RU2498003C2 - Sea bridge - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: sea bridge is made of giant balls-floats from stiff foam plastic in a strong shell and ropes stretching via their middle with tubular elements of an overbridge on strainers and bearings, making it possible for the floats to rotate around the overbridge.

EFFECT: possibility to use a bridge for transportation of cargo and passengers via bays, channels, where ordinary bridges may not operate.

1 cl, 3 dwg

Description

INTRODUCTION: The invention relates to means of crossing, in particular to floating bridges.

Known pontoon bridge, composed of separate sections, which after launching are connected by butt devices. The length and carrying capacity of such a bridge are provided by changing the number of sections / TSB, second edition, volume 34, p. 147 /.

The use of pontoon bridges is limited by the small width of the body of water and great excitement.

The use of the proposed sea bridge eliminates these disadvantages.

DESCRIPTION OF THE DEVICE: The sea bridge is an overpass 1, passing through the floats 2, made of rigid foam, enclosed in a durable stainless shell 3/1 /.

An overpass consists of separate tubular elements 7 and 8 connected inside the floats by an “accordion” 9 similar to that of the transition platforms of trains. On bearings 6, the float can rotate around the overpass / Fig.3/.

Between the double walls of the overpass 1 are heavy-duty tension cables 4, securing the bridge on both banks / 1 /.

Inside the floats, the overpass is installed on shock absorbing stretch marks 5.

The center of gravity of the transporting part of the overpass is below its midline. It can transport cars and trains on an air or magnetic cushion.

The floats are of such a size that under the overpass can freely pass ocean-going vessels of all types / Fig.2/.

In ice-free waters, the sea bridge may be anchored.

DEVICE OPERATION: Imagine a sea bridge across the Bering Strait connecting Russia and the USA, the distance between which is 85 km, and about in the middle are the islands of Diomede. With strong excitement, the elements of the bridge together with the floats can go up and down, the floats will rotate, but the equipment passing through the pipeline will not have a significant roll, but will go smoothly "uphill" and "from the mountain".

Due to the high streamlining of the bridge, even with a strong storm, it will not be damaged.

In winter, the floats will be squeezed out by ice onto its surface, and during the melting of the ice and the passage, the floats of the bridge will freely roll over it.

In the future, it is possible to generate electricity by rotating floats to illuminate the sea bridge at night.

CALCULATION OF THE MARINE BRIDGE

We take the diameter of the float 80 m, the specific gravity of the foam is 50 kg / cubic meter, the specific gravity of the metal is 8 tons / cubic meter.

The length of the overpass element is 200 m, the diameter is 20 m, the total thickness of the four pipes inserted into each other is 0.2 m.

The cable diameter is 0.1 m, length 200 m, the specific gravity of the metal is 8 tons / cubic meter. Number of cables 100 pcs.

We will carry out the calculation for 200 meters of the path.

1. The surface of the float; 3.1480 ² = 20.096 sq.m.

2. The volume of the float: 3,14: 6 · 80 ³ = 267.947 cubic meters

3. The diameter of the void is 15 m in the ball, hence its volume: 1.766 cubic meters.

4. The volume of the float without emptiness: 267.947-1.766 = 266.181 cubic meters

5. The weight of the foam: 50 kg / cubic meter · 266.181 cubic meters = 13.309 tons

6. The volume of the shell with its thickness of 0.02 m: 20.096 sq.m · 0.02 m = 401.9 cubic meters

7. Shell weight: 8 t / cbm · 401.9 cbm = 3.215 t.

8. Weight of foam plus shell weight: 13.309 t + 3.215 = 16.524 t.

9. The area of the overpass element: 2 · 3.14 · 200 m = 12.560 sq.m.

10. The volume of the overpass element: 12.560 sq.m · 0.2 m = 2.512 cubic meters.

11. The weight of the overpass element: 8 tons / cubic meter · 2.512 cubic meters = 20.096 tons.

12. The weight of the float plus the weight of the overpass element / without cables /: 16.524 t + 20.096 t = 36.620 t.

13. Cable cross-sectional area: 0,00785 sq.m.

14. Volume of 200 m of cable: 0.00785 sq.m · 200 m = 1.57 cubic meters

15. Weight of the cable: 8 t / m3 · 1.57 m3 = 12.56 t.

16. The weight of all cables in a 200 m section: 12.56 t · 100 pcs. = 1.256 t.

17. Total weight of the float: 36.260 t + 1.256 t = 37.876 t.

18. Let a train weighing 1.000 tons and 20 cars with a total weight of 300 tons go through a 200 m section, then the weight of the float loaded will be: 37.876 tons + 1.000 tons + 300 tons = 39.176 tons.

19. What part of the volume of the float under the action of total gravity will go under water: 39.176 tons: 266.181 cubic meters = 0.147, which corresponds to approximately 1/7 of the volume of the float.

P.S. The immersion value of the ball float in water can be significantly reduced due to the shell metal, the specific gravity of which can be lower than 8 t / cubic meter, as well as by reducing the thickness of the foam layer. An approximate calculation shows that the construction of a 100-kilometer sea bridge / that is, through the Bering Strait / can cost a little more than $ 15 billion.

Claims (1)

The sea bridge, characterized in that it contains balloons-floats in a durable shell, an overpass made of tubular elements connected by an accordion, tension cables, shock-absorbing extensions and bearings that allow the floats to rotate around the overpass.

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