Considering the complex and challenging geotechnical conditions, along with the significant overburden of the Murrizi Tunnel, part of the Arbri Road project, it was essential to undertake advanced geotechnical surveys, develop intricate 3D numerical simulations, prepare detailed engineering designs, implement specialized safety measures, and apply modern tunneling techniques throughout the construction process

In this context, an incredibly careful engineering approach was used, like detailed 3D terrain models, and surface reference points were determined to assess surface movements. Surface geodetic measurements were done for a long time and detailed geological model of the area was prepared. Electrical tomography, seismic refraction, and seismic reflection tests were conducted through a grid.

Audible Magnetotellurics (AMT) surveys, utilizing cutting-edge equipment and expertise, were conducted for the first time in Albania. 

To simulate the geomechanical behavior of the site, including its response during seismic events, 3D Finite Element Method (FEM) analyses were carried out. This method, which is typically employed only for large-scale, high-profile projects across Europe, was utilized here for the first time in Albania. 

The Murrizi Tunnel represents the most challenging and impressive engineering feat ever undertaken in the country. Given the tunnel’s exceptional length, the weak and complex geotechnical conditions, significant water inflows, high overburden, tectonic and geological complexities, meteorological challenges, and the limited budget available for such a demanding project, it stands as a truly remarkable achievement. No other tunnel engineering project of this scale and difficulty has been attempted in the country. From this perspective, the Murrizi Tunnel occupies a unique and distinguished place among national engineering projects. Its successful execution is a testament to the specialized expertise of the contracting company involved.