A model test study of the instability of loess fill slope under different compactness
Loess fill slope is prone to landslide under the condition of rainfall infiltration. The influence of compaction degree under rainfall infiltration on the deformation and failure mechanism and the instability mode and sliding mechanism of loess fill slope is explored. Based on the indoor rainfall sy...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
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Editorial Office of Hydrogeology & Engineering Geology
2022-03-01
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| Series: | Shuiwen dizhi gongcheng dizhi |
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| Online Access: | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202104068 |
| _version_ | 1811170302483234816 |
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| author | Linwan CHEN Xiangjun PEI Xiaochao ZHANG Shuo ZHANG Yujian ZHONG Xin LUO |
| author_facet | Linwan CHEN Xiangjun PEI Xiaochao ZHANG Shuo ZHANG Yujian ZHONG Xin LUO |
| author_sort | Linwan CHEN |
| collection | DOAJ |
| description | Loess fill slope is prone to landslide under the condition of rainfall infiltration. The influence of compaction degree under rainfall infiltration on the deformation and failure mechanism and the instability mode and sliding mechanism of loess fill slope is explored. Based on the indoor rainfall system, combined with the sensor monitoring and 3D laser scanning technology, the rainfall model tests with slope compaction of 80% (low pressure compaction), 90% (medium compaction) and 95% (high pressure compaction) are carried out. The influence of compaction degree on the volume moisture content, matrix suction and deformation failure process of fill slope is analyzed. The results show that the first failure position of the slope is different with different compactness. The first failure of the slope under the medium and high compactness occurs at the foot of the slope, showing the collapse failure. However, the low degree of compaction is at the top of the slope, which is collapsible. The greater the compactness of the slope, the longer the duration of the deformation and failure process, and the more accumulated rainfall required, but the smaller the sliding distance and sliding surface depth. With the increase of compactness, the failure mode of the slope changes from deep overall failure to shallow multi-stage failure. The low-pressure compaction slope is of the collapsible settlement deep creep tensile failure, the medium compaction slope is of the deep creep tensile failure, and the high-pressure compaction slope is of the shallow multi-stage backward failure. |
| first_indexed | 2024-04-10T16:55:47Z |
| format | Article |
| id | doaj.art-e238946917764f30857d9c50edfd60b8 |
| institution | Directory Open Access Journal |
| issn | 1000-3665 |
| language | zho |
| last_indexed | 2024-04-10T16:55:47Z |
| publishDate | 2022-03-01 |
| publisher | Editorial Office of Hydrogeology & Engineering Geology |
| record_format | Article |
| series | Shuiwen dizhi gongcheng dizhi |
| spelling | doaj.art-e238946917764f30857d9c50edfd60b82023-02-07T08:18:09ZzhoEditorial Office of Hydrogeology & Engineering GeologyShuiwen dizhi gongcheng dizhi1000-36652022-03-0149213714710.16030/j.cnki.issn.1000-3665.202104068202104068A model test study of the instability of loess fill slope under different compactnessLinwan CHEN0Xiangjun PEI1Xiaochao ZHANG2Shuo ZHANG3Yujian ZHONG4Xin LUO5State Key Laboratory of Geohazard Prevention and Geoenvironmental Protection, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironmental Protection, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironmental Protection, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaCollege of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450045, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironmental Protection, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironmental Protection, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaLoess fill slope is prone to landslide under the condition of rainfall infiltration. The influence of compaction degree under rainfall infiltration on the deformation and failure mechanism and the instability mode and sliding mechanism of loess fill slope is explored. Based on the indoor rainfall system, combined with the sensor monitoring and 3D laser scanning technology, the rainfall model tests with slope compaction of 80% (low pressure compaction), 90% (medium compaction) and 95% (high pressure compaction) are carried out. The influence of compaction degree on the volume moisture content, matrix suction and deformation failure process of fill slope is analyzed. The results show that the first failure position of the slope is different with different compactness. The first failure of the slope under the medium and high compactness occurs at the foot of the slope, showing the collapse failure. However, the low degree of compaction is at the top of the slope, which is collapsible. The greater the compactness of the slope, the longer the duration of the deformation and failure process, and the more accumulated rainfall required, but the smaller the sliding distance and sliding surface depth. With the increase of compactness, the failure mode of the slope changes from deep overall failure to shallow multi-stage failure. The low-pressure compaction slope is of the collapsible settlement deep creep tensile failure, the medium compaction slope is of the deep creep tensile failure, and the high-pressure compaction slope is of the shallow multi-stage backward failure.https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202104068loess fill slopecompactnessfailure moderainfall infiltrationmodel test |
| spellingShingle | Linwan CHEN Xiangjun PEI Xiaochao ZHANG Shuo ZHANG Yujian ZHONG Xin LUO A model test study of the instability of loess fill slope under different compactness Shuiwen dizhi gongcheng dizhi loess fill slope compactness failure mode rainfall infiltration model test |
| title | A model test study of the instability of loess fill slope under different compactness |
| title_full | A model test study of the instability of loess fill slope under different compactness |
| title_fullStr | A model test study of the instability of loess fill slope under different compactness |
| title_full_unstemmed | A model test study of the instability of loess fill slope under different compactness |
| title_short | A model test study of the instability of loess fill slope under different compactness |
| title_sort | model test study of the instability of loess fill slope under different compactness |
| topic | loess fill slope compactness failure mode rainfall infiltration model test |
| url | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202104068 |
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