基于监测信息的环境安全性控制技术研究

Study of Surroundings-safety-control Technology Based on Monitoring Information

为了更好的在基坑开挖过程中对周边环境进行监测,从传统的基于监测信息的环境安全性控制流程出发,提出了集超前预测于一体的安全性控制新流程。在新流程图中主要通过时效曲线法和工程类比法来对下一施工阶段周边环境的安全性进行预测。时效曲线法是以已开挖的实测数据为基础,以泊松曲线为预测模型对下一施工阶段的变形量进行预测的方法。工程类比法是根据地质水文条件、支撑方式以及周边环境条件基本相同的工程实测时程曲线或经验公式对本工程的变形进行超前预报的一种方法。以两个工程实例验证了时效曲线法和工程类比法在实际运用中能够提前预测到可能出现的不安全因素,从而有效地采取避免措施,预防安全事故的出现。

In order to monitor the surroundings in the process of foundation-pit excavation, based on traditional surroundings-safety-control flow on monitoring information, new safety-control flow with forcast is coming up. In the new flow, the safety of surroundings in the next construction phase is forcasted mainly by up-to-date curve method and enginerring-analogy method. The up-to-date curve method is a method that is based on monitoring information and use Poisson curve as forcast model while engineering-analogy method forcast the current engineering from some similar conditions of geology and hydrology, supporting-mode and surroundings. The practical meaning of the two methods is validated in two actual engineering that possible unsafety factors can be forcasted and safety accident can be avoided.