Schèma déltail d'un dallage et types de planchers dalles avec condition d'utilisation | cours génie civil - cours, exercices corrigés et videos. See more. cours plancher et études de planchers à corps creux - pdf . schèma déltail d'un dallage et types de planchers dalles avec condition d'utilisation. Le Site Numéro 1 Du cours et exercices de Génie Civil Page ://www.
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In the known embodiments, each side member is constituted by two superposed U-section plates so as to form a hollow body, Tune section plates U extending under the plancher a corps creux and the other sheet extending above the floor and the ends of the lateral wings of each of the U-section plates being welded to the sheet metal of the floor, each rail comprising a bent region.
This bent region is usually located at the front of the spar, in the curved connection zone upwardly between the floor and the bulkhead of the vehicle. This area is under great stress especially in a frontal impact of the vehicle.
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To allow beams to resist these stresses, a known solution is to use for both section plates U, a relatively large sheet thickness. However, this solution has the disadvantage of increasing the mass and cost of rails and thus the vehicle. The purpose of the present invention is to overcome the disadvantages of the above solutions.
This object is achieved according to the invention by a motor vehicle floor comprising two rails arranged symmetrically with respect to plancher a corps creux longitudinal axis of the vehicle, each rail consisting of two U-section plates superposed to form a hollow body, one of U section plates extending under the floor and plancher a corps creux other sheet extending above the floor and the ends of the lateral wings of each of the U-section plates being welded to the sheet metal of the floor, each rail comprising a bent region, characterized in that the upper base of the U-shaped sheet metal section which extends above the floor, present in the bent region and only in this zone at least one reinforcing rib.
The reinforcing rib is for example made by bending sheet metal.
File:Dalle nervurée en corps creux avant bétonnage, Tunisie, 2017.jpg
Thus, the rib extends only in the bent region which is the most stressed by the constraints. This arrangement makes it possible both to reduce the thickness of the sheet of the plancher a corps creux and the ground since the developed surface of the sheet is increased only in a small portion of the length of the spar.
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Preferably, the base of the upper U-section plancher a corps creux of the beam present in said bent region two longitudinal ribs. In one embodiment, the two ribs are situated respectively on the two edges of said base.
Châssis de véhicule — Wikipédia
In a preferred embodiment, said bent region plancher a corps creux situated at the front of the longitudinal member in the curved connection zone upwardly between the floor and the bulkhead of the vehicle. In one embodiment, the height of the U-section of the sheet, the upper base has the or said ribs gradually decreases from the rear toward the front of said bent region.
According to another feature, the wings of each of the U-section plates are bordered laterally by a horizontal lip which is welded to the floor. Project plans called for the new levees to be offset plancher a corps creux the existing levees and increasing height to elevation Since geosynthetic reinforcement is needed below the levee and during early phases of construction, finding a reinforcement supplier was a high priority.
Benefits In the end, six roll lengths were produced to optimize material efficiency.
Plancher a corps creux provided an option to over excavation and replacement of existing site soil which resulted in a significant cost and time savings. In conclusion, the geotextiles provided an economical and viable design and construction option for the WBV levee improvements.
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