ES2396291A1 - Successive adjustable lift truck for building bridges. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Cantilever carriage of successive advance for construction of bridges. It comprises in principle a supporting structure that incorporates two main longitudinal trusses joined by a back beam, a central beam and a front lattice, including other elements, as well as pairs of skates, front and rear, through which sits the supporting structure cited on a guide rails during its advance. It is characterized in that the anterior lattice (5) is reinforced by a sturdy bracing beam (10) which is joined to at least one central part of said anterior lattice (5), while at least having the same height. (Machine-translation by Google Translate, not legally binding)

Description

TROLLEY IN SUCCESSIVE ADVANCE FOR BRIDGE CONSTRUCTION The present statement of this OBJECT of the INVENTION invention, as described, express in refers to

the one

successive cantilever carriage for bridge construction that presents greater safety, as well as greater ease of use, allowing loads from the weight of the formwork and the loads due to the concreting process to be transmitted to the previous segments of the bridge under construction of the respective dovela to perform.

It allows

also unclog the panels Y too

move

he formwork allowing in any moment

perform

the section from make it preset.

BACKGROUND

FROM THE INVENTION

Currently, successive cantilever carriages for bridge construction are known which in principle comprise a main bearing structure in which a lattice beam is previously distinguished that compensates for the formwork weight, transmitting the load to the rest of the bearing structure through a series of braces linked to it.

Since said main structure, main truss, rear beam and in general the rest of the referred bearing structure, are also subject to slight deformations due to the mechanical stress they perform, it is difficult to ensure certain technical requirements, especially in terms of regulations security, against said deformations by needing complex second or even third order calculation processes, to meet said technical requirements.

DESCRIPTION OF THE INVENTION

In order to achieve the objectives and avoid the inconveniences mentioned in the previous sections, the invention proposes a cantilever car of successive advance

for bridge construction comprising a supporting structure formed by two robust main longitudinal trusses joined together by a rear transverse beam, another central and an anterior lattice arranged in

a

flat vertical, the which be joins to some sections lateral

outgoing

from the beam cross central through some

suspenders

lateral. The two trusses longitudinal

main

be unite too through others suspenders

central.

In turn, the whole of the supporting structure is coupled and seats, by means of the main longitudinal trusses, on a pair of parallel guide rails by means of pairs of skates, front and rear, which allow to drag said supporting structure to position it cantilever where appropriate as the bridge is made, so that on the bridge section made will be fixed such parallel guide rails to support the whole of the supporting structure.

Starting from this premise, the invention is characterized in that it comprises a robust bracing beam that greatly reinforces the resistance of said anterior latticework subjected to great efforts during the setting of the concrete to perform the different sections of the bridge.

Said bracing beam structure joins the anterior lattice, at least for its central part, covering all of its height and preferably the rear face of such anterior lattice.

This eliminates the straps and different bracing elements that are currently being used, since they have all been replaced by the characteristic preferred bracing beam.

Another feature of the invention is that each pair of skates, front and rear, arranged in correspondence with the respective guide rail, both skates are connected by a characteristic support

elongated in replacement of the classic rear skate tensioner, elongated support that is arranged in parallel with the respective guide rail above it.

In this way, an improvement is achieved in the transmission of an oleohydraulic cylinder that acts on said anterior skate to move the whole of the bearing structure during its advance.

Next, in order to facilitate a better understanding of this descriptive report and forming an integral part thereof, some figures are attached in which the object of the invention has been shown as an illustration and is limited.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1.- Shows a perspective view of the carriage in successive forward overhang for bridge construction, object of the invention. A characteristic bracing beam is highlighted, as well as an elongated support that joins pairs of skates on which the carriage assembly rests to move it along guide rails fixed to the bridge part

done until

that moment.

Figure

2. Sample a view in perspective from the

characteristic beam of

bracing

Figure

3. Sample a view in perspective where be

sample

essentially the bonding from the peers from

skates by

he new elongated support

DESCRIPTION

FROM THE SHAPE FROM REALIZATION PREFERRED

Considering

the numeration adopted in the figures, he

car

in cantilever from Advance successive for building from

bridges is determined from a supporting structure

(one)

comprising in principle two robust main longitudinal trusses (2) joined by a rear transverse beam (3), another central transverse beam

(4)

and an anterior lattice (5) arranged in a vertical plane, which joins some projecting sections (6) of the

central transverse beam (4) by means of lateral braces (7). The two main longitudinal trusses

(2)

are also joined by other cross braces

(8)

and inclined (9).

The front lattice (5) is reinforced by a strong bracing beam (10) in solidarity with the front lattice (5) by its rear face, so that said bracing beam (10) covers at least the central part of the width of the previous lattice (5) having the same height as this one.

The bracing beam (10) basically comprises transverse bars (11) of greater length, short horizontal (12) and vertical bars (13), other short inclined bars (14) and some braces (15), all these elements being joined together by welding, so that transverse bars (11) arranged in the same vertical plane have plates (26) affected by holes (27) to support the bracing beam assembly (10) to the previous lattice (5) by means of fasteners not shown in the figures.

On the other hand, the main longitudinal trusses

(2) of the whole of the supporting structure (1) are coupled and seated on a pair of guide rails (16) by means of two pairs of skates: front (17) and later

(18), which allow said bearing structure (1) to be dragged to position it in a cantilever where it corresponds as the bridge is made, so that such guide rails (16) will be entrusted on the bridge section made set the whole of the supporting structure (1) through the referred skates (17 and 18).

Each pair of skates (17 and 18), seated and driven on the respective guide rail (16), are joined by an elongated support (19) that runs parallel to the respective guide rail (16).

In this way, an improvement is achieved in the transmission of an oleohydraulic cylinder (20) that acts on each front skate (17) to move the whole of the bearing structure (1) during its advance.

5 The elongated support (19) basically comprises two longitudinal profiles (21), a rear cross member (22) and a central cross member (23). In turn, the longitudinal profiles (21) have at their free ends two pairs of ears (24) affected from opposite holes

10 (25) to be able to connect articulately to the respective front skate (17) while the rear cross member

(22) incorporates in its center another pair of ears (24 ') with other holes facing each other (25') to connect articulately to the respective rear skate (18).

Claims (3)

1.-CARRIAGE IN SUCCESSIVE ADVANCE FLAG FOR BRIDGE CONSTRUCTION, comprising a supporting structure (1) that incorporates two main longitudinal trusses (2) joined by a rear transverse beam (3), a central transverse beam (4) and an anterior lattice (5), also including a pair of skates: front and rear, through which the supporting structure sits on parallel guide rails to move it during its advance, characterized in that the anterior lattice (5) is reinforced by a robust bracing beam (10) that is at least integral to such a central part of said anterior lattice (5), at the same time as it has at least the same height . 2.-SUCCESSIVE ADVANCED CARRIAGE FOR BRIDGE CONSTRUCTION, according to claim 1, characterized in that each pair of skates, front (17) and rear (18), are linked by an elongated support (19) through articulated connections. 3.-SUCCESSIVE ADVANCED CARRIAGE FOR BRIDGE CONSTRUCTION, according to claim 2, characterized in that the elongated support (19) comprises two longitudinal profiles (21), a rear crossbar (22) and a central crossbar (23), counting the longitudinal profiles (21) and their free ends with pairs of ears (24) affected from facing holes (25) to articulate connection to the respective front skate (17) while the rear cross member (22) incorporates in its center another pair of ears (24 ') affected from other facing holes (25') to articulate connection to the respective rear skate (18).