基于德尔菲法和优序图法的深基坑支护方案优选

摘要

一种合适的深基坑支护方案可以在很大程度上保证工程安全,同时节省施工成本.采用德尔菲法和优序图法相结合的方式,对某深基坑支护方案进行优选,利用Abaqus有限元软件对优选后的支护方案进行支护模拟.运用德尔菲函询法,选取对工程所在地区情况熟悉的一些专家,对深基坑开挖过程中各项影响因素的相对重要程度进行评估,得出这些影响因素在方案中的评分,再用优序图法对其进行权重分析,从已有的深基坑支护方案中选择相对最优方案.对优选后的深基坑支护方案结合工程实例建立相关的模型,运用Abaqus有限元软件对该工程实例进行模拟并与实际情况进行对比分析,表明德尔菲优序图法具有科学性、实用性与可靠性.%A good deep foundation pit support scheme can ensure project safety to a large extent while saving construction costs.By combining the Delphi method and the precedence diagram method,the existing deep foundation pit support scheme is optimized,and the optimized support scheme is simulated by Abaqus finite element software.By Delphi correspondence method,several experts familiar with the situation in the project area evaluate the relative importance of the influencing factors in the excavation process of the deep foundation pit,and the scores of these influencing factors in the scheme are obtained.And weight analysis is carried out by precedence diagram method,and the relative optimal scheme is selected from the existing deep foundation pit support scheme.The model is established by combining Abaqus finite element software to simulate the engineering examples and compare with the actual situation.It shows that the Delphi method combined with precedence diagram method is scientific and practical with good reliability.