Full-scale experiment for segmental linings of deep-buried shield tunnels bearing high inner water pressure: Comparison of mechanical behaviors of continuous- and stagger-jointed structures
Full-scale loading tests were performed on shield segmental linings bearing a high earth pressure and high inner water pressure, focusing on the effects of the inner water load and assembly manner on the mechanical properties of the segmental linings. The test results indicate that the deep-buried s...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-02-01
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| Series: | Underground Space |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2467967422000630 |
| _version_ | 1797723950803845120 |
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| author | Long Zhou Yi Shen Linxing Guan Zhiguo Yan Wei Sun Yaoliang Li |
| author_facet | Long Zhou Yi Shen Linxing Guan Zhiguo Yan Wei Sun Yaoliang Li |
| author_sort | Long Zhou |
| collection | DOAJ |
| description | Full-scale loading tests were performed on shield segmental linings bearing a high earth pressure and high inner water pressure, focusing on the effects of the inner water load and assembly manner on the mechanical properties of the segmental linings. The test results indicate that the deep-buried segmental linings without inner pressure have a high safety reserve. After the action of high inner water pressure, the lining deformation will increase with the reduction of the safety reserve, caused by the significant decrease in the axial force in the linings. Because the bending moment at the segmental joints is transferred to the segment sections in the adjacent ling rings, the convergence deformation, openings of segmental joints, and bolt strains are smaller for the stagger-jointed lining than those for the continuous-jointed lining; however, dislocations appear in the circumferential joints owing to the stagger-jointed assembly. Although it significantly improves the mechanical performance of the segmental lining, stagger-jointed assembly results in compromising the waterproofing safety of circumferential joints. The stagger-jointed assembly manner can be considered to improve the service performance of shield tunnels bearing high inner water pressure on the premise that circumferential joint waterproofing is satisfied. |
| first_indexed | 2024-03-12T10:10:15Z |
| format | Article |
| id | doaj.art-075e2e1d544445489b6bcca2df5522fb |
| institution | Directory Open Access Journal |
| issn | 2467-9674 |
| language | English |
| last_indexed | 2024-03-12T10:10:15Z |
| publishDate | 2023-02-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Underground Space |
| spelling | doaj.art-075e2e1d544445489b6bcca2df5522fb2023-09-02T10:53:36ZengKeAi Communications Co., Ltd.Underground Space2467-96742023-02-018252266Full-scale experiment for segmental linings of deep-buried shield tunnels bearing high inner water pressure: Comparison of mechanical behaviors of continuous- and stagger-jointed structuresLong Zhou0Yi Shen1Linxing Guan2Zhiguo Yan3Wei Sun4Yaoliang Li5College of Civil Engineering, Tongji University, Shanghai 200092, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200092, China; State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, ChinaShanghai Municipal Engineering Design Institute (Group) Co. Ltd., Shanghai 200092, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200092, China; State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China; Corresponding author at: College of Civil Engineering, Tongji University, Shanghai 200092, China.Shanghai Municipal Engineering Design Institute (Group) Co. Ltd., Shanghai 200092, ChinaShanghai Foundation Engineering Group Co. Ltd., Shanghai 200002, ChinaFull-scale loading tests were performed on shield segmental linings bearing a high earth pressure and high inner water pressure, focusing on the effects of the inner water load and assembly manner on the mechanical properties of the segmental linings. The test results indicate that the deep-buried segmental linings without inner pressure have a high safety reserve. After the action of high inner water pressure, the lining deformation will increase with the reduction of the safety reserve, caused by the significant decrease in the axial force in the linings. Because the bending moment at the segmental joints is transferred to the segment sections in the adjacent ling rings, the convergence deformation, openings of segmental joints, and bolt strains are smaller for the stagger-jointed lining than those for the continuous-jointed lining; however, dislocations appear in the circumferential joints owing to the stagger-jointed assembly. Although it significantly improves the mechanical performance of the segmental lining, stagger-jointed assembly results in compromising the waterproofing safety of circumferential joints. The stagger-jointed assembly manner can be considered to improve the service performance of shield tunnels bearing high inner water pressure on the premise that circumferential joint waterproofing is satisfied.http://www.sciencedirect.com/science/article/pii/S2467967422000630Shield tunnelInner water pressureContinuous-jointed liningStagger-jointed liningFull-scale experiment |
| spellingShingle | Long Zhou Yi Shen Linxing Guan Zhiguo Yan Wei Sun Yaoliang Li Full-scale experiment for segmental linings of deep-buried shield tunnels bearing high inner water pressure: Comparison of mechanical behaviors of continuous- and stagger-jointed structures Underground Space Shield tunnel Inner water pressure Continuous-jointed lining Stagger-jointed lining Full-scale experiment |
| title | Full-scale experiment for segmental linings of deep-buried shield tunnels bearing high inner water pressure: Comparison of mechanical behaviors of continuous- and stagger-jointed structures |
| title_full | Full-scale experiment for segmental linings of deep-buried shield tunnels bearing high inner water pressure: Comparison of mechanical behaviors of continuous- and stagger-jointed structures |
| title_fullStr | Full-scale experiment for segmental linings of deep-buried shield tunnels bearing high inner water pressure: Comparison of mechanical behaviors of continuous- and stagger-jointed structures |
| title_full_unstemmed | Full-scale experiment for segmental linings of deep-buried shield tunnels bearing high inner water pressure: Comparison of mechanical behaviors of continuous- and stagger-jointed structures |
| title_short | Full-scale experiment for segmental linings of deep-buried shield tunnels bearing high inner water pressure: Comparison of mechanical behaviors of continuous- and stagger-jointed structures |
| title_sort | full scale experiment for segmental linings of deep buried shield tunnels bearing high inner water pressure comparison of mechanical behaviors of continuous and stagger jointed structures |
| topic | Shield tunnel Inner water pressure Continuous-jointed lining Stagger-jointed lining Full-scale experiment |
| url | http://www.sciencedirect.com/science/article/pii/S2467967422000630 |
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