摘要
为研究综合管廊对既有地铁隧道的影响程度,本文以某管廊工程为例,建立二维和三维数值模型,探讨管廊施工对地铁隧道变形和受力的影响程度。结果表明,二维计算的位移和内力值比三维的要大,三维计算的Z向竖向位移、总位移约为二维计算的98.6%,97.6%,三维计算的弯矩、剪力、轴力约为二维计算的83.3%,92.4%,76.3%,三维数值分析能更全方位反映地铁隧道的变形和受力特性,同时提出对处于深厚软土和砂土的项目应提前对软土层进行预加固,施工时应采用振动幅度小的机械,实施对地铁隧道的椭变进行重点监测等地铁保护措施,所得结论对类似工程具有一定的参考价值。
In order to study the influence of integrated pipe corridor on existing subway tunnels,this paper takes a pipe corridor project as an example,establish two and three dimensional numerical models,and discuss the influence of pipe corridor construction on the deformation and stress of subway tunnels.The results show that the displacement and internal force values calculated in two dimensions are larger than those in three dimensions,the Z-vertical displacement and total displacement calculated in three dimensions are about 98.6%and 97.6%of those calculated in two dimensions,the bending moment,shear force and axial force calculated in three dimensions are about 83.3%,92.4%and 76.3%of those calculated in two dimensions,three-dimensional numerical analysis can reflect the deformation and stress characteristics of subway tunnels in a more comprehensive way,at the same time,it is suggested that for projects in deep soft soil and sandy soil,soft soil should be pre-reinforced in advance,machinery with small vibration amplitude should be used in construction,and subway protection measures such as special monitoring of subway tunnel ellipticity should be implemented,the conclusions obtained have certain reference value for similar projects.
作者
黎钜宏
LI Juhong(Foshan Metro Construction Co.,Ltd.,Foshan Guangdong 528000,China)
出处
《北方建筑》
2023年第6期35-38,共4页
Northern Architecture
关键词
管廊
地铁隧道
数值分析
地铁保护
pipe corridor
subway tunnel
numerical analysis
subway protection
