地铁施工灾害关键警兆监测指标研究

Research on Key Monitoring Indicators of Subway Construction Disaster Warning Signs Based on WBS-RBS and Association Rules

为实现地铁施工灾害警兆的实时监测和重点跟踪,预防和减少地铁施工灾害的发生,应用WBS-RBS及关联规则对地铁施工灾害关键警兆监测指标进行科学选取。通过分析以往地铁施工事故,针对基坑工程采用WBS-RBS方法,全面识别施工过程中的风险源,并运用基坑工程警兆监测指标关联规则模型对"地墙渗漏"警兆的20组样本数据进行计算分析,得到警兆与监测指标的频繁项集,从而甄选出关键警兆监测指标。结果表明,由于关联规则的存在,当警兆监测指标组合中某个指标超过阈值时,组合中可能存在其他指标同时超过其指标阈值,因此这时应加强对其他指标的监测。

In order to realize the real-time monitoring of subway construction disaster warning signs and special tracking,then prevent and reduce the occurrence of the subway construction disasters, WBS-RBS and association rules were proposed to select the key monitoring indicators of subway construction disaster warning signs scientifically. Through the analysis of the subway construction accidents in the past, the WBS-RBS was used to look for the excavation engineering common monitoring indicators of warning signs, then an association rules model was used to analyze 20 sample data of the ＂wall seepage＂ warning sign, getting the frequent item sets of warning signs and monitoring indicators, selecting monitoring indicators of the key warning signs. The results show that due to the presence of association rules, when one monitoring indicator in a combination of monitoring indicators of warning signs exceeds the threshold, there may be a combination of other monitoring indicators exceeding the thresholds. In this case, it is necessary to strengthen the monitoring of other indicators in the combination.