摘要
地铁车站深基坑施工风险多、难度大,施工环境及地质条件复杂多变,必然会引起地下土体诱发基坑坍塌等事故的发生。基于基坑变形监测数据,进行基坑安全施工的全过程研究,探讨基坑的变形规律,分析不同工况下基坑风险演变过程。采用三角模糊数学方法探究风险因素,建立不同预警条件下的风险模糊概率。分析不同监测项目之间的相关性,确定各监测项目的影响权重,依据施工阶段各监测项目的风险概率指标,确定基坑的风险等级。工程实例表明,该方法可为深基坑施工环境风险评价提供科学的依据。
The deep excavation in a complex environment would inevitably cause soil deformations,which will induced underground foundation pit collapse accidents happening by deformation of soil. In this paper,by researching the whole process of foundation pit construction safety based on the deformation monitoring data,discusses the deformation regularity and risk level change in the development of foundation pit. Then,utilizes triangle fuzzy mathematics to establish probability interval and calculates the corresponding fuzzy probability. By means of analyzing the correlation between different monitoring items,confirms the effect weight of every factors. At last,through calculating the risk probability of different construction stages of the monitoring project indicators to analyze the risk of foundation pit level evolution regular. The engineering cases showed that the method was a high accuracy and a good prospect for analyzing the characteristics of construction deformation due to deep excavations.
出处
《武汉轻工大学学报》
2016年第4期52-57,66,共7页
Journal of Wuhan Polytechnic University
基金
住建部科学技术项目计划(2015-K3-04)
武汉轻工大学研究生教育教学改革研究与实践项目(YY2015006)
关键词
基坑工程
施工风险
三角模糊数学
风险评估
deep excavation
construction deformation
triangle fuzzy mathematics
risk assessment
