Soil nailing method is one of the common methods in stabilize temporary and permanent, and
maintenance of earthen walls ,chalky limestones and crushed stones .
The implementation of this method is in stages , and up to down.
Each stage of operation includes:
A: Deep drilling to sustainable depth(1_2 m).
B:Spudding with length , diagonal , gradient, and specified spacing.
C: Installation of reinforcement, and cement grout.
D: Installing composite strips for special drainage on face.
E: Welded net,implementation of shotcerete,installing anchor plate on reinforcement spot.
Poor and problematic conditions for soil nailing method are: Dry and lack of adhesion soil, high subsoil water,soil rubble,ductile fine grained soil,organic soil,weathered rock,long cold and,loose granular soil.
In this situation ,design and construction costs of them will be more than normal situation.
Utilizations:
_Inhibition of cliff due to، while road constructing.
_Inhibition of cliff temporary or permanent drilling in metropolitan areas.
_The widening of the under bridge's roads.
_Stabilization of natural slopes.
_Stabilization of engineering levee.
Benefits:
_Doesn't occupy space on building-right-of-way and deep floor.
_Feasibility according to various geometric patterns.
_Option to keep cliff from top to foot ,and along with the excavation.
_High safety due to the large number of soil nails ,and possibility of increasing them in required areas.
_Arranging and relocating soil nails when dealing with abstracts.
_No need to structural elements earth wall holder.
_Using small equipments for the installation of soil nails specially in different crossing points.
