RU179965U1 - REMAIN INSERT OF REM-500 AND NZHM-56 ESTADA ELEMENTS - Google Patents

Abstract

The utility model relates to the field of bridge building on railways. In particular, it can be used when constructing temporary (including short-term) bridges bypassing destroyed, under construction and reconstructed permanent bridges across navigable rivers, as well as when restoring bridges on the old The technical task of the utility model is the development of such a design of a draw span as part of the REM-500 trestle or temporary bridges with rigid supports that would provide the necessary bridge dimensions in width and in a compartment for a draw span in accordance with the class of the waterway and would ensure safe passage of trains on it. The indicated technical problem was solved due to the fact that the floating insert from the elements of the REM-500 and NZhM-56 trestle of the temporary railway bridge consists of several spans and tower supports of the REM-500 overpass and two spans NZhM-56, characterized in that the supports of the REM-500 overpass are placed on floating supports, each of which is assembled from pontoons NZHM-56, while on the composite racks of the overpass support SEM 500 has auxiliary jacks.

Description

The utility model relates to the field of bridge construction on railways.

In particular, it can be used in the construction of temporary (including short-term) bridges on the bypasses of destroyed, under construction and reconstructed permanent bridges across navigable rivers, as well as in the restoration of bridges along the old axis.

Known designs of a metal collapsible flyover REM-500 (hereinafter REM-500 flyover) and a floating railway bridge NZhM-56 (hereinafter NZhM-56) [1, 2].

Constructive solutions of one adjustable span as part of the REM-500 trestle are known due to the removal of two flat supports with shoes on two special bogies from the shipping span for the period of passage of ships (copyright certificate No. 1452226, registered on September 15, 1989 [3]), and arrangement of adjustable navigable span as part of the REM-500 trestle through the use of cable-block systems for turning up two halves of the movable span (copyright certificate No. 911927, registered on November 9, 1981 [4])

The main disadvantages of the first design of the navigable span is the complexity of the device in the navigable span of continuous span from spans of the REM-500 flyover with a limited height bridge bridge (not more than 6-8 m), which does not meet the requirements of inland waterways of I-V classes.

The adjustable span device according to the second variant requires the use of additional elements (winches, racks, blocks, ropes, etc.), which must be positioned and fixed on the spans of the REM-500 trestle. In addition, before breeding the flyover, each time it is necessary to use the installation of screwing the piles (for example, UZS-10) to unscrew the piles in two supports, and after mixing the halves of the adjustable span to screw them. A certain difficulty in this case is also the connection of racks with shoes that remain at the bottom of the river of the central support, especially at significant water flow rates and strong winds. In such conditions, the involvement of two divers is required.

As a prototype of the utility model, the design of the floating insert in the navigable adjustable span of the destroyed permanent highway bridge [5. fig. 4.5]. It consists of spans and two superstructures of metal intermediate supports from the property of a road collapsible bridge, as well as two floating supports from pontoons. Floating supports are anchored.

The disadvantages of the prototype is the inability to use it to pass the railway load and as a lead span in the navigable part of the restored railway bridge.

There are no designs of lead-out spans from overlay inserts from elements of both the REM-500 and NZhM-56 trestle for passing the railway load or they are not known to the authors of the utility model.

The technical task of the utility model is the development of such a drawbridge design as part of the REM-500 flyover or temporary railway bridges with rigid supports, which would provide the necessary bridge dimensions in width and height for the drawbridge in accordance with the class of the waterway and ensure safe passage through it railway trains.

The indicated technical problem is solved due to the fact that the floating insert from the elements of the REM-500 and NZhM-56 overpasses of the temporary railway bridge consists of several spans, tower supports of the REM-500 overpass and two spans NZHM-56, characterized in that the supports of the overpass REM-500 are placed on floating supports, each of which is assembled from pontoons NZhM-56, while auxiliary jacks are placed on the composite racks of the supports of the REM-500 trestle.

The layout of the ferry from the elements of the overpass REM-500 and NZHM-56 is shown in the figure, where it is indicated:

FIG. 1 - the facade of the floating insert; FIG. 2 is a plan of the fused insert; FIG. 3 is a cross section of a fused insert; FIG. 4 - node A; pos. 1 - superstructure NZhM-56 6.5 m long; pos. 2 - span of the REM-500 trestle 12.5 m long; pos. 3 - flat support REM-500; pos. 4 - longitudinal lower connection of the tower supports of the ramp REM-500; pos. 5 - diagonal communication tower towers REM-500; pos. 6 - longitudinal connections of the floating part of the ferry NZhM-56; pos. 7 - auxiliary jacks of the composite rack of the flat support of the ramp REM-500; pos. 8 - crossbar of the flat support of the ramp REM-500; pos. 9 - floating support of pontoons NZhM-56; pos. 10 - metal insert from the channel fixation span 1; 11 - anchor anchorage.

The device of the utility model is carried out in the following sequence.

Assembly (installation) of the floating insertion of the lead-out ferry (Fig. 1) is carried out at a special site downstream of the river in parallel with the construction of a temporary bridge with rigid supports (not shown) on both banks of the river to the ship.

At first, floating supports of 9 of the NZhM-56 pontoons are assembled. All floating supports 9 are combined into a rigid ferry structure by longitudinal links 6 of the super and lower sides (Fig. 2).

Then, the flat supports 3 are mounted on the floating supports 9 (Fig. 3). After that, the flat supports 3 by bonds 4 and 5 are combined into tower supports (Fig. 1)

By the following operations, all the span structures 2 of the REM-500 trestle are installed with a crane (for example, СРК crane) on flat supports 3 and connected into one span of the estimated length determined by the class of the waterway. Span structures 1 of NZhM-56 6.5 m long are connected to the extreme spans of the 2 REM-500 flyovers, which serve as transitional structures from the spans of the temporary bridge (not shown in the figure) to the spans 2 of the REM-500 overpass of the overhead insert (Fig. 1, 2 and 4). The inclined position of the span 1 is fixed by the insert 10 of the channel (Fig. 4).

The steam of the floating insert mounted according to the technology described above is displayed on the axis of the bridge and secured with anchors 11 of the super and lower sides of the ferry. After that, the jacks placed on the supports of the temporary bridge, the raised ends of the span 1 are lifted, and after cleaning the inserts 10 are lowered to the supporting parts located on the supports of the temporary bridge (not shown). After this, the connection of the overlay of the rail threads from the spans of the temporary bridge with the rails on the overlay insert is carried out.

At the same time, the position of the spans 1 and 2 on the ferry must have a building lift relative to the spans of the temporary bridge.

To compensate for the differences in the levels of the rail head on the temporary bridge and on the floating insert resulting from fluctuations in the water level in the river, auxiliary jacks 7 are used, which are placed on the composite struts of the support 3 of the REM-500 trestle (Utility Model Patent No. 172673 dated 07/19/2017 . [6]).

After the break-in of the bridge, the movement of trains is opened on it.

Thus, the proposed utility model allows navigation on rivers with the device of the floating insert as part of the temporary bridge on the bypass and when restoring the bridge along the old axis. It can also be used in the construction of temporary road bridges on detours and when restoring on the old axis.

The utility model extends the scope of the REM-500 and NZhM-56 overpass when installing temporary railway bridges across navigable rivers.

List of sources used

1. Metal overpass REM-500. Technical description and instructions for installation, transportation, storage and operation, Military Publishing, - M, 1976.

2. The floating railway bridge NZhM-56, Military Publishing, - M, 1977.

3. Copyright certificate No. 1452226 "Collapsible metal overpass", registered September 15, 1988.

4. Copyright certificate No. 911927 "Collapsible overpass", registered 09.11.1981

5. Reconstruction and operation of bridges on military roads, Military Publishing House of the Moscow Region, - M, 1988.

6. Patent for utility model “Composite rack of the flat support of the metal overpass REM-500”, registered July 19, 2017.

Claims (1)

A floating insert made of elements of the REM-500 and NZhM-56 overpasses of the temporary railway bridge, including floating supports from the NZhM-56 pontoons, united in a rigid structure by longitudinal connections, spans of the REM-500 overpass installed on composite racks of flat supports of the REM-500 overpass, which, using diagonal and lower longitudinal ties, are combined into tower supports of two span structures NZhM-56, pivotally attached to the ends of the end span structures of the REM-500 trestle, and spans NZhM-56 are fixed all additions of open U in an inclined position, the racks are placed on a composite support jacks for compensating differences of the rail head level of oscillation of the water level in the river.

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