Experimental Investigation on the Influence of Regional Concrete Spalling on Shield Tunnel Segments
Based on the field investigation and analysis, the mechanical characteristics of segment structure in shield tunnels are compared and analyzed under the circumstances of different concrete spalling region by the method of similarity model experiment. Through data analysis of acoustic emission, the r...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/1829124 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850215646718066688 |
|---|---|
| author | Shimin Wang Chuankun Liu Gaoyu Ma Songyu Cao Junbo Zhang Daiyue Lu Chuan He |
| author_facet | Shimin Wang Chuankun Liu Gaoyu Ma Songyu Cao Junbo Zhang Daiyue Lu Chuan He |
| author_sort | Shimin Wang |
| collection | DOAJ |
| description | Based on the field investigation and analysis, the mechanical characteristics of segment structure in shield tunnels are compared and analyzed under the circumstances of different concrete spalling region by the method of similarity model experiment. Through data analysis of acoustic emission, the results for displacement and internal force of shield tunnel segments are clarified on the segment lining, the influential rule of load bearing capacity is also determined, and the deformation and stress for the different concrete spalling region are described as well. The corresponding research results indicate that range for elastic bearing stage is enlarged while it is narrowed for plastic bearing stage, the convergence and deformation and the accumulated event numbers for acoustic emission on critical instability point are obviously increasing, and the process of damage and failure tends to be sudden for segment lining structure. The ultimate bearing capacity of the damaged segment lining obviously decreases due to regional concrete spalling; to be more specific, the reduction rate for ultimate bearing capacity becomes 6%, 6%, and 13%, respectively, when the range of concrete spalling reaches 45°, 60°, and 75°. |
| format | Article |
| id | doaj-art-86dfd2aab581416f8aecb25e31c5349d |
| institution | OA Journals |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-86dfd2aab581416f8aecb25e31c5349d2025-08-20T02:08:32ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/18291241829124Experimental Investigation on the Influence of Regional Concrete Spalling on Shield Tunnel SegmentsShimin Wang0Chuankun Liu1Gaoyu Ma2Songyu Cao3Junbo Zhang4Daiyue Lu5Chuan He6Key Laboratory of Transportation Tunnel Engineering Ministry of Education, Southwest Jiaotong University, Chengdu 610031, ChinaKey Laboratory of Transportation Tunnel Engineering Ministry of Education, Southwest Jiaotong University, Chengdu 610031, ChinaKey Laboratory of Transportation Tunnel Engineering Ministry of Education, Southwest Jiaotong University, Chengdu 610031, ChinaKey Laboratory of Transportation Tunnel Engineering Ministry of Education, Southwest Jiaotong University, Chengdu 610031, ChinaKey Laboratory of Transportation Tunnel Engineering Ministry of Education, Southwest Jiaotong University, Chengdu 610031, ChinaKey Laboratory of Transportation Tunnel Engineering Ministry of Education, Southwest Jiaotong University, Chengdu 610031, ChinaKey Laboratory of Transportation Tunnel Engineering Ministry of Education, Southwest Jiaotong University, Chengdu 610031, ChinaBased on the field investigation and analysis, the mechanical characteristics of segment structure in shield tunnels are compared and analyzed under the circumstances of different concrete spalling region by the method of similarity model experiment. Through data analysis of acoustic emission, the results for displacement and internal force of shield tunnel segments are clarified on the segment lining, the influential rule of load bearing capacity is also determined, and the deformation and stress for the different concrete spalling region are described as well. The corresponding research results indicate that range for elastic bearing stage is enlarged while it is narrowed for plastic bearing stage, the convergence and deformation and the accumulated event numbers for acoustic emission on critical instability point are obviously increasing, and the process of damage and failure tends to be sudden for segment lining structure. The ultimate bearing capacity of the damaged segment lining obviously decreases due to regional concrete spalling; to be more specific, the reduction rate for ultimate bearing capacity becomes 6%, 6%, and 13%, respectively, when the range of concrete spalling reaches 45°, 60°, and 75°.http://dx.doi.org/10.1155/2019/1829124 |
| spellingShingle | Shimin Wang Chuankun Liu Gaoyu Ma Songyu Cao Junbo Zhang Daiyue Lu Chuan He Experimental Investigation on the Influence of Regional Concrete Spalling on Shield Tunnel Segments Advances in Civil Engineering |
| title | Experimental Investigation on the Influence of Regional Concrete Spalling on Shield Tunnel Segments |
| title_full | Experimental Investigation on the Influence of Regional Concrete Spalling on Shield Tunnel Segments |
| title_fullStr | Experimental Investigation on the Influence of Regional Concrete Spalling on Shield Tunnel Segments |
| title_full_unstemmed | Experimental Investigation on the Influence of Regional Concrete Spalling on Shield Tunnel Segments |
| title_short | Experimental Investigation on the Influence of Regional Concrete Spalling on Shield Tunnel Segments |
| title_sort | experimental investigation on the influence of regional concrete spalling on shield tunnel segments |
| url | http://dx.doi.org/10.1155/2019/1829124 |
| work_keys_str_mv | AT shiminwang experimentalinvestigationontheinfluenceofregionalconcretespallingonshieldtunnelsegments AT chuankunliu experimentalinvestigationontheinfluenceofregionalconcretespallingonshieldtunnelsegments AT gaoyuma experimentalinvestigationontheinfluenceofregionalconcretespallingonshieldtunnelsegments AT songyucao experimentalinvestigationontheinfluenceofregionalconcretespallingonshieldtunnelsegments AT junbozhang experimentalinvestigationontheinfluenceofregionalconcretespallingonshieldtunnelsegments AT daiyuelu experimentalinvestigationontheinfluenceofregionalconcretespallingonshieldtunnelsegments AT chuanhe experimentalinvestigationontheinfluenceofregionalconcretespallingonshieldtunnelsegments |