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EQUIPEMENT EN DRAGLINE
Matériel didactique : craie de couleur
Objectif opérationnel : A la fin de la leçon, l'élève sera capable d’employer l'équipement en dragline.

a) Révision

Quel rendement que la benne preneuse indique difficile ?

a) Révision

La benne preneuse indique difficile un rendement moyen.

b) Motivation

Quel équipement peut-on donner à un tracteur ?

b) Motivation

On peut donner à un tracteur, l'équipement en dragline.

c) Annonce du sujet

Qu'allons-nous étudier aujourd'hui ?

c) Annonce du sujet

Aujourd'hui, nous allons étudier : L'équipement en dragline.

Analyse

Que signifie R.E ?

Analyse

EQUIPEMENT EN DRAGLINE

2.6.1. DESCRIPTION

2.6.1. LES CARACTERISTIQUES DES PELLES DRAGLINES

  • Capacité du godet ;
  • Rayon maximal d'excavation : R.E.

Il dépend beaucoup de l'habilité du conducteur qui peut lancer le goder plus au moins loin, on admet généralement en moyen qu'on atteint le 3/4 de la portée de la flèche.

  • Rayon maximal de déchargement (RD) ;
  • La profondeur d'excavation (P.E) ;
  • La hauteur maximale de déchargement (H.O).

2.6.3. EMPLOIS

Les utilisations les plus courantes sont :

  • Excavation en terrain meuble ou sous l'eau avec ou sans mise en remblais de part et d'autres ;
  • Chargement en trémie ;
  • Dragage en rivière ou extraction des matériaux (sable, gravies) sous l'eau ;
  • Creusement des canaux.

La pelle peut travailler soit perpendiculairement, soit parallèlement à l'axe du canal. C'est l'emploi fréquent de cet engin.

La capacité du godet est variable, on peut pour les gros engins aller bien au-delà.

L'inconvénient principal de la dragline est l'imprécision de son déchargement.

2.6.4. RENDEMENT

Assez variable suivant les terrains, la longueur de la passée nécessaire pour emploi, le godet etc.

On forcera de remplir le godet par une passée de l'ordre 2 à 4 fois, sa longueur, on attendra disendément de l'ordre de 0,7x celui de la pelle équipée en butte travaillant dans la même condition.

Citez 2 caractéristiques de l'équipement dragline ?

Les 2 caractéristiques de l'équipement dragline sont :

- La capacité de godet ;

- Rayon maximal d'excavation.

MessagesTimelineExceptionsViews7RouteQueries36Models48GateSessionRequest
8.1.28PHP Version135msRequest Duration6MBMemory UsageGET lessons/{id}/{slug}Route
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