Abstract:  Due to inappropriate soil and shallow tunneling in urban area, tunnel excavation will face difficulties which one of the mostimportant issues is the settlement phenomenon and surface structures damage. Also, when establishing the ground strengthening system and  lining  immediately  after  the  tunnel  excavation  are  not  possible,  ground  presupporting  is  usually  needed  to  be  implemented  during  tunnel  excavation. Furthermore, due to the flexibility of the New Austrian Tunneling Method (NATM), today, this method is widely replaced by the traditional tunneling. The methods of presupporting consists of ground jet grouting, Umbrella Arch Methods (UAM), pipe roof method, freezing and … which each of them can be applied depending on the tunnel geometric  and  ground  mechanical  properties.  In  this  paper  by  using  the  profile  of Steinhaldenfeld  tunnel  and  following  the  previous  studies  we  had  covered  the numerical  modeling  of  three  ground  pre-supporting  methods,  including  grouting,  jet grouting and pipe roof. Each pre-supporting method has parameters which we made the  models  based  on  different  parameters  and  the  ground  settlement  profile  has obtained  after  the  modeling,  and  the  control  degree  of  each  method  on  the  ground settlement has been assessed. In order to model the structure, finite element modeling with  plane  strain  conditions  has  been  applied.  According  to  the results,  all  three methods  are  significantly  effective  in  reducing  the  ground  settlement  level,  and  the magnitude of the settlement reduction will be increased by improving the geometrical and mechanical parameters of grouting such as jet grouting diameter or thickness and elasticity  module  of  grouting  materials,  By  comparing  the  ground  settlement magnitude situated on top of thetunnel crown, it is perceived that the grouting method with  approximately  4  meter  thickness  around  the  tunnel,  according  to  its  simple implementation,  can  be  more  successful  than  the  other  methods  in  controlling settlement and it is proposed as the efficient method.

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