Impact Analysis of Wall-Caisson Composite Structure Construction Adjacent to Rail Transit Bridge
[Objective] The construction deformation control adjacent to operational railways is of utmost importance in current rail transit planning and construction. Therefore, it is necessary to study the effect of the diaphragm wall-caisson composite structure （hereinafter referred to as WCCS）parameters on...
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| Format: | Article |
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Urban Mass Transit Magazine Press
2025-05-01
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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.2025.05.015.html |
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| author | CHEN Wei NI Lei ZHOU Yin DENG Chenglong DI Honggui CAO Zhanlin YAO Qiyu |
| author_facet | CHEN Wei NI Lei ZHOU Yin DENG Chenglong DI Honggui CAO Zhanlin YAO Qiyu |
| author_sort | CHEN Wei |
| collection | DOAJ |
| description | [Objective] The construction deformation control adjacent to operational railways is of utmost importance in current rail transit planning and construction. Therefore, it is necessary to study the effect of the diaphragm wall-caisson composite structure （hereinafter referred to as WCCS）parameters on the structural stress deformation characteristics, which are caused by the caisson interior excavation and the change patterns of the surrounding soil displacement. [Method] In the case study of a composite structure construction project adjacent to Shanghai-Suzhou-Nantong Railway Bridge in Nantong City, the finite-element software is used to analyze the internal forces, deformations, and the surrounding ground settlement patterns of the WCCS. [Result & Conclusion] Firstly, the caisson under the protection of a circular diaphragm wall exhibits relatively small horizontal deformation. Increasing the thickness of both the caisson and diaphragm wall will reduce the maximum deformation and stress in the WCCS itself. However, within the 3~5 m width range of sandwiched soil, the widening of sandwiched soil leads to increased stress and deformation in the diaphragm wall, with a sudden spike particularly observed at the 5 m width of sandwiched soil. Secondly, the uplift value of the bottom-sealed concrete and sandwiched soil is less affected by the thickness of the WCCS. However, within the 3~5 m width range of sandwiched soil, the soil uplift value first increases and then decreases, with the turning point occurring at the 4.5 m width of sandwiched soil. Thirdly, increasing the thickness of the caisson and diaphragm wall reduces the boundary of surrounding ground settlement, with particularly significant weakening effect of the caisson thickness. The width of sandwiched soil has a significant impact on ground settlement, which begins to increase markedly when the width exceeds 3.5 m. Lastly, a well-designed WCCS can improve the stability of the caisson and reduce the deformation impact of caisson construction on the surrounding environment. |
| format | Article |
| id | doaj-art-bd5b00ec957f41d9856ada25329e2a8c |
| institution | OA Journals |
| issn | 1007-869X |
| language | zho |
| publishDate | 2025-05-01 |
| publisher | Urban Mass Transit Magazine Press |
| record_format | Article |
| series | Chengshi guidao jiaotong yanjiu |
| spelling | doaj-art-bd5b00ec957f41d9856ada25329e2a8c2025-08-20T02:28:18ZzhoUrban Mass Transit Magazine PressChengshi guidao jiaotong yanjiu1007-869X2025-05-01285879210.16037/j.1007-869x.2025.05.015Impact Analysis of Wall-Caisson Composite Structure Construction Adjacent to Rail Transit BridgeCHEN Wei0NI Lei1ZHOU Yin2DENG Chenglong3DI Honggui4CAO Zhanlin5YAO Qiyu6Nanjing Shanghai Railway Local Railway Development Co., Ltd., 210003, Nanjing, ChinaNanjing Shanghai Railway Local Railway Development Co., Ltd., 210003, Nanjing, ChinaChina Railway 24th Bureau Group Co., Ltd., 200070, Shanghai, ChinaChina Railway 24th Bureau Group Co., Ltd., 200070, Shanghai, ChinaKey Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, 201804, Shanghai, ChinaKey Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, 201804, Shanghai, ChinaMcMaster University, L8S4L7, Ontario, Canada[Objective] The construction deformation control adjacent to operational railways is of utmost importance in current rail transit planning and construction. Therefore, it is necessary to study the effect of the diaphragm wall-caisson composite structure （hereinafter referred to as WCCS）parameters on the structural stress deformation characteristics, which are caused by the caisson interior excavation and the change patterns of the surrounding soil displacement. [Method] In the case study of a composite structure construction project adjacent to Shanghai-Suzhou-Nantong Railway Bridge in Nantong City, the finite-element software is used to analyze the internal forces, deformations, and the surrounding ground settlement patterns of the WCCS. [Result & Conclusion] Firstly, the caisson under the protection of a circular diaphragm wall exhibits relatively small horizontal deformation. Increasing the thickness of both the caisson and diaphragm wall will reduce the maximum deformation and stress in the WCCS itself. However, within the 3~5 m width range of sandwiched soil, the widening of sandwiched soil leads to increased stress and deformation in the diaphragm wall, with a sudden spike particularly observed at the 5 m width of sandwiched soil. Secondly, the uplift value of the bottom-sealed concrete and sandwiched soil is less affected by the thickness of the WCCS. However, within the 3~5 m width range of sandwiched soil, the soil uplift value first increases and then decreases, with the turning point occurring at the 4.5 m width of sandwiched soil. Thirdly, increasing the thickness of the caisson and diaphragm wall reduces the boundary of surrounding ground settlement, with particularly significant weakening effect of the caisson thickness. The width of sandwiched soil has a significant impact on ground settlement, which begins to increase markedly when the width exceeds 3.5 m. Lastly, a well-designed WCCS can improve the stability of the caisson and reduce the deformation impact of caisson construction on the surrounding environment.https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.2025.05.015.htmlrail transitwall-caisson composite structureadjacent constructionimpact analysis |
| spellingShingle | CHEN Wei NI Lei ZHOU Yin DENG Chenglong DI Honggui CAO Zhanlin YAO Qiyu Impact Analysis of Wall-Caisson Composite Structure Construction Adjacent to Rail Transit Bridge Chengshi guidao jiaotong yanjiu rail transit wall-caisson composite structure adjacent construction impact analysis |
| title | Impact Analysis of Wall-Caisson Composite Structure Construction Adjacent to Rail Transit Bridge |
| title_full | Impact Analysis of Wall-Caisson Composite Structure Construction Adjacent to Rail Transit Bridge |
| title_fullStr | Impact Analysis of Wall-Caisson Composite Structure Construction Adjacent to Rail Transit Bridge |
| title_full_unstemmed | Impact Analysis of Wall-Caisson Composite Structure Construction Adjacent to Rail Transit Bridge |
| title_short | Impact Analysis of Wall-Caisson Composite Structure Construction Adjacent to Rail Transit Bridge |
| title_sort | impact analysis of wall caisson composite structure construction adjacent to rail transit bridge |
| topic | rail transit wall-caisson composite structure adjacent construction impact analysis |
| url | https://umt1998.tongji.edu.cn/journal/paper/doi/10.16037/j.1007-869x.2025.05.015.html |
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