Wangping Qian , Bo Wang , Dingwei Luo , An Xu , Shuchen Li
{"title":"岩溶隧道排水系统不同堵塞速率下隧道衬砌力学特性试验研究及应用","authors":"Wangping Qian , Bo Wang , Dingwei Luo , An Xu , Shuchen Li","doi":"10.1016/j.tust.2024.106359","DOIUrl":null,"url":null,"abstract":"<div><div>Blockage defects frequently occur in tunnel drainage systems during construction in karst regions, potentially damaging the tunnel lining structure. Therefore, understanding the impact of drainage system blockages on tunnel safety is essential for mitigating defects and extending the tunnel’s service life. Using a karst tunnel project in Zhejiang Province, China as a case study, a laboratory model experiment was conducted to analyze drainage capacity and the evolution of the lining’s mechanical properties under various drainage system blockage rates. Based on a karst tunnel project in Zhejiang Province, China, the laboratory model experiment is carried out to analyze the drainage capacity and the evolution of mechanical properties of the tunnel lining under different blockage rates of the tunnel drainage system. The experimental results demonstrate that the simplified drainage system employed in the laboratory model is both reliable and operationally efficient, enabling more accurate quantification of drainage capacity. The tunnel drainage volume gradually decreases at a slow rate from 0 % to 60 % blockage rate. Once the blockage rate surpasses 60 %, the drainage volume declines sharply, with reductions reaching up to 83.73 %. Both water pressure and lining stress exhibit nonlinear increases as the drainage system blockage rate rises. Furthermore, this trend can be divided into three stages: rapid increase (0 ∼ 40 %), slow increase (40 %∼80 %), and rapid increase again (80 %∼100 %). The blockage degree of the drainage system is classified into five levels based on observed trends, and corresponding relationships are established between blockage degree and blockage rate. Additionally, a 40 % blockage rate is identified as a comprehensive blockage threshold for ensuring the lining’s structural safety. Finally, the tunnel drainage system design was optimized to address deficiencies in the original design. The modified drainage system’s capacity is 28.1 times greater than that of the original design, significantly reducing blockage defects in karst tunnels. These findings have theoretical significance for addressing safety issues caused by drainage system blockages in karst tunnels and serve as an important reference for optimizing drainage systems in future projects.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"157 ","pages":"Article 106359"},"PeriodicalIF":7.4000,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Experimental investigation and application on mechanical properties of tunnel linings under different blockage rates of drainage system in a karst tunnel\",\"authors\":\"Wangping Qian , Bo Wang , Dingwei Luo , An Xu , Shuchen Li\",\"doi\":\"10.1016/j.tust.2024.106359\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Blockage defects frequently occur in tunnel drainage systems during construction in karst regions, potentially damaging the tunnel lining structure. Therefore, understanding the impact of drainage system blockages on tunnel safety is essential for mitigating defects and extending the tunnel’s service life. Using a karst tunnel project in Zhejiang Province, China as a case study, a laboratory model experiment was conducted to analyze drainage capacity and the evolution of the lining’s mechanical properties under various drainage system blockage rates. Based on a karst tunnel project in Zhejiang Province, China, the laboratory model experiment is carried out to analyze the drainage capacity and the evolution of mechanical properties of the tunnel lining under different blockage rates of the tunnel drainage system. The experimental results demonstrate that the simplified drainage system employed in the laboratory model is both reliable and operationally efficient, enabling more accurate quantification of drainage capacity. The tunnel drainage volume gradually decreases at a slow rate from 0 % to 60 % blockage rate. Once the blockage rate surpasses 60 %, the drainage volume declines sharply, with reductions reaching up to 83.73 %. Both water pressure and lining stress exhibit nonlinear increases as the drainage system blockage rate rises. Furthermore, this trend can be divided into three stages: rapid increase (0 ∼ 40 %), slow increase (40 %∼80 %), and rapid increase again (80 %∼100 %). The blockage degree of the drainage system is classified into five levels based on observed trends, and corresponding relationships are established between blockage degree and blockage rate. Additionally, a 40 % blockage rate is identified as a comprehensive blockage threshold for ensuring the lining’s structural safety. Finally, the tunnel drainage system design was optimized to address deficiencies in the original design. The modified drainage system’s capacity is 28.1 times greater than that of the original design, significantly reducing blockage defects in karst tunnels. These findings have theoretical significance for addressing safety issues caused by drainage system blockages in karst tunnels and serve as an important reference for optimizing drainage systems in future projects.</div></div>\",\"PeriodicalId\":49414,\"journal\":{\"name\":\"Tunnelling and Underground Space Technology\",\"volume\":\"157 \",\"pages\":\"Article 106359\"},\"PeriodicalIF\":7.4000,\"publicationDate\":\"2025-01-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Tunnelling and Underground Space Technology\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0886779824007776\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Tunnelling and Underground Space Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0886779824007776","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
Experimental investigation and application on mechanical properties of tunnel linings under different blockage rates of drainage system in a karst tunnel
Blockage defects frequently occur in tunnel drainage systems during construction in karst regions, potentially damaging the tunnel lining structure. Therefore, understanding the impact of drainage system blockages on tunnel safety is essential for mitigating defects and extending the tunnel’s service life. Using a karst tunnel project in Zhejiang Province, China as a case study, a laboratory model experiment was conducted to analyze drainage capacity and the evolution of the lining’s mechanical properties under various drainage system blockage rates. Based on a karst tunnel project in Zhejiang Province, China, the laboratory model experiment is carried out to analyze the drainage capacity and the evolution of mechanical properties of the tunnel lining under different blockage rates of the tunnel drainage system. The experimental results demonstrate that the simplified drainage system employed in the laboratory model is both reliable and operationally efficient, enabling more accurate quantification of drainage capacity. The tunnel drainage volume gradually decreases at a slow rate from 0 % to 60 % blockage rate. Once the blockage rate surpasses 60 %, the drainage volume declines sharply, with reductions reaching up to 83.73 %. Both water pressure and lining stress exhibit nonlinear increases as the drainage system blockage rate rises. Furthermore, this trend can be divided into three stages: rapid increase (0 ∼ 40 %), slow increase (40 %∼80 %), and rapid increase again (80 %∼100 %). The blockage degree of the drainage system is classified into five levels based on observed trends, and corresponding relationships are established between blockage degree and blockage rate. Additionally, a 40 % blockage rate is identified as a comprehensive blockage threshold for ensuring the lining’s structural safety. Finally, the tunnel drainage system design was optimized to address deficiencies in the original design. The modified drainage system’s capacity is 28.1 times greater than that of the original design, significantly reducing blockage defects in karst tunnels. These findings have theoretical significance for addressing safety issues caused by drainage system blockages in karst tunnels and serve as an important reference for optimizing drainage systems in future projects.
期刊介绍:
Tunnelling and Underground Space Technology is an international journal which publishes authoritative articles encompassing the development of innovative uses of underground space and the results of high quality research into improved, more cost-effective techniques for the planning, geo-investigation, design, construction, operation and maintenance of underground and earth-sheltered structures. The journal provides an effective vehicle for the improved worldwide exchange of information on developments in underground technology - and the experience gained from its use - and is strongly committed to publishing papers on the interdisciplinary aspects of creating, planning, and regulating underground space.