SU808575A1 - Method and structure of temporary links for erecting prefabricated block-module slab of steel-ferroconcrete bridce span structure - Google Patents

Description

The invention relates to bridge construction and can be used in the installation of steel-reinforced concrete bridge spans.

A known method of mounting a team of blocks of reinforced concrete slabs of steel-reinforced concrete spans of the bridge, including fastening to metal structures in the plane of the lower belts of longitudinal ties, laying blocks of reinforced concrete slabs and combining them with the metal structure by means of stops, the longitudinal ¹ ties being made of linear elements forming a horizontal lattice truss [ 1].

A disadvantage of the known installation method is the considerable difficulty in disassembling the longitudinal ties under the reinforced concrete slab after combining it with the metal structure, and leaving ties in the span for the period of operation of the bridge leads to an increase in metal consumption. At the same time, despite the presence of lower ²¹ longitudinal bonds, a possible loss of stability of the upper compressed metal construction belts is not ruled out before the reinforced concrete slab blocks are combined with it, which makes it necessary in some cases to establish additional bonds at the level of the upper metal construction belts at the installation stage.

Closest to the proposed one is a method of mounting a prefabricated reinforced concrete slab of steel-reinforced concrete bridge span, including fastening temporary structures to the metal structures of the superstructure in the plane of the upper belts, laying reinforced concrete slab blocks and combining them with the metal structure by means of stops, dismantling temporary connections, and dismantling temporary connections produced after uniting reinforced concrete slab blocks with metal structures, and temporary ties are made in the form of their horizontal trusses linear elements [2].

The disadvantage of this method of mounting zaklyu- ⁵ chaetsya difficulty in disassembly temporary connections under the concrete slab at the end of its association with the metal structure, leading to increase in terms of construction.

The purpose of the invention is the reduction of construction time. _h

This goal is achieved by the fact that in the method of assembling a team of reinforced concrete slab blocks of steel-reinforced concrete span of the bridge, including j securing the span to the metal structures in the plane of the upper zones of temporary ties, laying blocks of the reinforced concrete slab and combining them with the metal structure by means of stops, dismantling temporary ties, dismantling temporary connections are made alternately in the process of laying and combining the blocks of the reinforced concrete slab with the metal structure.

Moreover, in the design of temporary ties, including a system of elements fixed to metal structures in the plane of the upper chords, each element of temporary ties is made in the form of a flat sheet bordered by stiffeners with cantilevered protrusions for detachable connection to the corresponding stops. 2

In FIG. 1 shows an element of temporary connections fixed to a metal structure, general view; in FIG. 2 - mount the element of temporary communication to the stops; in FIG. 3 - the same, top view. .

The method of mounting a prefabricated reinforced concrete slab block of steel-reinforced concrete span bridge includes fastening to metal structures 1 in the plane of the upper belts of temporary ties, each element of which is made in the form of a flat sheet 2 bordered by stiffening ribs 4 having cantilevered protrusions 3, laying reinforced concrete slab blocks and combining them metalwork 1 by means of stops 5, the dismantling of temporary ties, carried out alternately in the process of combining blocks of reinforced concrete slabs with metalwork.

In this case, the flat sheet 2 can be made with holes bordered by stiffening ribs 6. The flat sheet 2 of the temporary connection element is fixed on the metal structure 1 by releasably connecting the cantilevered protrusions 3 to the corresponding stops 5.

The use of the proposed design of temporary ties of the frame type simplifies the operations of their installation and dismantling, and in combination with the proposed method of installing reinforced concrete slabs, it reduces the construction time of the bridge.

Claims (2)

The purpose of the invention is to reduce the construction time. This goal is achieved by the fact that in the method of installation of a composite block of reinforced concrete slabs of a steel-concrete superstructure of the bridge, including fixing the superstructure on the metalwork in the plane of the modern time, installing blocks of reinforced concrete slab and combining them with metal constructions by means of stops, disassembling of temporary connections, dismantling of temporary connections is carried out alternately in the process of laying and joining blocks of reinforced concrete Litas with steel structures. At the same time, in the construction of temporary connections, including a system of elements attached to a metal structure in the plane of the upper strip, each element of temporary connections is made in the form of a flat sheet bordered with stiffening ribs having console protrusions for detachable connection to the corresponding stops. FIG. 1 shows a temporary communication element attached to a metalwork, a general view; in fig. 2 shows a fastening unit for a temporary connection to the stops; in fig. 3 - the same, top view. The method of assembling a prefabricated block of reinforced concrete slab of a steel reinforced concrete span of the bridge includes fixing it to the metalwork 1 in the plane of the upper-sided temporary connections, each element of which is made in the form of a flat sheet 2 bordered by stiffening ribs 4 having cantilever ledges 3, laying the blocks of reinforced concrete slab and combining them with metal construction 1 by means of stops 5, dismantling temporary connections, carried out alternately in the process of combining reinforced concrete slab units with metal construction tie. In this case, the flat sheet 2 can be made with edged stiffening ribs 6 of the openings 7. The fastening of the flat sheet 2 of the temporary connection element to the metalwork 1 is performed by detachably attaching the console lugs 3 to the respective stops 5. The use of the proposed frame-type temporary connection design simplifies operations for their installation and dismantling, and in combination with the proposed method of installation of reinforced concrete slabs provides a reduction in the construction time of the bridge. Claim 1. Method for assembling a prefabricated block of reinforced concrete slabs of a steel-concrete superstructure of a bridge, including fixing the superstructure to the metal structures in the plane of the uppermost temporary connections, laying the blocks of the reinforced concrete slab and combining them with metal structures by means of stops, dismantling temporary connections, distinguishing them that, in order to shorten the construction time, the dismantling of temporary connections is carried out alternately in the process of laying and joining blocks of reinforced concrete slab with m tallokonstruktsiey. 2. The construction of temporary connections for the implementation of the method according to claim 1, comprising a system of elements fixed to the metal structure in the plane of the upper strip, characterized in that, in order to simplify the installation and disassembly of temporary connections, each element of temporary connections is made as a flat sheet bordered with stiffeners with cantilever protrusions for detachable attachment to the respective stops. Sources of information taken into account in the examination 1.Typova project Lengiprotransmostta. 1968, No. 609. 2. Gibschman EE. Design of metal bridges, M., “Transport, 1969, p. 251. (Rig.z