Low-rise buildings and transport facilities selection

2014

METROSTATION “BUSINESS PARK SOFIA”

METRO – SOFIA I-ST LINE; METROSTATION “BUSINESS PARK SOFIA” (MS I-16), CLIENT: "METROPOLITAN" Plc.; CONTRACTOR.: “GEOTECHMIN” Ltd.

• situated in the northwest part of the complex Business Park Sofia, under the intersection of blvd. “Alexander Malinov” and str.“Samara”;
• total length - 166m; clear width of the concourses – 19.0m, width of the platform area – 16.2m;
• two concourses at both ends of the station – each with two staircases;
• two underground parking levels with two adjacent inside ramps and one outside ramp;
• third underground floor with platforms at both sides of the station;
• railway ~12.5m under the ground level;
• retaining of the excavation – diaphragm walls with width of 60 cm; propped by anchors;
• inner structure – reinforced concrete walls; four longitudinal blocks separated by expansion joints; flat slabs; reinforced concrete columns; diagonal “N”-shaped supporting joints;
• different methods of construction: the north concourse is built by open cut-and-cover method; the south concourse and the platform area – by “top-down” method; reinforced concrete diaphragm walls, supported by the intermediate slab at the level between second and third underground floor;
• the roof slab and the slabs at first and second underground level have spans of 17m;
• the diagonal “N”-supports – placed between the parking spaces, reducing the span length of the slabs;
• the slab at the south concourse is additionally supported by two rows of cast in-situ piles (ϕ60cm) and is anchored to the diaphragm walls;
• flat foundation slabs with thickness of 70cm;
• in exploitation since 2015.

METROSTATION “AKAD. AL. TEODOROV-BALAN”

METRO – SOFIA – 1-ST LINE, METROSTATION “AKAD. AL. TEODOROV-BALAN” (MS I-15), CLIENT: "METROPOLITAN" Plc.; CONTRACTOR.: “GP GROUP” Ltd.

• the metrostation is parallel to blvd.“Aleksander Malinov”; its north part is situated under the intersection of str. “Akad Aleksander Teodorov-Balan”and str.“D-r Atanas Moskov”.
• total length 166.5m; platform length – 100m;
• the whole station is situated in horizontal curve line;
• northern concourse with two staircases; middle platform part with two platforms along both sides; south concourse with two entrance/exit staircases;
• width – 22m at the concourse parts; 15.25m – at the platforms;
• the concourses are designed with two underground levels – the first one for passengers, the second one for technical rooms;
• structure – reinforced concrete walls, columns, flat slabs;
• north concourse – open cut-and-cover method; doubled structure with diaphragm walls, 60cm thick;
• flat foundation slabs with thickness of 60cm;
• roof slabs of the concourses – thickness 55-70cm, supported by walls and intermediate columns;
• roof slab in the platform area with thickness 70-80cm, supported by the walls at both sides;
• north concourse – executed by open cut-and-cover method;
• south concourse level and platform part of the station – open excavation with slopes and set-backs, according to the geological conditions;
• in exploitation since 2015.

METROSTATION “ALEKSANDER MALINOV”

METRO – SOFIA – 1-ST LINE, METROSTATION “ALEKSANDER MALINOV” (MS I-14), CLIENT: "METROPOLITAN" Plc.; CONTRACTOR.: “GP GROUP” Ltd.

• the station is situated under blvd.“Aleksander Malinov”; the northern part is under the intersection with str.“Filip Avramov”; the southern part is under the intersection with str. “St. Kipriyan”
• total length 171m; length of platform – 90m;
• north concourse with four staircases and two lifts; middle platform part with two platforms on both sides; south concourse with two entrance/exit staircases and two lifts;
• width – 21.5m at the concourses; 14.8m – at the platforms;
• the concourses are designed with two underground levels, the first one is for passengers, the second one - for technical rooms;
• the middle part has a platform level for passengers and a level under the platform - for installations;
• reinforced concrete structure – columns, flat slabs, walls under the platforms, diaphragm walls along the outer perimeter for retaining of the excavation - 60cm thick; joints between them and the slabs – by reinforced concrete dowels;
• roof slab of the concourses with thickness of 55-70cm; supported by diaphragm walls and columns;
• roof slab in the platform part with thickness 70-80cm; supported by diaphragm walls at both ends;
• north concourse – executed by open cut-and-cover method;
• south concourse and platform part of the station – by “top-down” method; order of execution: roof slab concreted on the terrain, supported by pre-executed diaphragm walls; the excavation is performed under the roof slab;
• in exploitation since 2015.

2013

METROSTATION “ISKARSKO SHOSE”

METRO – SOFIA – 1-ST LINE, METROSTATION “ISKARSKO SHOSE” (MS I-21), CLIENT: "METROPOLITAN" Plc.; CONTRACTOR.: “TRACE GROUP HOLD” Plc.

• the south-west part of the metrostation is situated under the intersection of blvd.“Iskarsko Shose” and blvd. “Kr. Pastuhov” and the north-east part of the station is under the industrial zone “Gara Iskar”;
• pedestrian underpass at the north-west end of the station (over the metro tunnel) – underground connection with the new-built train station “Gara Iskar”;
• total length - 144m; length of the platform – 87m;
• south-west concourse with three staircases and two elevators; middle platform part with platforms at both sides; north-east additional level with two entrance/exit staircases and one elevator;
• width – 22.1m and 18.1m at the concourse areas; 15.1m for the platforms;
• the concourses are designed with two underground levels – first for passengers and second for technical rooms;
• the middle part is with platform level for passengers and level under the platform for installations;
• the railway is situated ~9m under the ground level;
• pedestrian underpass with length of 97m – three staircases and one elevator near the train station;
• reinforced concrete structure – walls, columns, flat slabs; doubled structure with diaphragm walls along the outer perimeter for retaining of the excavation – thickness 60cm;
• flat foundation slab with thickness of 50cm;
• roof slab of the concourses with thickness 50-60cm, supported by diaphragm walls at the ends and intermediate columns (pre-executed piles ϕ 60cm);
• roof slab of the platform part with thickness 70-80cm; supported by diaphragm walls at both sides;
• the south-west concourse and the platform part of the station are built by “top-down” method: roof slab concreted on the terrain and supported by pre-executed diaphragm walls and piles, than the excavation is performed under the roof slab;
• the north-east concourse, pedestrian underpass and metro tunnel are executed with with open cut-and-cover method;
• in exploitation since 2015.

METROSTATION “DRUZHBA”

METRO – SOFIA – 1-ST LINE, METROSTATION “DRUZHBA” (MS I-20), CLIENT: "METROPOLITAN" Plc.; CONTRACTOR.: “STANILOV” Ltd.

• The metrostation is situated between blvd.“Tzvetan Lazarov” and str. “Kapitan Dimitar Spisarevski”, in open free area without adjacent buildings, easy accessible;
• total length 144m; length of the platform – 97m;
• south concourse with two staircases and one elevator; middle platform part with two platforms at both sides; north concourse with one entrance/exit staircase and one elevator;
• width – 22.5m for the concourses and 15.5m for the platforms;
• the concourses are designed with two underground level – first one for passengers and second one for technical rooms;
• railways ~10m under the ground level;
• in the middle platform part of the station the roof slab is partially executed at lower level to allow the transition of the highway heating pipes – ϕ1400 and ϕ1000mm;
• structure – reinforced concrete flat slabs, columns and walls along the perimeter;
• flat foundation slab with thickness 65cm;
• roof slab with thickness 60-75cm;
• executed by open cut-and-cover method, according to the geological conditions; the slope is treated with sprayed concrete and soil anchors;
• in exploitation since 2015.

ROAD JUNCTION "SOFIA RING ROAD – SLIVNITSA Blvd."

ROAD JUNCTION "SOFIA RING ROAD – SLIVNITSA Blvd.", CLIENT: ROAD INFRASTRUCTURE AGENCY; CONTR: CONSORTIUM “TRACE SRR”

three-levels road junction (part-underground, ground - and high level with overpasses);

the underground level is Sofia Ring Road;

the overpass level is blvd. “Slivnitza”;

ground level – roundabout between SRR and blvd. “Slivnitsa”;

direct local roadways;

design of all main elements and facilities of the road junction; for the estacades another structural design is developed;

main part of the design – ramps and two round bridges;

reinforced concrete structure;

the two bridges are designed with the so-called “top-down”method (excavation works for the ramps, in the middle part of the roundabout and under the bridges are made under their slabs);

the bridges are two-spanned frames with length of each span 14m.;

stiff connection between the superstructure and the substructure of the bridges;

the sidewalks are part of the slab structure;

the structure will be finished by the end of 2014.

ROAD JUNCTION “LAVOV MOST”

TRANSPORT ROAD JUNCTION “LAVOV MOST”, CLIENT: SOFIA MUNICUPALITY, CONTR: CONSORTIUM “LAVOV MOST” – “PATPROJECT 2000” Ltd.

three-levels road junction with three types of public transport – vehicle, tram and subway);

two highways along blvd “Slivnitza”, that go in tunnels under the ground and above the subway station;

roundabout on the ground level connecting the highways with blvd. “Knyaginya Maria Luiza”;

two new round bridges above the river “Vladayska”;

the tram railroad remains along the bridge “Lavov most”;

the structure is designed from cast in-situ reinforced concrete;

the construction is designed as separate blocks with deformation joints;

additional design of retaining structures, reinforced concrete collectors, shafts and steel bridges (for ingeneering infrastructure)

in operation since 2014.

SOFIA RING ROAD: SOUTHERN ARC

SOFIA RING ROAD: SOUTHERN ARC – BRIDGES AND FACILITIES - BETWEEN “MLADOST IV” AND BLVD. “TZARIGRADSKO SHOSE”; CLIENT: SOFIA MUNICUPALITY/ MUNICIPAL ENTERPRISE "SOFPROEKT – MASTER URBAN SPATIAL DEVELOPMENT PLAN"; PHASE: INITIAL DESIGN

2012

INTERSECTION “AKAD. IVAN EVSTRATIEV GESHOV” Blvd. – “BULGARIA” Blvd.

INTERSECTION “AKAD. IVAN EVSTRATIEV GESHOV” Blvd. – “BULGARIA” Blvd.; CLIENT: SOFIA MUNICIPALITY; CONTR: “BALKANSTROY" Jsc.

two-levells intersection;

first level – existing roadways and tram railroad;

second level – roundabout (that will improve the traffic capacity of the road junction)

ramps at the four sides of roundabout;

the roundabout will be supported by stay-cables, connected to the inner-and the outer parts of the circle;

stay cabels – connected to a solid independent central pier and four additional outer piers, that also support the ramps’ structure;

the advantage: no need of supports right under the roundabout; the adjacent green areas and the underpass aren’t affected;

the piers and the other columns will be supported by reinforced concrete pile foundations; length of piles – between 20 and 35m

roundabout reinforced concrete structure: horizontal beam-grid (ring-shaped slab with ring-shaped and radial beams) with great stiffness, supported by the stay-cables;

the design is developed in technical phase in 2014 and is submitted for approval in January 2015.

2010

METROSTATION “BELI DUNAV”

METRO – SOFIA – 2ND LINE, METROSTATION “BELI DUNAV” (MS II-2), CLIENT: "METROPOLITAN" Plc.; CONTRACTOR.: “GP GROUP” Ltd.

the station is situated under the intersection of blvd. “Lomsko shose”and “Beli Dunav” Str.;

at both sides of the station the structure has two levels - parking lots above the metrotunnel;

“BIAS-M” designed the metrostation and the tunnels with parking levels, and also developed the architectural design for the parking lots;

tunnel part before the station with length: 130m; width: 18m; 2 levels; 100 parking spaces;

tunnel part after the station – length: 330m; width: 13.5m; 2 levels; 300 parking spaces;

at both ends of the stational - additional levels with parking lots; the comunication between the levels and between the parking and blvd. “Lomsko shose” is with ramps;

metrostation: length:130m; width: 23m; average depth: 12.5m from the ground level to the railway level; 2 levels – platform level and intermediate level;

excavation retaining structure - with reinforced concrete diaphragm walls;

mat foundation;

inner structure – reinforced concrete walls (doubled-construction), columns, slabs and beams;

roof slab (2 types): type І – “top-down” method - the roof slab is supported by the reinforced concrete diaphragm walls and the excavation is made under the slab; type II – standart cut-and-cover (bottom-up) method;

in exploitation since 2012.

METROSTATION “NADEZHDA”

METRO – SOFIA – 2ND LINE, METROSTATION “NADEZHDA” (MS II-3), CLIENT: "METROPOLITAN" Plc.; CONTRACTOR.: “GP GROUP” Ltd.

under blvd. “Lomsko shose”, between districts “Nadezhda-1” and “Nadezhda-2”

the metrostation has the following parameters: length - 120m; width – 16m; it is the “shallowest”station - average depth: 5.5m from the ground level to the railway level; only one intermediate slab at the platform level;

direct connection with the street level (only one staircase);

design of additional pedestrian lateral underpass under the station;

construction by open cut-and-cover (bottom-up) method; excavation retaining structure with reinforced concrete cantilever diaphragm walls;

mat foundation connected to the diaphragm walls by concrete dowels;

the roof slab is supported by the diaphragm walls and one row of columns in the middle part (between the railway tracks);

in exploitation since 2012.

METROSTATION “LAVOV MOST”

METRO – SOFIA – 2ND LINE, METROSTATION “LAVOV MOST” (MS II-7), CLIENT: "METROPOLITAN" Plc.; CONTRACTOR: " Doğuş Construction and Trade " Inc.

under the intersection of blvd. “Slivnitza”and blvd. “Knyaginya Maria Luiza”; under the bridge “Lavov most” and “Vladaiska” river;

the structure consist of two parts: metrostation (130m long) and pedestrian underpass part (long 70m);

clear width of the station: 17.0m at the north part and 26.3m at the south part;

average depth: 15.25m from the ground level to the railway level;

the platform is situated in the middle part of the station;

two additional levels at both ends of the station are designed – connected with staircases and elevators;

reinforced concrete frame structure; divided in two parts (determined by the technology): part І – “top-down” method; reinforced concrete diaphragm walls, supported by one row of anchors; part II – open cut-and-cover method; reinforced concrete diaphragm walls – cantilever or supported by two rows of anchors;

the mat foundation is U-shaped in the middle part – for TBM (Tunnel Boring Machine) passing;

inner structure – reinforced concrete walls (doubled-construction), columns, slabs and beams;

in exploitation since 2012 year.

UNDERGROUND PARKING LOT – PARK “VAZRAZHDANE”

UNDERGROUND PARKING LOT IN PARK “VAZRAZHDANE”, ”ZONA B 5-4”, “VAZRAZHDANE”, SOFIA; total floor area: 5 200sq.m.; CLIENT: SOFIA MUNICIPALITY/ MUNICIPAL ENTERPRISE "SOFPROEKT – MASTER URBAN SPATIAL DEVELOPMENT PLAN"; ARCHITECTURE by: “BIAS-M”Ltd.

2009

METRO STATION “JAMES BOURCHIER”

METRO – SOFIA – 2ND LINE, METROSTATION “JAMES BOURCHIER” (MS II-11), CLIENT: "METROPOLITAN" Plc.; CONTRACTOR.: "GEOTECHMIN" Ltd.

next to intersection of blvd. “Cherni vrah”and blvd. “James Bourchier”

the deepest metrostation in Sofia – 26m from the ground level to the railway level;

three or four intermediate levels - most of them are for parking lots ~ 650 spaces.;

metrostation length: 210m; clear width 18m;

tunnel part after the station: 216m; with parking levels, clear width of 18m;

underground levels – divided to two separate sections with adjacent ramps;

reinforced concrete structure;

retaining of the excavation – reinforced concrete diaphragm walls; length up to 33.5m; width 60 cm; supported by one, two or three rows of anchors;

roof slab - constructed by the“top-down” method ; supported with diaphragm walls at the ends and in the middle of the span by single diaphragm wall acting as column;

roof slab - executed in two stages with longitudinal technological joint; the roadway could be used during the execution; post-tensioned reinforcement;

inner structure – mat foundation, reinforced walls (doubled-construction), columns, slabs and beams;

in exploitation since 2012 year.

SUBWAY TUNNEL LOT – FROM METRO STATION “MLADOST 1” TO METRO STATION “MLADOST 3”

METRO – SOFIA – 1ST LINE, LOT FROM METRO STATION “MLADOST 1” TO METRO STATION “MLADOST 3” – CONSTRUCTION FOR VENTILATION INSTALLATION BETWEEN THE STATIONS AND THE ADJACENT TUNNEL PART, CLIENT: "METROPOLITAN" Plc.; CONTRACTOR.: CONSORTIUM “METRO MLADOST”

location: alongside blvd. “Andrey Saharov”, in south-east direction, next to blvd. “Aleksandar Malinov”

the structure is devided to three separate sections with deformation joints;

first section – two-levels underground structure; first level – metro tunnel, second level – ventilation system with collector; in the process of construction the block is used as launching shaft for the excavation of the next part of the tunnel (New Austrian Tunneling Method);

second and third sections – one-level with metrotunel; before the execution of the inner construction in these blocks are developed tempopary ramps for transport of the excavated earth;

reinforced concrete structure;

retaining of excavation – mostly with diaphragm walls, at the part with ramps – solid reinforced piles (static scheme – cantilever); 1st block – the diaphragm walls are supported by one row of anchors and diagonal struts in the end parts; 2nd and 3rd blocks – with additional steel struts;

outside structure of the launching shaft – “top-down” method; retained by reinforced concrete diaphragm walls and the excavation is made under the roof slab,

the construction of II-nd and III-rd part – open cut-amd-cover method;

inner structure – reinforced walls (doubled-construction), mat foundation and roof slabs;

in exploitation since 2012.

REPOSITION OF THE TRAMWAY ALONG BLVD. “SKOBELEV”

REPOSITION AND RECONSTRUCTION OF THE TRAMWAY TO BLVD. “SKOBELEV” – IN THE PART BETWEEN BLVD. “VITOSHA” AND BLVD. “HRISTO BOTEV”; CLIENT: SOFIA MUNICIPALITY/ MUNICIPAL ENTERPRISE "SOFPROEKT – MASTER URBAN SPATIAL DEVELOPMENT PLAN"; CONTRACTOR.: “TRACE GROUP HOLD” Plc.

SOFIA RING ROAD: SOUTHERN ARC – PHASE 3

SOFIA RING ROAD: SOUTHERN ARC - PHASE 3 – BRIDGES AND FACILITIES – CLIENT: SOFIA MUNICUPALITY/ MUNICIPAL ENTERPRISE "SOFIA PROEKT "; PHASE: INITIAL DESIGN

2008

BRIDGE FACILITY

BRIDGE FACILITY, “GARDOVA GLAVA”, “VITOSHA”, SOFIA; CLIENT: “CAPO GRAIN” Plc.; ARCHITECTURE by: “LS ENGINEERING LYUBOMIR SEMERDZHIEV ARCHITECTS AND ENGINEERS” Ltd.

2003

DIAPHRAGM WALLS FOR RETAINING OF THE EXCAVATION FOR METROSTATION “JOLIOT CURIE”

METRO – SOFIA – 1ST LINE, DIAPHRAGM WALLS FOR RETAINING OF THE EXCAVATION FOR METROSTATION “JOLIOT CURIE” (MS I-10), CLIENT: "METROPOLITAN" Plc.; CONTRACTOR.: “BKS-CENTER” Plc.