隧道结构耐久性环境分类及等级划分研究  

A Study on the Classification and Grading of Environmental Effects on Tunnel Structure Durability

作　　者：冯冀蒙[1] 田明阳[2] 

机构地区：[1]西南交通大学(峨眉校区)土木工程系,峨眉614202 [2]西南交通大学土木工程学院,成都610031

出　　处：《现代隧道技术》2014年第3期85-90,共6页Modern Tunnelling Technology

基　　金：中央高校基本科研业务费专项资金资助(2682014CX005EM)

摘　　要：隧道结构不同于地面结构,结构体系及环境都有其特殊性,以地面结构传统的材料耐久性研究为主的狭义耐久性设计思路无法解决隧道结构的耐久性问题。文章通过对隧道结构、环境以及病害发生特点的分析,并结合当前规范的环境划分的相关规定,将隧道结构环境划分为普遍环境、侵蚀环境和冻融环境三类,每一类中根据对结构的危害程度划分为三个等级;针对不同的环境组合情况又划分为五个综合等级,并从隧道结构体系及材料两个方面提出了耐久性的保障措施。The structural system and environment structure of a tunnel are distinctive from those of a structure on the ground, and the application of ground structure based durability design parameters to tunnel design has some flaws. By analyzing the structure, environment, and features of tunnel defects, in combination with the current code for environment classification, the structural environment of tunnels are classified into the three categories of general environment, erosive environment, and freezing and thawing environment, and each category is sub-classified as one of three grades according to the tunnel structure hazard levels. Additionally, five comprehensive grades are established based on various environmental combinations and safeguard measures are proposed regarding the durability of the tunnel structure system and the material.

关 键 词：隧道结构 耐久性 环境分类 作用等级 

分 类 号：U451.4[建筑科学—桥梁与隧道工程] X141[交通运输工程—道路与铁道工程]