SU1817797A3 - Suspension bridge - Google Patents

Description

The invention relates to the field of bridge construction and operation of bridges, in particular to suspension drawbridges.

The aim of the invention is to provide a spreading of the bridge span for the passage of floating equipment with a high superstructure.

FIG. 1 shows a general view of the suspension bridge in the transport position, before the start of the opening of the span; in fig. 2 - bridge, top view, in transport position: Fig. 3 - the same, in the raised position, only one half of the bridge is shown (the second half of the bridge is located symmetrically); in fig. 4 is a view along arrow A in FIG. 1; in fig. 5 - section b-b in Fig. 1.

On supports 1, pylons 2 and vertical posts 3 are installed, which are connected to pylons 2 by brackets 4. To ensure rotation of vertical posts 3 relative to pylons 2, bearings are installed in brackets 4 5. In the upper part, the ends of posts 3 are connected in pairs in the transverse direction by crossbars 6 using hinges, and the lower ends of the struts 3 are rigidly connected to the corresponding longitudinal elements 7 of the stiffening beam, which is made of 4 symmetrically located and rigidly interconnected longitudinal elements 7, and the interconnected elements 7 have the ability to compensate for temperature changes in length in the middle zone of the span bridge. Each element 7 of the stiffening beam is connected to the corresponding post 3 by inclined shrouds 8 and has the ability to rotate with it. Each pylon 2 is connected to a group of guys 9. Under each element 7, sealed containers 10 are installed using trusses 11. The elements 7 of the stiffening beams are interconnected by a longitudinal clamping set 12, made, for example, in the form of bolted connections, and a transverse clamping set 13. B the base of each swivel unit (post 3, longitudinal element 7, cables 8, containers 10 with trusses

1817797 AZ

11), resting on the support 1.The turning mechanism 14 is installed.

First, the sealed containers 10 are lowered from under the longitudinal elements 7 to the water surface, then they are immersed under water 5, Thus, additional supports are created under each element 7. After that, the longitudinal and transverse clamping sets 12 and 13 are dismantled. Then turning mechanisms 14 are turned on. while 10 mechanisms of rotation of each pivot unit work synchronously, providing symmetrical opening of the longitudinal elements 7 relative to the longitudinal median vertical plane of the bridge. This ensures balance from the overturning moments of the gravitational forces of the elements 7 in the transverse plane of the bridge. When separating the elements 7 of the stiffening beams, they should not go beyond the vertical transverse plane 20 passing through the vertical axes of the struts 3, and it is preferable not to rotate the elements 7 to this position, leaving the braces 9 under load. The transverse components of the forces from the cables 8 25 are closed on the crossbeams 6. and the longitudinal forces are transmitted through the guys 9 to the anchors in the coastal massifs (not shown).

Towing floating devices connected to trusses 11 can be used as turning mechanisms.

Sealed containers 10 can be stored separately, and when the bridge is pulled apart, they can be installed on the trusses 11 under the elements 7. When the elements 7 are rigidly connected into a single stiffening beam, then the need for additional supports (containers 10) is necessary for the span of the bridge at any height, of course, if sufficient depth for the passage of the underwater part of the craft.

In the case of a small width floating craft, only one side of the bridge can be pulled apart.

Claims (1)

Claim A suspension bridge, including supports with pylons, a stiffening beam located between the pylons and placed at the ends on the supports, cables and guys with coastal anchors, characterized in that, in order to ensure the possibility of opening the bridge span for the passage of floating equipment with a high superstructure, it is equipped with installed in front of the pylons and vertical struts located symmetrically relative to the axis of the bridge, connected to the pylons with the possibility of pivoting the struts relative to them, and the upper ends of the struts are connected by a pivotally attached crossbar, and the lower ends are mounted on a stiffening beam, while the stiffening beam is made of two symmetrically located relative to the transverse its axes of parts, and each part is formed of two longitudinal elements, moreover, the parts of the beam and the longitudinal elements are rigidly connected to each other with the possibility of separability, and the ends of the longitudinal elements placed on the supports are rigidly connected to the posts and mounted on the supports with the possibility of joint with the posts rotation in the horizontal plane by means of rotation mechanisms at an angle of at least 90 ° away from the axis of the bridge, while the stiffening beam is equipped with sealed containers located under it, attached to the beam by means of trusses with the possibility of submersion under water. disappears and they can be lifted under elements 7 or towed into the backwater. This design of the suspension bridge allows the passage of floating equipment through Fig. 4 6-5