基于模糊数学理论的深基坑施工对邻近既有隧道影响探究

Characterization of the Impact of Adjacent Existing Tunnel Caused by Pit Excavation Based on Fuzzy Mathematics

涉轨深基坑项目风险较大,基坑施工引起邻近隧道变形的影响因素多,常规分析方法和计算理论较为局限。本文从工程角度出发,结合专家打分、多年地下工程安全评估经验和数值模拟结果,探究深基坑施工引起的邻近城市轨道隧道变形规律,从而进行安全风险评定。研究的重点是理清影响要素、制定判定准则,采用模糊层次分析法对基坑开挖引起的隧道变形进行安全风险等级评估,对工程的设计和施工有重要指导意义,也对城市中心区域深基坑施工对隧道结构的影响评价提供了借鉴。

As pit excavation project involves high risks,and the factors leading to the deformation of the neighboring rail transit tunnel are numerous,but the application of conventional analytical methods and computational theory are relatⅣely limited.From the engineering point of view,combined with experts grading method,years of underground engineering assessment experience and computer simulation results,this paper explores the tunnel deformation in the urban areas caused by pit excavation,therefore,the risk assessment can be made more approachable according to the results.The study focuses on the leading factors and rating criteria,and using Fuzzy AHP to analyse the tunnel deformation caused by pit excavation as a safety assessment methodology which is significantly beneficial for design and construction of the projects and provides a design model for the assessment of tunnel structure impacted by pit excavation in the heartland of cities.