隧道洞口的施工风险云模型评价方法研究

STUDY ON CLOUD MODEL EVALUATION METHOD OF CONSTRUCTION RISK ASSESSMENT OF TUNNEL ENTRANCE SECTION

通过收集隧道洞口段施工风险资料,研究影响洞口段稳定性的3类因素,且将其细分为11个影响因子。并将施工风险划分为4个级别,构建施工风险指标权重体系,采用云发生器云化特征值,建立施工风险评价方法。结果表明:根据综合评价云图,90%的工程云滴位于中风险区,少部分位于高风险区,说明洞口段施工存在边坡及围岩失稳风险。

Collected instability disaster data during the construction of tunnel entrance section.Three factors affecting the stability at the entrance were concluded,which are subdivided into 11 factors,and the construction risk at the entrance was divided into 4 levels.The risk evaluation index weight system was constructed,and the index parameters were standardized by the cloud generator.The construction risk assessment model was established.The results show that in the comprehensive evaluation cloud image,90%of the actual engineering cloud droplets are located in the medium risk area,and a small part is located in the high risk area,which indicates that there are slope and surrounding rock instability risks in the construction of the entrance section.