the separating land gap between ngau hom shek and ha deep...

48 Construction & Contract News 2007 No. 3

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Deep Bay Link –Northern Section

The separating land gap between Ngau Hom Shek and HaTsuen being cut to form a pass for the crossing of the DeepBay Link before joining the approach viaduct of the WesternCorridor as seen in early 2004

The same land gap being formed with pier heads for theelevated carriageway basically in place. Note thetemporary access roadway and the partly completed sloperetaining structure on the left side of the photo

The same land gap as viewedfrom Ngau Hom Shek towardHa Tsuen d i rect ion. Anabutment structure can beseen on the lower right cornerto receive the carriagewayonto at-grade position

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Close up of the slope cuttinga n d t h e c a r r i a g e w a yapproaching the at-gradesection. Backfilling to theabutment side and slopetreatment with landscapingprovision would be done at alater stage

T h e a l i g n m e n t o f t h ecarriageway enters into theflatland of Ha Tsuen and runson an elevated position forabout 3.4 km (with about asection of 500 m at-grade)after this bend at the end oft h e s l o p e - c u t . T h ecarriageway reaches CastlePeak Road until it joins theSouthern Section of DeepBay Link

There are a few sections ofDeep Bay Link (NorthernSection) constructed at-grade. Various forms ofabutment structure would beprovided to receive thecarriageway from elevated toat-grade position. This photoshows a section of abutmentstructure at Ha Tsuen E��F

with the head segmentalready in place

Preparing for the concretingwork at the final connectingsection of viaduct betweenthe Western Corridor andDeep Bay Link (NorthernSection) as seen in mid 2006


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In order to cross over the track alignment of West Rail,Light Rail Transit and Castle Peak Road, the deck ofDeep Bay Link rises to about 35 m from ground levelnear Yick Yuen Tsuen E�� F until finally aligned to theYuen Long Highway. The photo shows the giganticportal frames which will be used to support the dual 3-lane carriageway. The pieheads on the side of portalbeam are constructed in-situ for the connection of theprecast segment. The components of the launchinggirder can be seen on ground (blue in color) ready forassembly to facilitate the erection of the viaduct

Side view of a pier head with a set of lifting frameinstalled at the deck level for the lifting and erectionof the precast segments that form the viaduct. Thevillage houses as seen in the background are withinTsing Chuen Wai E�� F of Lam Tei

Close up showing the construction set-up of agigantic portal frame with the complicatedfalsework in view. The falsework will support thecasting of the portal beam which weighs morethan 800 tons

A series of completed portal frames with a set of launching girder in position ready for the erection ofthe viaduct in a lane-by-lane sequence

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R o w s o f p o r t a l f r a m e sapproaching the track of WestRail as viewed in early 2005

The size of the viaduct structure of DeepBay Link can be better comprehended fromthis photo as it passed along the side of thevillage houses of Tsing Chuen Wai

The final section of viaductjoining the Northern andSouthern Sections of DeepBay Link located above theCastle Peak Road at Lam Tei


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The final section of viaduct joining theNorthern and Southern Sections of DeepBay Link as viewed from the side. Justslightly outside the boundary of this photo,the elevated track of West Rail is on the leftand Castle Peak Road is on the right, with aseparating distance of about 250 m

From the viaduct viewing downward seeing a trainrushing through the elevated track of West Rail.The gantry in blue on each side is the travelingformwork system used to cast the box-sectiondeck of the viaduct in-situ

Close up of a section of the viaduct constructed in balanced-cantilever arrangement using sets of girder-mounted travelingformwork on both ends. The village houses around Yick YuenChuen forms an impacting background showing the fragilenature of the project environment

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Panoramic view seeing the viaduct approaching the elevated track of West Rail from YickYuen Chuen and Ching Tsuen Wai before the crossing over. The portal frame on the rightside is the joining section between the Northern and Southern Sections of Deep Bay Link

The completed viaduct section running above the West Rail as seen in early 2007

Partially completed viaduct as viewed from an elevated position on the platform of alaunching gantry before Tsing Chuen Wai with the track of West Rail running crossing inthe middle of photo


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The adjoining section between the WesternCorridor and the Deep Bay Link Northern Sectionperforming its final touch-up works on slope,landscaping provision and other associatedtreatment before the handing over

Panoramic view of the elevated carriageway as seen in early 2007 running elegantly along the west-bound of Ha Tseun flatland. On the right side of thephoto is the Ha Tsuen Interchange which is provisioned for the future development of the nearby area. The mis-use condition of the country area with largeamount of container handling stations, lorry parking field, temporary store for construction materials or recycling facilities can be found everywhere in thevicinity forming a latent problem to the country environment here

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The actual "country-side" environment as view from thedeck of the carriageway at Ha Tsuen. The high-rise buildingclusters form a contradicting background in the photo

Deck view near the adjoining link between the Northern andSouthern Section with the noise screen erected before thehanding over. The high-rise buildings forming the backgroundare the residential development in Lam Tei area

Final touch-up on theground level near TsingChuen Wai. A slip road isprovided in this location(photo centre) allowingaccess to the area in future


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Deep Bay Link –Southern Section

The widening of Yuen Long Highway to incorporate an interchange atLam Tei is a major component of the Deep Bay Link Southern Sectioncontract. The reconstruction and widening of the 2 km section of YuenLong Highway stretches from Fu Tei E��F to Tan Kwai Tsuen E�� F.The photo shows the early stage of road widening with temporary trafficdiversion arranged to facilitate the foundation works and the constructionof pier supports for the crossing sliproad

In some locations the widening of Yuen Long Highwayrequires the construction of new retaining structure andbackfill afterward to form the new lane. The photo shows theconstruction of a section of the strip footing for a newretaining wall. The newly cut slope on the edge of the existinghighway was temporarily stabilized with ground anchors

The forming of Lam TeiInterchange is anothermajor component of theS o u t h e r n S e c t i o nC o n t r a c t . T h einterchange connectsDeep Bay Link to Route3 in the east and TuenMun Highway in thewest, via the Yuen LongHighway. The photoshows the forming of theeast and west-boundslipways which connectsto the direction of Route3 near Nai Wai E��F

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Erection of complicated falsework provisionprepares for the construction of theslipways crossing-over Yuen long Highway.Note also the temporary traffic diversionarranged to facilitate the carrying out of theconstruction works in various phases

A set of launching gantryused to lift and erect theprecast segments for theconstruction of the viaduct.The section of 800 m-longviaduct as shown in thisphoto is the east-boundcarriageway finally joins theRoute 3 via Yuen LongHighway


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Close up of the launching gantry underoperation as seen in early 2005 with thebuildings of the private residential estate inLam Tei forming a picturesque background

View of the precast segment handling yard with theeast and west bound carriageways of interchangeheading to the main line of Deep Bay Link

Another view of the segment handling yard withthe main line of Deep Bay Link at the background.Besides the receiving of the carriageway comingfrom Lam Tei Interchange, the exceptionally wideportal beam of the main line (in centre of photo)also provisioned for an outlet for slipwaysentering into Castle Peak Road in future

A set of gigantic-size portal with pier-headsegment on top near the terminal sectionbefore joining into Lam Tei Interchange

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Rows of portal frames running across Castle Peak Road(outside photo on left) before joining into Lam TeiInterchange. The maximum width of the carriageway at thissection is totally 8 lanes, with dual 3-lane entering into theinterchange and dual single-lane provisioned for a futureoutlet leading into the existing Castle Peak Road

Construction of a section of viaduct on the side of the CastlePeak Road in balanced-cantilever arrangement using cast-in-situ method. Two sets of traveling formwork were provided ateach end for the casting of the box-section deck

Panoramic view of the adjoining sections between the Deep Bay Link Northern andSouthern Sections. Complicated environment along the road alignment can be clearlyobserved within this rural background, in particular the crossing over of importanttransportation lines including tracks of the West Rail and the Light Rail Transit, the busyCastle Peak Road, and other associated ground traffic interchanging points

View on the deck levelstationed with a launchinggantry preparing for thereposi t ion ing to a newlocation for the constructionof a new viaduct section


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An astonishing view as taken in March 2005 at the meeting point of the four major slipways from both directions crossing each other in the mid-wayof Lam Tei Interchange

The construction of the slip road entering from east-bound direction of Yuen Long Highway (left) into Deep Bay Link (right). The buildings on the backgroundare located in the area of Fu Tei, Siu Hong and Lam Tei as positioned from the left to the centre of photo

The overview of the east-bound section of Lam Tei Interchange from the falsework platform erected for the construction of the cross road alongYuen Long Highway

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The slip road inlet enteringYuen Long Highway fromLam Tei Interchange headingto Fu Tei direction. The extralane and the road shoulder atthe left side of highway arenewly formed and re-alignedusing land-filling supported byretaining structure during thewidening process

O v e r v i e w o f L a m T e iInterchanging merging intoYuen Long Highway asviewed from Fu Tei

Panoramic view of thecompleted carriageway onvarious deck locations atLam Tei In terchangebefore its handing over on1 July 2007

the separating land gap between ngau hom shek and ha deep...

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