hkskyline
April 14th, 2006, 05:34 AM
Source : http://www.building.com.hk/photoessay/route3c/r3cfront.html
http://www.building.com.hk/photoessay/route3c/photos/r3c01b.jpg
Ting Kau Bridge, at the northern end of the Rambler Strait, is one of the major sections linking Route 3 from the north-western New Territories to Kowloon. This photo was taken in July 1997, when the first section of the bridge deck in the middle tower could barely be seen.
http://www.building.com.hk/photoessay/route3c/photos/r3c02b.jpg
A detailed look at the top of the bridge tower. A steel gantry with two pairs of strand-jacks was erected on top of each tower to lift the 190-tonne steel tower heads on which the cable anchors are housed. The 4.5 m x 31 m slot on the top of the tower is for the placement of the tower heads.
http://www.building.com.hk/photoessay/route3c/photos/r3c03b.jpg
The steel tower head rests on the 29 m radius cofferdam on the Tsing Yi side. It will be lifted to the top of the tower after final inspection. The lifting bracket on the right side has already had the strands tightened to the strand-jack on top of the tower.
http://www.building.com.hk/photoessay/route3c/photos/r3c05b.jpg
December 1997: the bridge as seen from the Tsing Yi side looking towards Ting Kau. The 1,177-metre cable-stayed bridge is supported by three towers, with the 200 m middle tower being the tallest. Erection of the steel/concrete composite deck started from the tower on Ting Kau towards the Tsing Yi side, with a lapse of about a month between each tower. At the peak of construction, six frontages were provided at the ends of the deck sections, making the progress of work extremely fast.
http://www.building.com.hk/photoessay/route3c/photos/r3c06b.jpg
Typical set-up for deck erection as seen from the Ting Kau bridge tower. The deck on the trunk of the tower was initially erected by forming a working base with standard struts and girders. Four derrick cranes are lifted by strand-jack to the base for onward extension of the bridge deck on both sides. In order to stabilise the partially completed deck from wind, the deck was temporarily anchored with tie cables.
http://www.building.com.hk/photoessay/route3c/photos/r3c07b.jpg
As the bridge is a single-tower design with decks on both sides, a separating slot connected by cross girders, is formed between the two decks. This slot provides an aerodynamic effect and helps stabilise the bridge structure under strong wind. The steel anchor heads for the stay cable and transverse cable can be seen here.
http://www.building.com.hk/photoessay/route3c/photos/r3c09b.jpg
The connection of the deck to the Tsing Yi Abutment, as viewed from the top of the tower. The layout of the precast concrete panels which form the composite deck structure is clearly shown.
http://www.building.com.hk/photoessay/route3c/photos/r3c10b.jpg
The bridge deck as seen from the underside. The cross struts that rest on the waist of the tower, the main and cross girders, and the underside-mounted sliding work platform, can be seen in the photo.
http://www.building.com.hk/photoessay/route3c/photos/r3c25b.jpg
The slip road at Au Tau takes the form of a viaduct passing over wetlands. It is constructed by a segment launching machine using precast box section girder units.
http://www.building.com.hk/photoessay/route3c/photos/r3c26b.jpg
http://www.building.com.hk/photoessay/route3c/photos/r3c27b.jpg
http://www.building.com.hk/photoessay/route3c/photos/r3c11b.jpg
Detail of the bridge abutment on the Tsing Yi side. This abutment is designed to house the bridge expansion joint. Rows of nozzle-link tubes are the dead anchors for the stay cable (those on the tower head are known as stressing anchors).
http://www.building.com.hk/photoessay/route3c/photos/r3c12b.jpg
Looking up to the approach viaduct. The viaduct, which was constructed using a balanced cantilever method, spans Castle Peak Road 60 metres below.
http://www.building.com.hk/photoessay/route3c/photos/r3c13b.jpg
The formwork gantry used to construct the box section viaduct. The construction spread outward, section by section, from the central pier. When a four-metre section is completed and the concrete is cured, the gantry on top of the deck slides a section forward, suspending the form below to repeat the construction of the next section.
http://www.building.com.hk/photoessay/route3c/photos/r3c14b.jpg
The layout arrangement of the approach viaduct on Ting Kau as seen from the top of the bridge tower. Castle Peak Road, Tuen Mun Highway, and the entrance to Tai Lam Tunnel are barely visible.
http://www.building.com.hk/photoessay/route3c/photos/r3c15b.jpg
The slip road from Tuen Mun Highway to Tai Lam Tunnel was constructed using two different methods. The section near the approach viaduct utilised a balanced cantilever method due to its larger span. The farther section, as seen in the photo here, is constructed of precast beams with in situ reinforced concrete deck. To overcome the problem of access, a temporary mini-rail was erected on the deck of the slip road.
http://www.building.com.hk/photoessay/route3c/photos/r3c16b.jpg
Close-up of the mini-rail transporter and the launching machine used to install the precast beams for the slip road deck.
http://www.building.com.hk/photoessay/route3c/photos/r3c17b.jpg
A 700 m x 150m x 90 m section links the approach viaduct at Ting Kau and the Tai Lam Tunnel. The road was cut from hard and highly abrasive granite, and the photo shows rows of 100 mm bore holes, drilled to a 12 m depth in staggered layers to facilitate the blasting process.
http://www.building.com.hk/photoessay/route3c/photos/r3c01b.jpg
Ting Kau Bridge, at the northern end of the Rambler Strait, is one of the major sections linking Route 3 from the north-western New Territories to Kowloon. This photo was taken in July 1997, when the first section of the bridge deck in the middle tower could barely be seen.
http://www.building.com.hk/photoessay/route3c/photos/r3c02b.jpg
A detailed look at the top of the bridge tower. A steel gantry with two pairs of strand-jacks was erected on top of each tower to lift the 190-tonne steel tower heads on which the cable anchors are housed. The 4.5 m x 31 m slot on the top of the tower is for the placement of the tower heads.
http://www.building.com.hk/photoessay/route3c/photos/r3c03b.jpg
The steel tower head rests on the 29 m radius cofferdam on the Tsing Yi side. It will be lifted to the top of the tower after final inspection. The lifting bracket on the right side has already had the strands tightened to the strand-jack on top of the tower.
http://www.building.com.hk/photoessay/route3c/photos/r3c05b.jpg
December 1997: the bridge as seen from the Tsing Yi side looking towards Ting Kau. The 1,177-metre cable-stayed bridge is supported by three towers, with the 200 m middle tower being the tallest. Erection of the steel/concrete composite deck started from the tower on Ting Kau towards the Tsing Yi side, with a lapse of about a month between each tower. At the peak of construction, six frontages were provided at the ends of the deck sections, making the progress of work extremely fast.
http://www.building.com.hk/photoessay/route3c/photos/r3c06b.jpg
Typical set-up for deck erection as seen from the Ting Kau bridge tower. The deck on the trunk of the tower was initially erected by forming a working base with standard struts and girders. Four derrick cranes are lifted by strand-jack to the base for onward extension of the bridge deck on both sides. In order to stabilise the partially completed deck from wind, the deck was temporarily anchored with tie cables.
http://www.building.com.hk/photoessay/route3c/photos/r3c07b.jpg
As the bridge is a single-tower design with decks on both sides, a separating slot connected by cross girders, is formed between the two decks. This slot provides an aerodynamic effect and helps stabilise the bridge structure under strong wind. The steel anchor heads for the stay cable and transverse cable can be seen here.
http://www.building.com.hk/photoessay/route3c/photos/r3c09b.jpg
The connection of the deck to the Tsing Yi Abutment, as viewed from the top of the tower. The layout of the precast concrete panels which form the composite deck structure is clearly shown.
http://www.building.com.hk/photoessay/route3c/photos/r3c10b.jpg
The bridge deck as seen from the underside. The cross struts that rest on the waist of the tower, the main and cross girders, and the underside-mounted sliding work platform, can be seen in the photo.
http://www.building.com.hk/photoessay/route3c/photos/r3c25b.jpg
The slip road at Au Tau takes the form of a viaduct passing over wetlands. It is constructed by a segment launching machine using precast box section girder units.
http://www.building.com.hk/photoessay/route3c/photos/r3c26b.jpg
http://www.building.com.hk/photoessay/route3c/photos/r3c27b.jpg
http://www.building.com.hk/photoessay/route3c/photos/r3c11b.jpg
Detail of the bridge abutment on the Tsing Yi side. This abutment is designed to house the bridge expansion joint. Rows of nozzle-link tubes are the dead anchors for the stay cable (those on the tower head are known as stressing anchors).
http://www.building.com.hk/photoessay/route3c/photos/r3c12b.jpg
Looking up to the approach viaduct. The viaduct, which was constructed using a balanced cantilever method, spans Castle Peak Road 60 metres below.
http://www.building.com.hk/photoessay/route3c/photos/r3c13b.jpg
The formwork gantry used to construct the box section viaduct. The construction spread outward, section by section, from the central pier. When a four-metre section is completed and the concrete is cured, the gantry on top of the deck slides a section forward, suspending the form below to repeat the construction of the next section.
http://www.building.com.hk/photoessay/route3c/photos/r3c14b.jpg
The layout arrangement of the approach viaduct on Ting Kau as seen from the top of the bridge tower. Castle Peak Road, Tuen Mun Highway, and the entrance to Tai Lam Tunnel are barely visible.
http://www.building.com.hk/photoessay/route3c/photos/r3c15b.jpg
The slip road from Tuen Mun Highway to Tai Lam Tunnel was constructed using two different methods. The section near the approach viaduct utilised a balanced cantilever method due to its larger span. The farther section, as seen in the photo here, is constructed of precast beams with in situ reinforced concrete deck. To overcome the problem of access, a temporary mini-rail was erected on the deck of the slip road.
http://www.building.com.hk/photoessay/route3c/photos/r3c16b.jpg
Close-up of the mini-rail transporter and the launching machine used to install the precast beams for the slip road deck.
http://www.building.com.hk/photoessay/route3c/photos/r3c17b.jpg
A 700 m x 150m x 90 m section links the approach viaduct at Ting Kau and the Tai Lam Tunnel. The road was cut from hard and highly abrasive granite, and the photo shows rows of 100 mm bore holes, drilled to a 12 m depth in staggered layers to facilitate the blasting process.