基于PLAXIS 3D的围岩变形规律分析
Analysis of Surrounding Rock Deformation Law Based on PLAXIS 3D
张蓓 1陈晓艳 1王玲 1张琳1
作者信息
- 1. 江西东通交通科技股份有限公司陕西分公司,陕西 咸阳 712000
- 折叠
摘要
针对隧道施工过程中不同施工参数对隧道围岩变形的影响,以柳埠隧道为研究对象,建立有限元模型,分析不同支护强度和不同开挖进尺对围岩变形的影响规律.研究结果显示,在隧道开挖过程中,隧道围岩拱顶沉降和周边收敛与隧道的支护强度成负相关关系,与隧道的开挖进尺呈正相关关系.通过对隧道围岩拱顶沉降和周边收敛最大值进行多项式拟合,得出结论:在研究范围内,衬砌强度增加,对隧道拱顶沉降和周边收敛最大值的影响强度逐渐增加,开挖进尺增加,对隧道拱顶沉降最大值的影响强度逐渐增加,对隧道周边收敛最大值的影响强度逐渐减弱.
Abstract
In order to study the image of surrounding rock deformation caused by different construction parameters during tunnel con-struction,a finite element model was established based on the engineering background of Liupu Tunnel,and the influence laws of differ-ent support strength and excavation footage on surrounding rock deformation during tunnel construction were analyzed.The results show that during tunnel excavation,the arch settlement and surrounding convergence of surrounding rock are negatively correlated with the support strength of tunnel,but positively correlated with the tunneling footage.At the same time,a polynomial fitting is carried out on the settlement of the tunnel vault and the maximum convergence of the surrounding rock.According to the fitting curve,within the study range,with the increase of the lining strength,the influence strength on the settlement of the tunnel vault and the maximum convergence of the surrounding convergence gradually increases,and with the increase of the excavation progress,the influence strength on the maxi-mum settlement of the tunnel vault gradually increases.
关键词
围岩变形/数值模拟/隧道安全Key words
surrounding rock deformation/numerical simulation/tunnel safety引用本文复制引用
出版年
2024
NETL
NSTL
万方数据