软土地区城市深基坑支护方案优选的模糊层次分析法
来源期刊：中南大学学报(自然科学版)2012年第9期
论文作者：周罕 曹平
文章页码：3582 - 3588
关键词：软土地区；城市深基坑；支护方案优选；层次分析法；模糊数学
Key words：soft soil region; city foundation pit; selection of supporting schemes; analytic hierarchy process (AHP); fuzzy mathematics
摘 要：提出软土地区城市深基坑支护方案优选的模糊层次分析法。在对影响软土地区城市深基坑支护方案的各因素进行分析和调查基础上，选取4个一级指标、14个二级指标构建综合评价指标体系；通过层次分析法建立层次关系，构造阶层结构，采用模糊理论建立判断矩阵，确定权重向量；通过专家调查和理论分析等方式确定各因素得分，采用逻辑运算确定相对优属度矩阵，建立模糊综合评判模型，评判备选支护方案的优劣。利用该模型对上海陆家嘴地区某深基坑3个备选支护方案进行比选，得出备选方案的相对优属度分别为0.596，0.283和0.619，从而确定第三方案最优，为实际工程建设提供了决策依据。
Abstract: To select the rational supporting schemes of city foundation pit in soft soil region, a fuzzy analytic hierarchy process (AHP) method for making decision was proposed. Based on the analysis and investigation on factors affecting the supporting schemes of city foundation pit in soft soil region, 4 first grade indexes and 14 second grade indexes were conducted to establish the index system for synthesis evaluating project. The AHP method was used to construct the hierarchy relationship with the influence factors and to set up their hierarchy structures, and then the weight of every influence factors was computed based on the judge matrix fuzzy sets method. After all grades were acquired by means of geological investigations, theoretical analysis and laboratory or field tests, the matrix of the membership comparative degree was calculated by iterative logical arithmetic. A synthetic assessment model was made to estimate the supporting schemes of foundation pit. The results show that the comparative synthetic superior degrees for the supporting scheme of a foundation pit in Shanghai are 0.596, 0.283 and 0.619 respectively according to this method, and the third location becomes the best. The results show distinctly that the fuzzy-AHP method is valid and feasible to select the supporting scheme for city foundation pit in soft soil region.
周罕1, 2，曹平1
(1. 中南大学 资源与安全工程学院，湖南 长沙，410083；
2. 云南铜业(集团)有限公司，云南 昆明，650051)
摘 要：提出软土地区城市深基坑支护方案优选的模糊层次分析法。在对影响软土地区城市深基坑支护方案的各因素进行分析和调查基础上，选取4个一级指标、14个二级指标构建综合评价指标体系；通过层次分析法建立层次关系，构造阶层结构，采用模糊理论建立判断矩阵，确定权重向量；通过专家调查和理论分析等方式确定各因素得分，采用逻辑运算确定相对优属度矩阵，建立模糊综合评判模型，评判备选支护方案的优劣。利用该模型对上海陆家嘴地区某深基坑3个备选支护方案进行比选，得出备选方案的相对优属度分别为0.596，0.283和0.619，从而确定第三方案最优，为实际工程建设提供了决策依据。
关键词：软土地区；城市深基坑；支护方案优选；层次分析法；模糊数学
ZHOU Han1, 2, CAO Ping1
(1. School of Resources and Safety Engineering, Central South University, Changsha 410083, China;
2. Yunnan Copper Group Company Ltd., Kunming 650051, China)
Abstract:To select the rational supporting schemes of city foundation pit in soft soil region, a fuzzy analytic hierarchy process (AHP) method for making decision was proposed. Based on the analysis and investigation on factors affecting the supporting schemes of city foundation pit in soft soil region, 4 first grade indexes and 14 second grade indexes were conducted to establish the index system for synthesis evaluating project. The AHP method was used to construct the hierarchy relationship with the influence factors and to set up their hierarchy structures, and then the weight of every influence factors was computed based on the judge matrix fuzzy sets method. After all grades were acquired by means of geological investigations, theoretical analysis and laboratory or field tests, the matrix of the membership comparative degree was calculated by iterative logical arithmetic. A synthetic assessment model was made to estimate the supporting schemes of foundation pit. The results show that the comparative synthetic superior degrees for the supporting scheme of a foundation pit in Shanghai are 0.596, 0.283 and 0.619 respectively according to this method, and the third location becomes the best. The results show distinctly that the fuzzy-AHP method is valid and feasible to select the supporting scheme for city foundation pit in soft soil region.
Key words:soft soil region; city foundation pit; selection of supporting schemes; analytic hierarchy process (AHP); fuzzy mathematics
