深基坑工程风险评价分析

Study On Risk Evaluation of Deep Foundation Excavation Project

随着基坑的开挖深度和规模的增大,深基坑工程的风险问题也更加突出。对深基坑工程项目进行全面而科学的评价,了解深基坑工程的风险水平,是进行深基坑工程风险控制管理工作的必要前提,因此具有十分重要的意义和必要性。从全过程角度出发,首先分析深基坑工程风险影响因素,通过专家打分法对深基坑工程项目风险事件发生概率、损失大小及各影响因素权重进行打分评价。将风险计算值带入风险隶属度函数,得到评判矩阵,评判矩阵与影响因素权重向量进行模糊运算,可得到风险等级隶属度向量,以此来分析该深基坑工程的风险等级水平。管理者可以根据给出的风险接受准则对不同等级的风险采取相应的措施来降低风险、减少潜在的损失。

With the increase of excavation depth and scale,The risk of deep foundation excavation is more prominent.Comprehensive and scientific evaluation of deep foundation excavation projects and understand the risk level of deep foundation excavation engineering is a prerequisite for risk control and management of deep foundation excavation project. Therefore,it is of great significance and necessity. From the point of view of the whole process,First of all,the risk factors of deep foundation excavation engineering are analyzed. Then through expert scoring method for deep foundation excavation project risk event probability,loss size and the weight of each impact factor scoring evaluation. Take the risk calculation value into the risk membership function,and get the judgment matrix,the judgment matrix and the weight vec-tor of the influence factors are carried out fuzzy operation. Risk grade membership vector can be obtained,which can be used to analyze the overall risk level of the deep foundation excavation project. Managers can reduce risk and reduce losses by taking corresponding measures to different levels of risk according to the risk acceptance standards given.