DE2807789A1 - PRE-FABRICATED BRIDGE AND PROCEDURE FOR ITS ERECTION - Google Patents

Description

- "5 -

The Secretary of State for Defense in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland ,, Whitehall, London SWl

Great Britain

Prefabricated bridge and procedures for its construction

The invention relates to prefabricated bridges in modular construction, in particular beveled end units for prefabricated ones Girder bridges and a method for their construction.

The span of prefabricated girder bridges is largely put together in such a way that numerous intermediate units, each of which has a beam on both sides as a carrier for the road surface, at their ends with one another get connected. For small spans and only low loads, the beams can be arranged so that they such bridges form a single, longitudinally extending beam when the bridge is assembled are conventionally known as so-called single-story bridges. Require longer spans and higher load capacity Bridges, which are referred to as so-called two-story bridges, that is, bridges in which each unit a second beam arranged above the other beam in the manner that the bridge is in the assembled state State has a first and a second carrier, each extending in the longitudinal direction, lie on top of one another and are rigidly connected to one another by struts or brackets.

In the case of the two-story bridge, the road surface will be used

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worn from the top of the top girder, with correspondingly there is a considerable distance to the underside of the lower beam, which is approximately at the level of the Underground is located at the ends of the bridge span. Every bridge width of the double-decker bridge is included connected at both ends to an end unit that rests directly on the ground. To gain access or To enable access to their carriageway, these end units are usually designed with a bevel. At this .Type of bridges, however, the problem arises that.3 the Change of inclination at both ends of the steeply sloping end units is an obstacle for certain types of vehicles.

Double-level bridges are usually built in sections on an embankment or bank of the river, the exit bank, and progressively advanced over the distance to be bridged on rollers or rollers located on the exit bank according to the added sections. In this type of bridge-building ₅ This is important aligned the bottom of the lower beam and the underside of the end units to one another and must be continuous to enable advancement of the bridge via the corresponding rolling device. In order to increase the construction speed, it is correspondingly beneficial if the bridge can be laid directly on both banks without digging. End units with a horizontal floor also contribute to this.

Sin way of avoiding the unevenness between the slope of the end unit and the bridge deck is the standardized end units under reduced To connect steepness with the bridge. Although this reduces the obstacle mentioned for certain vehicles,

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Tilt angle

however, there is one associated with this at the bottom of the end units, the difficulty for the rolling device and in many cases time-consuming digging, especially in rocky or stony terrain requires.

The invention provides a joint unit for connecting end units with intermediate units of prefabricated carrier or girder bridges, which have a first device for rigid connection with the intermediate unit, one rotatable second device mounted on the first device for rigid connection to the end unit and a lifting device for pivoting the first and second devices, actuation of which increases the steepness of the upper side the end unit can be varied.

Fastening devices are preferably used to fasten the first and second units in two or more relative positions intended. The fastening devices can have a bolt or tenon, the corresponding Parts of the first and second devices are provided suitable for receiving it.

The lifting device can comprise a hydraulic cylinder provided below the pivot point.

The joint unit is advantageously provided with a connecting device for fastening the first and second devices provided with each other for storage or transport, the connecting device having one bolt and two protruding Has bearing eyes, which are provided on both devices and serve to accommodate the bolts.

The invention also relates to prefabricated beam

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bridges that contain the above joint unit »

The invention also relates to a method for erecting girder bridges from prefabricated units over a span to be bridged from one starting bank to the opposite bank, the following steps having:

a) Insertion and connection of the hinge unit between the last intermediate unit of a bridge arrangement of intermediate units and an end unit;

b) Adjusting the steepness of the top of the end unit with the joint unit in such a way that the Bottoms of the end unit and intermediate units in rolling contact via one located on the exit bank Rolling device can run,

c) advancing the over the joint unit with the intermediate units connected end unit over the rolling device over the distance to be bridged to the end unit is in contact with the opposite bank,

and

d) Adjusting the steepness of the upper side of the transmitter unit with the joint unit depending on the intended one Purpose of use.

The invention is illustrated below using an exemplary embodiment explained in more detail with reference to the drawing; show it:

Figure 1 is a side view of part of an end portion a prefabricated girder bridge with a

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inventive joint unit and

Figo 2 shows three different positions of the end section a prefabricated girder bridge with the joint unit according to the invention,

1 shows an end section of a prefabricated double-deck girder bridge 1, which has conventional intermediate units 2 and end units 3. As mentioned above ₉ , the girder bridge 1 has a girder on each side of the bridge, which supports the road surface (not shown). In FIG. 1, however, only the structure of one side of the bridge is shown schematically for reasons of clarity. The structure of each bridge end is identical, which is why only a section of a bridge end is shown. The bridge 1 accordingly comprises four of the sections shown, which are located on both sides of each bridge end. The intermediate units 2 contain upper beam sections k and lower beam sections 5 _P , the lower beam sections 5 being assembled with struts β, which are connected to the upper beam sections 4 by bolt connections J. The end units 3 have upper carrier sections 8 and lower carrier sections 9.

Between the intermediate unit 2 and the end unit 3, a joint unit 10 connected to both parts is provided. the upper support sections 11, a joint 12 and struts 13. The joint 12 is between two short upper support sections 11 provided, through which the joint unit 10 with the upper support structure of the Bridge is connected. The lower ends of the struts 13 are

connected to the lower support structure via bolt connections 14. A hydraulic cylinder 15 is provided between the lower ends of the struts 13 on Boizen joints 1 € and 17. The hydraulic cylinder 15 acts during operation so that the pin joints Ιβ and 17 are pushed further apart, whereby the end unit J; is rotated relative to the intermediate unit 2 about the joint 12. On this ^T ;. ^f else the slope, the upper support portions 8 varies the end unit 3 of the illustrated comparatively steep rise across any number of intermediate positions to the horizontal position. At the lower ends of the struts, overlapping jaws l8 are provided, which have holes for receiving bolts, with which three predetermined positions of the joint unit 10 can be set, in which the jaws for fastening the joint 12 and for relieving the hydraulic cylinder 15 by bolts can be connected to each other. These predetermined positions correspond to the three positions shown schematically in FIG.

In the first of the positions shown, the lower support sections 9 of the end unit 3 are horizontal and align with the lower support sections 5 of the intermediate unit 2, while the upper support sections 8 of the end unit have a ramp with a steepness of 1: 5 in the approach direction to form the upper support sections 4 of the intermediate units 2. This position is for quick build-up the bridge 1 is extremely favorable in that the bridge is placed directly on unprepared subsoil can be.

In the second position, the upper support section 8 of the end unit 3 has a smaller steepness of 1:10, the lower support section 9 being inclined accordingly is. In this position it is no longer possible

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to build the bridge on unprepared ground ^ since the ground must be inclined to adapt to the underside of the end unit 3 “This position is reduced however, the effect of the hump-like curvature on the joint unit 10 with minimal preparation of the Underground "

In the third position, the upper support section of the end unit J is horizontal and is flush with the upper support sections 4 of the intermediate units 2 in such a way that the hump-like curvature on the joint unit is completely eliminated " The lower support section 9 of the end unit 3 has with a slightly larger increase, so here is a Major subsurface preparation is required before the bridge can be built. This position is suitable therefore particularly suitable for bridges which are built for longer periods of use,

After the bridge has been erected, any of the three positions described can be selected and set; one Later change of the bridge position can be done by lifting the bridge with (not shown) carrier hydraulic cylinders, Preparing the subsoil, setting the Ge = steering unit 10 in the new, desired position and then Lowering the bridge can be carried out »It is preferred that the hydraulic cylinder 15 for the joint unit IO on both sides of a bridge end are operated simultaneously or »coordinated, so that the end units are not subject to torsional stress.

The hinge units 10 are _s Gerenkeinheit wherein a is provided as separate units can be transported for each side of each bridge end. The units can be supported with a connecting bolt 20 during storage.

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which is inserted into corresponding bolt openings which are provided on tabs 21 protruding.

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R e r s e

Claims (1)

-BEETZ-LA [VSPRECHt = BEETZ PATENTANWÄLTE EVlüt-aehen 22 ■> Steinsdorfstrasse 10 Dipi.-ing. r. beetz sen. TEUEFOW (Ο8Θ) 227ΞΟ1 - 22 7244 - S9 591O Dlpl.-Ing. K. LAMPRECHT Tol.e>: s S22Q48 telegram Allpaient Munich Dr.-Ing. R. BEETZ Jr. DIpI.-Phyo. U. HEIDRICH "" 2 ( ο 9O5P also Rochtoanwalt Dr.-Ing, W. TiIViPE Dlpl.-img. J. SIEGFRIED 2Y. Feb. 1978 Requests 1 ") Joint unit for connecting an end unit with an intermediate unit of a prefabricated girder bridge, marked by a first device (11, 13) for rigid connection to the intermediate unit (2), a second second device (11, 13) rotatably connected to the first device for rigid connection with the end unit as a lifting device (15) for pivoting the first and second devices, actuating them to increase the steepness the top of the end unit can be changed xsrerden » 2 "Joint unit according to claim 1, characterized by a fastening device (18, 19) for mutual fastening of the first and second devices in at least two / one relative positions ₀ 3 "Joint unit according to claim 2, characterized in that that the fastening device has a bolt and portions (18, 19) of the first and second devices which are intended to accommodate the bolt * 4 ο Joint unit according to claim 3 _S, characterized in that the lifting device comprises a hydraulic cylinder (15) provided below the joint (12) " 293- (JX / 5156 / O5) -SFBk 5. Joint unit according to claim 1, characterized by a connecting device for the mutual attachment of the first and second devices for storage or transport, which comprises a connecting bolt (20) and zx ^ ei protruding tabs (21), each on each device for ¹ Recording of the bolt are provided. 5. Prefabricated girder bridge », indicated by a Joint unit according to claim 1. 7. Procedure for erecting girder bridges from prefabricated individual parts over a span to be bridged from one exit bank to the opposite bank characterized by the following steps: a) Insertion and connection of the joint unit (11, 12, 13) between the last intermediate unit (2) of a bridge arrangement from intermediate units (2) and an end unit (5) j b) Adjusting the slope of the top of the end unit (3) with the hinge unit (10) in such a way that the undersides of the end unit (3) and the intermediate units (2) be able to walk in rolling contact over a roller located on the exit bank; c) advancing the over the joint unit (10) with the Zwisoheneinheiter. (2) connected end unit (3) via the hall facility over the zn bridging distance ... until the end unit (Z-) kit is in contact with the opposite bank., and d) Adjust & sr slope of the top of the end unit (Z)) with cisr Gslenkeinheit (10) according to the. ¹ «intended purpose of the bridge, _etc.