不同填土高度下超大直径钢波纹管拱涵的力学性能分析  

Mechanical properties analysis of super-large diameter steel corrugated pipe arch culverts under different high filling depths

作　　者：姜同辉 周锐 荣向波[3] 宋宇飞 JIANG Tonghui;ZHOU Rui;RONG Xiangbo;SONG Yufei(Guangdong Foyinghui Construction Engineering Management Co.Ltd.,Foshan 528000,Guangdong Province,P.R.China;School of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,Guangdong Province,P.R.China;China Communications Second Highway Survey and Design Institute Co.Ltd.,Wuhan 430058,Hubei Province,P.R.China)

机构地区：[1]广东佛盈汇建工程管理有限公司,广东佛山528000 [2]深圳大学土木与交通工程学院,广东深圳518060 [3]中交第二公路勘察设计研究院有限公司,湖北武汉430056

出　　处：《深圳大学学报（理工版）》2024年第6期739-747,共9页Journal of Shenzhen University(Science and Engineering)

基　　金：国家自然科学基金资助项目(52278311);广东省自然科学基金青年提升资助项目(2023A1515030148);深圳市科创委资助项目(JCYJ20220531101609020,GJHZ20220913143006012);中交二公院科研资助项目(CJGH-2017-131-004)。

摘　　要：施工阶段的填土高度对超大直径钢波纹管拱涵的力学性能影响较大.为保障超大直径钢波纹管拱涵的施工安全,建立12个超大直径钢波纹管拱涵的整体结构有限元模型,分别计算其自重与土压力、自重与车辆荷载共同作用下整体结构的变形与所受应力.建立直径8.79 m第1号波纹管和直径11.00 m第6号波纹管的精细化有限元模型,分析这两种直径拱涵在不同施工阶段填土高度下的受力和变形特征.结果表明,随着填土高度增加到7 m,第1号波纹管的竖向位移与应力不断增加,第6号波纹管的位移与应力先减后增,管顶与管底的水平位移很小,但竖向位移很大;在自重与土应力作用下,土体和波纹管的最大竖向位移分别为67.16 mm和39.28 mm,波纹管的最大拉力与压力分别为13.95 MPa和2.95 MPa;在自重与车辆作用下,波纹管的最大竖向位移为10.37 mm,最大拉力与压力分别为26.65 MPa和0.47 MPa.以上结果均满足拱涵结构的变形与受力要求,对于不同填土高度下较大的结构竖向变形,建议提高底层土体的压实度.研究成果对超大直径钢波纹管涵的推广应用具有重要意义.The filling height during the construction phase has a significant impact on the mechanical properties of super-large-diameter steel bellows arch culverts.To ensure the construction safety of super-large-diameter steel bellows arch culverts,this paper established 12 super-large-diameter steel bellows arch culverts,and calculated the deformation and stress of the overall structure under the operation stage of self-weight,vehicle load and earth pressure;then the refined finite element models of the No.1 bellows with a diameter of 8.79 m and the No.6 bellows with a diameter of 11.00 m were established.The deformation characteristics and stress of the two corrugated pipe culverts with different diameters were analyzed under different filling heights at different construction stages.The results show that,as the fill height increases to 7 m,the vertical displacement and stress of the No.1 bellows increase continuously,while the displacement and stress of the No.6 bellows initially decrease and then increase,and the horizontal displacements at the top and bottom of the pipe are very small but their vertical displacements are very large.Under the combined action of self-weight and soil stress,the maximum vertical displacement of the soil and bellows is 67.16 mm and 39.28 mm,respectively,and the maximum tension and pressure of bellows are 13.95 MPa and 2.95 MPa;Under the vehicle load,the maximum vertical displacement of the bellows is 10.37 mm,and the maximum tension and pressure of the bellows are 26.65 MPa and 0.47 MPa,respectively.Thus,all the above calculation results meet the structural deformation and stress requirements.As for the larger structural vertical deformations under different fill heights,it is recommended to increase the compaction of the underlying soil.The research results are of great significance for the promotion and application of ultra-large diameter steel corrugated pipe culverts.

关 键 词：桥梁与隧道工程 超大直径波纹管拱涵 整体与局部结构模型 施工阶段 变形与受力 

分 类 号：U448.1[建筑科学—桥梁与隧道工程] U448.3[交通运输工程—道路与铁道工程]