带聚脲涂层夹层的新型水工隧道复合衬砌研究

IF 1.5 4区 工程技术 Q3 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS
Bingqi Li, Jilei Zhang, Xiaonan Liu, Tianyi Meng
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引用次数: 0

摘要

目的 多层复合衬砌结构是水工隧道的主要结构形式。然而,多层复合衬砌的承载机理尚未得到深入研究。现有的许多设计方案并不能很好地实现结构安全性、抗渗能力和成本效益之间的平衡。因此,本研究提出了一种新型复合衬砌结构类型及其理论模型。设计/方法/途径本研究提出了一种带有聚脲喷涂中间层的新型水工隧道复合衬砌结构。利用有限元模型和现有理论模型,开发并验证了基于状态空间法的理论模型。根据理论模型进行了参数分析,研究了界面剪切刚度、内衬厚度和外衬弹性模量等各种变量的影响。复合衬垫系统的整体变形刚度随界面剪切刚度的增加而增加。喷涂涂层夹层会显著影响外衬和内衬之间的残余力分布,调整外衬和内衬的厚度也会影响残余力分布。原创性/价值随着我国水利工程的发展,复杂的地质条件、高围岩应力、高内外水压力等独特的应用场景逐渐增多。这就对水工隧洞衬砌结构的承载性能和防渗性能提出了更高的要求。另一方面,传统的水工隧道衬砌结构很难在经济性、结构安全性和防渗性之间取得令人满意的平衡。因此,拟议的结构具有广泛的应用潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigation of a novel hydraulic tunnel composite lining with polyurea coating interlayer

Purpose

Multilayer composite liner structures are the primary structural form of hydraulic tunnels. However, the bearing mechanism of multilayer composite liners has not been investigated thoroughly. Many existing design schemes do not properly achieve a balance between structural safety, anti-seepage capacity, and cost effectiveness. Thus, a new composite liner structure type and its theoretical model was proposed.

Design/methodology/approach

A novel hydraulic tunnel composite liner structure with a polyurea spray coating interlayer was proposed in this study. A theoretical model based on the state-space method was developed and verified using FEM models and existing theoretical models. Parametric analysis was conducted based on the theoretical model to investigate the influence of various variables, including interfacial shear stiffness, inner liner thickness, and outer liner elastic modulus.

Findings

It was concluded that the proposed theoretical model can be used successfully to calculate multilayer composite liner structures with high calculation efficiency. The overall deformation stiffness of the composite liner system increased with the interfacial shear stiffness. The sprayed coating interlayer significantly affects the residual force distribution between the outer and inner liners, which can also be affected by the adjustment of the thickness of the outer and inner liners. Thus, attention should be paid to these factors in the rational design of the proposed composite liner system.

Originality/value

With the development of China’s water conservancy projects, complex geological conditions, high surrounding rock stress, high internal and external water pressures, and other unique application scenarios have gradually increased. This places higher requirements on the bearing performance and impermeability of hydraulic tunnel lining structures. On the other hand, conventional hydraulic tunnel lining structures can hardly achieve a satisfactory balance between economy, structural safety, and impermeability. Thus, the proposed structure has the potential to be used in a wide range of applications.

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来源期刊
Engineering Computations
Engineering Computations 工程技术-工程:综合
CiteScore
3.40
自引率
6.20%
发文量
61
审稿时长
5 months
期刊介绍: The journal presents its readers with broad coverage across all branches of engineering and science of the latest development and application of new solution algorithms, innovative numerical methods and/or solution techniques directed at the utilization of computational methods in engineering analysis, engineering design and practice. For more information visit: http://www.emeraldgrouppublishing.com/ec.htm
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