BE521925A

BE521925A -

Info

Publication number: BE521925A
Authority: BE
Priority date: 1953-06-13
Also published as: FR1083138A

Description

       

  CORPS DE CONSTRUCTION A ARMATURE EN TOLE EN PARTICULIER POUR PUITS ET GALERIES

DE MINES ET PROCEDE DE FABRICATION.

  
Des corps de construction, en particulier des plaques et des poutres, fabriqués au moyen de matières de charge ou d'addition telles par exemple que du sable, du gravier, des scories, cendres, pierres ponces naturelles et artificielles, farine de bois, tourbe, paille ou analogue en combinaison avec des liants, tels par exemple que du ciment, de la chaux, du gypse, des bitumes ou analogues, regoivent fréquemment, pour augmenter leur résistance, des armatures, le plus souvent sous forme de tiges d'aciers rondes, toiles

  
en acier ou analogues. Pour réaliser une économie de poids, on a également utilisé comme armatures des tôles minces lisses ou perforées. Pour l'obtention des résistances les plus élevées, ces armatures ne suffisent pas dans de nombreux cas d'application, et un retour aux armatures à tiges de fer rondes aurait pour conséquence dans ces cas une augmentation notable de la section et du poids du fer, et par conséquent du prix de la construction.

  
Dans les corps de construction connus jusqu'à présent, munis d'armatures en tôles lisses ou également perforées, se présente l'inconvénient que l'armature, en cas d'apparition éventuelle d'une pression latérale, favorise une séparation ou un cisaillement du corps de construction à hauteur de l'armature. La cause doit en être recherchée dans le fait que la surface d'adhérence entre le métal et le corps de construction est trop petite et que le corps de construction est en outre divisé par l'armature de tôle. On a également tenté de perforer les armatures de tôle pour obtenir de cette façon une liaison entre les parties du corps de construction disposées de part et d'autre de l'armature. Mais de cette manière, l'armature en tôle est de nouveau affaiblie.

  
En conséquence, conformément à la présente invention, on propose un corps de construction constitué de matières de charge et de liants dont la



  CONSTRUCTION BODY WITH SHEET FRAME IN PARTICULAR FOR WELLS AND GALLERIES

OF MINING AND MANUFACTURING PROCESS.

  
Building bodies, in particular plates and beams, made from fillers or additives such as for example sand, gravel, slag, ash, natural and artificial pumice stones, wood flour, peat , straw or the like in combination with binders, such as for example cement, lime, gypsum, bitumens or the like, frequently receive, to increase their strength, reinforcements, most often in the form of steel rods round canvases

  
made of steel or the like. To save weight, thin smooth or perforated sheets were also used as reinforcements. To obtain the highest strengths, these reinforcements are not sufficient in many application cases, and a return to reinforcements with round iron rods would result in these cases in a notable increase in the section and weight of the iron. , and therefore the price of construction.

  
In the construction bodies known until now, provided with reinforcements made of smooth or also perforated sheets, there is the drawback that the reinforcement, in the event of possible appearance of a lateral pressure, promotes separation or shearing. from the construction body to the height of the reinforcement. The cause should be sought in the fact that the adhesion surface between the metal and the construction body is too small and the construction body is further divided by the sheet reinforcement. An attempt has also been made to perforate the sheet metal reinforcements in order to obtain in this way a connection between the parts of the construction body arranged on either side of the reinforcement. But in this way, the sheet metal reinforcement is again weakened.

  
Accordingly, in accordance with the present invention, there is provided a building body consisting of fillers and binders whose

Claims

essential feature is that the sheet metal plate serving as reinforcement and adapted to the shape of the building body is profiled. This results in the bonding surfaces between the sheet metal reinforcement

and the material of the construction body are advantageously increased, so that separations or shearing of the construction body in the event of bending stresses are avoided.

The moment of resistance of the metal sheets is also increased by the profiling, particularly when the profiles according to the invention are arranged perpendicular to the bending plane. In this way, the profiles increase the resistance of the construction body to bending and buckling compared to the flat plate reinforcements used heretofore.

This results in the possibility of a manufacturing process of a new kind owing to the fact that it is no longer necessary to introduce the metal plates inside the construction bodies in the manner of the usual reinforcements, but that , according to the invention, the construction body can be stamped on the sheet metal plate disposed below, during its manufacture. The sheet metal frame thus comes to be disposed on an outer face of the construction body.

Construction bodies fitted with sheet metal plates, in accordance with

to the spirit of the invention, are suitable, because of their very high strengths, particularly well for example for use in mining consolidations, in the construction of tunnels, dikes and other foundations. As a special case, mention may be made of their use as shuttering plates in the construction of mine galleries. The bridging of the advancement against the collapsing walls is carried out constantly at the immediate height of the advancement. The shuttering plates used for bridging and resting on arched parts or on abutments are also protected against any eventuality during the blowing of rocks necessary for a new advancement. In these cases, shards of stone are frequently thrown against the already mounted formwork plates, causing the affected plates to rupture.

or are holed. This drawback is particularly avoided in building bodies mounted in the form of shuttering plates, and pressed onto a profiled sheet plate, because the latter, used as a layer

base, also rejects stone shards more easily than the load material of the building body could.

Several embodiments of the object of the invention are shown in section in the drawing by way of example.

Fig. 1 shows a construction body of rectangular section provided with a profiled sheet metal frame incorporated therein;

Figs. 2 to 4 show various other profiles of a sheet metal reinforcement on which the construction body is pressed during its manufacture.

The profiles extending perpendicularly to the bending plane B-B are formed, in the embodiments according to Figs. 1 to 3 by cross members 5 which are either welded to the sheet metal plates 6 (Fig. 1) or formed by the correspondingly curved sheet metal plates. (Figs. 2 and 3). The ends of the sleepers may be in the form of rail heads. or a shape close to T. In FIG. 4 shows a construction body with an outer reinforcement of corrugated sheet metal, which can be manufactured in a particularly simple manner.

CLAIMS.

1. Construction body provided with sheet metal reinforcements made up of fillers and binders, in particular for mine shafts and galleries, characterized in that the sheet metal plate (6) serving as a reinforcement and appropriate to the shape of the body construction, is profiled. 2. Construction body according to claim 1 characterized <EMI ID = 1.1>

ment to the bending plane.

3. A method of manufacturing a building body according to claims 1 and 2 characterized in that a sheet metal plate (6) is not incorporated into the building body, but in that the latter is pressed onto it.