公路隧道岩体质量分级的模糊层次分析法  

Rock mass classification method in highway tunnel based on fuzzy analytic hierarchy process

作　　者：鲁光银[1] 朱自强[1] 李华[2] 熊瑛[1] 韩旭理[3] 

机构地区：[1]中南大学信息物理工程学院,湖南长沙410083 [2]成都地质矿产研究所,四川成都610081 [3]中南大学信息科学与工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2008年第2期368-374,共7页Journal of Central South University:Science and Technology

基　　金：交通部西部交通建设科技项目(200231800021);湖南省科技计划资助项目(05SK3077)

摘　　要：建立公路隧道岩体质量分级的模糊层次分析法(AHP),对影响公路隧道岩体质量分级的各因素进行分析和调整,建立层次关系,构造阶层结构;采用模糊理论建立正倒值矩阵,计算各因素权重,建立各因素评分准则,根据专家调查与力学试验等方式确定各因素得分,采用逻辑运算计算综合评分,进而评判隧道岩体级别;给出模糊层次分析法算法流程,应用于常德-张家界高速公路关口垭隧道(44个试验断面),将评判结果与传统的RMR岩体分级结果进行对比分析。研究结果表明,采用本方法进行岩体分级,43个断面与开挖实际情况吻合,而采用RMR方法仅36个断面接近实际情况;公路隧道岩体质量分级的模糊AHP法克服了传统方法固定评价因素和固定评分方式的缺陷,可以动态地选取评价因素,减少评分的主观性,评价结果更接近工程实际,为隧道、地下工程、边坡等的岩体质量分级研究提供了一种新的思路。A method of rock mass classification in highway tunnel based on fuzzy analytic hierarchy process（AHP） was established. AHP method was used to construct the hierarchy relationship with factors of rock mass and their hierrarchy structures was set up. The weight of every factor was computed based on the positive reciprocal matrix using fuzzy sets method. The evaluation criteria of every factor and rock mass classification were constituted. After all grades were acquired by means of geological investigations and mechanical experiment, the rating of rock mass was calculated according to grading synthetically by iterative logical arithmetic. The arithmetic flow of the method was put forward, and the proposed method was applied to Guankouya tunneling（44 sections） along with Changde--Zhangjiajie Highway in Hunan province. The results show that the determined results are in a good agreement with those of the actual rock mass. 43 sections by the proposed method are accorded with actual sections, but only 36 sections by RMR. The proposed method can overcome the limitation of fixed factors and fixed mode of grading existing in traditional methods, acquire the effect factors dynamically, minimize judgmental bias, provide a quantitative measure of rock mass, and make the result more acceptable to the engineering fact, which offers a new thought to the research of rock mass classification method in such engineering fields as highway tunnelling, slope and underground project.

关 键 词：公路 隧道 岩体质量分级 模糊AHP法 

分 类 号：U452.12[建筑科学—桥梁与隧道工程]