Chief designer: Duško Bobera dipl.inž.građ.

Bridge and connection road are placed approximately 1km from south entrance in city of Kolašin. Road connects main road M-9 Kolašin-Mateševo and Adriatic road M-2 Podgorica-Bijelo Polje.

Road begins with 300m long and 11m high embankment, continues with 99.5m long bridge after which follows connection to Adriatic road M-2. Total length of the road is 441.66m. It is two way road with one traffic lane 3.25m wide and one marginal strip 0.30m wide in each direction. On both sides sidewalks (1.5m) and shoulders (0.5m) were designed. Total cross section width of road is 11.10m.

Bridge is structure made of prestressed and reinforced concrete with spans L= 33.03 + 34.49 + 33.00 = 99.51m. Main girder cross section consists of prefabricated prestressed T-girders 1.8m high which are joined with slab of reinforced concrete cast in-situ. Minimal thickness of concrete slab is 20cm. Above piers and abutments, pre-cast T-girders, slab and cross girders are joined in monolith structure. Space between pre-cast T-girders is 2cm which allows concreting the slab without trapped formwork.

Chief designer: Duško Bobera dipl.inž.građ.

Viaduct is located on the section Ub-Lajkovac of highway E-763 Belgrade-Požega and overpasses railway Belgrade-Bar, main road M4 Valjevo-Lajkovac and Lajkovac bypass. This section of highway is in horizontal curve with radius R=1500m, vertical grade is constant 2% and cross grade is 5%.

Main girder is continuous, pre stressed box girder with constant height of 2.50m. Total length of viaduct is 25.0 + 11 x 32.0 + 25.0 = 402.0 m. Piers are rectangular with dimensions 1.20x6.00m funded on piles with diameter of 150cm.

Main girder is built with incremental launching method. Launching of main girder is performed with hydraulic presses over previously built piers. Incremental launching method allows building the superstructure in segments which are placed in the same place. After prestressing the segment is launched with hydraulic presses in new position. In that way the formwork is released for new segment.

In order to enable building the structure with incremental launching method it was necessary to correct vertical alignment of the highway at length of 1475m. Namely, for this method of building, if structure is in horizontal curve the vertical alignment must be in constant grade.

Chief designer: Duško Bobera dipl.inž.građ.

Bypass with bridge 631.54m in length crosses over river Topčiderka, double track railway Belgrade-Niš, one track railway Belgrade-Ostružnica and future railway station Kijevo. Till km 587+828 bridge is in straight line and after that in horizontal curve with radius R=4000m. Vertical alignment is in constant grade of 1.6% toward tunnel Straževica. Cross grade of 2.5% is constant at whole bridge.

Cross section consists of two driving lanes, one emergency lane, two marginal strips, New Jersey fence on both sides and service catwalk. It's total width is 14.25m.

Main girder is continuous, pre stressed concrete box girder with constant height of 2.50m which is pre stressed in phases “span by span”.

Movable MSS ferry is used to build main girder with method named “span by span”. In first phase of concreting length of segment is 51.85m. Length of the segment in last phase is 33.85m. Both of segments are built on classic ferry. The length of all segments between first and last is 45m (typical span) and they are built on MSS ferry one span at the time. This method provide easy way to build structure on high piers. Structure built by concreting in-situ with respecting design requirements for achieving durability and with timely maintenance will have the service life at least 100 years.

Chief designer: Goran Tadić dipl.inž.građ.

Bridge over Lim river in city of Priboj connects residential area with factory FAP. Vertical alignment grade on bridge section is 1.5%. Cross section has two traffic lanes 2.5m wide and two pedestrian sidewalks 1.5m wide. Pavement is in crowned cross grade of 1.5%.

In first phase pre casted girders are series of simply supported beams made of pre stressed concrete with spans 23.5m and 28.2m. In final phase, after concreting cross girders and top slab, structure becomes continuous frame with spans L= 24,0 + 29,0 + 24,0 = 77,0 m. Main girder cross section consists of prefabricated prestressed T-girders 1.6m high which are joined with slab of reinforced concrete cast in-situ. Minimal thickness of concrete slab is 20cm. Slab over T-girders and cross girders are concreted at the same time and joined with reinforcement to form a continuous frame beam. Space between T-girders is 2cm which allows concreting the slab without trapped formwork.

Foundation of old bridge piers is on caissons. Additional footings of new bridge are embedded in diabase or porphyry rock. Upstream and downstream surface of the foundation is rounded to ensure smooth water flow of the river. Undermining is prevented by existing caissons and with leveling river bed with crushed stone.

Piers are extended along short side with U-shape frame made of reinforced concrete. Pier extensions are rounded on the end to ensure smooth water flow of the river.

Chief designer: Duško Bobera dipl.inž.građ.

Bridge crosses over river Lim and connects numerous settlements on right riverside with Bijelo Polje and it is part of future bypass around the city. After completion of bridge and bypass all transit traffic from main road Bijelo Polje – Prijepolje will be redirected through there.

Road horizontal alignment at bridge section consists of two transitional curves joined with straight line. Cross grade at the beginning of the bridge is 2.50% while at the end this cross grade is -5.00%. Vertical alignment on this section is in constant grade of 0.63%.

Main girder is continuous, prestressed, reinforced box girder with spans 35.0+70.0+35.0=140.0m. Height of the box at the mid-span of the bridge is 2.00m and over piles this height is 4.00m. Cantilevers on the box are 2.4m n length.

Supporting construction of the bridge consists of two abutments and two piers on shallow foundations. Piers are hydraulically shaped because they are placed in riverbed.

Main girder is built on scaffold. Concreting is performed from both sides of the bridge, simultaneously, in phases.

Chief designer: Duško Bobera dipl.inž.građ.

Viaduct Zlatibor is placed on the main road M-21, on section Borova Glava – Uvac. With its construction very sharp and dangerous horizontal curve will be straightened and road width will be corrected. Viaduct crosses over deep valley whose depth goes up to 35m.

For the first time in Serbia, main girder is built with incremental launching method. This method is very widespread in the world and is used for building long, continuous, prestressed and reinforced bridges with spans up to 60m and the total length of 3000m. Launching of main girder is performed with hydraulic presses over previously built piers. Incremental launching method allows building the superstructure in segments which are placed in the same place. After prestressing the segment is launched with hydraulic presses in new position. In that way the formwork is released for new segment.

Horizontal alignment on viaduct section is straight line, vertical alignment is in constant grade of 5.97% and cross slope is 2.5%. Total width of the cross section is 9.40m.

Bridge spans are 26.50 + 4 x 33.00 + 26.50 = 185.00m. Main girder is prestressed continuous beam. Cross section of main girder is box with constant height of 2.5m with slant webs. Piers have I cross section with dimensions 3.0 x 4.0m and web thickness of 30cm.

Chief designer: Duško Bobera dipl.inž.građ.

Bridge over Lim river connects settlement named Strojtanica with industrial area of Bijelo Polje. It is designed for pedestrian, emergency and utility vehicle traffic, and therefore has only one traffic lane 3.00m wide. Beside traffic lane, cross section consists of sidewalk 1.00m wide and revision path 0.75m wide on opposite sides which gives total width of 4.75m.

Bridge is in straight line with constant vertical grade of 2.00%. At the end toward Strojtanica bridge is with wing adjusted to horizontal curve which allows traffic of emergency and utility vehicles. Cross slope on the bridge is 2.5%

Bridge is prestressed and reinforced monolith construction. Main girder cross section consists of 3 prefabricated prestressed T-girders 1.6m high which are joined with slab of reinforced concrete cast in-situ. Minimal thickness of concrete slab is 20cm. Over piers and abutments slab and T-girders are joined with cross girders cast in-situ. Space between T-girders is 2cm which allows concreting the slab without trapped formwork. Main girder spans are 2x35m=70m.

Main girder is supported with two abutments and one pier in riverbed. Abutments are rectangular in base with dimensions 1.60x4.23m. Pier is circular with diameter of 1.5m on piles foundation.

Chief designer: Goran Tadić dipl.inž.građ.

Both overpasses crossing over highway E-765 at an angle of 83 degrees. Their function is to link the semi-direct and indirect ramp of Lajkovac junction with tollgate.

Horizontal alignment at overpasses section is in horizontal curve (R=180m) and in transition curve (A=130m). Vertical alignment consists of two tangent grades (i=4%) joined with crest curve (Rv=1500m). Cross slope goes from 6% in horizontal curve to 3.7% in transition curve.

Total cross section width is 15.64m and consists of four traffic lanes 2.75m wide, two edge beams with safety barrier included 1.32m wide and median 2.00m wide. Overpass is reinforced and prestressed integral construction which is built with scaffold, formwork and concrete casted in-situ. This method allows much easier way of building bridge with complicated geometry. The superstructure and sub-structure are made monolithic. On that way expansion joints and bearings, very expensive elements subjected to decay, were eliminated.

Main girders are continuous prestressed beams 90cm thick with spans 16,0 + 2 x 20,0 + 16,0 = 72,0 m left and 17,55 + 21,00 + 20,00 + 16,00 = 74,55m right.

Sub-structure is made of two abutments and three piers on pile foundations. Each foundation has four piles Ø120 cm, 13-17m in length. Monolithic connection between piles and piers is made with pile cap.

Chief designer: Duško Bobera dipl.inž.građ.

Overpass crossing over Belgrade-Bar railway, M4 Valjevo-Lajkovac main road and local road. Intersection angle between overpass and railway is 30 degrees.

Horizontal alignment at overpass section is straight line except on the last span where it becomes a horizontal curve with radii 2000m. Vertical alignment is crest curve with radii of 3500m. Cross slope is 2.5%.

Main girder is continuous beam with 8 spans (43m longest). Cross section is a box with constant height of 2.8m. Total overpass length is 25.0 + 3 x 33.0 + 2 x 43.0 + 33.0 + 25.0 m = 268.0m. Piers have rectangular cross section 1.20m wide and 6.00m long. Overpass foundation is made of piles 150cm and 120cm in diameter and 18 to 22m long. Connection between piers and piles is made with pile cap 1.5m in height.

Cross section width is 22.0m and consists of two traffic lanes 3.5m in width, two marginal strips 0.5m in width and two revision paths 2.0m in width with safety barrier and pedestrian fence included.

Main girder is built in segments at same place. After prestressing the segment is launched with hydraulic presses in new position. In that way the formwork is released for new segment. This technology is called incremental launching.

Chief designer: Radivoje Mileusnić dipl.inž.građ.

Design subject is Coastal road from km 0+000 to km 247+092 from Misratah to Sirt. First 51.4km is designed with roundabout intersections in one level and other 189.7km with two level interchanges. There are two settlements between Misratah and Sirt. First is Gioda at km 24+000. Second is Abu Qurayn at km 107+000.

Design speed is 120km/h

Highway out colony is designed with 3 traffic lanes 3.75 in width, one emergency lane 3.00m in width and two marginal strips 0.50m width for each direction. Median goes from 4m to 19m.

Highway in colony is designed with two traffic lanes 3.75m in width, one emergency lane 3.00m in width and two marginal strips 0.50m width for each direction. Median goes from 4m to 10m. Beside that, in colony, two pedestrian paths 2.0m in width and one service road 6.0m in width on each highway side is designed.

Intersections with highway are designed like trumpet, partial cloverleaf and U-turn junctions. On first highway section roundabouts with external radii from 45m to 50m are designed.

Chief designer: Duško Bobera dipl.inž.građ.

393.5km long highway connects two coastal settlements, Sirth and Ajdabiya. Design includes reconstruction and widening of existing two lane road and designing of two new traffic lanes. On that way existing road becomes highway. New horizontal alignment goes parallel to existing road at distance of 5.0m from its edge. Highway is divided on four about 100km long sections.

Existing road widening demands construction of 17 new bridges which are parallel to existing. Due to terrain configuration all bridges are on first two section.

Cross section at the bridge consists of two traffic lanes 3.75m in width, emergency lane 2.50m in width, two marginal strips 0.50m in width two revision path 2.0m in width.

Bridges with spans longer than 15m are designed like prefabricated prestressed T-girders joined together with top slab of reinforced concrete and cross girders. Other bridges are designed like reinforced rigid-frame.

Bridge 3 spans are 8.30 + 2x8.75 + 8.30 = 42.85m. Bridge 6 spans are 17.4 + 7x18.1 + 17.4 = 162.50m.

Span lengths of other bridges are: 36m for bridges 2 and 10; 21m for bridges 9, 11, 12; 10.9m for bridges 7, 8, 14 and 15; 9.85m for bridge 4; 8.95m for bridge 5 and 6.6m for bridges 13, 16 and 17.

Chief designer: Duško Bobera dipl.inž.građ.

Design subject is reconstruction and widening of existing two lane road. On that way existing road becomes highway. New horizontal alignment goes parallel to existing road at distance of 5.0m from its edge.

Design speed is 120km/h.

The 330.55m long road which passes through gradually hilly area is divided on three about 100km long sections. All five bridges, placed on first section, are parallel to existing

Cross section at the bridge consists of two traffic lanes 3.75m in width, emergency lane 2.50m in width, two marginal strips 0.50m in width two revision path 2.0m in width.

All bridges are designed like prefabricated prestressed T-girders joined together with top slab of reinforced concrete and cross girders cast in-situ.

Bridge spans are

Bridge 1: 16.51 + 16.30 + 16.51 = 33.4m,

Bridge 2: 2x22.5 = 45.0m,

Bridge 3: 5x15.88 = 79.4m,

Bridge 4: 33.4m,

Bridge 5: 16.42m.

Chief designer: Radivoje Mileusnić dipl.inž.građ.

Subject of this project is the improvement of existing road which is reflected in widening of existing road into three lanes and emergency lane per direction. Existing road consist of one traffic lane in each direction. Required new road should implicit three lanes per direction, emergency lane, service road, traffic separation island (median) and sidewalks.

Starting point is at the existing Trumpet interchange (Eastern Ring Road to Gaud Al Ruman). Final point is at km 2+020.36 of the street 2 in high-density populated area near the coastal road. Total length of designed street Al Hadaba Al Khadra-Gaser Ben Ghashir is 12.0 km.

Design speed is 100km/h. Horizontal curves radii goes from R=600.00m to R=5000.00m. Vertical alignment is at existing pavement level. Vertical grades are small, about zero, due to the flat nature of the area. New pavement cross grade is identical to existing pavement cross grade and goes from 2.0% in straight to 5.0% in horizontal curve.

For each direction highway cross section consists of three traffic lanes 3.75m in width, emergency lane 3.00m in width, two sidewalks 3.00m in width, two marginal strips 0.50m in width, service road 8.5m in width and shoulder 0.50m in width. Median width is 5.00m which gives total roadway width of 64.5m.

Chief designer: Radivoje Mileusnić dipl.inž.građ.

Subject of this project is reconstruction of existing road which is reflected in widening of existing road into two traffic lanes in each direction. Existing road consist of one traffic lane in each direction.

For each direction street cross section consists of two traffic lanes 3.75m in width, two marginal strips 0.50m in width, green area 2.00m in width, sidewalk 3.00m in width and shoulder 1.50m in width. Median width is 5.00m which gives total roadway width of 35m.

Existing road stretches from Al Thalajat Bridge (second ring road) to Tripoli Fair. Total road length is 5.4km.

Design speed is 100km/h. Horizontal radii goes from R=450m to R=5500m. Longitudinal grades are between 0.1-2.8%, minimum radius of sag curve is Rv=6500m and for crest curve that radius is Rv=8500m. Cross grades are between 2-7%.

Three roundabouts with inner radii of 20m are part of the road design.

Chief designer: Duško Bobera dipl.inž.građ.

Subject of this design is extension of existing culverts. Culverts are box and pipe with different dimensions and types.

Reason for culvert extension is reconstruction of existing road with two traffic lane and it’s widening on four lane highway with 5m width median. Traffic lane width is 3.75m, marginal strips are 0.5m in width while shoulders are 1.5m to 3.0m in width.

Longitudinal and horizontal alignments are parallel with existing road. Design speed is 120km/h.

On AL HISHAH - AL JUFRAH section 330 box culverts sorted in 9 types and 153 pipe culverts sorted in 7 types were designed.

On SIRT - AL JUFRAH section 56 box culverts sorted in 8 types and 183 pipe culverts sorted in 5 types were designed.

On SIRT - AJDABYA section 18 box culverts sorted in 4 types and 33 pipe culverts sorted in 9 types were designed.

On AL JUFRAH - SABHA section 52 box culverts sorted in 14 types and 103 pipe culverts sorted in 3 types were designed.