Geotechnics is main key and expertise dealing with uncertainties in underground construction. Apart from structural specialty of the firm, the Technical & Design department of Hexa Consulting Engineers, through a genuine approach concerning
geotechnical concepts has been designing and supervising many underground structures in case of metro stations and urban passages. Tunnelling either as part of roads and railways in large mountains or urban tunnels have been successfully practiced in the firm.
Tunnelling
Tunnels are ancient structures connection with slightest need of surface. Curved underground caverns naturally transfer over-burden stresses and mostly could stand permanently safe in sound and integrated rocky materials, otherwise may require support measures. Hexa as part of its road & railway projects has been designing and supervising tunnels in variety of geotechnical conditions from discontinued rock materials to stiff alluvium.
Tunnelling in urban areas has increasingly become important in populated cities of Iran. Minimizing induced settlements on surface while tunnelling beneath, makes design and practice of tunnel construction much more challenging in urban areas particularly in shallow soft grounds, where finite element modelling of soft soil materials in sequential methods of practice and regarding instrumentations play a vital role.
Hexa has experience in design, supervision and management of NATM soft ground urban tunnelling in one of the largest cities of country (Karaj) as well as some smaller projects. Finite element analysis with the aid of sophisticated computer programmes in tunnelling is well-practiced in this consulting firm providing successful predictions and design.
Deep Excavations
Moreover, Hexa Co. has provided geotechnical and structural consultancies for EPC general contractor of Ahwaz urban railway project in rather difficult geotechnical conditions. For instance, various methods of Cut & Cover and regarding temporary deep excavation supports as well as several Top-Down methods have been designed and monitored for 24 underground stations and 7 crossovers in presence of high water table in permeable strata. Since then, Hexa has been extensively involved in design of deep excavations and nowadays with more than sufficient experience and expertise has become on the leading consultancy firms in this flied.
company news
- Hexa sponsors the first steel bridge competition May 5,2012 18 April 2012
- Project which connect Esfarayen to National railway began April, 2012 17 April 2012
- Minister of roads and urban development visited Parand urban railway (One of Hexa projects) March 27 16 April 2012
- Best wishes for a great new year of hope, peace and joy for all the Iranian 17 March 2012
