Study on the Loess Immersion Test of Metro Line 2 in Xi’an, Shaanxi Province, China
With the implementation of China’s western development and “One Belt, One Road” initiative, there are more and more projects in the collapsibility loess area, and the collapsibility loess problem encountered in the construction is becoming more and more prominent. In this paper, the collapsibility l...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/6654391 |
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| author | Yuanjun Xu Jiading Wang Tianfeng Gu Dengfei Zhang Weiqian Ma |
| author_facet | Yuanjun Xu Jiading Wang Tianfeng Gu Dengfei Zhang Weiqian Ma |
| author_sort | Yuanjun Xu |
| collection | DOAJ |
| description | With the implementation of China’s western development and “One Belt, One Road” initiative, there are more and more projects in the collapsibility loess area, and the collapsibility loess problem encountered in the construction is becoming more and more prominent. In this paper, the collapsibility loess of the south extension section of Xi’an Metro Line 2 is investigated, and its collapsibility characteristics are studied through a large-scale site immersion test. The test site was a 15 m diameter circular test pit, which took 35 days for water injection and 60 days for observation after water stopped. The test results showed that the maximum self-weight collapsibility of the soil layer in the test pit is 32 mm, and the deformation amount is 10.05 mm in Q3 and 9.55 mm in Q2. The maximum deformation amount of 32 mm is less than 70 mm in the shallow marker; it may be caused by the paleosol layer as a bridge to provide a support to the overlying soil layer. The shape of the sphere of influence after immersion resembles a trumpet, slightly protruding outwards from the paleosol. The scope of influence between the infiltrated and saturated zones gradually increases with depth, and the saturated zone is generally smaller than the infiltrated zone. The research results of this paper can provide technical support and reference for the construction of Xi’an Metro Line 2 and other related projects in the region. |
| format | Article |
| id | doaj-art-9a4238001ca64c71aa3f3cdc67ea5cad |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-9a4238001ca64c71aa3f3cdc67ea5cad2025-02-03T05:49:50ZengWileyAdvances in Civil Engineering1687-80861687-80942021-01-01202110.1155/2021/66543916654391Study on the Loess Immersion Test of Metro Line 2 in Xi’an, Shaanxi Province, ChinaYuanjun Xu0Jiading Wang1Tianfeng Gu2Dengfei Zhang3Weiqian Ma4State Key Laboratory of Continental Dynamics/Department of Geology, Northwest University, Xi’an 710069, Shaanxi, ChinaState Key Laboratory of Continental Dynamics/Department of Geology, Northwest University, Xi’an 710069, Shaanxi, ChinaState Key Laboratory of Continental Dynamics/Department of Geology, Northwest University, Xi’an 710069, Shaanxi, ChinaState Key Laboratory of Continental Dynamics/Department of Geology, Northwest University, Xi’an 710069, Shaanxi, ChinaState Key Laboratory of Continental Dynamics/Department of Geology, Northwest University, Xi’an 710069, Shaanxi, ChinaWith the implementation of China’s western development and “One Belt, One Road” initiative, there are more and more projects in the collapsibility loess area, and the collapsibility loess problem encountered in the construction is becoming more and more prominent. In this paper, the collapsibility loess of the south extension section of Xi’an Metro Line 2 is investigated, and its collapsibility characteristics are studied through a large-scale site immersion test. The test site was a 15 m diameter circular test pit, which took 35 days for water injection and 60 days for observation after water stopped. The test results showed that the maximum self-weight collapsibility of the soil layer in the test pit is 32 mm, and the deformation amount is 10.05 mm in Q3 and 9.55 mm in Q2. The maximum deformation amount of 32 mm is less than 70 mm in the shallow marker; it may be caused by the paleosol layer as a bridge to provide a support to the overlying soil layer. The shape of the sphere of influence after immersion resembles a trumpet, slightly protruding outwards from the paleosol. The scope of influence between the infiltrated and saturated zones gradually increases with depth, and the saturated zone is generally smaller than the infiltrated zone. The research results of this paper can provide technical support and reference for the construction of Xi’an Metro Line 2 and other related projects in the region.http://dx.doi.org/10.1155/2021/6654391 |
| spellingShingle | Yuanjun Xu Jiading Wang Tianfeng Gu Dengfei Zhang Weiqian Ma Study on the Loess Immersion Test of Metro Line 2 in Xi’an, Shaanxi Province, China Advances in Civil Engineering |
| title | Study on the Loess Immersion Test of Metro Line 2 in Xi’an, Shaanxi Province, China |
| title_full | Study on the Loess Immersion Test of Metro Line 2 in Xi’an, Shaanxi Province, China |
| title_fullStr | Study on the Loess Immersion Test of Metro Line 2 in Xi’an, Shaanxi Province, China |
| title_full_unstemmed | Study on the Loess Immersion Test of Metro Line 2 in Xi’an, Shaanxi Province, China |
| title_short | Study on the Loess Immersion Test of Metro Line 2 in Xi’an, Shaanxi Province, China |
| title_sort | study on the loess immersion test of metro line 2 in xi an shaanxi province china |
| url | http://dx.doi.org/10.1155/2021/6654391 |
| work_keys_str_mv | AT yuanjunxu studyontheloessimmersiontestofmetroline2inxianshaanxiprovincechina AT jiadingwang studyontheloessimmersiontestofmetroline2inxianshaanxiprovincechina AT tianfenggu studyontheloessimmersiontestofmetroline2inxianshaanxiprovincechina AT dengfeizhang studyontheloessimmersiontestofmetroline2inxianshaanxiprovincechina AT weiqianma studyontheloessimmersiontestofmetroline2inxianshaanxiprovincechina |