模糊综合评判在花岗岩风化层划分中的应用

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英文篇名：Application of granite weathered layer division based on fuzzy comprehensive evaluation 作者：么玉鹏 ; 刘鑫 ; 刘志清 英文作者：YAO Yupeng;LIU Xin;LIU Zhiqing;China Communications Highway Planning and Design Institute Company Limited; 关键词：花岗岩残积土 ; 全风化花岗岩 ; 强风化花岗岩 ; 模糊综合评判 ; 权重 ; 隶属度 ; 标贯击数 英文关键词：granite residual soil;;completely weathered granite;;strongly weathered granite;;fuzzy comprehensive evaluation;;weight;;membership degree;;standard penetration number 中文刊名：FXKY 英文刊名：Journal of Liaoning Technical University(Natural Science) 机构：中交公路规划设计院有限公司; 出版日期：2019-04-15 出版单位：辽宁工程技术大学学报(自然科学版) 年：2019 期：v.38;No.240 基金：中国交建科技研发项目(K18047B、ZB18047B) 语种：中文; 页：FXKY201902004 页数：6 CN：02 ISSN：21-1379/N 分类号：24-29

摘要

针对花岗岩风化层在勘察中难以划分的问题,采用模糊综合评判方法,以质量密度、天然含水率、天然孔隙比、饱和度、压缩系数作为评价指标,实现了花岗岩残积土、全风化花岗岩和强风化花岗岩的定量划分.研究结果表明:全部评价指标中天然含水率和天然孔隙比所占权重最大,分别为0.26和0.25.所选70件样品中,评判为花岗岩残积土的有34件,评判为全风化花岗岩的有26件,评判为砂土状强风化花岗岩的有10件.通过标贯试验进行检验,评判结果与基于标贯击数分类一致的样品有59件,占比84%,表明基于模糊综合评判进行花岗岩风化层划分的方法可行,评判效果良好.隶属度Ⅰ、隶属度Ⅲ与标贯击数具有线性相关性,随标贯击数增大,隶属度Ⅰ减小,隶属度Ⅲ增大.
        Aiming at the difficulty in granite weathering layer quantitative division in investigation, mass density, natural water content, natural void ratio, saturation and compression coefficient used as evaluation indicators, quantitative division of granite residual soil, completely weathered granite and strongly weathered granite were realized by using fuzzy comprehensive evaluation method. The results show that natural moisture content and natural void ratio of the five evaluation indexes account for a relatively large weight, 0.26 and 0.25. Among the 70 samples selected, 34 samples were judged as residual granite soil, and 26 samples were judged as completely weathered granite and 10 samples were judged as sand-like strongly weathered granite. Through the inspection, there were 59 samples whose evaluation results were consistent with their standard penetration numbers and the proportion is 84%. It is shown that the division of granite weathered layer based on fuzzy comprehensive evaluation was feasible and the evaluation results were good. The membership degree Ⅰand Ⅲ are linearly related to the standard penetration numbers, with the increase of standard penetration numbers, membership degree decreases and membership degree increases.

引文

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