{"id":6674,"date":"2019-07-03T16:07:53","date_gmt":"2019-07-03T14:07:53","guid":{"rendered":"http:\/\/www.maffeis.it\/?post_type=avada_portfolio&p=6674"},"modified":"2022-04-20T11:54:39","modified_gmt":"2022-04-20T09:54:39","slug":"jamarat-bridge","status":"publish","type":"avada_portfolio","link":"https:\/\/www.maffeis.it\/index.php\/portfolio-items\/jamarat-bridge\/","title":{"rendered":"JAMARAT WALKWAY"},"content":{"rendered":"

JAMARAT WALKWAY<\/span><\/p>\n

Makkah | Saudi Arabia<\/span><\/p>\n<\/div><\/div><\/div>

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YEAR<\/span><\/h6>\n<\/div>
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2009<\/p>\n<\/div>

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STATUS<\/span><\/h6>\n<\/div>
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Completed<\/p>\n<\/div>

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TYPE<\/span><\/h6>\n<\/div>
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Pedestrian Bridge<\/p>\n<\/div>

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SERVICE<\/span><\/h6>\n<\/div>
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Special Structures | Tensile Structures | Bridges & Viaducts<\/p>\n<\/div>

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FINAL CLIENT<\/span><\/h6>\n<\/div>
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Riyadh Municipality<\/p>\n<\/div>

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CLIENT<\/span><\/h6>\n<\/div>
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Ali Tamimi Sons Co.<\/p>\n<\/div>

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ARCHITECT<\/span><\/h6>\n<\/div>
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Dar Al-Handasah (Shair and Partners)<\/p>\n<\/div>

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ENGINEER<\/span><\/h6>\n<\/div>
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Maffeis Engineering SpA<\/p>\n<\/div>

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MATERIALS<\/span><\/h6>\n<\/div>
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Steel | Cables | Concrete | PTFE<\/p>\n<\/div>

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SPAN<\/span><\/h6>\n<\/div>
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950 m<\/p>\n<\/div>

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Gallery<\/span><\/a><\/div>
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Dar Group was commissioned to provide design and construction supervision of a new, multi-level bridge structure that accommodates and eases the flow of 3 million worshippers during a single daylight period. The resulting Jamarat Bridge is a superior structure formed of four platform levels.
\nThe deck floor is made of parallel box girder frames at 9 m spacing, while the deck girders are built with glued, match cast, precast concrete segments, using the free cantilever construction technique. The prestressing of the girders was made possible by internally bonded prestressing cables. Top slab prestressing tendons are anchored in the webs at the face of each segment from one side and at the face of the back columns from the other. Bottom slab cables (continuity prestressing) are anchored in bottom slab blisters.<\/p>\n<\/div>

Adjacent deck frame segments are stitched with 50 cm wide in-situ concrete and transversally stressed at cross diaphragm locations (at 12 m spacing) to form an orthotropic floor system and provide a high level of redundancy and load shedding effect. The piers and foundations were constructed using in situ reinforced concrete, except for the outer columns which were prestressed to cater for the large tension forces.
\nMaffeis Engineering also was commissioned for four large fabric coverings with the design of the steel, of the cables and the study of the behaviour of the mega structure in certain weather conditions.<\/p>\n<\/div>

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