RU2307888C2 - Joint for main span structure connection with access (exit) span structure adjoining thereto - Google Patents

Abstract

FIELD: bridge construction, particularly bridges characterized by the cross-section of their bearing spanning structure.

SUBSTANCE: joint comprises metal main span structure provided with diaphragms and orthotrophic roadway slab having transversal ribs extending transversely to longitudinal span structure axis. Diaphragms are also transversal thereto. United with main span structure is access (exit) one. Access (exit) span structure includes several layers and comprises longitudinal beams extending along exit axis. The beams are connected with each other by means of diaphragms and include roadway cooperating with longitudinal beam and made as orthotrophic slab having stricture similar to that of orthotrophic roadway slab. Said orthotrophic slab is supported by longitudinal beams of access (exit) span structure. Transversal ribs of orthotrophic slab and access (exit) span structure diaphragm extend in the same direction with transversal rib extensions and main span structure diaphragms. The access (exit) span structure is joined with main beams of main span structure through diaphragms. Longitudinal beams of access (exit) span structure are connected with transversal ribs of orthotrophic roadway slab of access (exit) span structure.

EFFECT: possibility to provide access (exit) in any main span structure point.

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Description

The invention relates to bridge construction and can be used in the nodes of the union of the main span with the span of the junction of the exit (entrance).

There is a known unit for combining the main span with the span adjoining the exit, including the main span made of metal, beams with diaphragms and an orthotropic driveway, the transverse ribs of which, as well as the diaphragms, are perpendicular to the longitudinal axis of the span and the adjacent span of the congress, resting abutments on the bridge support and made in the form of a box-shaped metal beam with diaphragms and an orthotropic drive plate. The main span is combined with the span of the congress using spacers and diaphragms. The transverse ribs of the orthotropic plate and the diaphragm of the span of the congress are located perpendicular to the longitudinal axis of the span of the congress. The longitudinal and transverse ribs of orthotropic plates of the main span and adjacent are oriented to each other at an angle / 1 /.

A disadvantage of the known site is the need for support at the junction of the span of the congress, the ambiguity of including in the joint work the elements of the main continuous span and the adjacent adjoining, which leads to the complication and cost of the bridge structure.

The present invention aims to provide the possibility of adjoining the span structure of the exit (entrance) at any point of the main span, regardless of the presence of the bridge support at this place, as well as the creation of the construction of the carriageway of the exit (entrance), similar to the construction of the carriageway of the main span, which simplifies the manufacturing and installation of an orthotropic driveway plate and ensures, from the point of view of the static work of the structure, joint work at the junction of the main span structure I also adjacent.

The problem is solved due to the fact that in the junction of the main span with the span of the exit (entrance), including the main span made of metal with diaphragms and an orthotropic driveway, the transverse ribs of which, as well as the diaphragms, are perpendicular to the longitudinal axis of the span, and the span of the congress (entrance), the span of the congress (entrance) is made in tiers and contains longitudinal beams installed along the axis of the congress (entrance), interconnected di fragments and having a carriageway included in collaboration with the longitudinal beams of the span of the exit (entrance) and made in the form of an orthotropic plate similar in construction to the orthotropic plate of the main span and resting on the longitudinal beams of the span of the exit (entrance), and the transverse ribs of the orthotropic slabs and diaphragms of the span of the exit (entrance) are oriented along the transverse ribs and diaphragms of the main span, while the span of the exit (entrance) of the union but with the main beams in the main superstructure field diaphragm arrangement and exit beams of the superstructure (entry) combined with transverse ribs orthotropic carriageway slabs superstructure Congress (entry).

Figure 1 shows the main span, cross section.

Figure 2 shows the abutment of the beams of the span of the exit (entrance), cross section.

Figure 3 shows the junction of the span of the congress (entrance), top view.

Figure 4 shows the bearing of the orthropic plate on the longitudinal beams of the exit (entrance), side view.

The main span 1 consists of closed-section metal beams 2, an orthotropic driveway 3, orifice plates 4. The transverse ribs 5 of the orthotropic plate 3 and orifice plate 4 are located perpendicular to the longitudinal axis of the main span. The longitudinal ribs 6 of the orthotropic plate 3 are oriented along the main span.

The main span 1 at an acute angle (~ 20-25 °) adjoins the span structure of the exit (entrance) 7, made in tiers - the lower part of the longitudinal beams 8, installed along the axis of the exit (entrance) and interconnected by diaphragms 9, and the upper parts in the form of an orthotropic plate 10 of the carriageway, supported by longitudinal beams 8. Longitudinal beams 8, combined with metal beams 2 of the main span 1 by means of diaphragms 9, have a height equal to the height of metal beams 2 of the main span 1 minus the height from the transverse ribs 5 of the orthotropic plate 3. The orthotropic plate 10 of the carriageway is made similar to the construction of the orthotropic plate 3 of the main span 1. The transverse ribs 11 of the orthotropic plate 10 and the diaphragm 9 of the span of the exit (entrance) 7 are oriented along the transverse ribs 5 and diaphragms 4 main span 1. Longitudinal beams 8 by means of diaphragms 9 are combined at the locations of the diaphragms 4 with metal beams 2 of closed section using vertical stiffeners 12 and with transverse ribs and 11 orthotropic plate carriageway exit (entry) 10 via a high-strength bolted connection 13.

The use of the carriageway of the main span 1 and the adjacent span of the exit (entrance) 7 of a similar design, as well as the identical orientation of the diaphragms 4, 9 and transverse ribs 5, 11 of the orthotropic plates of the carriageway of the main span and the adjacent span of the exit (entrance) provide a joint the operation of the structure as a whole while maintaining the uniformity of the technology for manufacturing and installation of bridge structures, reducing the consumption of materials (transverse rib 11 in addition to its main ii performs the role of a uniting element between the main span 1 and the adjacent span 7). This ultimately provides a decrease in the complexity of work and increase the pace of construction.

The tier structure of the adjacent span allows you to arrange an exit (entry) at any point of the main span, and it does not require a bridge support to support one of the ends of the adjacent span of the exit (entrance).

Information sources

1. Project of Giprotransmost OJSC No. 1180-KM “Section of the intracity ring highway from sh. Enthusiasts to Volgogradsky Prospekt ”, 2003, sheets 2, 4, 5 (overpass), (2 - KM-70, 4, 5 - KM 49).

Claims (1)

The unit of integration of the main span with the span of the exit (entrance), including the main span made of metal with diaphragms and an orthotropic driveway, the transverse ribs of which, as well as the diaphragms, are perpendicular to the longitudinal axis of the span, and adjacent to the main span of the exit (in ), characterized in that the span of the congress (entrance) is made in tiers and contains longitudinal beams installed along the axis of the congress (entrance), united by a diaphragm agmami, and the carriageway, made in the form of an orthotropic plate, similar in design to an orthotopic plate of the main span and resting on the longitudinal beams of the span of the exit (entrance), and the transverse ribs of the orthotropic plate and the diaphragm of the span of the exit (entrance) are oriented along the transverse ribs and diaphragms of the main span, while the span of the congress (entrance) is combined by means of diaphragms with the main beams of the main span, and the beams of the span I of the congress (entrance) are connected with the transverse ribs of the orthotropic plate of the carriageway of the congress (entrance).

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