Preliminary Study on Double Lining Support Design for Water Plugging of Highway Tunnel under High Water Pressure in Mountain Area Based on Limited Drainage
In the water-rich karst regions, high water and mud outbursts are common geological disasters in tunnel construction. To ensure the safe and smooth construction of tunnel projects, it is necessary to consider anti-water pressure, water inrush prevention and geological disasters during the design of...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/15/7905 |
| _version_ | 1797432984001839104 |
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| author | Yanping Ding Xuefu Zhang Bin Zhang |
| author_facet | Yanping Ding Xuefu Zhang Bin Zhang |
| author_sort | Yanping Ding |
| collection | DOAJ |
| description | In the water-rich karst regions, high water and mud outbursts are common geological disasters in tunnel construction. To ensure the safe and smooth construction of tunnel projects, it is necessary to consider anti-water pressure, water inrush prevention and geological disasters during the design of tunnels. Based on the Yongfutun Tunnel Project, this paper studies the application and effect of radial grouting and curtain grouting, which involves those in high-water-pressure tunnels under double-layer support conditions. To obtain the effects and parameters of radial grouting and curtain grouting, the influences of different grouting ranges on the tunnel’s surrounding rocks and supporting structures were analyzed and the finite difference method was adopted. The results show that the radial grouting of the surrounding rock can notably improve the initial support of the tunnel, but the impact is less obvious when the grouting range exceeds 4 m. The design of radial grouting is recommended to be 4.0 m to 4.5 m. Curtain grouting can effectively reduce the external water pressure of the tunnel lining. The external water pressure of the grouting area is 23% greater than that without curtain grouting. Curtain grouting can slow down the infiltration of external water pressure. This is beneficial to the stress of the tunnel lining structure, but the improvement in initial support force is slight. Moreover, curtain grouting improves the safety reserve of the secondary lining by strengthening the self-stability ability of the surrounding rock. Meanwhile, the double-layer primary support can effectively share the external water pressure and surrounding rock pressure. This study provides a certain reference for the lining design of high-water-pressure tunnels. |
| first_indexed | 2024-03-09T10:09:37Z |
| format | Article |
| id | doaj.art-922e2bcd5fdb4438b76ec8a7e0a4823d |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T10:09:37Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-922e2bcd5fdb4438b76ec8a7e0a4823d2023-12-01T22:51:22ZengMDPI AGApplied Sciences2076-34172022-08-011215790510.3390/app12157905Preliminary Study on Double Lining Support Design for Water Plugging of Highway Tunnel under High Water Pressure in Mountain Area Based on Limited DrainageYanping Ding0Xuefu Zhang1Bin Zhang2State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing 400074, ChinaState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing 400074, ChinaState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing 400074, ChinaIn the water-rich karst regions, high water and mud outbursts are common geological disasters in tunnel construction. To ensure the safe and smooth construction of tunnel projects, it is necessary to consider anti-water pressure, water inrush prevention and geological disasters during the design of tunnels. Based on the Yongfutun Tunnel Project, this paper studies the application and effect of radial grouting and curtain grouting, which involves those in high-water-pressure tunnels under double-layer support conditions. To obtain the effects and parameters of radial grouting and curtain grouting, the influences of different grouting ranges on the tunnel’s surrounding rocks and supporting structures were analyzed and the finite difference method was adopted. The results show that the radial grouting of the surrounding rock can notably improve the initial support of the tunnel, but the impact is less obvious when the grouting range exceeds 4 m. The design of radial grouting is recommended to be 4.0 m to 4.5 m. Curtain grouting can effectively reduce the external water pressure of the tunnel lining. The external water pressure of the grouting area is 23% greater than that without curtain grouting. Curtain grouting can slow down the infiltration of external water pressure. This is beneficial to the stress of the tunnel lining structure, but the improvement in initial support force is slight. Moreover, curtain grouting improves the safety reserve of the secondary lining by strengthening the self-stability ability of the surrounding rock. Meanwhile, the double-layer primary support can effectively share the external water pressure and surrounding rock pressure. This study provides a certain reference for the lining design of high-water-pressure tunnels.https://www.mdpi.com/2076-3417/12/15/7905tunnel under high water pressureradial groutingcurtain groutingdifference method |
| spellingShingle | Yanping Ding Xuefu Zhang Bin Zhang Preliminary Study on Double Lining Support Design for Water Plugging of Highway Tunnel under High Water Pressure in Mountain Area Based on Limited Drainage Applied Sciences tunnel under high water pressure radial grouting curtain grouting difference method |
| title | Preliminary Study on Double Lining Support Design for Water Plugging of Highway Tunnel under High Water Pressure in Mountain Area Based on Limited Drainage |
| title_full | Preliminary Study on Double Lining Support Design for Water Plugging of Highway Tunnel under High Water Pressure in Mountain Area Based on Limited Drainage |
| title_fullStr | Preliminary Study on Double Lining Support Design for Water Plugging of Highway Tunnel under High Water Pressure in Mountain Area Based on Limited Drainage |
| title_full_unstemmed | Preliminary Study on Double Lining Support Design for Water Plugging of Highway Tunnel under High Water Pressure in Mountain Area Based on Limited Drainage |
| title_short | Preliminary Study on Double Lining Support Design for Water Plugging of Highway Tunnel under High Water Pressure in Mountain Area Based on Limited Drainage |
| title_sort | preliminary study on double lining support design for water plugging of highway tunnel under high water pressure in mountain area based on limited drainage |
| topic | tunnel under high water pressure radial grouting curtain grouting difference method |
| url | https://www.mdpi.com/2076-3417/12/15/7905 |
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