高速公路隧道超前小导管支护施工及有限元分析  

Construction and Finite Element Analysis of Advanced Small Duct Support in Expressway Tunnel

作　　者：张秀玲 孟凡涛[2] Zhang Xiuling;Meng Fantao(Shandong Jinyi Hengtong Testing Technology Co.Ltd.,Dongying,Shandong 257400;Shandong Transport Vocational College,Weifang,Shandong 261206)

机构地区：[1]山东津益恒通检测科技有限公司,山东东营257400 [2]山东交通职业学院,山东潍坊261206

出　　处：《江西建材》2024年第12期279-281,共3页

摘　　要：为提升隧道超前小导管支护施工质量,文中以某公路单洞双车道隧道为例,通过MIDAS/GTS有限元软件建立三维数值计算模型,对隧道施工时超前小导管支护施工效果进行分析。结果表明,有、无超前小导管注浆加固对隧道围岩变形的影响较大,对地表的沉降量影响不明显;采用双排超前小导管支护后隧道拱顶的位移减小约21.9%,掌子面水平位移减小约44.1%;有、无超前小导管注浆对隧道水平收敛、拱顶隆起的影响也不显著。In order to improve the construction quality of tunnel advanced small conduit support,this paper takes a highway single-hole twolane tunnel as an example,and establishes a three-dimensional numerical calculation model by MIDAS/GTS finite element software to analyze the construction effect of advanced small conduit support during tunnel construction.The results show that the influence of small pipe grouting on the deformation of tunnel surrounding rock is great,and the influence on the surface settlement is not obvious.The displacement of the tunnel arch is reduced by 21.9%and the horizontal displacement of the palm surface is reduced by 44.1%.The influence of small pipe grouting with and without advance on tunnel horizontal convergence and vault uplift is not significant.

关 键 词：高速公路隧道 超前小导管注浆加固 有限元 围岩变形 地表沉降 

分 类 号：U445[建筑科学—桥梁与隧道工程]