收敛-约束法在软岩隧道设计与开挖中的应用  

Application of Convergence Constraint Method in Soft Rock Tunnel Design and Excavation

作　　者：王鸿 WANG Hong

机构地区：[1]福建省交设工程咨询有限公司,福建福州350004

出　　处：《福建建设科技》2023年第6期50-53,共4页Fujian Construction Science & Technology

摘　　要：本文以某软岩隧道的现场监控量测数据为基础,先进行回归分析得出围岩的变形曲线;然后利用相关数值模拟软件对软岩开挖过程中的变形情况进行模拟分析;最后基于收敛约束法理论并基于实际情况对其进行安全性评价。最终研究结果表明,当支护设计采用的是弹塑性模型时结构的整体安全性较低,因此在实际工程中应考虑应变的软化条件,这样在提高围岩安全系数同时亦能更符合实际工程状况。Based on the on-site monitoring measurement data of a soft rock tunnel,this article first conducts regression analysis to obtain the deformation curve of the surrounding rock;Then,relevant numerical simulation software is used to simulate and analyze the deformation during the excavation process of soft rock;Finally,based on the theory of convergence constraint method and actual situation,its safety evaluation is conducted.The final research results indicate that the overall safety of the structure is lower when the support design adopts an elastic-plastic model.Therefore,the softening condition of strain should also be taken into account in practical engineering,so as to improve the safety factor of surrounding rock and better conform to the actual engineering conditions.

关 键 词：软岩隧道 收敛-约束法 监控量测 FLAC3D 

分 类 号：U45[建筑科学—桥梁与隧道工程]