Method to erect ice-resistant platform

FIELD: construction.

SUBSTANCE: method includes deepening and installation of an underwater part of the structure into bottom deposits, fixed fastening of a hollow board to it, made in the form of a ball segment with perforated surface. During assembly of the board its upper part is placed above the surface of the ice cover, and the base is submerged into water. Supply-and-exhaust shafts and tight hatches are placed into the cavity of the board. The underwater part of the platform is equipped with transition gateways and joint assemblies. A tunnel is installed from the platform to the coast, and in it they install a pipe canal, tight partitions, additionally it is equipped with transition gateways, joint assemblies. The tunnel is used as a permanent transport link and moorage for underwater vessels.

EFFECT: increased reliability of operation of hydraulic engineering structures of island type in Arctic seas.

1 dwg

 

The invention relates to the field of development of the resources of the continental shelf, and, in particular, to the construction in the Arctic seas island platforms type in terms of the drift of icebergs progress frozen ice fields.

There are technologies of construction in areas of icebergs drifting ice objects, for example: "the Method of construction of the Arctic platform" (U.S. Pat. No. 2238365, publ. 20.10.2004 - similar). The decision with regard to the protection of structures from ice impacts include: strengthening of bottom sediments, construction on the bottom of foundations, installation of the underwater and above-water parts support semi-submersible platform, equipped with ballast tanks and process equipment. The upper part of the structure is in the form of a pontoon, and submarine support facility is equipped for mounting and Dismounting bearings, towing and removal of the pontoon from the drift of icebergs. But at considerable cost, the method does not allow for safe operation of the Arctic platform at the movement on her frozen ice fields.

In relation to extreme conditions in the Northern seas there are various technologies, design solutions delivery vessels, underwater culverts and tunnels materials, equipment, and personnel used in the construction and operation of hydraulic facilities the response transportation of raw materials to consumers. Under these conditions, the transport must be conducted using approved developments, such as: "Device docking space object" (U.S. Pat. No. 2195417, publ. 27.12.2002 - similar). The device represents a transition gateway butt node and is intended for use underwater ships, and spacecraft.

Security platforms in the areas of drift annual, multiyear ice is provided by the known solutions, for example: "a Method of protection of hydraulic structures from ice movement in the Arctic seas" (ed. mon. The USSR №990954, publ. in bull. No. 3, 1983 - similar). The method includes: equipment platform island ice-breaking device type mechanism, the fastening structure to the bottom and approaching him ice, creating in the contact zone of the ice platform overpressure and its destruction. Tackle disadvantage is the limited performance ice-breaking device mechanism under intensive shearing of the ice fields.

From known designs, methods of construction of platforms in the seas with heavy ice conditions closest to the claimed solution is: "Island-resistant structures" (ed. mon. No. 1076519, publ. in bull. No. 8, 1984 - prototype). The construction includes the depth of the underwater part of its support in d is by deposits, fixed attachment to the support of the hollow shield, the upper part of which is placed above the ice surface, and the base is immersed in water. The shield is made in the form of a spherical segment with a perforated surface, equipped with supply and exhaust shafts, sealed hatches, ensure the safe operation of the platform under intensive shearing of perennial ice fields. However, the decision does not allow for logistics facilities in continuous drift of Arctic sea ice.

The objective of the proposed method is to increase the reliability of operation of the ice-resistant platforms.

The essence of the proposed solution is as follows.

The construction of the ice-resistant platform includes: slope, depth and installation of its underwater part in sediments, stationary fixed to the platform of the hollow shield, made in the form of a spherical segment with a perforated surface. When mounting the shield upper portion is placed over the surface of the ice cover and the base is immersed in water. In the cavity of the shield place of supply and exhaust shafts and sealed the hatches. The underwater part of the platform equip transitional gateways, connecting nodes. From platform to coast tunnels and place the pipe in a sealed bulkhead. The tunnel is additionally equipped with transitional ø what skidding and connecting nodes. The tunnel is constantly used as transport links, as well as berths for submarine vessels.

The method of construction of the ice-resistant platform is illustrated in the drawing, where Fig.1 shows a vertical section of the ice-resistant platform.

The implementation of the method provides for the following :

After delivery of the platform elements in developing the district installs, the depth of the underwater part of the platform 1 in sediments 2, fixed to the underwater part of the platform 1 of the hollow shield 3 made in the form of a spherical segment with a perforated surface (see Fig.1). In the cavity of the shield 3 place of supply and exhaust shafts 4 and sealed the hatches 5. The underwater portion of the platform 1 equip transitional gateways 6 and connecting nodes 7 and from the coast to the platform tunnels 8 and place in it the pipe 9, the sealed bulkhead 10. The tunnel 8 is additionally equipped with transitional gateways 6 and docking ports 7. The tunnel 8 is constantly used as transport links and pier for submarine vessels 11. At the movement of the ice cover in the zone of contact with the platform changes its direction and magnitude of pressure on the structure. In the process of moving on a spherical surface of the shield 3 ice collapses. Ice formed cracks and atmospheric air enters through the holes 12 and inlet-exhaust shaft 4 in perforirovannoi the part spherical shield 3 and the working cavity of the underwater part of the platform 1.

The proposed solution with optimal cost will ensure the operating reliability of the platform in the Arctic seas.

The method of construction of the ice-resistant platform, including installation, the depth of the underwater part of the platform in bottom sediments, attaching thereto a hollow shield, made in the form of a spherical segment with a perforated surface, placement in the cavity of the shield supply and exhaust shafts and sealed hatches, equipment underwater part of the platform transitional gateways and connecting nodes, the laying of underwater tunnels and siphons, characterized in that the hollow shield still fixed to its underwater part, then from the coast to the platform tunnels and in his oral place pipe, sealed bulkheads, additionally equip the tunnel transition gateways, connecting nodes.



 

Same patents:

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2 dwg

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7 cl, 1 ex, 1 tbl, 6 dwg

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11 cl, 15 dwg

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