{"id":5736,"date":"2023-07-07T13:48:39","date_gmt":"2023-07-07T11:48:39","guid":{"rendered":"https:\/\/www.bachy-balineau.com\/offer-portfolio\/ouvrage-dart-de-ravine-la-source\/"},"modified":"2023-07-13T15:04:07","modified_gmt":"2023-07-13T13:04:07","slug":"ouvrage-dart-de-ravine-la-source","status":"publish","type":"avada_portfolio","link":"https:\/\/www.bachy-balineau.com\/en\/offer-portfolio\/ouvrage-dart-de-ravine-la-source\/","title":{"rendered":"Ravine La Source bridge"},"content":{"rendered":"

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The project<\/p><\/h2><\/div>

The Guadeloupe Departmental Council<\/a> initiated the reconstruction of the Ravine La Source bridge on the RD5 at Trois Rivi\u00e8res. This was an ageing structure that no longer met current seismic standards.
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The planned structure comprises two traffic lanes with a span of 23 m. The initial plan was to base each abutment with 8 bored piles. However, this solution was not compatible with the site’s access conditions.<\/p>\n

Following proposals from Bachy Balineau, the main contractor GTA proposed a more suitable foundation system, in which bearing capacity is provided by a group of 16 micropiles<\/a> per abutment. These are type III micropiles, with a borehole diameter of 250 mm and a depth of around 12 metres. They are equipped with a main tubular reinforcement (diameter 139.7 mm; thickness 12.5 mm) and an inertia reinforcement at the head (diameter 219.1 mm; thickness 12.5 mm), over a height of 5 m.<\/p>\n

To meet the requirements of the Eurocodes, additional micropiles (1 per abutment) were installed prior to the foundations of the structure, and were subjected to loading tests.<\/p>\n

It should be noted that the old structure was demolished beforehand and that the drilling platforms, which are relatively cramped, are located almost 5 m below the roadway.<\/p>\n

A 200-t telescopic crane was used to access the drilling platforms and carry out all handling operations.<\/p>\n

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Project owner:<\/span>
\nGuadeloupe Departmental Council<\/span><\/b><\/p>\n

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Main contractor:<\/span>
\nGTA<\/span><\/b><\/p>\n

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Location:<\/span>
\nTrois Rivi\u00e8res (Guadeloupe)<\/span><\/b><\/p>\n

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Period:<\/span>
\n1st semester 2023<\/span><\/b><\/p>\n

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