DD212279A1 - DEVICE FOR UNDERLOCKING BRIDGE ELEMENTS - Google Patents

Abstract

The invention relates to a device for clamping of bridge elements, which is characterized in that a cross-beam, are attached to the tie rods of the clamping system, via hydraulic cylinders, which are held by a transverse frame u. be supported by special attachment points on the bridge elements, simple or stepwise pressed down and locked by additional support struts in the intended location.

Description

a) Title of the invention

Device for clamping bridge elements

b) Field of application of the invention

The invention relates to βΐηθ device for clamping of bridge beams, which consist of individual elements. Dia device allows use of existing Grundelamente- the temporary bridge construction Spannspannen- or iragfähigkeitserhöhung the Brückenüberbautan.

c) Characteristic of the known technical solutions

Undervoltages in the form of explosive devices under structural members have long been known in bridge and steel construction. In temporary bridge construction, however, such a solution is usually not possible because a blasting plant would be a hindrance during the rolling of a Brückank Komplaktes and only subsequently grown 7 / ground. However, this requires a Hachspannung of the explosive plant to compensate for the sag of the bridge, which is created by the game in the coupling points of the structural elements. Sin such retightening is previously known by hydraulic Prassen or by tightening Spannme mats or turnbuckles in Sprengwerklängsachse. In this case, however, the length of the clamping paths technical limits set, which are insbesondera in temporary bridge construction determined by the accessibility and achievable by manual operation forces. Sin undermining in front of the Sinrollan would require such a complicated blind construction, so this method is not used.

d) The aim of the invention

It is the object of the present invention to provide a post-tensioning untar-tensioning system for bridge girders which allows for a span-width or a load capacity increase or both. Dia required components daza should be able to be attached during or before the rolling on Brückanüberbaa and must not make any additional demands on the Varrollkonstruktion or other auxiliary installation structures *

e) Presentation of the essence of the invention

Dia undervoltage consisting of individual bridge elements temporary bridges is essentially achieved in that a cross-beam, are attached to the tie rods of Spannsystain, via hydraulic cylinders, which are held by a transverse frame and supported by special attachment points on the Brücksnelementen, simple or stepwise pressed down and locked by additional support struts in the intended position *

f) Export certificate

With reference to an exemplary embodiment, the device for clamping bridge elements is to be described in more detail

Pig, 1 dia Front view of the lower tension system Pig · 2 shown the device in two tension stages.

Sine basic requirement for the cultivation of such a device is that at dan provided attachment points of the undervoltage additional Befastigungspunkte 5 »5 '

be taken into account at the bridge elements 6,6 '.

In Ausfuhrungsbeiapiel these are extended connecting pin of the bridge elements.

Now, a tensioning operation in the first tensioning stage is to be described in more detail. For this purpose, two hydraulic power cylinders 4 with Gelsnkaugen 9 are pushed onward by means of elongated Qbergart connecting bolts 8.

Dia working cylinders are laterally stabilized by a stiffened Querrahaen 1. The piston rod heads 10 of these cylinders 4 "which are also provided with hinge eyes 9 ^r , attack via pins 11 on a cross traverse 2. This cross-beam 2 represents the inflection point of the tensioning system "and takes up the necessary tie rods 3, 3 '. If the working cylinders 4 are now extended, the cross-beam 2 is pressed down and the tension rods 3, 3' of the tensioning system are pretensioned, iTach Reaching the end position of the Arbsitszylinders 4 7 / earth additional Stuts struts 7 between the extended üntargurtverbindungsbolzen 12 of a bridge element 6 and attached to the Q tier tr averse 2 pin 11 to _o Then dia working cylinder 4 can be relieved and the support struts 7 take over the power transmission in The working cylinders 4 can now be withdrawn from the extended Obergurtverbindungsbolzen 3 and unscrewed from the piston rod heads 10. "If the bias of the bridge construction is not yet sufficient, the working cylinders 4 remain attached to the quartz cross 2. However, the hinge eyes 9 of the cylinder feet are now on the extended Unta Rgurtverbindungsbolzen 12 of the adjoining Brückanelementes 6 'attached. After starting the working cylinder 4, the now loose support struts 7 can be removed and the working cylinders 4 are extended to the necessary clamping length.

Afterwards support struts 7 'can be installed again according to the final clamping length. The working cylinder 4 are then relieved and removed, or remain on the built-in billing «With this proposed technical solution ain sprengwerkähnliches underride system is realized, which by simple means a Spannweiten- or capacity increase for temporary bridges allows» By gradual clamping possibility is a good adaptation to the Baubedingongan guaranteed and the components used can be relatively small dimensioned with sufficient stability *

Claims (1)

claim Apparatus for subspans of assembled from individual elements temporary bridges, characterized in that a cross-beam (2) on the tie rods {3,3 '), the clamping system are mounted (by means of hydraulic cylinder 4) i is the (by a cross frame 1) are held and are supported on the bridge elements (S, 6 ^T ) via special attachment points (5.5 ^T ), pressed down in a simple or stepwise manner and locked in the intended position by additional support struts (7a7 ^! ) » Häerzu ^ _Seiien drawings