注浆加固围岩对公路隧道的减震作用研究

Study on shock absorption of cementing rock for highway tunnel

由于我国公路隧道建设起步较晚,目前公路隧道尚无严重震害例子.但从以往的受震破坏经验来看,在高烈度地震带,地下工程有可能遭受严重震害,注浆加固围岩是改善隧道地震响应的重要途径.采用FLAC3D软件,从土-结构相互作用模型出发,对隧道不同的注浆情况进行了三维数值分析,得到了相应的结论,并对结果进行了分析,指出了注浆加固围岩的减震作用,并提出了相应措施.

There is no severe ruin of highway tunnel under earthquake,for the constructing of Chinese tunnel is late.But from the knowledge of the past,in high earthquake intensity area, underground structure may be fall into ruin for the seismic motion.Cementing rock is an important way to reduce the shock of tunnel.As Based on the soil-structure interaction model, adopting the soft of FLAC3D and numerical analysis method,the tunnel entrance has been computed by the three dimensional way,the results obtained are discussed and the measures for design are presented.