摘要
为研究半填半挖地基条件下综合管廊工作性状,建立了综合管廊有限元模型并验证了其有效性,通过研究发现:综合管廊结构的顶板和底板内侧以受拉为主,左、右侧板内侧以受压为主,随地基刚度横向差异增大,地基刚度较小一侧的综合管廊右侧板上部受拉、下部受压,且变形持续增大;在不同地基刚度横向差异条件下,综合管廊结构的挠度变形不一,结构变形顺序依次为底板、顶板、左侧板、右侧板,结构开裂顺序依次为底板、右侧板、顶板、左侧板;综合管廊结构竖向沉降大于水平位移,相对转角位移基本呈线性增长,结构整体向地基刚度相对较小的一侧倾斜,可导致综合管廊结构节间出现扭转变形、错位。
In order to study the working behavior of utility tunnel under semi-fill and semi-cut foundation conditions,the finite element model of utility tunnel is established and its effectiveness is verified. The results show that the top plate and bottom plate of the utility tunnel are mainly under tension, and the inner sides of the left and right plates are mainly under compression. With the increase of the transverse difference of the foundation stiffness, tension of the top, which is the right of the utility tunnel with less stiffness, and deformation by compression of the lower part increases. Under the condition of transverse difference of foundation stiffness, the deflection deformations of the utility tunnel are different. The sequence of structural deformation is bottom plate, top plate, left column and right plate. The sequence of structural crack is bottom plate, right plate, top plate and left column. The vertical settlement is obviously greater than the horizontal one. The relative rotation angle displacement basically shows a linear growth. The whole structure tilts to the side with relatively smaller stiffness and cause torsional deformation and dislocation between the structural nodes of the utility tunnel.
作者
陈希华
谢忠球
吴敬龙
刘创
Chen Xihua;Xie Zhongqiu;Wu Jinglong;Liu Chuang(Changsha Power Supply Branch,State Grid Hunan Electric Power Corporation,Changsha 41000,China;School of Civil Engineering,Central South University of Forestry and Technology,Changsha 41000,China)
出处
《市政技术》
2022年第2期54-59,85,共7页
Journal of Municipal Technology
基金
国家自然科学基金(51408617)
湖南省省级工程建设新技术研发与软科学研究计划项目(430S00711/2018-42557)。
关键词
综合管廊
半填半挖地基
工作性状
utility tunnel
semi-filled and semi-excavated foundation
working behavior
