Client: NATIONAL COMPANY "STRATEGIC INFRASTRUCTURE PROJECTS"
Architecture: PARTERSHIP COMPANY "VIA PLAN - AMBERG" SOFIA
Main contractor: CONSORTIUM "STRUMA - LOT 3.3"
Design: Structures
Main structural material: cast in place reinforced concrete
UNDERPASS 1 - at km. 400+220
Characteristics: - non retaining open excavation with slopes;
- single span rigid box-type frame;
- clear span distance - 9 m;
- clear height of structure - 6 m;
- 2 equal blocks, separated by expansion joint;
- total length of the facility - 30,3 m;
- highway traffic above the roof slab;
- trapezoidal retaining walls at both ends of the facility;
UNDERPASS 2 - at km. 402+140
Characteristics: - non retaining open excavation with slopes;
- single span rigid box-type frame;
- clear span distance - 9 m;
- clear height of structure - 6,3 m;
- 2 different blocks, separated by expansion joint;
- total length of the facility - 36,6 m;
- highway traffic above the roof slab;
- trapezoidal retaining walls at both ends of the facility;
UNDERPASS 3 - at km. 404+474
Characteristics: - non retaining open excavation with slopes;
- single span rigid box-type frame;
- clear span distance - 9 m;
- clear height of structure - 6,7 m;
- 2 equal blocks, separated by expansion joint;
- total length of the facility - 30,3 m;
- highway traffic above the roof slab;
- trapezoidal retaining walls at both ends of the facility;
UNDERPASS 4 - at km. 406+125
Characteristics: - non retaining open excavation with slopes;
- single span rigid box-type frame;
- clear span distance - 9 m;
- clear height of structure - 6,3 m;
- 2 equal blocks, separated by expansion joint;
- total length of the facility - 36,7 m;
- highway traffic above the roof slab;
- trapezoidal retaining walls at both ends of the facility;
CANTILEVER WALLS from km. 412+840 to km. 413+051
Characteristics: - 6 different types with various lengths and heights;
- horizontal footings with inclined stems;
- angle of inclination toward the back fill - 20÷30˚;
- flat and smooth front face;
- stepped variation in heights of different types of walls;
- waterproof expansion joints at every 20 m;
Phase/stage: under construction
   
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