Field Tests on the Stress Characteristics of Enriched Water Tunnel Invert
To monitor the changes in the force of the tunnel invert steel bars after the groundwater level changes, field tests were performed to accurately and comprehensively characterize the stress acting on the rebar of a tunnel invert. Changes in stress and temperature were monitored for two layers of reb...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/6684884 |
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| _version_ | 1832567907926671360 |
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| author | Mingqing Du Xiang Li Xuchun Wang Hongwei Teng Peng Zhang Zhen Zhu |
| author_facet | Mingqing Du Xiang Li Xuchun Wang Hongwei Teng Peng Zhang Zhen Zhu |
| author_sort | Mingqing Du |
| collection | DOAJ |
| description | To monitor the changes in the force of the tunnel invert steel bars after the groundwater level changes, field tests were performed to accurately and comprehensively characterize the stress acting on the rebar of a tunnel invert. Changes in stress and temperature were monitored for two layers of rebar (upper and lower) in an actual tunnel invert during its repair. The results showed that the changes in stress followed different paths for the upper and lower layers. After the groundwater is replenished, the maximum tensile stress of the rebar was 17.3 MPa, and the maximum compressive stress was 120 MPa. Major changes in stress were observed 2–6 days after rain. Based on this, the seepage path of groundwater is analyzed. During this period, the compressive stress increased threefold, and the tensile stress increased 9.5-fold. The rebar stress in the tunnel invert followed a Gaussian distribution after stabilizing. Four phases of stress progression are identified and discussed. The results can provide data support and theoretical basis for the treatment of invert floor heave in enriched water tunnel. |
| format | Article |
| id | doaj-art-f5d2404248ba46048ee347c369d29fa6 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-f5d2404248ba46048ee347c369d29fa62025-02-03T01:00:17ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/66848846684884Field Tests on the Stress Characteristics of Enriched Water Tunnel InvertMingqing Du0Xiang Li1Xuchun Wang2Hongwei Teng3Peng Zhang4Zhen Zhu5School of Civil Engineering, Qingdao University of Technology, Qingdao, Shandong 266033, ChinaQingdao Conson Construction and Investment Co., Ltd., Qingdao, Shandong 266000, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao, Shandong 266033, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao, Shandong 266033, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao, Shandong 266033, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao, Shandong 266033, ChinaTo monitor the changes in the force of the tunnel invert steel bars after the groundwater level changes, field tests were performed to accurately and comprehensively characterize the stress acting on the rebar of a tunnel invert. Changes in stress and temperature were monitored for two layers of rebar (upper and lower) in an actual tunnel invert during its repair. The results showed that the changes in stress followed different paths for the upper and lower layers. After the groundwater is replenished, the maximum tensile stress of the rebar was 17.3 MPa, and the maximum compressive stress was 120 MPa. Major changes in stress were observed 2–6 days after rain. Based on this, the seepage path of groundwater is analyzed. During this period, the compressive stress increased threefold, and the tensile stress increased 9.5-fold. The rebar stress in the tunnel invert followed a Gaussian distribution after stabilizing. Four phases of stress progression are identified and discussed. The results can provide data support and theoretical basis for the treatment of invert floor heave in enriched water tunnel.http://dx.doi.org/10.1155/2021/6684884 |
| spellingShingle | Mingqing Du Xiang Li Xuchun Wang Hongwei Teng Peng Zhang Zhen Zhu Field Tests on the Stress Characteristics of Enriched Water Tunnel Invert Geofluids |
| title | Field Tests on the Stress Characteristics of Enriched Water Tunnel Invert |
| title_full | Field Tests on the Stress Characteristics of Enriched Water Tunnel Invert |
| title_fullStr | Field Tests on the Stress Characteristics of Enriched Water Tunnel Invert |
| title_full_unstemmed | Field Tests on the Stress Characteristics of Enriched Water Tunnel Invert |
| title_short | Field Tests on the Stress Characteristics of Enriched Water Tunnel Invert |
| title_sort | field tests on the stress characteristics of enriched water tunnel invert |
| url | http://dx.doi.org/10.1155/2021/6684884 |
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