采用PHASE2软件的隧洞一次支护数值模拟与分析  

Numerical simulation and analysis of primary support of tunnel based on PHASE2

作　　者：刘卓 穆全平[1] LIU Zhuo;MU Quanping(China Water Resources Beifang Investigation,Design&Research Co.Ltd,Tianjin 300222,China)

机构地区：[1]中水北方勘测设计研究有限责任公司,天津300222

出　　处：《水科学与工程技术》2024年第1期37-39,共3页Water Sciences and Engineering Technology

摘　　要：处于V类围岩的隧洞施工时,通常要采取一次支护以保证围岩稳定。采用PHASE2岩土工程弹塑性有限元分析软件,对某引调水工程中处于V类围岩的隧洞围岩位移与塑性区分布进行模拟分析。结果表明:在不采取支护措施情况下,隧洞施工时将发生坍塌破坏,具有极大的安全隐患;在采取拟定措施后,围岩总位移满足规范要求,且未发生塑性破坏,因此支护后隧洞达到稳定且安全的状态,验证支护措施的有效性。但为保证工程安全,建议施工期间做好排水措施,并缩短施工开挖、一次支护措施之间的施工间隔,使支护尽早发挥作用。The primary support is usually essential for the tunnel in class V during construction in order to ensure the stability of the surrounding rock.In this paper,the displacement and plastic zone distribution of the surrounding rock for one tunnel in class Vis simulated and analyzed in a water diversion project based on PHASE2.The results indicate that the tunnel will be collapsed without the support measures and it has a great potential safety hazard.After taking the proposed measures,the total displacement of the surrounding rock meets the requirements of the specification,and no plastic damage occurs.However,in order to ensure the safety of the project,it is suggested that drainage measures should be taken during the construction,and the construction interval between construction excavation and primary support measures should be shortened,so that the support can play a role as soon as possible.

关 键 词：隧洞开挖 一次支护 PHASE2 数值模拟 

分 类 号：TV314[水利工程—水工结构工程]