FR3109596A1 - Method of erecting a temporary shoring tower - Google Patents

Abstract

The shoring tower has several floors, with a top floor (53), intended to temporarily support a working and circulation platform (14), serving as formwork. Collective protection is installed on each lower floor below the top floor (53). From the top floor intended to be just below the top floor (53), the formwork (14) of the top floor (53) and temporary collective protection (15) of this top floor (53) are mounted. for the installation of the formwork (14), the collective protection of the top floor can be installed by a single operator. Abstract figure: Figure 3

Description

Method of erecting a temporary shoring tower

In the field of building and public works, known as BTP, we are used to erecting temporary or temporary structures, that is to say either scaffolding or shoring towers.

Scaffolding, that is to say temporary structures for working at height, is above all intended so that the operators who are mounted and placed on it can easily work on an existing structure, to be modified or restored. The operators work from the scaffolding. Scaffolding is equipped with collective protection elements that serve both for assemblers and users.

A shoring tower is a temporary structure for the recovery of efforts. It differs from a scaffolding in that it is designed so that, at its top, the tower erection operators create a platform for other operators to work on or move around on, serving as a slab formwork in concrete. As a platform, we can therefore consider a formwork or decking, consisting of a series of beams on which are placed plywood boards on which is then poured a concrete slab. You may also want to do without the beams and pour the concrete on a formwork with only a prefabricated plate or panel.

As during the assembly of the shoring tower, it is essential that the operators responsible for carrying out the formwork are protected and do not risk falling from the top of the tower.

While, during the assembly of the shoring tower, the operators are protected by collective protection elements, that is to say by guardrails, at the top of the tower, until today, the operators protected themselves individually.

Personal protection involves the use of a harness and/or harness that the operator attaches to a rope – called in the construction industry “lifeline” – or to a ballast firmly attached to the temporary structure.

The use of a harness is a constraint that the plaintiff wanted to eliminate.

PRESENTATION OF THE INVENTION

To this end, the invention of the present application relates first of all to a method of mounting a temporary shoring tower of several floors, with a top floor, intended to temporarily support a work and circulation platform, serving formwork, process according to which a collective protection is installed on each lower floor below the top floor, process characterized in that, from the last floor intended to be just below the top floor, we mount the formwork of the top floor and a temporary collective protection of this top floor for the installation of the formwork.

The inventive step involved in the process of the present application resides in the boldness of having dared to propose installing collective protection at the top of a shoring tower for the users of the platform, directly from the tower shoring to benefit from the protection provided by the elements of the tower.

While we were able to proceed in this way on scaffolding, we had always been reluctant to do it on a shoring tower which has the particularity of not being linked to any existing structure. A shoring tower is an isolated structure and this is what has always deterred men in the construction industry from wanting to proceed on shoring towers as on scaffolding.

In the preferred implementation of the method of the invention, to mount the collective protection of the top floor, comprising tubular shafts, with a slide in each shaft, and telescopic rails, the shafts are hung at the top of the tower, at least one rail is attached to the two slides in the low position, of the two barrels of each pair of adjacent barrels, said two slides are lifted one after the other in their barrels and they are blocked there in the guard position body.

Note that a single operator is sufficient to install the collective protection.

We will also notice that the heddles must be telescopic since the slides are raised one after the other. After lifting the first slide, the two ends of the healds are therefore at different heights, before being horizontal after lifting the second slide.

Advantageously, two heddles are attached to the two backstages of each pair of adjacent barrels.

The shoring tower having a polygonal horizontal section, a shaft is hung on each corner post of the said top floor.

It may be advantageous to mount several elementary shoring towers side by side and then to assemble them into said temporary shoring tower supporting said platform formwork, precisely to constitute a larger formwork surface.

The process of the invention has been presented but the invention obviously also relates to a temporary shoring tower with the collective protection of the top floor mounted according to the process of the invention.

PRESENTATION OF FIGURES

The invention will be better understood using the following description of the preferred implementation of the method of the invention for mounting a temporary shoring tower, on which

Figure 1 is a perspective view of the tower, after a first phase of mounting the collective protection on one side of the tower, the two slides in the low position;

Figure 2 is a perspective view of the tower of Figure 1, one of the two slides in the high position;

Figure 3 is a perspective view of the tower of Figure 1, the two wings in the high position and the top floor in place;

Figure 4 is a perspective view of the shaft of one of the wings of the tower of Figure 1 and

Figure 5 is a front view of the mounted guardrail of the collective protection part of the tower of Figure 3.

It should be noted that the figures expose the invention in detail to implement the invention, said figures can of course be used to better define the invention if necessary.

DETAILED DESCRIPTION OF THE INVENTION

The temporary shoring tower represented in the drawing, here with a square horizontal section, comprises, in this case again, four floors 1-4 all provided with collective protection, consisting of guardrails 5, on the four sides.

It goes without saying that the invention applies just as well to towers having only one floor below the top floor which will be discussed below and to towers of another polygonal horizontal section. .

The constitution of the tower at the level of these four lower floors and its railings will not be developed, being classic and therefore perfectly known to those skilled in the art. That it is only specified that it comprises peripheral corner posts 6-9 in one or more elements, smooth 10, integral parts of the guardrails, fixed to the posts by means of rosettes and clamps referenced together 11 on the figures. Other means of assembly can obviously be envisaged by those skilled in the art.

It will be noted that floors 1 and 3 of the tower of figures 1-3 include a light platform that can support a fitter 12, as is the case with platform 13 of the third floor 3.

The lower floors 1-4 of the shoring tower having been mounted, the fitter 12 will mount the top floor 53, with its platform 14 and the temporary collective protection 15 of this top floor (FIGS. 2, 3), in l species a peripheral protection.

A guardrail 16 is thus mounted at the head of the tower on the periphery of the top floor on each side of the tower, between two adjacent posts of the tower between posts 7 and 8 in Figures 2 and 3.

More particularly, and in the example illustrated, each guardrail comprises two identical tubular shafts 17, 18 and two identical smooth 19, 20.

A shaft 17, 18 clings to a post of the tower, in the standard way, by two clamps 21, 22, at the end of two fingers 23, 24 fixed to the shaft and hanging on rosettes of the posts 7, 8 thanks to to keys 25, 26, respectively.

In each barrel 17, 18 is slidably mounted a slide 27 whose position in the barrel is determined here by a captive pin 28 of the strut type, one strand 29 of which is introduced into one of the holes 30 drilled in the slide. Devices 31 for hooking the heddles are fixed on the slide 27. These are rosettes shaped to receive clamps 32 fixed to the ends of the heddles 19, 20 and secured to the rosettes 31 by keys 33 (FIG. 5).

A support 34 is also fixed on the slides 17, 18 to hold a plinth 35 there. of the two shafts of the same guardrail one after the other, the temporary collective protection being installed by a single fitter.

The sliding heddles can be deployed over a range of determined lengths, they are provided with a system to prevent them from opening and the two tubes of the heddles sliding one inside the other may not turn one in the other. the other by perfectly conventional means.

The assembly of a guardrail 16 of the collective protection of the top floor will now be discussed.

From the last floor 3, intended to be just below the top floor 53, fitter 12 mounts the collective protection 15, guardrail 16, by guardrail then the formwork of the platform 14.

To mount each guardrail 16, the fitter 12 hooks the two peripheral tubular shafts 17, 18 with the clamps 21, 22 and the keys 25, 26. He then hooks, the slides 27 being in the low position, the smooths 19, 20 to the rosettes 31 behind the scenes using the pliers 32 and the wedges 33 (FIG. 1). Then he raises a first slide 27 of the shaft 18 to the desired height, the healds 19, 20 then deploying (FIG. 2), before raising the second slide 27 of the shaft 17 to the same height (FIG. 3).

Then the fitter 12 blocks the slides 27 of the two shafts 17, 18 in the guardrail position using the pins 28.

The fitter 12 has therefore mounted the guardrails 16 alone.

Claims (8)

Method of erecting a temporary shoring tower of several floors (1-4), with a top floor (53), intended to temporarily support a work and circulation platform (14), serving as formwork, method according to which a collective protection (5) is installed on each lower floor (1-4) below the top floor (53), a process characterized in that, from the last floor (4) intended to be just below the top floor (53), the formwork (14) of the top floor (53) is mounted and a temporary collective protection (15) of this top floor (53) for the installation of the formwork (14 ). Assembly method of claim 1, according to which for mounting the collective protection (15) of the top floor (53), comprising tubular shafts (17, 18), with a slide (27) in each shaft, and smooth telescopic (19, 20), the drums (17, 18) are hooked at the head of the lathe, at least one smooth (19; 20) is hooked to the two slides (27) in the low position, of the two drums (17, 18) from each pair of adjacent barrels, said two slides (27) are lifted one after the other in their barrels (17, 18) and they are locked there in the guardrail position (16). Assembly method according to Claim 2, in which the healds (19, 20) are telescopic. Assembly method according to one of Claims 2 and 3, according to which two healds (27) are attached to the two slides (27) of each pair of barrels (17, 18). Assembly method according to one of Claims 1 to 4, according to which, the shoring tower having a horizontal, polygonal section, a shaft (17; 18) is attached to each peripheral corner post (6-9) of said top floor (4). Assembly method according to one of claims 1 to 5, according to which several elementary shoring towers are mounted side by side and then assembled into said temporary shoring tower supporting said platform formwork (14). Assembly method according to Claim 2, in which a plinth (35) is fixed to the guide rails (17, 18). Assembly method according to claim 2, according to which the slides (27) of the barrels (17, 18) are locked in the guardrail position by means of pins (28).