专利摘要:
PCT No. PCT/NO83/00037 Sec. 371 Date Jun. 5, 1984 Sec. 102(e) Date Jun. 5, 1984 PCT Filed Sep. 9, 1983 PCT Pub. No. WO84/01592 PCT Pub. Date Apr. 26, 1984.An offshore platform structure (1) comprising a deck superstructure (4) which is supported at least by three inclined lower supporting columns (5) which are arranged apart and extend convergingly upwards towards an intermediate structure (6), and one or more upper columns (7), extending upward from the intermediate structure, supporting the deck superstructure. At least the lower supporting columns (5) have varying diameter, the columns having their largest diameter in the area of the towing water line during the towing-out of the platform structure from the construction site. Slipforming means intended for slipforming inclined, hollow columns of reinforced concrete, comprising a slipform platform (14) including the form work (28,29), which is supported by and may be lifted/lowered by means of a climbing rod system (12) which is fixed to the already cast, cured portions of the column (11). The form work is by means of a number of yokes (26,27) suspended from the slipform platform and comprises inner and outer formsheets (28,29 extending in circumferential direction. The yokes are adjustable in radial direction with respect to the slipform platform while the form sheets are adjustable in tangential or circumferential direction with respect to each other. One of the form work walls is radially adjustable with respect to the other. The slipforming means is intended for slipforming hollow, inclined columns having increasing and/or decreasing diameter.
公开号:SU1553016A3
申请号:SU843755002
申请日:1984-06-20
公开日:1990-03-23
发明作者:Опедал Торлак;Эйнстабланд Томас
申请人:Ингениэр Ф.Селмер А/С (Фирма);
IPC主号:
专利说明:

one
(21) 3755002 / 23-15
(86) PCT / NO 033/00037 (09/26/83)
(22) 20.06.84
(23) 10/21/82
(31) 823503
(32) 10/21/82
(33) NO
(46) 03/23/90. Bul № 11
(71) Ingenier F.Slmer A / C (N0)
(72) Torlak Opedal and Thomas Einste-bland (N0)
(53) 627.2 (088.8)
(56) U.S. Patent No. 3,911,687, Cl. 61-46, 5, 1975.
Norwegian patent number 140536, cl. E 02 B 17/00, 1979.
(54) MARINE PLATFORM
(57) The invention relates to hydraulic construction. The purpose of the invention is to simplify the production of installation of the platform on the place of placement in the sea due to
its stability during transportation afloat. The design of the offshore platform 1 comprises a surface deck part 4 supported by at least three lower inclined supporting columns 5 spaced apart by a certain distance and converging upward in the direction of the intermediate connecting structure 6, as well as one or more upper columns 7 extending upward from the intermediate bonding structure and supporting the surface deck part 4. The lower inclined supporting columns 5 have a varying diameter. Moreover, the largest diameter of the column lies in the area of the waterline when towing the platform from the construction site to the place of its installation. Waterline 8 may be located at or below the level of intermediate structures 6. 1 hp f-ly, 2 ill.
(/
sd ate
with
05
 cm
3155301
This invention relates to hydraulic construction, in particular, to the construction of an offshore platform.
The purpose of the invention is to simplify the production of installation of the platform on the place of placement in the sea by increasing its stability during transportation afloat.
FIG. 1 schematically depicted
the proposed platform when placing the platform waterline during its transportation afloat at the level of an intermediate bonding structure; in fig. 2 - the same, when placing the platform waterline during its transportation afloat under an intermediate binder structure.
The design of the offshore platform 1 includes the base 2, the underwater 3 and the surface 4 paluya parts. The construction of the submerged part 3 comprises inclined lower support columns 5, converging to an intermediate bonding structure 6, which supports one or more upper supporting columns 7, on which the surface deck 4 is supported. Subsea part 3 can be equipped with four or more columns. The upper submerged part of the subsea structure is shown in the drawings with one upper supporting column 7, however, the deck part can be supported, for example, on the two upper supporting columns. The largest diameter supporting tower section lies approximately at the level corresponding to the waterline 8 when towing the platform
from the construction site to the installation site.
. The marine platform is installed as follows.
Construction and towing of the platform to a certain point in the sea space is carried out in a strictly upright position of the platform. During towing, it is desirable to have the largest possible CieneHb precipitation, since a large draft for the platform construction is preferable in terms of its buoyancy and stability. To ensure buoyancy, it is recommended that large volumes of buoyancy be located at the top of the structure. The optimal draft for towing is a draft corresponding to the depth at the installation point minus the required clearance between the bottom
0
,
5 35
40
55 p and design. Since the sea depth on the towing path is limited, for a sea depth above about 300 m draft when towing should be significantly less than the sea depth at the installation site. If, for example, the installation of the platform is to be carried out at a point with a depth of 400 m, more than half of the platform's structure should be protruding above the water level during towing. If, in addition to the concrete submerged structure, a deck is installed over the columns, this should significantly affect the stability of the whole structure.
Shown in FIG. 1 platform structure is designed for installation in shallow water areas, for example, 300 m deep. The lower supporting columns 5 have the largest diameter in the upper part, i.e. at the level of fastening of the columns 5 to the intermediate bonding structure 6. The internal volume of such a structure allows to increase its buoyancy.
When towing such a platform, the waterline passes approximately along the upper surface of the intermediate linking structure 6.
FIG. 2 shows a platform designed to be installed at a great depth, for example, about 400 meters. The cross-sectional area of the lower supporting columns 5 increases in the vertical direction, i.e. from the base to the level of the largest diameter corresponding approximately to the waterline 8 when towing the platform from the construction site to the installation site, after which it decreases again in the direction of the intermediate structure 6.
Thus, in this case, the waterline 8 platform is located above the intermediate structure 6.
The inclined columns 5 are made of hollow reinforced concrete. The buildup of inclined supporting columns 5 of variable diameter with walls of different thickness is provided by means of a pouring device in sliding formwork, in which all workers, control and executive systems are located inside with respect to the formwork and columns, which simplifies and facilitates management, maintenance, and also implementation of column casting.
权利要求:
Claims (2)
[1]
1. Marine platform, including reinforced concrete surface deck part, the underwater part and the base of a polygonal, mostly triangular in shape, to which the underwater part is attached, made in the form of at least three converging lower supporting columns separated from one another and resting on the base, and one or several upper columns mounted on an intermediate bonding lower inclined columns of the structure on systematic way up from the latter and supporting the freeboard portion, the columns are hollow, with the transport platform afloat in a vertical position to the location in the sea and subsequent vertical installation on the sea bed characterized in that, in order to simplify production work
7G / 77 / S / s / ss ss / /// s // ss / / ///
0
n 25
five
to install the platform into the sea at the expense of increasing its stability during transportation afloat, the inclined lower support columns are made with an external diameter that gradually increases upwards from the base to the intermediate connecting structure and reaches a maximum value at the platform waterline level when it is transported afloat while the walls of the hollow, inclined lower support columns are made with a thickness decreasing down towards the base.
[2]
2. The platform according to claim. Characterized in that when the platform waterline is located when it is transported afloat under the intermediate linking structure at a distance from the latter, the inclined lower support columns are made above the waterline in the direction of the intermediate linking structure with external diameter, gradually decreasing from its maximum value at the waterline level.
Fi & 2
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同族专利:
公开号 | 公开日
GB2184151B|1987-12-02|
NO823503L|1984-04-24|
NO157831C|1988-06-08|
JPS59501914A|1984-11-15|
WO1984001592A1|1984-04-26|
GB2184151A|1987-06-17|
GB8412156D0|1984-06-20|
GB2136862B|1987-02-18|
GB2136862A|1984-09-26|
US4688967A|1987-08-25|
NO157831B|1988-02-15|
CA1228738A|1987-11-03|
GB8527739D0|1985-12-18|
US4741648A|1988-05-03|
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法律状态:
优先权:
申请号 | 申请日 | 专利标题
NO823503A|NO157831C|1982-10-21|1982-10-21|FRALAND'S PLATFORM CONSTRUCTION OF ARMED CONCRETE WITH UPPER CONVERSING CARRIERS AND SLIDE FORCE FOR USE IN CASTING THE CARRIERS.|
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