面向复杂环境的水工隧洞衬砌结构承载特性分析  

Analysis of Bearing Characteristics of Hydraulic Tunnel Lining Structure Facing Complex Environment

作　　者：王纬一 赵翠侠 WANG Weiyi;ZHAO Cuixia(Guangdong Water Conservancy and Electric Power Survey and Design Institute Co.,Ltd.,Guangzhou 510635,China)

机构地区：[1]广东省水利电力勘测设计研究院有限公司,广州510635

出　　处：《广东水利水电》2025年第4期64-68,73,共6页Guangdong Water Resources and Hydropower

摘　　要：针对复杂环境下水工隧洞衬砌结构的力学问题,建立内外衬砌联合受力的力学模型,利用Abaqus软件仿真技术,引入位移插值法提升模拟精度。先建立灌浆式预应力衬砌受力特征分析模型,量化预应力灌浆层对衬砌结构力学特征的影响;推导出衬砌内力计算公式,在Abaqus中建立有限元模型并精确计算,采用位移插值法进一步提高模型精度。结果显示:以甘肃省引洮供水一期工程为例,1 m处弯矩最大值约270 kN·m,3 m和5 m处减小至约240 kN·m;轴力随距离增加而减小,1 m处轴向应力值约为260 kN,逐渐降低至接近0;剪力峰值在3 m处约为50 kN。水位从0 m升至8 m时,弯矩最大值增幅达57%,轴力最大值增幅达80%,剪力最大值增幅达100%。因此,弯矩、轴力和剪力值的增加体现了水位上升和衬砌厚度增加对水工隧洞衬砌结构内力的显著影响。研究方法对完善水工隧洞设计理论、指导工程实践、确保结构安全与运行稳定具有重要意义。With the continuous improvement of national infrastructure level,the demand for hydraulic tunnel construction has been increasing year by year,and tunnel construction is facing complex water conditions such as large cross-section,high internal pressure,and variable internal and external loads.The traditional single-layer lining structure is difficult to meet the demand,the stress of hydraulic tunnels is complex,the calculation theory and design methods of lining structures are incomplete,and the accuracy of structural bearing capacity analysis needs to be improved.In response to the mechanical problems of the lining structure of hydraulic tunnels in complex environments,this paper establishes a mechanical model of the joint force of the inner and outer lining,and uses Abaqus software simulation technology to introduce displacement interpolation method to improve simulation accuracy.Firstly,establish a force characteristic analysis model for grouting type prestressed lining,and quantify the influence of prestressed grouting layer on the mechanical characteristics of lining structure;Derive the formula for calculating the internal force of the lining,establish a finite element model in Abaqus and accurately calculate it,and further improve the model accuracy by using displacement interpolation method.The results show that,taking the first phase of the Tao River Water Supply Project in Gansu Province as an example,the maximum bending moment at 1 meter is about 270 kN·m,and it decreases to about 240 kN·m at 3 and 5 meters;The axial force decreases with increasing distance,and the axial stress value at 1 meter is about 260kN,gradually decreasing to near zero;The peak shear force is about 50kN at 3 meters.When the water level rises from 0m to 8m,the maximum increase in bending moment reaches 57%,the maximum increase in axial force reaches 80%,and the maximum increase in shear force reaches 100%.Therefore,the increase in bending moment,axial force,and shear force reflects the significant impact of rising water level a

关 键 词：复杂环境 水工隧洞 衬砌结构 承载特性 

分 类 号：TV672.1[水利工程—水利水电工程] TU312[建筑科学—结构工程]