RU2004667C1 - Pontoon bridge park section - Google Patents

Abstract

The invention relates to motor technology. The link of the pontoon-bridge park includes two middle and two extreme pontoons with contours of the roadway and a hydrodynamic device. The hydrodynamic device is made in the form of a flexible coating consisting of upper and lower parts located respectively on the contour and bottom of the extreme pontoon on the lower side of the link. The coating is formed of individual stripes oriented along the length of the link and fixed to the extreme pontoon by means of rods and locks. 3 ill.

Description

The invention relates to bridge engineering and can be used in the equipment of crossings, in particular when building floating bridges on water obstacles with a very fast flow and when passing the breakthrough waves that are formed during the destruction of hydroelectric dams.

Equipment and maintenance of crossings at a high flow rate is difficult, and in many cases is excluded, since existing crossing facilities can be used at a low flow rate, which necessitates additional measures to preserve the floating bridges and reduce the carrying capacity of the crossings.

The link of the pontoon-bridge park is known, which includes four folding pontoons.

The closest technical solution in terms of technical nature and the achieved result to the invention is the link of the pontoon bridge park, consisting of four folding pontoons and including middle and extreme pontoons with contours, bottom and roadway.

A disadvantage of the known unit is that its use at a flow velocity exceeding 3 m / s is excluded, since under these conditions the pressure under the bottom of the link decreases due to an increase in the flow velocity in the flow of water flowing around the pontoons. This causes an increase in heeling moment leading to the trim of the link, which increases with increasing flow velocity. As a result, the link loses stability, which necessitates the termination of operation of the bridge. Therefore, the use of the link at an increased flow rate is not possible, which makes it difficult to overcome water barriers using these crossing means.

The objective of the invention is to improve the operational characteristics of the link of the pontoon bridge park, to ensure the possibility of its use at high flow rates and to reduce due to this time the delay of troops in overcoming harmful obstacles.

The problem is solved by reducing the trim of the link by increasing its hydrodynamic stability in the water flow by equipping the link with a flexible coating mounted on the bypass and bottom of the extreme pontoon.

Figure 1 shows a General view of the link with a flexible coating on the contour and the bottom of the extreme pontoon; figure 2 - link pontoon-bridge park from the bottom; Fig. 3 - fastening of the flexible coating elements on the extreme pontoon.

The link of the pontoon-bridge park contains four folding pontoons - two middle 1 and two extreme 2 pontoons with contours 3, bottom 4 and carriageway 5. Contour 3 and bottom 4 of extreme pontoon 2,

located on the lower side of the link, are equipped with a flexible coating, including the upper 6 and lower 7 panels, which are fastened with the help of longitudinal rods 8, locks 9 on the extreme pontoon 2.

To facilitate the installation of a flexible coating, it is cut into strips 10 oriented along the length of the link,

The link works as follows. Before building a bridge on a water obstacle with a high flow rate or during the passage of a breakthrough wave, flexible cover bands are installed on the link. After the pontoon bridge is removed, about the park with transport

car, open on the water and entering it into the axis of the bridge, the link with a flexible coating of the contour and the bottom goes into working position. When the bridge operates on a water barrier with a high flow rate running on a stream of water, the flow around the flexible coating causes it to oscillate, as a result of which part of the kinetic energy of the stream is lost on the fact that the water velocity in the boundary layer decreases.

the pressure at the bypass and bottom of the extreme pontoon increases, as a result of which the heeling moment leading to the trim of the link is reduced. Therefore, the trim of the link is reduced, which ensures its stable operation in the flow, thereby improving the operational characteristics of the link of the pontoon bridge park.

Equipment on the contour and bottom of the extreme pontoon of the flexible coating increases

hydrodynamic stability of the unit in the flow, since it allows to reduce its trim with increasing flow rate. This makes it possible to use the link of the pontoon bridge park.

at a high flow rate, which significantly improves the operational characteristics of the link.

(56) Pontoon-bridge park PMP. Guidance on material and application.

m.: Military Publishing, 1981, pp. 14-19.

Pontoon park special PPS-84. Book 1, Military Publishing House, 1990. p. 18-21, p. 28.

Claims (1)

The claims ANALOG OPPOSITION PARK, including two middle and two extreme pontoons with contours, a carriageway and a hydrodynamic device, characterized in that the hydrodynamic urstroy is made in the form of a flexible a roof consisting of upper and lower parts located respectively on the contour and bottom of the extreme pontoon on the lower side of the link, while the coating is formed of 5 individual stripes oriented along the length of the link fixed to the extreme pontoon by means of rods and locks. Fz. 2. Fig L 23 S3