This project refers to the following bridges into the Concession Marão Tunnel.
7 Viaducts: V4 (Length = 195m, major span: 85m), V5 (Length = 220m, major span: 85m), V6 (Length = 130m, major span: 40m), V7 (Length = 150m, major span : 40m), V8 (Length = 230m, major span: 40m), V9 (Length = 160m, major span: 40m) and V10 ( Length = 280m, major span: 44m). The execution of these projects was according to the typology, the span and the foundation conditions. Where made by falsework supported on the ground, with launching girder or through successive advances.
The New Portela Bridge allows the crossing of the Mondego River, having replaced the previous bridge.
The new bridge has a total length of 189.2m, divided into four spans with the following dimensions 44.5 + 2 x 50.1 + 44.5m.
The bridge deck is a steel-concrete hybrid structure, supported by abutments and piles of reinforced concrete.
This project refers to the following bridges into the West Coast Subconcession:
13 Viaducts: Section IC2 VB– V1 (Length=252m, Major Span: 36m), V2 (Length=218m, Major Span: 36m) e V3 (Length=230m, Major Span: 36m), Section IC9 FO – V1 (Length=149m, Major Span: 33m), V2 (Length=138m, Major Span: 36m), V3 (Length=174m, Major Span: 36m) e V5 (Length=218m, Major Span: 36m); Section IC9 JF - V1 (Length=50m, Major Span: 24m), V2 (Length=281m, Major Span: 33m) e V3 (Length=257m, Major Span: 36m); Section IC36 L - V1 (Length=348m, Major Span: 36m), V2 (Length=184m, Major Span: 36m) e V3 (Length=814m, Major Span: 39.5m).
The deck structural solution used pre-cast “I” or “U” type pre-stress reinforced concrete beams. The deck also has pre-cast slab panels to avoid formworks.
This project refers to the replacement of Penacova’s Bridge deck above the Mondego River.
The bridge shows a total length between end supports of 146,70 m with the following spans: 33.35+80.00+33.35m.
The deck consists in two plate beams with a parabolic variation of height and 2.00m at the span and above the abutments. The slab is in reinforced concrete constructed with precast panels.
Each beam rests on the piers through high damping bearings (HDRB type) to contain the longitudinal force transmitted to these elements.
This project refers to the inspection and rehabilitation of Angeja Bridge over the Vouga River.
The crossing is made by an isotactic deck composed by Gerber beams with variable inertia with a total length of 250.60 m (11 spans). The wall-pillars have a rounded rectangular section and the foundations are indirect.
The works included the construction of new piles for strengthening of the foundation and rebuild of the deck girders in the tip of the cantilevers to strengthening the zones where the bearings for the simple supported spans are located.
The repair was made with concrete grouting, injection of cracks, replacement of the expansion joints and paint.
This project refers to the inspection and detailed design of the rehabilitation and strengthening of the Chamusca Bridge over the Tagus River.
The bridge connects the two banks of the Tagus River with a total length of 756m divided in eleven spans. The end spans have 57.1 m long and the intermediate spans have 71.3 m.
The bridge deck is composed by superstructure metallic box that is based on two longitudinal truss beams connected at the top and bottom by a bracing system composed by diagonals and perpendicular chords. At the bottom there is a chord structure comprising a metal grid which allows the support of a reinforced concrete slab.
New high damping bearings were placed in piers and abutments, lowering the structure response due to seismic action. It was also necessary to strengthen the piers base and its foundations.
This project refers to the inspection and rehabilitation of the metallic bridge of Portimão.
The bridge connects the two banks of the River Arade, has a total length of 332m and it´s major span has 47m. The project is composed by the main bridge and a span of the riverside.
The deck structure consists in two metallic box supported by truss beams. The span of the riverside is a metal grille.
The reinforcement for the seismic action consisted of hydraulic dampers placing, the implementation of a retaining structure, consolidation of pillars and abutments and jet-grouting. The road platform was replaced by prefabricated slabs supported in the knot of the truss. The repair included treatment of metal, injection of cracks, replacement of expansion joints and painting.
Total length of the crossing: 1581m
Road Access to the bridge: 15 km
This projects referes to the urban planning of the southern area of Maputo, the KaTembe.
The Road Project includes:
i) the highway Maputo/ KaTembe/ Ponta do Ouro
ii) insertion roads in Maputo to access the bridge at the North bank of the Estuary
iii) urban road network in KaTembe district. The Master Plan for the Urbanization of the Municipal District KaTembe provides 4056ha of urban ground and defines extensive areas for housing, commerce and services, industry & logistics, tourism and residencial tourism, waterfront and nautical zones.
These projects refere to the urban planning of the southern area of Maputo, the KaTembe.
This territory is sparsely populated and only accessed by ferryboat but the new bridge will soon improve the region bringing new road accesses, confort, safetty and a better life for the population at the capital, Maputo.
BETAR is the technical auditor of the bridge project designed by CRBC. The main structure is a suspension bridge with 680m of central span.
The Master Plan for the Urbanization of the Municipal District KaTembe provides 4056ha of urban ground and defines extensive areas for housing, commerce and services, industry & logistics, tourism and residencial tourism, waterfront and nautical zones. It includes a few viaducts over Bangoloene swamp with 150m length.
Este projecto respeita à beneficiação do tabuleiro da ponte Açude e à reabilitação das estruturas dos viadutos de acesso, compreendendo 2344m de extensão de plataofrmas rodoviárias.
O projecto e as obras de reabiltiação foram desenvolvidos em duas fases, sendo uma delas com carácter de Emergência incidindo sobre pilares críticos que apresentavam indícios de rotura iminente.
Os trabalhos realizados de acordo com o Proejcto de Execução compreenderam o seguinte:
1) Reforço de pilares através de 3 tipos de intervenção conforme a sua localização e dano:
- reforço de armadura de cintagem
- encamisamento e reforço de armaduras long. e cintagem
- substituição de pilar com suspensão temporária do tabulerio e colocação de aparelhos de apoio unidireccionais no topo
2) Reforço sísmico transversal nos encontros
3) Reforço das fundações de encontro envolvendo recosntrução de mesa de estribo e espelho
4) Reperfilamento da plataforma e injecção de fendas