Temburong Bridge, Brunei – Ground Engineering - Part 1: Engineering Geology

The new 30 km Cadangan Projek Jambatan Temburong (Temburong Bridge Project) in Brunei will provide a highway link between the two separated parts of Brunei, by spanning Brunei Bay. The complex geological setting brings particular challenges to the design and construction of the foundations required for the various forms of bridge structures. The varying depths of geological stratigraphy along the alignment and different loading conditions call for multiple deep foundation types, as well as different construction methodologies, to be adopted. Part 2 of this paper on the Ground Engineering aspects of the project focuses on the choices of foundation for different sections of the crossing, the geotechnical design approach and verification strategy, and the relevant computer analyses undertaken.

Temburong Bridge, Brunei – Ground Engineering - Part 2: Geotechnical Design

Ferrero¹,

Leung²,

Ngan³

et al. 2015

Temburong Bridge, Brunei – Procurement Strategy, Design Basis and Specifications

Kite¹,

Hooton

McNulty

et al. 2015

The new Cadangan Projek Jambatan Temburong (Temburong Bridge Project) in Brunei will connect the relatively isolated district of Temburong with the more developed Brunei-Muara district. It is a 30km long dual two-lane highway which includes 14km of marine viaducts and 2 cable stayed bridges over Brunei Bay, 12km of viaducts through Temburong, as well as tunnels and other viaduct structures in Brunei-Muara. The project is procured as a traditional engineer-design, contractor–construct arrangement under five contract packages.The design of the structures is to the Eurocode and the UK National Annexes, with project specific criteria developed to account for the different environmental conditions between Brunei and the UK. The design of the cable stayed bridges is one of the first applications of the Eurocode to a fully concrete cable stayed bridge. The project specific Design Basis report defines the requirements for the design of the Works during the detailed design phase and then later it is used by the contractor to understand what design assumptions were adopted in the permanent works design.Historic wind data was used to determine a site specific wind climate which defines the design wind speed as well as the turbulence intensity. Further risk assessments were conducted to determine appropriate criteria for design against major fire incidents.Major studies were undertaken into durability. This led to specific requirements for concrete mix, use of stainless steel reinforcement in splash zone areas and review of sacrificial steel thicknesses for steel pipe piles.This paper provides details of the procurement strategy and design criteria, including project specific aspects, as described above. It also outlines aspects of the specification for the project which form part of the construction contracts.

Temburong Bridge, Brunei – CC2 Marine Viaducts in Brunei Bay

To¹,

Chong²,

Lük³

et al. 2015

The new 30 km Cadangan Projek Jambatan Temburong (Temburong Bridge Project) in Brunei will connect the relatively isolated district of Temburong with the more developed Brunei-Muara district. The project includes over 14 km of marine viaducts crossing Brunei Bay which will be built under Construction Contract CC2.The shallow waters of Brunei Bay, very soft ground conditions and a fast track programme pose significant challenges to both design and construction. Maximising the use of precast concrete and the repetition of details are key to delivering the scheme in an economical and timely manner.The vast majority of foundations are groups of spun concrete piles. The superstructure will be in the form of twin post-tensioned concrete single-cell, box girders with 50m spans, built by span-by- span erection method.