WO2013064707A1

WO2013064707A1 - Removable bedplate system for mobile factories of prefabricated concrete elements

Info

Publication number: WO2013064707A1
Application number: PCT/ES2011/070827
Authority: WO
Inventors: Juan Miguel Lozano Saiz
Original assignee: Puentes Y Calzadas Grupos De Empresas, S.A.
Priority date: 2011-10-31
Filing date: 2011-11-29
Publication date: 2013-05-10
Also published as: ES2402720B1; ES2402720A9; ES2402720A1

Abstract

The present invention relates to a prefabricated structural system for building removable bedplates which can be used to manufacture concrete elements, considering that the factories must be mobile, removable and transportable. The prefabricated concrete elements that are the subject matter of the present invention must be capable of withstanding the forces generated by the internal tension of the continuity system in addition to the forces for tensioning the pre-tensioned framework during the normal manufacturing process, said forces being ultimately transmitted to the ground via the entire bottom supporting surface in the case of surface installation, and the ground engaging with the sides in the case of semi-buried and buried bedplates. In addition, for box-girders, the actual internal geometry of the bedplate can be used as an outer formwork for the girders to be manufactured.

Description

REMOVABLE BANKING SYSTEM FOR MOBILE MANUFACTURERS OF PREFABRICATED CONCRETE ELEMENTS

D E S C R I P C I O N

OBJECT OF THE INVENTION

The present invention relates to a prefabricated structural system for building removable benches whose use will be to manufacture prefabricated concrete elements considering that the factories can be mobile, removable and transportable. The object of the invention will therefore be the set of elements that make up the bench as well as its arrangement that allows it to work for the intended purpose. The elements to be manufactured in these benches will be pieces of concrete with passive and / or active reinforcements that in turn may be prestressed and / or posts, with any inscribable geometry inside the bench ("U", double T, drawer, .. .).

To achieve this, the bench must have a geometry that allows, on the one hand the support of the formwork necessary to give the final shape to the element to be manufactured, and on the other, the mechanical capacity necessary to resist the passive or active stresses that the manufacturing process transmit you. This leads to sections of type "U" or similar, with sufficient thicknesses both in base and elevations as well as raised in the extreme areas in which the concentration of tensions may be higher.

In the manufacturing process, all the efforts generated by the weight and thrust of the fresh concrete, as well as the total tension of the cables in the case of prestressed reinforcement must be fully supported by the precast concrete elements object of this invention. , being finally transmitted to the ground by the entire lower support surface in the case of superficial installation and the ground collaborating on the sides in the cases of semi-buried or buried benches.

Therefore, the system object of this invention will be valid both for mobile installations that are superficial and for those that by design are designed to be semi-buried or buried.

BACKGROUND OF THE INVENTION

As is known, to be able to manufacture concrete elements with prestressed reinforcement, it is necessary to have fixed installations (factories) with special foundations to withstand the stresses produced by active steel. This is also necessary, although with less entity, in the case that the elements are only armed where the efforts are generated by the weight and the thrust of the fresh concrete.

Taking into account that in some places it is not possible to install fixed factories and in others it is not economically profitable to do so is why the inventor has developed the present system.

The need to be more competitive by reducing transport costs has led us to design mobile factories, which are located on site until the work is finished, thereby minimizing the cost and logistics of prefabricated parts. This advantage is all the greater the heavier and numerous the pieces to be manufactured.

A fundamental part in the cost of these mobile factories is the foundation of the prefabrication benches, for this, we have designed the proposal object of this invention so that the same elements can be disassembled and transported to different workplaces.

Traditionally, the systems used in mobile factories are designed in their resistant part as metallic structures of greater or lesser capacity depending on whether the parts to be manufactured are pretested or postted. Additionally, a series of formwork are arranged, which are responsible for shaping the concrete until it hardens.

Our system raises the novelty of solving the resistant structure based on removable, transportable and assembled concrete pieces, in some cases fulfilling a double function in terms of also achieving the geometric shape of the finished piece. DESCRIPTION OF THE INVENTION

The resistant scheme for the benches of removable mobile factories consists of a bath type bench, self-resisting operation, formed by elementary pieces assembled together and which can be arranged on the surface, buried or semi-buried. The structural system (segments) consists of different pieces of concrete and steel reinforcements that together form a homogeneous system resistant to the efforts generated in the manufacturing process by the concrete and even by the active steel used in the case of different elements such as beams, drawers, straps ...

It can also serve as a support for the manufacture of elements whose exterior geometry conforms to the shape of the bench, in which case it can fulfill an additional function of external formwork. So that it can be transportable, the system consists of a number of pieces or segments in the form of "U" or similar of a variable width, edge and length according to the need of each type to be manufactured and the size of the mobile factory to be installed.

The pieces, sized for easy handling and transport, have a series of elements that allow their assembly and solidarity operation (tongue and groove, through holes, pods, ...).

Once all the prefabricated "U" shaped pieces, segments or segments are aligned, they are they join each other with some connection system such as post-tensioned active steel housed in the pods or tubes previously placed in the concrete pieces.

Other systems to be used can be based on high-strength bars tested, with passive steel or with any other joining system, leaving the necessary anchors to fix the system on the heads or end pieces of the track. Once the work is finished, you can proceed to release it to separate the entire bench and transport it to a new location. The extreme segments will therefore be special pieces for the accommodation of the necessary elements typical of the cable testing system or continuity system chosen, requiring widening of sections, recesses, steel plates or reinforcement reinforcements, which will be defined according to the parts that are subject to manufacturing on the bench.

DESCRIPTION OF THE DRAWINGS.

To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical realization thereof, a sheet of drawings is attached as an integral part of said description where In an illustrative and non-limiting manner, the following has been represented: FIGURE 1 - Perspective view of several benches of the bench in working position.

FIGURE 2. - Side view of the bench, with part of its elements, including an end end.

FIGURE 3. - Perspective view of the top of the bench. FIGURE 4. - Several possible types of manufacturing on the bench.

and in all of them with the same reference they are called identical elements, among which we distinguish:

(B). - Bench

(bl, b2, ...) .- Dovelas of the bench

(hl) .- height of the dovela

(T) .- bench top element (B)

(h2) .- stop height (T)

(4) .- pipes made in the segments

(5) .- testing bars / cables

(6) .- continuity system anchor

(al) .- interior width of the dovela

(at) .- total width of the dovela

(L) .- length of the dovela

PREFERRED EMBODIMENT OF THE INVENTION.

The present invention relates to a prefabricated structural system for building removable benches whose use will be to serve as a structure resistant and / or mold to manufacture various precast concrete elements.

Depending on the different concrete pieces to be manufactured, the benches (B) will present one or the other profile, but always taking into account that the factories must be mobile, removable and transportable. The benches (B) will be constituted by an adequate number of segments (bl, b2, ....) finished at their ends by two stop pieces (T).

The shape of the segments will preferably be in the form of a "U", of total height (hl), and the interior width (al) will always be less than the exterior width (at), the width of the upper part being the gables of the dovela (ab) given depending on the resistance that the bench must have (B).

The length (L) of the segment is defined so that the total weight of each piece is transportable under favorable conditions.

The segments have, in their interior part, preferably circular pipes, located in both gables of the dovela and others in variable number at the base of the same that will be formed by tubes (5) of material suitable for their function such as plastic or polypropylene inside which the cables / bars responsible for giving continuity to all the pieces will run so that the bench works with the necessary monolithism. To guarantee this effect, the joints can carry out some type of treatment that allows their best work and guarantees a homogenous contact, such as the use of high resistance mortars or the arrangement of tongue and groove.

The top pieces (T) of the bench are constituted by individual concrete pieces, whose inner face coincides with the segments, and then be re-shaped in a way that is necessary to withstand the local efforts that the armature testing system pretesa must transmit to the parts to be manufactured. The stop parts (T) also have anchoring areas of the devices (cables or bars) that give continuity to the whole of the bed. The stop pieces (T) can have a length

(L) different from conventional segments in order to maintain its weight within reasonable values to facilitate transport, and can even be divided into several parts.

The operation of the assembly is as follows: Once all the segments (b 1, h2, ...) are aligned, and the stop pieces (T) are placed at their ends, they are joined together by means of cables / bars active steel (5) that pass through the pipes (4) and that end up attached to the anchoring elements of tesado / destesado (6) located in the outer face of the pieces of stop (T). Once all the elements are placed in this position, the active steel cables / bars (5) are operated with jacks so that the assembly is tightly tensioned, leaving the bed (B) ready for use.

The stresses generated by the tension accumulated in the system (5) plus those produced by the testing of the reinforcement prestressed in the normal manufacturing process must be fully supported by the precast concrete elements object of this invention, being finally transmitted to the terrain over the entire lower support surface in the case of surface installation.

In case of buried or semi-buried benches, the walls of the land will also collaborate in the distribution of efforts. The process of manufacturing and testing of parts within the bench can be carried out by the procedures usually available in the market: tested against suffering beam, displacement of hive beam, postted from boxes, ...

Once the work of the bench (B) is finished, we will proceed to weaning, releasing the anchors (6) in order to disengage all the segments (bl, b2, ..) and the stop pieces (T). All parts will be loaded separately to transport the assembly to a new location, and be able to start the whole process again.

Describes sufficiently the nature of the invention, as well as the way of carrying In practice, it should be noted that the provisions indicated above and represented in the attached drawings are subject to modifications in detail as long as they do not alter their fundamental principles, established in the preceding paragraphs and summarized in the following claims.

Claims

R E I V I N D I C A C I O N E S

I ^a .- REMOVABLE BANKING SYSTEM FOR MOBILE FACTORIES OF PREFABRICATED CONCRETE ELEMENTS characterized essentially by being at least the following elements: Bench (B) Consisting of:

- segments, in adequate number (bl, b2, ....) to reach the required length of the element or elements to be prefabricated and where the shape of the segments will preferably be "U" or similar, of vertical arms of variable width and total height (hl). The interior width of the bench (al) will always be less than the exterior width (at), and the width of the upper part of the gables, of the keystone (ab) will be given depending on the resistance that the bench must have ( B), presenting the segments (bl, b2, ...) on the inside of them some pipes (4), located in both gables of the dovela and others in variable number at the base of the same, inside which they will run the cables / bars of tesado (5) that will give continuity to the system.

- stop pieces (T) located at the beginning and end of the set of segments and that are constituted by individual concrete pieces, whose inner face coincides in measures with the segments, and later grows larger (h2), also presenting anchoring areas in its rear wall that coincide with the exit of the pipes (4) of the slots and which will house the anchoring devices of the active steel cables / bars (5) of the bench. 2 ^a .- REMOVABLE BANKING SYSTEM FOR MOBILE FACTORIES OF PREFABRICATED CONCRETE ELEMENTS according ^to claim 1 and characterized in that the stresses generated by the total tension of the active steel cables / bars (5) of the bed plus those produced for the testing of the reinforcement pretested in the normal manufacturing process they must be fully supported by the segments (bl, b2, ..) and stop pieces (T) being finally transmitted to the ground by the entire lower support surface in in the case of superficial installation and in case of buried or semi-buried benches, the walls of the land will also collaborate in the distribution of efforts.

3 ^a .- REMOVABLE BANKING SYSTEM FOR MOBILE FACTORIES OF PREFABRICATED CONCRETE ELEMENTS in accordance with the first claim and characterized by allowing the function of facing as exterior formwork in the range of prefabricated beam-type beams, endowing as exterior geometry of the beam that corresponding to the internal geometry of the bench itself, with no need other than the internal formwork arrangement, where appropriate, for the finishing of the beam shape.