Ayson Geoteknik ve Deniz İnşaat A.Ş.

Ayson's fields of activity comprises all types of bored & precast concrete piles, prefabricated vertical drains (wick drains), sand drains, jet grout columns, stone columns, impervious walls, retaining walls, pre-stressed anchoring with steel strands, sheet piling, bolting, soil nails, grouting works, shotcreting, exploratory drilling, water wells drilling, drainage wells, foundation explorations, soil improvement works, deep excavation supporting systems, ventilation shafts, excavation works including preliminary studies of all these works and evaluation of the "in-situ" tests.

Ayson also offers wide range of services in marine structures, jetties, dolphins, ferry terminal ramps and breakwaters. Recently, the Company has added "Viaduct Construction" to its fields of activity. Ayson has successfully completed more than 41,700 tons of grouting, 1,100,000 m of bored piles and 480,000 m of anchoring works in the projects that it has undertaken.

Ayson has currently undertaken four projects in Turkey and overseas: within the scope of the Boyabat Dam and HEPP, which is being constructed as a concrete dam on the Kızılırmak river by Doğuş Construction, Ayson has executed downstream cofferdam injection works in total of 850 m3 with total drilling length of 10,500 m. Currently Ayson is also constructing the injection gallery tunnels, which is 2,625 metres in total, in the same project. The injection works in these tunnels has been undertaken as well and will be executed in compliance with the progress of the tunnel construction.

In Bulgaria, Ayson executes the diaphragm wall construction, prestressed anchor construction, bored pile construction and other relevant geotechnical works of the 4 metro stations of Sofia Metro Extension Project LOT 1 Section with the length of 3,8 km and will execute the geotechnical investigation works in the Metro route.

In Ukraine, Ayson serves as a geotechnical supervisor for the geotechnical works of Kiev Boryspil State International Airport Project which comprises 25,000 m bored pile construction, 12,600 m driven pile construction, static axial compressive and lateral load tests, high-strain integrity tests and dynamic tests.

Ayson has established an integrated management system comprising Quality, Occupational Health and Safety and Environmental Management Systems in 2009 and achieved certificates from LRQA (Lyod's Register). Management systems are established on the basis of ISO 9001:2008, ISO 14001:2004 and OHSAS 18001:2007 standards.

Managed by the highly qualified technical staff with 35 years of experience, and its "do it once, do it perfect" motto, Ayson has attracted high praise from local and foreign employers and consultants for the quality of the works it performs in its entire field of activities.