SU1359392A1 - Multispan bridge - Google Patents

Abstract

The invention relates to the field of bridge construction and can be used in stretched bridges, the channel part of which overlaps with the use of a viscous system. The aim of the invention is to reduce the material capacity and complexity of the installation of the bridge. The multi-bridge bridge includes end sections in the form of beam spans 1 supported by coastal and intermediate 3, 4 supports and a central section located in the navigable part of the river, a section consisting of pylons 5 with supports 6, a three-span rigidity beam 7, carrying cable 8 s by straps 9, hangers 10 and anchor blocks 11 for fixing the straps 9 of the carrier cable 8. Anchor blocks 11 are placed inside or on the tips of the intermediate supports 3; closest to the pylons 5 of the central section. At the same time, the end sections of the three-span stiffener beam 7 are provided with an OPTIMAXY blocks 12 with curvilinear guides 13, and the sheaths 9 of the carrying cable 8 bend around the curvilinear guides 13 and inserted vertically into the anchor blocks 11. 4 Il. € (L 9 5 ff i LilAlAlAJ / J SLI SL Х X) CO ND qjue.

Description

The invention relates to bridge construction and can be used with H (j in stretched bridges, the channel part of which overlaps with the use of a whisker system.

The purpose of the invention is to reduce the material and labor intensity of the bridge installation.

Fig. 1 shows the facade of a multi-span bridge with a central high section (a variant with a two-level ride); in fig. 2 - erection of beam spans with part, stiffening beams, pylons, anchor blocks (nozzles) and deflecting blocks; in fig. - installation and anchoring of the carrier cable with suspensions and the subsequent installation of the stiffness beam in the main span; nd FIG. 4 - the end of the Mounting and the elimination of the connecting elements between the stiffening beam and the adjacent spans (when driving low). }

The multi-span bridge includes end sections in the beam spans 1, supported by coastal 2 and intermediate 3 and 4 piers and a central section in the navigable part of the river, consisting of pylons 5 with pillars 6, three-span rigidity beam 7, carrier cable 8 with straps 9, hangers 10 and anchor blocks 11 for fastening the brackets 9 of carrier cable 8.

The anchor blocks 11 are placed inside or on the ends of the intermediate supports 3 closest to the pylons 5 of the central section, while the ends of the three-span reinforcement beam 7 are provided with deflecting blocks 12 with curvilinear guides 13, and the straps 9 of the carrying cable 8 bend around curvilinear guides 13 and placed vertically in anchor blocks 11 Beam span structures 1 and track rigidity beam 7 can be made in the form of through-shaped with a lower ride or in two levels, and as an anchor block for fixing the straps messenger cable can be used the amplified nozzle 3 corresponding to the intermediate support beam span structure 1, with channels for cables house advantage messenger cable (not shown).

9392

The multi-span bridge works as follows.

Multi-span bridge mounted in the following sequence

(Fig. 2-4). After the construction of intermediate supports 3 and 4, and supports 6 under. pylons 5 and pylons 5 proceed to the installation of side spans of a beam 7 10 rigidity together with beam spans 1 using semi-mounted or conveyor-rear assembly from both sides by known methods. The beam is installed on the length 15 of the main span on the length of the console, excluding the use of temporary supports in the main (shipping) span.

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0 Subsequent mounting of the stiffener beam in this span is carried out with suspension of the stiffness beam to the suspensions 10 fixed to the supporting cable 8 element by element or one by one. For this purpose, the end sections of the beam span structures are fixed on both sides of the main span by means of cable or cable Zhek 14 on the banks of the barrier. This allows the subsequent installation of the carrier cable, suspensions and stiffeners in the main span due to the perception, spreading of these loads from temporary coastal

5 anchors 15 with the help of 14,

since the stiffness beam in the main span is not closed for the installation period, it is not capable of perceiving the specified thrust. Such a technique would eliminate the need to build temporary supports in the main span, since the part of the stiffening beam mounted in this span is supported by a supporting cable and

5 pendants. After installation of the stiffener beam, in necessary cases, it is necessary to make adjustments of the forces in the viscous system of the central section, and the stiffness beam can be

0 is separated from the beam superstructures adjacent to it on both sides (Fig. 4) or left in a multi-span continuous scheme (Fig. 1). In the latter case, the fixed support part (not shown) should be placed on one of the intermediate supports 3 in order to avoid transferring a significant tensile force from the expansion to the beam span structures 1 from one side or the other with respect to the central section.

The execution of carrier cable delays, enveloping curvilinear guides 13, deflecting blocks and inserting them into the channels of the anchor blocks vertically excludes the effect on the intermediate supports of the 3-horizontal component force in the inclined cables 9 of the carrier cable. At the same time, the anchor block, which forms the nozzle, experiences substantially less tearing forces from the tension of the carrying cable, since pressure is transferred from it to constant and temporary loads on the 3 spans adjacent to the support. In this case, the greater the temporal load is located within the central section, the greater the force arises in the carrier cable, but the greater the pressure from above and the support 3, as these forces are largely balanced. In connection with this, as in the anchor blocks (nozzles) and intermediate supports 3, significantly smaller support reactions occur.

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This bridge with a perceived stiffness beam 7 allows the bridge to significantly reduce the material consumption by reducing the material consumption of the anchor blocks and supports of the central section and ensure its rational use in multi-span bridges.

Claims (1)

Invention Formula Multi-span bridge including end sections in the form of beam 15 span structures supported by shore and intermediate supports, and a central section consisting of pylons with supports, a three-span reinforcement beam, carrying a cable with 20 braces, hangers and anchor blocks for fastening braces, characterized in that, with a view. the rottenness of materials and labor-intensive installation of the bridge, anchor 25 blocks are placed inside the intermediate supports that are closest to the central section or on their tips, to form attachment supports, and the end sections of the three-span reinforcement beam provide 1y-j - j-- - - ".fc.i yi" j ± Axz 4 . d ..- ljT. l.nclU - than in a conventional beam bridge, the zones reinforced on them deviating at certain ratios of constant and temporary loads, these bridge supports can even be pulled out. The indicated design features of the central sections with blocks with curvilinear guides, with the cable carrier bends around curvilinear guides and inserted vertically into the anchor blocks. 1359392 By using a bridge with a perceived stiffness beam 7, it significantly reduces the material consumption of the bridge by reducing the material consumption of the anchor blocks and supports of the central section and ensures its rational use in multi-span bridges. Invention Formula Multi-span bridge including end sections in the form of beam span structures supported by shore and intermediate supports, and a central section consisting of pylons with supports, a three-span reinforcement beam, carrying a cable with braces, hangers and anchor blocks for fastening the braces, characterized in that, with a view. the rottenness of materials and labor-intensive installation of the bridge, anchor the blocks are placed inside the intermediate supports closest to the central section or on their tips, forming the attachment of the supports, and the end sections of the re-spar rigidity beam are provided with -d - j-- - - ".fc.i-i" j ± Axz 4. d ..- ljT. l.nclU - They are fixed to them by deflecting blocks fixed to them with curvilinear guides, with the cables of the carrying cable bending around curved guides and placed vertically into the anchor blocks. . . .-, j // 12 4 / FIG. 2 m Compiled by V. Gonik Editor A. Revin Tehred M. Didyk Proofreader I. Order 6121/30 Circulation 489 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4