The Xihoumen suspension bridget crosses the Xihoumen straight between the islands of Jintang and Cezi. It forms one part of a chain of bridges that link Zhoushan island to Ningbo, on the Chinese mainland to the south of Shanghai. It has a main span of 1650m and will be the second longest suspension bridge in the world when completed. DLT are the designers and suppliers of the deck erectuion gantries, which were originally used on the Runyang Bridge (more>) and have been modified for this project which has a different main cable spacing and diameter. 119 steel deck segments will be erected with these gantries. Maximum lift weight is 370 tonnes. DLT are also providing site supervision for the operation and maintenance of the gantries.
Northshore footbridge is a 2-span tied arch crossing the river Tees in Stockton, England. Main span is 120m, side span is 60m. The arches are steel box sections and the deck is made from precast concrete segments that are post tensioned together to form the arch ties. DLT provided expert advice to the disigners on etrection methods and details for fabrictaion and buildability and provided full erection engineering to the contractor, including stage by stage analysis, aerodynamic response analysis and detailed design of all temporary works.
DLT were responsible for the detailed design of erection engineering, all temporary works and cable system for this self anchored suspension bridge with a main span of 92.3m. The bridge was completed by a local contractor in May 2007. More>
DLT/FNP JV are acting as advisors to the Client on key technical issues regarding the design and construction of the central tower on this 3 tower, 2x1080m span, suspension bridge which is currently at the design stage. Our work includes advising on the rigidity of the four leg tower, the risk of main cable slip over the tower, bridge articulation, use of hydraulic dampers and movement limiting devices and seismic analysis and design.
The Shibanpo bridge is a multi-span in-situ concrete box girder bridge designed by TY Lin with a main span of 330m. The central 108m of the main spanwas designed as a steel box girder to save weight, which wwas delivered to site in 3 pieces - a 1325 tonne, 103m centre section and two 100 tonne 2.5m long steel transition pieces that connect it to the concrete deck at either end. All three units were erected using strand jacks by DLT. 8 No DL-S418 strand jacks were used for lifting, which were monitored and controlled by a single operator using the DL-P40 computer control system. The three lifts took place in June/July 2006. More>
The ChaoTianMen arch bridge crosses the Yangtze river in the city of Chongqing in South West China. It has a tied arch main span of 552m with continuous side spans of 190m, and has been designed to resemble the Sydney Harbour Bridge, completed by Dorman Long & Co. in 1932. DLT are acting as consultant to the main contractor, 2nd Navigation engineering Bureau and are responsible for developing and detailing the construction method to be used. On completion this will be the longest arch span in the world, a record currently held by the Lupu bridge in Shanghai (550m).
At over 3km long and with two cable stay spans of 300m, this project provides many engineering challenges. The steel box girder deck for the 60m approach spans is being launched in pre-assembled units of up to 2413 tonnes. The steel box girder deck of the two cable stay main spans is being erected by balanced cantilever in 250 tonne segments using specially designed deck erection gantries. DLT are responsible for supply and operation of the strand jack systems for launching of the approach spans and for lifting & skidding of the main span deck units. More>
Boyne
cable stayed bridge, Ireland
DLT were responsible for the design of the superstructure, as an alternative to the client’s design, detailed design of the erection methods for all elements of the deck and for supply and operation of the strand jacking systems used to launch the deck into final position. More>
DLT were responsible for the design of the superstructure, as an alternative to the client’s design, detailed design of the erection methods for all elements of the deck and for supply and operation of the strand jacking systems used to launch the deck into final position. More>
Carquinez
suspension bridge, California
DLT were responsible for all aspects of construction engineering for the bridge deck, main cables and hangers for this 728m span suspension bridge. We also undertook the sub-contract to erect the 24 No. 700 tonne steel deck units, which was carried out using strand jacks. More>
DLT were responsible for all aspects of construction engineering for the bridge deck, main cables and hangers for this 728m span suspension bridge. We also undertook the sub-contract to erect the 24 No. 700 tonne steel deck units, which was carried out using strand jacks. More>
Bishop's
bridge replacement, Paddington Station, London
The existing 3 span masonry bridge and steel truss span which cross 15 rail lines at the entrance to London's Paddington Station are currently in the process of being replaced with a new six lane composite bridge. The masonry spans are being demolished and the 940 tonne truss bridge has been lifted 9.8m to allow assembly and incremental launching of the new 2500 tonne bridge deck. DLT are responsible for conceptual and detailed design of all construction methods and supply and operation of all jacking systems for the lifting and launching operations, all of which take place within limited railway possessions. More>
The existing 3 span masonry bridge and steel truss span which cross 15 rail lines at the entrance to London's Paddington Station are currently in the process of being replaced with a new six lane composite bridge. The masonry spans are being demolished and the 940 tonne truss bridge has been lifted 9.8m to allow assembly and incremental launching of the new 2500 tonne bridge deck. DLT are responsible for conceptual and detailed design of all construction methods and supply and operation of all jacking systems for the lifting and launching operations, all of which take place within limited railway possessions. More>
El Damar Bridge will carry the new road currently being constructed between Atbara and Merowie in Sudan, over the River Nile, close to the town of El Damar. The Nile is over 850m wide at the bridge location, divided into two channels by an island midway between the banks. The deck will comprise 21 No. 40.9m span precast, post-tensioned T girders with insitu reinforced concrete slab. It will be supported on cross beams carried by circular reinforced concrete column bents and piled foundations. DLT are consultants for conceptual and detailed design of the bridge & foundations.
With a main span of 1088m the Sutong Cable stayed bridge is the longest span cable stayed bridge in the world. DLTwere sub-contractors to 2nd Navigation Engineering Bureau for the design, supplyand operation of the eight deck erection gantries that were used to erect the 84 No steel orthotropic deck segments, each weighing up to 450 tonnes, between 9th November 2006 and 9th June 2007. More>
Sutong
cable stayed bridge, China
DLT were sub-contractors for the lowering by strand jacks of a 3050 tonne steel caisson to pier 4, from its assembly position above water level to its final submerged position. The operation was carried out in October 2004 using 16 No DL-S418 strand jacks controlled and synchronised by a single operator using a DL-P40 computer control unit. With a 1088m main span, the Sutong bridge will be the largest cable stay bridge in the world when completed. More>
DLT were sub-contractors for the lowering by strand jacks of a 3050 tonne steel caisson to pier 4, from its assembly position above water level to its final submerged position. The operation was carried out in October 2004 using 16 No DL-S418 strand jacks controlled and synchronised by a single operator using a DL-P40 computer control unit. With a 1088m main span, the Sutong bridge will be the largest cable stay bridge in the world when completed. More>
Yangluo
suspension bridge, China
DLT have been appointed as
construction engineers to to the main contractor, CHEC.2nd Navigation
Engineering Bureau for erection of the cables on this 1280m span suspension
bridge across the Yangtze river near Wuhan. Our work includes concept
design of the walkways, tower top steelwork & PPWS cable erection.
Tuti
suspension bridge, Khartoum
DLT are responsible for the permanent works design and erection engineering for this landmark structure in the centre of Khartoum. The bridge has a main span of 210m and has been designed for construction by local labour. More>
DLT are responsible for the permanent works design and erection engineering for this landmark structure in the centre of Khartoum. The bridge has a main span of 210m and has been designed for construction by local labour. More>
Popolopen
footbridge, NY, USA
DLT were responsible for the detailed design of this 140m span suspension footbridge on the Appalachian trail. Innovative design and use of composite materials resulted in this aesthetic and durable structure. More>
DLT were responsible for the detailed design of this 140m span suspension footbridge on the Appalachian trail. Innovative design and use of composite materials resulted in this aesthetic and durable structure. More>
The new airport passenger bridge at Gatwick Airport, UK, spans 128m across a busy taxi way. To reduce disruption to the airport, the bridge was assembled off site, complete with cladding and internal fit out and then transported and erected in a 10 day closure of the taxi-way. DLT were responsible for the detailed design of a pair of 1640 tonne capacity gantries for lifting the completed bridge into final position, weighing 2,660 tonnes. The bridge was lifted using 8 No 410 tonne capacity strand jacks and the gantries were constructed from a modified proprietary jacking tower system. More>
Runyang
suspension bridge, China
DLT were responsible for the design, supply and commissioning of 4 No 370 tonne capacity deck erection gantries for this 1490m main span suspension bridge. These gantries walk the main cables and work in pairs to erect steel deck units weighing up to 470 tonnes each. The gantries can be self erected onto the main cables and are easily adapted for future projects with different cable centres and diameter. More>
DLT were responsible for the design, supply and commissioning of 4 No 370 tonne capacity deck erection gantries for this 1490m main span suspension bridge. These gantries walk the main cables and work in pairs to erect steel deck units weighing up to 470 tonnes each. The gantries can be self erected onto the main cables and are easily adapted for future projects with different cable centres and diameter. More>
Sheikh
Khalifa Bin Salaman Causeway Bridge, Bahrain
DLT were responsible for erection engineering of the bridge steel structure, involving offsite assembly of the 3000 tonne main span, transport to site and lifting in one piece into final position using 8 No 500 tonne capacity strand jacks. More>
DLT were responsible for erection engineering of the bridge steel structure, involving offsite assembly of the 3000 tonne main span, transport to site and lifting in one piece into final position using 8 No 500 tonne capacity strand jacks. More>
Jiangyin
suspension bridge, China
DLT were responsible for detailed erection engineering, equipment supply and site supervision for deck erection on this 1385m main span suspension bridge. More>
DLT were responsible for detailed erection engineering, equipment supply and site supervision for deck erection on this 1385m main span suspension bridge. More>
Tsing
Ma suspension bridge, Hong Kong
DLT were responsible for detailed erection engineering, equipment supply and site supervision for deck erection on this 1377m main span suspension bridge. More>
DLT were responsible for detailed erection engineering, equipment supply and site supervision for deck erection on this 1377m main span suspension bridge. More>
A2/M2
Medway Bridge, Kent, UK
DLT were responsible for the design, supply and operation of a 800 tonne capacity climbing jack system for the lifting and lowering of temporary formwork support trusses for the construction of 80m long in-situ post tensioned concrete approach spans. More>
DLT were responsible for the design, supply and operation of a 800 tonne capacity climbing jack system for the lifting and lowering of temporary formwork support trusses for the construction of 80m long in-situ post tensioned concrete approach spans. More>
Tamar
suspension bridge strengthening & widening, UK
DLT were responsible for value engineering of the permanent strengthening& widening works and conceptual and detailed design of all erection and demolition methods and related temporary works for carrying out this upgrade to the existing 335m span suspension bridge. More>
DLT were responsible for value engineering of the permanent strengthening& widening works and conceptual and detailed design of all erection and demolition methods and related temporary works for carrying out this upgrade to the existing 335m span suspension bridge. More>
Lions
Gate suspension bridge deck replacement, Vancouver
DLT were responsible for supply & operation of a strand jacking system to carry out replacement of the complete bridge deck in 54 sections, each within a 10 hour overnight closure of the bridge. 4 No DL-S60 strand jacks (plus 2 No spare jacks) with power and control system for a lifting speed of 60 metres per hour were supplied to the main contractor, American Bridge.
DLT were responsible for supply & operation of a strand jacking system to carry out replacement of the complete bridge deck in 54 sections, each within a 10 hour overnight closure of the bridge. 4 No DL-S60 strand jacks (plus 2 No spare jacks) with power and control system for a lifting speed of 60 metres per hour were supplied to the main contractor, American Bridge.