the residual shear strength is worse than the shear strength, and the deterioration rate is faster. With the increasing weathering degree, the cohesion c and internal friction angle φ of limestone are getting smaller and smaller, and the deterioration trend is similar. Using the wave velocity ratio to quantify the weathering degree, the shear strength estimation model of limestone under weathering is established. The shear strength characteristics of rock can be quickly evaluated by simply measuring and calculating the wave velocity ratio of rock. The research results can provide a more simple and feasible method for evaluating the shear strength characteristics of limestone engineering. |
| first_indexed | 2024-04-10T16:55:26Z |
| format | Article |
| id | doaj.art-96dbc2c1d6934bd39177d3a115572b11 |
| institution | Directory Open Access Journal |
| issn | 1000-3665 |
| language | zho |
| last_indexed | 2024-04-10T16:55:26Z |
| publishDate | 2022-07-01 |
| publisher | Editorial Office of Hydrogeology & Engineering Geology |
| record_format | Article |
| series | Shuiwen dizhi gongcheng dizhi |
| spelling | doaj.art-96dbc2c1d6934bd39177d3a115572b112023-02-07T08:15:27ZzhoEditorial Office of Hydrogeology & Engineering GeologyShuiwen dizhi gongcheng dizhi1000-36652022-07-01494718010.16030/j.cnki.issn.1000-3665.202110044202110044A study of shear strength characteristics and estimation model of limestone under different weathering degreesTao DENG0Jun LIAO1Chenbin WANG2Gang TANG3Xiaolong QIAN4Hongwei GONG5College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaCollege of Environment and Civil Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaCollege of Environment and Civil Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaCollege of Environment and Civil Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaZigong City Construction Investment Development Group Co. Ltd., Zigong, Sichuan 643000, ChinaCollege of Environment and Civil Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaThe shear strength characteristics of common limestone in engineering under different weathering degrees were seldom examined, and there is no mathematical model for rapid evaluation of the shear strength of limestone, which cannot meet the needs of prevention and control of a large number of limestone engineering disasters. In order to explore the influence of weathering degree on the shear strength characteristics of limestone, the fresh limestone samples are selected in the test. The rock samples with different weathering degrees are prepared by indoor weathering simulation test. The indoor rock strength shear test is carried out to explore the variation law of the shear stress-shear displacement curve of limestone and the deterioration law of shear strength and its parameters. The quantitative relationship between the weathering degree and shear strength is revealed by establishing the shear strength estimation model of limestone under weathering degree. The test results show that with the increasing weathering degree, the shear strength and residual shear strength of limestone show a decreasing trend, but the residual shear strength is worse than the shear strength, and the deterioration rate is faster. With the increasing weathering degree, the cohesion c and internal friction angle φ of limestone are getting smaller and smaller, and the deterioration trend is similar. Using the wave velocity ratio to quantify the weathering degree, the shear strength estimation model of limestone under weathering is established. The shear strength characteristics of rock can be quickly evaluated by simply measuring and calculating the wave velocity ratio of rock. The research results can provide a more simple and feasible method for evaluating the shear strength characteristics of limestone engineering.https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202110044limestoneweathering degreeshear strengthestimation model |
| spellingShingle | Tao DENG Jun LIAO Chenbin WANG Gang TANG Xiaolong QIAN Hongwei GONG A study of shear strength characteristics and estimation model of limestone under different weathering degrees Shuiwen dizhi gongcheng dizhi limestone weathering degree shear strength estimation model |
| title | A study of shear strength characteristics and estimation model of limestone under different weathering degrees |
| title_full | A study of shear strength characteristics and estimation model of limestone under different weathering degrees |
| title_fullStr | A study of shear strength characteristics and estimation model of limestone under different weathering degrees |
| title_full_unstemmed | A study of shear strength characteristics and estimation model of limestone under different weathering degrees |
| title_short | A study of shear strength characteristics and estimation model of limestone under different weathering degrees |
| title_sort | study of shear strength characteristics and estimation model of limestone under different weathering degrees |
| topic | limestone weathering degree shear strength estimation model |
| url | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202110044 |
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