Main project features:
The civil works contracts for which these supervision services will apply consists of the seven contracts as following:
Contracts CW1A Lot 1 and CW1A Lot 2 (Km0- Km9+155)
Construction of approximately 9.2 km of urban road and bridges from Bac Son to the approach to Dong Khe Bridge. This section of road comprises a main dual 2 lane carriageway with a cross-section of 27.5m
Contracts CW2A Lot 1 and CW2A Lot 2 (Km9+155-Km13+450)
Construction of approximately 4.3 km of urban road and bridges including Dong Khe bridge and Niem 2 bridge. This section comprises 4 carriageway lanes with a cross-section of 50.5 m.
There are two large cantilever box girder bridges in this section, the Dong Khe bridge and Niem 2 bridge, each with a width of 14.0 m, the distance between two edge of handrail is 2.0 m, the bridge spans arrangement shall be 4 x 33.0 m + (75+120+75) m + 4 x 33.0 m, with total length of 543.7 m; superstructure of main span is continuous box-girder construction by cantilever method; the approaching girders are PC “I-shape” girders and cast in place link slab; the substructures used are cast in place RC pier and abutment; and foundation used is bored pile with the diameter of pile 1.0 m for abutments and 1.5 m for main piers.
Contract CW3A (Km 13+450-Km 16+100)
Construction of approximately 2.65 km of urban road, underpass and dyke relocation. This section consists of 4 carriageway lanes with a cross section of 50.5 m except for a small section of Rao Tunnel and the section along the Lach Tray river which will be constructed to a width of 26.5 m. This contract also includes an underpass under the approach to Rao 1 bridge and a reinforced concrete wall of length about 1.3 km in the vicinity of Lach Tray river
Contract CW4A (Km 16+100-Km 19+868.41
Construction of approximately 3.77 km of urban road. The section consists of 4 carriageway lanes with a cross section of 50.5 m.
Contract CW5A
Construction of a replacement bridge for the current existing Niem 1 bridge. The superstructure will consist of a main span using steel arch, approach spans using simple girder with PC “I-shape” and cast in place link slabs. The substructure shall use a cast in place RC pier and abutment and bored piles for the new abutment. The approach road at the end of bridge consists of retaining walls.
Consultant:
The principle consultant is CDM Smith Inc. (USA) and the local consultants are Asicosult and Hongha
The services started in September 2013
Asicosult’s roll:
Provide local personnel with the number of 54 personnel