被动源面波线形台阵在路基采空区勘查中的应用

Application of linear array of passive source surface wave in exploration of roadbed GOAF

被动源面波勘探又称作微动勘探,以其野外采集布设灵活、抗干扰、环境适应性强等优点,在城市工程勘察中的应用效果越发明显。文章以某地城市道路交通施工前期的采空区勘探工作为例,开展了被动源面波法线性台阵在探测路基下方采空区的应用效果研究,采用Atlas节点地震仪布置线形台阵采集微动数据,利用SWAINS面波处理软件提取微动数据的频散曲线,进而反演地下介质视横波速度剖面。试验结果表明,线形台阵被动源面波法适合于城市道路复杂场地环境下的采空区探测,钻探验证率高。

Passive surface wave exploration,also known as microtremor exploration is widely used in urban engineering with good results due to it's flexible field acquisition and layout,anti-interference and strong environmental adaptability.Passive surface wave linear array exploration is applied in a city road traffic construction engineering to detect GOAF under roadbed and study the exploration effect.Atlas node seismograph is used to lay out the linear array and collect fretting data.The fretting data are processed and the dispersion curve extracted with STAINS software.Then the apparent shear velocity profile of underground medium is inverted.Result of the test exploration show that the linear array passive surface wave method is suitable for detection of GOAF under the complex environment of urban road with high drilling verification rate.