PROJECT OVERVIEW
PROJECT OVERVIEW
The road connecting Kırşehir city center to TEM highway and Ankara-Antalya route passes through a 600 m section of Kızılırmak River on the tailwater section of the Hirfanlı Dam Reservoir and has a water depth of 6-9 m.
PROJECT DETAILS
- Proje Adı Sarıyahşi State Highway Ground Improvement and Road Construction Between KM:7+380 - 14+172
- Firma STY İnşaat Tur. Tic. ve San. Ltd. Şti.
- Konum Sarıyahşi / KIRŞEHİR
- Yıl 2012 - 2015
As a result of the ground studies conducted in the area, it was determined that the riverbed composed of very weak, 8-20 m thick soft clay and could not respond to the embankment loads both in terms of bearing capacity and expected settlements.
In parallel with the soil improvement project carried out by Geoduvar, one of the group companies, the weak soil was reinforced with the geotextile encased column system. The embankment loads exceeding 20 m were transferred to the ground reinforced with geosynthetic reinforced load distribution and supporting platform constructed underwater.
While eliminating the risk of liquefaction by using geotextile encased columns and support systems with high-strength base reinforcement, expected settlements were reduced by 90% and a flexible and energy-absorbing engineering solution was created that is much safer compared to rigid systems in case of an earthquake. Atlasyol successfully completed 160.000 lm of underwater geotextile encased column installation using modular vessels that can operate on the lake, all of which belong to Atlasyol and manufactured specifically for this project. The geosynthetic reinforcement layers were installed underwater by a team of divers who are members of the company’s permanent staff and constructed the road embankment.
In order to allow the passage of fish through the embankment and to minimize the environmental effects, two steel culverts were placed a the archeological Kızılırmak River flow point, thus preventing any negative effect on nature and the habitat by the project.
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