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

IF 7.4 1区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Wangping Qian , Bo Wang , Dingwei Luo , An Xu , Shuchen Li
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引用次数: 0

摘要

岩溶地区隧道排水系统在施工过程中经常出现堵塞缺陷,对隧道衬砌结构有潜在的破坏作用。因此,了解排水系统堵塞对隧道安全的影响,对于减少缺陷和延长隧道的使用寿命至关重要。以浙江省某岩溶隧道工程为例,通过室内模型试验,分析了不同排水系统堵塞速率下衬砌排水能力及力学性能的演变规律。以浙江省某岩溶隧道工程为例,开展室内模型试验,分析了隧道排水系统不同堵塞率下隧道衬砌的排水能力及力学性能的演变规律。实验结果表明,实验室模型采用的简化排水系统既可靠又高效,可以更准确地量化排水能力。隧道排水量在堵塞率为0% ~ 60%时缓慢递减。一旦堵塞率超过60%,排水量急剧下降,降幅达83.73%。随着排水系统堵塞率的增加,水压力和衬砌应力均呈非线性增加。而且,这一趋势可以分为△快速增长(0 ~ 40%)△缓慢增长(40% ~ 80%)△再次快速增长(80% ~ 100%)3个阶段。根据观测趋势将排水系统的堵塞程度划分为5个等级,并建立了堵塞程度与堵塞速率的对应关系。此外,确定了40%的堵塞率作为保证衬砌结构安全的综合堵塞阈值。最后,对隧道排水系统设计进行了优化,解决了原设计中的不足。改进后的排水系统容量是原设计的28.1倍,显著减少了岩溶隧道的堵塞缺陷。研究结果对解决岩溶隧道排水系统堵塞带来的安全问题具有理论意义,为今后工程中优化排水系统提供重要参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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.
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来源期刊
Tunnelling and Underground Space Technology
Tunnelling and Underground Space Technology 工程技术-工程:土木
CiteScore
11.90
自引率
18.80%
发文量
454
审稿时长
10.8 months
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.
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