微震监测技术在公路高边坡稳定性中的应用

Application of microseismic monitoring technique on high rock slope stability of highway

依托实际工程简要介绍微震监测技术基本原理及微震监测系统的组成和现场监测点布设情况。首先,采用数值计算方法对边坡的施工全过程进行稳定性动态分析,确定潜在失稳边坡的关键点和危险区域,为监测点的布设提供依据。其次,运用微震监测系统对边坡开挖过程中的微震活动性进行实时监测,研究微震事件随着边坡开挖在时空上的分布规律。并对土质边坡和土石过渡部位增加传统测斜监测,与微震监测数据相互补充分析。研究结果表明:微震监测技术可对公路高边坡失稳进行有效预测,对边坡开挖过程进行有效监控,为边坡提前加固提供依据。

Based on the actual engineering,we briefly introduced the basic principle of the microseismic monitoring technique,the components and structure of the microseismic monitoring system and the site monitoring point layout.Firstly,the dynamic stability analysis of the whole process of the slope construction is carried out by using the numerical calculation method,and the key points and dangerous areas of the potential unstable slopes are determined,which provides the basis for the layout of monitoring points.Secondly,application of microseismic monitoring system for real-time monitoring of the seismic activity in the process of slope excavation,the distribution of microseismic events with the slope excavation in the time and space was studied.And the traditional clinometers monitoring was added in soil slope and earth-rock transition area,the data complement each other with microseismic monitoring data to analysis.The results show that the microseismic monitoring technique can effectively predict the highway high slope instability,effectively monitor the slope excavation process,and provide the basis for slope reinforcement in advance.