摘要
考察隧道围岩等级、爆破载荷、支护厚度等因素对爆破冲击下隧道初期支护动态响应的影响,为隧道初期支护施工设计提供理论依据。以瑞丽至孟连高速公路勐省隧道工程为项目背景,以隧道衬砌振动速度和位移响应为主要评判标准,选取关键监测点,采用数值模拟方法分析各因素对隧道初期支护的变化规律。研究发现:在相同爆破载荷(装药量)下,随着隧道围岩等级的提高,隧道支护动态响应变得更加剧烈;在爆破施工中,装药量与隧道初期支护动态响应呈线性正相关,支护厚度与隧道初期支护动态响应呈负相关。据此,提出了保障隧道施工安全的建议,为隧道初期支护相关工程设计提供了理论范式。
The influences of factors such as surrounding rock grade of tunnel,blasting load,support thickness on the dynamic response of tunnel primary support under blasting impact were investigated to provide a theoretical basis for the construction design of tunnel primary support.Taking the Mengsheng Tunnel Project of Ruili-Menglian Expressway as the project background,taking the vibration velocity and displacement response of the tunnel lining as the main evaluation criteria,the key monitoring points were selected,and the numerical simulation method was used to analyze the change law of various factors on the tunnel primary support.Findings:under the same blasting load(charge),the dynamic response of tunnel support becomes more severe with the increase of the surrounding rock grade of tunnel;in the blasting construction,the charge is linearly positively correlated with the dynamic response of tunnel primary support;the support thickness is negatively correlated with the dynamic response of tunnel primary support.Accordingly,suggestions were put forward to ensure the safety of tunnel construction,which provides a theoretical paradigm for the engineering design of tunnel primary support.
作者
王泰恒
蒋新闻
陈猛
薄澎涛
王国超
WANG Taiheng;JIANG Xinwen;CHEN Meng;BO Pengtao;WANG Guochao(Southwest Forestry University,Kunming 650044,China;Yunnan Jiaotou Highway Construction Sixth Engineering Co.,Ltd.,Kunming 650044,China)
出处
《工业技术创新》
2023年第5期12-18,共7页
Industrial Technology Innovation
基金
云南省先进装备智能制造技术重点实验室开放基金课题(项目编号:KLYAEIMTY2022002)。
关键词
隧道初期支护
隧道围岩等级
支护厚度
装药量
动态响应
数值模拟
Tunnel Primary Support
Surrounding Rock Grade of Tunnel
Support Thickness
Charge
Dynamic Response
Numerical Simulation
作者简介
王泰恒(1996-),男,山东济南人,硕士。主要研究方向:机械设计及结构动特性仿真;蒋新闻(1974-),男,湖北黄梅人,高级工程师。研究方向:桥梁隧道施工工艺及钢结构设计;通信作者:陈猛(1972-),男,四川武胜人,博士,教授。主要研究方向:计算机辅助工程及机械动力学仿真。E-mail:chenmengcm2008@126.com;薄澎涛(1996-),男,山西临汾人,硕士在读。研究方向:机械设计及结构动特性仿真;王国超(1998-),男,江西上饶人,硕士在读。研究方向:机械设计及结构动特性仿真。
