【摘要】 复杂地质条件下的异常体给盾构施工带来极大的隐患,而其独特的地球物理特征构成了探地雷达研究的物性前提。根据实际工程,为探明隧道周边异常体,采用探地雷达中剖面法反射多次覆盖采集方式,并通过滤波处理、增益控制等方法对采集信号进行处理。本文分析并总结了异常体雷达图像的具体特征,表现为相应段反射波同相轴呈曲折、分叉。这些特征有助于判断出异常体的具体位置和规模,对盾构施工能起到积极的指导作用。更多还原

【Abstract】 The complex geological conditions of abnormal body bring huge hidden trouble to the shield construction,and its unique geological and geophysical characteristic is geophysical prerequisite for the GPR research.Based on an actual project,profiles reflected and multiple cover acquisition methods were adopted to collect signals by the GPR in order to detect an abnormal body surrounding the tunnel.Signals collected were processed by filtering processing,gain control.The specific characteristics of their radar images were analyzed in the article,such as the corresponding section of reflection wave with phase axis is tortuous,bifurcate.These characters are helpful for determining the concrete position and scale of an abnormal body and can play a positive role to the shield construction.更多还原