PACKING AND-GROUTING TECHNIQUE FOR TAIYU LOESS TUNNEL OF XI’AN-LANZHOU HIGHWAY

After the lining of loess tunnel,the backfill bensity is poorer,with more pores and more potential hidden danger. Taking the Taiyu loess tunnel as an example,the practical packing-and-grouting experience is introduced.The quality check indicated that the packed,reinforced and water-sealed effectivenesses are attained by the grouting.