Prefabricated Corbel Keyway Hollow Column Inspection Pit for Urban Rail Transit Inspection Depot
［Objective］ The existing column inspection pit track bed of the urban rail transit train inspection depot has various disadvantages such as low construction efficiency, large cross-sectional size, and large embedded parts number. In this regard, it is necessary to propose a new type of prefabricated...
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| Format: | Article |
| Language: | zho |
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Urban Mass Transit Magazine Press
2025-04-01
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| Series: | Chengshi guidao jiaotong yanjiu |
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| Online Access: | https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.2025.04.046.html |
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| author | LIU Guan ZHAO Hai ZHAI Beibei ZHANG Guangming |
| author_facet | LIU Guan ZHAO Hai ZHAI Beibei ZHANG Guangming |
| author_sort | LIU Guan |
| collection | DOAJ |
| description | ［Objective］ The existing column inspection pit track bed of the urban rail transit train inspection depot has various disadvantages such as low construction efficiency, large cross-sectional size, and large embedded parts number. In this regard, it is necessary to propose a new type of prefabricated corbel keyway column (hereinafter abbreviated as PCKC) inspection tunnel bed. ［Method］ The structural composition and design of the prefabricated column and cast-in-place track bed of the new PCKC inspection pit is introduced. A static finite element model of the new PCKC inspection pit track bed is established to calculate its stress distribution. The main steps and inspection requirements for manufacturing PCKC are summarized. The bending performance of prefabricated columns is verified through field tests. Compared with ordinary column inspection pit track beds, the advantages of the new PCKC inspection pit track bed are analyzed. ［Result & Conclusion］ Compared with the traditional cast-in-place rectangular cross-section column, the PCKC reduces by 25% in self-weight; the corbel configuration improves the applicability of various fasteners and enhances the lateral stability; the keyway enhances the connection between the column and the track bed. The static model analysis and anti-bending test results show that the structural strength of the prefabricated column meets the design requirements. Compared with the cast-in-place column inspection track bed, the new PCKC inspection track bed has a beautiful appearance, reliable quality, no maintenance, equivalent steel bar consumption, and reduced concrete consumption. Although the single-line cost increases by about 250 000 yuan/km, the construction speed per working face increases by 75 m/d, reducing the number of workers/per working face by about 35%. |
| format | Article |
| id | doaj-art-b68c02d6c91e4e91aef6317f3eb13c05 |
| institution | Kabale University |
| issn | 1007-869X |
| language | zho |
| publishDate | 2025-04-01 |
| publisher | Urban Mass Transit Magazine Press |
| record_format | Article |
| series | Chengshi guidao jiaotong yanjiu |
| spelling | doaj-art-b68c02d6c91e4e91aef6317f3eb13c052025-08-20T03:53:07ZzhoUrban Mass Transit Magazine PressChengshi guidao jiaotong yanjiu1007-869X2025-04-0128425425910.16037/j.1007-869x.2025.04.046Prefabricated Corbel Keyway Hollow Column Inspection Pit for Urban Rail Transit Inspection DepotLIU Guan0ZHAO Hai1ZHAI Beibei2ZHANG Guangming3Beijing Urban Construction Design & Development Group Co., Ltd., 100037, Beijing, ChinaChina Railway Erju Group Co., Ltd., 610031, Chengdu, ChinaBeijing Urban Construction Design & Development Group Co., Ltd., 100037, Beijing, ChinaBeijing Urban Construction Design & Development Group Co., Ltd., 100037, Beijing, China［Objective］ The existing column inspection pit track bed of the urban rail transit train inspection depot has various disadvantages such as low construction efficiency, large cross-sectional size, and large embedded parts number. In this regard, it is necessary to propose a new type of prefabricated corbel keyway column (hereinafter abbreviated as PCKC) inspection tunnel bed. ［Method］ The structural composition and design of the prefabricated column and cast-in-place track bed of the new PCKC inspection pit is introduced. A static finite element model of the new PCKC inspection pit track bed is established to calculate its stress distribution. The main steps and inspection requirements for manufacturing PCKC are summarized. The bending performance of prefabricated columns is verified through field tests. Compared with ordinary column inspection pit track beds, the advantages of the new PCKC inspection pit track bed are analyzed. ［Result & Conclusion］ Compared with the traditional cast-in-place rectangular cross-section column, the PCKC reduces by 25% in self-weight; the corbel configuration improves the applicability of various fasteners and enhances the lateral stability; the keyway enhances the connection between the column and the track bed. The static model analysis and anti-bending test results show that the structural strength of the prefabricated column meets the design requirements. Compared with the cast-in-place column inspection track bed, the new PCKC inspection track bed has a beautiful appearance, reliable quality, no maintenance, equivalent steel bar consumption, and reduced concrete consumption. Although the single-line cost increases by about 250 000 yuan/km, the construction speed per working face increases by 75 m/d, reducing the number of workers/per working face by about 35%.https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.2025.04.046.htmlurban rail transitinspection depotprefabricated columnprefabricated depot |
| spellingShingle | LIU Guan ZHAO Hai ZHAI Beibei ZHANG Guangming Prefabricated Corbel Keyway Hollow Column Inspection Pit for Urban Rail Transit Inspection Depot Chengshi guidao jiaotong yanjiu urban rail transit inspection depot prefabricated column prefabricated depot |
| title | Prefabricated Corbel Keyway Hollow Column Inspection Pit for Urban Rail Transit Inspection Depot |
| title_full | Prefabricated Corbel Keyway Hollow Column Inspection Pit for Urban Rail Transit Inspection Depot |
| title_fullStr | Prefabricated Corbel Keyway Hollow Column Inspection Pit for Urban Rail Transit Inspection Depot |
| title_full_unstemmed | Prefabricated Corbel Keyway Hollow Column Inspection Pit for Urban Rail Transit Inspection Depot |
| title_short | Prefabricated Corbel Keyway Hollow Column Inspection Pit for Urban Rail Transit Inspection Depot |
| title_sort | prefabricated corbel keyway hollow column inspection pit for urban rail transit inspection depot |
| topic | urban rail transit inspection depot prefabricated column prefabricated depot |
| url | https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.2025.04.046.html |
| work_keys_str_mv | AT liuguan prefabricatedcorbelkeywayhollowcolumninspectionpitforurbanrailtransitinspectiondepot AT zhaohai prefabricatedcorbelkeywayhollowcolumninspectionpitforurbanrailtransitinspectiondepot AT zhaibeibei prefabricatedcorbelkeywayhollowcolumninspectionpitforurbanrailtransitinspectiondepot AT zhangguangming prefabricatedcorbelkeywayhollowcolumninspectionpitforurbanrailtransitinspectiondepot |