地铁车站深基坑施工风险识别与评价

发布时间：2018-06-14 23:36

本文选题：基坑工程 + 施工风险　；参考：《土木工程与管理学报》2017年05期

【摘要】：软土地区的地铁车站深基坑工程因其施工环境复杂,施工风险大,施工风险因素之间的耦合作用,致使深基坑施工的主要风险难以确定,导致施工事故频发。本文基于深基坑工程类似施工风险经验,识别风险因素,按照工作分解结构分解方法,建立风险清单。采用层次分析法和专家调查法,分析深基坑施工风险因素的重要性及其主要风险,估计风险发生概率与风险损失。采用梯形隶属函数计算风险事件的隶属度,运用模糊综合评价法进行风险评估,确定施工的风险等级。通过对厦门某地铁车站深基坑工程施工风险进行实证研究,确定其施工总体风险等级为三级,属于风险可控制的范围,评价结果能反映实际施工风险情况。针对基坑施工中的风险评估结果,本文提出相对施工措施,为深基坑工程施工风险防控提供了依据。
[Abstract]:Because of its complex construction environment, large construction risk and coupling effect between construction risk factors, it is difficult to determine the main risk of deep foundation pit construction in soft soil area, which leads to frequent construction accidents. Based on the similar construction risk experience of deep foundation pit engineering, the risk factors are identified and the risk list is established according to the decomposition method of work decomposed structure. The importance and main risk of risk factors in deep foundation pit construction are analyzed by means of analytic hierarchy process (AHP) and expert investigation, and the probability of risk occurrence and risk loss are estimated. The membership degree of risk events is calculated by trapezoidal membership function, and the risk grade of construction is determined by fuzzy comprehensive evaluation method. Through the empirical study on the construction risk of the deep foundation pit project of a subway station in Xiamen, the overall construction risk grade is determined to be three levels, which belongs to the scope of risk control, and the evaluation results can reflect the actual construction risk situation. In view of the risk assessment results in foundation pit construction, this paper puts forward the relative construction measures, which provides the basis for risk prevention and control in deep foundation pit construction.
【作者单位】：武汉轻工大学土木工程与建筑学院;中国科学院武汉岩土力学研究所;
【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)
【分类号】：TU753

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