软弱路基加固对营运地铁隧道沉降影响研究  

Study on the Influence of Weak Subgrade Strengthening on the Settlement of Metro Tunnel in Operation

作　　者：李良俊 Li Liangjun(Guangdong Heavy Industry Architectural Design Institute Co.Ltd.,Guangzhou,Guangdong 510620)

机构地区：[1]广东省重工建筑设计院有限公司,广东广州510620

出　　处：《江西建材》2024年第10期224-226,共3页

摘　　要：为了提升地铁隧道运营安全性,文中通过有限元软件ANSYS研究路基加固施工层厚度、道路土体性质、土体弹性模量及隧道衬砌强度对隧道沉降量的影响,并进行分析。结果表明,隧道两端沉降量最小,越靠近隧道中间位置沉降量越大;隧道上方施加4层土的隧道最大沉降量与未施加土层相比增加了20%;隧道上方土体密度为2 250 kg/m^(3)比土体密度为1 850 kg/m^(3)的最大沉降量增加了2.6%;隧道上方隧道衬砌强度为35 GPa比隧道衬砌强度为30 GPa的最大沉降量增加了2.1%。综上,土层厚度、土体密度、土体弹性模量以及隧道衬砌强度,其数值越大,隧道中间位置沉降量越高。In order to improve the safety of subway tunnel operation,the finite element software ANSYS was used to analyze the influence of the thickness of roadbed reinforcement construction layer,the property of road soil,the elastic modulus of soil and the strength of tunnel lining on the tunnel settlement.The results show that the settlement is the smallest at both ends of the tunnel,and the greater the settlement is near the middle of the tunnel.The maximum settlement amount of the tunnel with 4 layers of soil above the tunnel increased by 20%compared with the unapplied layer.When the soil density is 2250 kg/m^(3),the maximum settlement over the tunnel is 2.6%higher than that of 1850 kg/m^(3).When the tunnel lining strength is 35 GPa,the maximum settlement above the tunnel is 2.1%higher than that when the tunnel lining strength is 30 GPa.In summary,the larger the soil layer thickness,soil density,soil elastic modulus and tunnel lining strength,the higher the settlement in the middle of the tunnel.

关 键 词：地铁隧道工程 软土路基 有限元 沉降量 

分 类 号：TU99[建筑科学—市政工程]