不同截面形式的波纹钢综合管廊结构受力性能分析

Analysis on Stress Performance of Corrugated Steel Utility Tunnel Structure with different Section Forms

依托平遥古城基础设施提升改造项目中综合管廊建设工程,针对波纹钢综合管廊结构,利用有限元软件构建不同截面形式的三维土层-结构数值模型,探究不同截面形式对波纹钢管廊结构受力特点和变形规律的影响。同时揭示了不同断面形式的波纹钢管廊结构最不利受力位置,分析了超载作用对波纹钢管廊结构受力性能的影响。研究结果表明:矩形断面波纹钢综合管廊结构受力性能良好。圆形断面和马鞍形断面结构腰部位置横向变形和内力最大,矩形断面结构4个角处节点的变形和受力最大。不同断面形式的管廊结构底部均向内收缩变形,且管廊结构竖向变形量比横向变形量大。因此,在实际工程中,应关注波纹钢管廊结构变形量,尤其是结构竖向变形。

Relying on the construction of utility tunnel in Pingyao Ancient City Infrastructure Upgrading and Reconstruction Project,aiming at the corrugated steel utility tunnel structure,the three-dimensional soil-structure numerical models in the different section forms is established by using finite element software to explore the influences of the different section forms on the stress characteristics and deformation law of corrugated steel utility tunnel structure.The most unfavorable stress position of corrugated steel utility tunnel structure with different section forms is revealed.The influence of overload on the stress performance of corrugated steel utility tunnel structure is analyzed.The results show that the rectangular section corrugated steel utility tunnel has the good stress performance.The transverse deformation and internal force at the waist of circular section and saddle section structures are the largest,while the deformation and stress of joints at four corners of rectangular section structure are the largest.The bottoms of the utility tunnel structure with different section forms all shrink inward and deform,and the vertical deformation of the utility tunnel structure is greater than the lateral deformation.Therefore,in the actual project,the attention should be paid to the structural deformation of the corrugated steel utility tunnel,especially the vertical deformation of the structure.