Imam reza tunnel stability analysis in the Ardabil - sarcham Road by using software plaxis

Geological structures, tensions status, groundwater conditions, the force of gravity and geodynamic processes function alone or jointly could have a negative impact Brsaz·h engineering or development projects Therefore, due to geological and tectonic conditions in different areas should not expect the same methods and solutions are presented and their application are identical or leads to a result. For this reason, methods of analysis and prediction systems supporting tunnel design in a variety of different perspectives. To design a tunnel geological and geotechnical need to be aware of it So that the observations and the results of these surveys and using methods and classification systems to be stabilizing. Using tunnel boring holes and blasting operations carried out in two stages. The first phase includes the design and implementation of the original structure with a height of 5.5 meters in the upper and lower sections in the shape of a semicircle and second stage drilling rectangular cross-section to a height of 3 meters and a width of 7/34 implementation and will then stabilize At each stage in the stabilization according to the characteristics and the amount of pressure on the roof and the sides of the tunnels were tested components and materials used in the laboratory And then according to the results of stabilization measures for Grft.khakhay the tunnel of fine-grained (silt and clay) is. Most of the soils in the early parts of the tunnel and the tunnel is listened to. . For physical and mechanical tests were carried tunnels that their results are as follows: compressive strength of 400 to 500 kilograms per square centimeter on average in limited elasticity in rocks Mybashd.mdvl between 12 to 13 GPa Poisson Darnd.zryb with an average of 0/35 Mybashd.zryb adhesion (C) in the range of 4 to 5.5 MPa and internal friction angle (φ) are between 60 and 50 degrees.