DK144661B - SWIMMABLE PLATFORM EASY TO USE AT GREAT DEPTHS - Google Patents

SWIMMABLE PLATFORM EASY TO USE AT GREAT DEPTHS Download PDF

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Publication number
DK144661B
DK144661B DK375072A DK375072A DK144661B DK 144661 B DK144661 B DK 144661B DK 375072 A DK375072 A DK 375072A DK 375072 A DK375072 A DK 375072A DK 144661 B DK144661 B DK 144661B
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DK
Denmark
Prior art keywords
platform
swimmable
support
great depths
platform easy
Prior art date
Application number
DK375072A
Other languages
Danish (da)
Other versions
DK144661C (en
Inventor
U Magnanini
Original Assignee
Tecnomare Spa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Tecnomare Spa filed Critical Tecnomare Spa
Publication of DK144661B publication Critical patent/DK144661B/en
Application granted granted Critical
Publication of DK144661C publication Critical patent/DK144661C/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B17/00Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/02Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
    • E02B17/027Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto steel structures
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B17/00Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0056Platforms with supporting legs
    • E02B2017/0073Details of sea bottom engaging footing
    • E02B2017/0082Spudcans, skirts or extended feet

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
  • Artificial Fish Reefs (AREA)

Description

(19) DANMARK \R&/ ± l.jfcSl(19) DENMARK \ R & / ± l.jfcSl

(12) FREMLÆGGELSESSKRIFT od 144661 B(12) PUBLICATION OF 144661 B

DIREKTORATET FOR PATENT- OG VAREMÆRKEVÆSENETDIRECTORATE OF THE PATENT AND TRADEMARKET SYSTEM

(21) Ansøgning nr. 3750/72 (51) |nt.CI.3 E 02 0 21/00 (22) Indleveringsdag 28. jul. 1972 E 02 B 17/00 (24) Løbedag 28. jul. 1972 (41) Aim. tilgængelig 1. feb. 1973 (44) Fremlagt 3. maj 1982 (86) International ansøgning nr. -(86) International indleveringsdag (85) Videreførelsesdag -(62) Stamansøgning nr. -(21) Application No. 3750/72 (51) | nt.CI.3 E 02 0 21/00 (22) Filing date 28 Jul. 1972 E 02 B 17/00 (24) Race day 28 Jul. 1972 (41) Aim. available Feb 1 1973 (44) Submitted May 3, 1982 (86) International Application No. - (86) International Filing Day (85) Continuation Day - (62) Stock Application No. -

(30) Prioritet 31 . jul. 1971, 27023/71, IT(30) Priority 31. Christmas. 1971, 27023/71, IT

(71) Ansøger TECNOMARE S.P.A., Venezia, IT- (72) Opfinder Umberto Magnanini, IT.(71) Applicant TECNOMARE S.P.A., Venezia, IT- (72) Inventor Umberto Magnanini, IT.

(74) Fuldmægtig internationalt Patent-Bur eau.(74) International Patent Office.

(54) Svømmedygtig platform, navnlig til anvendelse på store hav= dybder.(54) Swim platform, especially for use at high seas = depths.

Opfindelsen angår en svømmedygtig platform, der ved nedsænkning kan bringes til at hvile mod havbunden, navnlig hvor havdybden er stor, med en arbejdsbro og en tårnkonstruktion, der bærer broen i afstand over havoverfladen, og som er udført som en gitterkonstruktion, der udvider sig nedad, og hvor der i tårnkonstruktionens endeområder forneden på mindst tre steder er anbragt en sænkekasse indrettet til at hvile mod havbunden i platformens nedsænkede tilstand, ® og en stabiliseringssøjle, som strækker sig opad fra sænkekassen.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a swim platform which can be lowered to the seabed, especially where the depth of the sea is submerged, with a working bridge and a tower structure which carries the bridge at a distance above the sea surface, and which is designed as a downwardly extending grid structure. and where a lower box is arranged in the end areas of the tower structure at the bottom of at least three places adapted to rest against the seabed in the submerged state of the platform, ® and a stabilizing column extending upwards from the lower box.

q Fra DE-OS nr. 1.923.069 kendes der en platformkonstruktion af Ω forannævnte type. Denne konstruktion kan imidlertid kun anvendes med j· t 3 -j. tilfredsstillende resultat, hvis havbunden er absolut plan, og der “ praktisk taget ikke forekommer bundstrømninger. Den kendte platform 2 144661 har en tårnkonstruktion, der forneden går over i en bred støtte- eller svømmer ing, og et svømme- og stabiliseringsbeholderarrangement, der skal fjernes, når platformen er anbragt på plads.q DE-OS No. 1.923.069 discloses a platform construction of the aforementioned type. However, this construction can only be used with j · t 3 -j. satisfactory result if the seabed is absolutely flat and there are "virtually no bottom currents. The known platform 2 144661 has a tower structure which is lowered into a wide support or swimmer, and a swimming and stabilizing container arrangement to be removed when the platform is placed in place.

Med denne udformning kommer platformkonstruktionen til at ligge an mod havbunden over et meget bredt område. Konstruktionen er også understøttet i sit centrale område ved hjælp af en søjle, men dette resulterer snarere i, at der opstår en kippeeffekt, end at der dannes en ekstra understøtning. Konstruktionen er desuden indsnævret stærkt i sit centrale område.With this design, the platform structure will abut the seabed over a very wide area. The structure is also supported in its central area by means of a column, but this results in a tipping effect rather than an additional support being formed. In addition, the construction has narrowed strongly in its central area.

Den kendte platformkonstruktion har altså ikke nogen egentlig frihøjde, . og konstruktionen vil kun kunne anvendes med godt resultat, når der foreligger ganske bestemte bundforhold.Thus, the known platform construction does not have any actual ground clearance,. and the construction can only be used with good results when there are very specific bottom conditions.

Opfindelsen tager sigte på at udforme den indledningsvis omhandlede platformkonstruktion på en sådan måde, at der opstår et frit rum under konstruktionens centrale område, og at konstruktionen selv ved mindre gunstige bundforhold muliggør en sådan reduktion af påvirkningerne i bundområdet, at man undgår skadelige sætninger. Der tilsigtes endvidere at udforme konstruktionen således, at man praktisk taget helt undgår uheldig indflydelse hidrørende fra udvaskninger og dannelsen af dybe områder i havbunden.The invention aims to design the platform structure initially referred to in such a way that a free space is created below the central area of the structure, and that even under less favorable bottom conditions, the construction allows such reduction of the influences in the bottom area to avoid harmful phrases. Furthermore, it is intended to design the structure so as to practically completely avoid undue influence resulting from leaching and the formation of deep areas in the seabed.

Til opnåelse heraf er platformen ifølge opfindelsen ejendommelig ved, at hver sænkekasse dels er forbundet med tårnkonstruktionen via et pyramideformet støtteelement, der strækker sig skråt opad fra sit forbindeisessted med sænkekassen, og dels er anbragt på en bæredel, der udgør bunden i sænkekassen, og som har en konisk opad tilspidsende bundflade, at hver sænkekasse har en nedadragende skørtdel, der er udformet med skær forneden, og at der på ydersiden af hver sænkekasse er anbragt en rundgående støttering i afstand over skørtdelens skær.In order to achieve this, the platform according to the invention is characterized in that each sink box is partly connected to the tower structure via a pyramid-shaped support element extending obliquely upwards from its connecting point with the sink box, and partly mounted on a support part which forms the bottom of the sink box and which has a tapered upwardly tapered bottom surface, that each lower box has a downwardly extending skirt portion formed with a cutter at the bottom, and that a circular support ring is spaced apart on the outside of each skirt portion.

Med udformningen ifølge opfindelsen opnår man en platformkonstruktion, der som forklaret i det følgende har væsentlige tekniske fordele i sammenligning med den kendte konstruktion.With the design according to the invention one obtains a platform construction which, as explained below, has significant technical advantages in comparison with the known construction.

Platformens tårnkonstruktion, der er udført som en ren gitterkonstruktion med et i hovedsagen trekantformet tværsnit, udvider sig nedad svarende til de statisk voksende påvirkninger og går derefter på en særlig elegant måde over i tre pyramideformede støtteelementer, der har deres spidser forbundet med sænkekasserne. Med denne udformning opnår man en konstruktion, der sikrer en uhindret gennemstrømning af vand ved vilkårlig strømningsretning, idet konstruktionen har den største frihøjde i sit centrale område på det sted, hvor 144661 3 basisdelene af de pyramideformede støtteelementer støder op til hinanden. I kraft af, at hver sænkekasse er forbundet med et pyramideformet støtteelement udført som trebens-element, opstår der desuden særligt gunstige forhold under platformens løftning, idet man så at sige helt undgår at skulle spule støtteelementerne fri.The tower construction of the platform, which is designed as a clean grid structure with a generally triangular cross-section, extends downward corresponding to the statically growing stresses, and then in a particularly elegant manner, transitions into three pyramid-shaped support members having their tips connected to the lower boxes. With this design, a structure is obtained which ensures an unobstructed flow of water at any flow direction, the structure having the greatest ground clearance in its central area at the location where the base parts of the pyramid-shaped supporting elements abut one another. Furthermore, because each lower box is connected to a pyramid-shaped support element made as a three-legged element, particularly favorable conditions arise during the lifting of the platform, so as to avoid completely flushing the support elements.

Man opnår endvidere en fordelagtig fundamentering af tårnkonstruktionen via støtteelementerne i kraft af de ved enderne af disse anbragte sænkekasser. Sænkekassernes skørtdele, der er udformet med skær forneden, graver sig nemlig ned i undergrunden, hvortil kommer, at de rundgående støtteringe har en dobbeltfunktion, idet de dels virker til yderligere sikker understøtning af sænkekasserne, og dels hindrer udvaskning i området af sænkekasserne - især i det sugeområde, der opstår under sænkekasserne - og ydermere hindrer udvaskning i området af skørtdelene. Skørtdelene behøver altså kun at udøve en ren skære- og understøtningsfunktion, idet støtteringene udover at udøve deres bærefunktion sikrer mod udvaskning.Furthermore, an advantageous foundation of the tower structure is obtained via the supporting elements by virtue of the lower boxes placed at the ends of these. The skirt parts of the lower boxes, which are designed with a cut bottom, are dug into the underground, in addition to which the circular support rings have a double function, in that they both serve to further secure support of the lower boxes and partly prevent leaching in the area of the lower boxes. the suction area that occurs under the sink boxes - and further prevents leaching in the area of the skirt parts. Thus, the skirt parts need only perform a clean cutting and support function, since the support rings, in addition to exercising their carrying function, protect against leaching.

Med udformningen ifølge opfindelsen opnår man ved størst mulig frihøjde en betydelig standflade ved trebens-understøtning.With the design according to the invention, a considerable stand surface is obtained at three-leg support at the greatest possible height.

Ifølge opfindelsen kan et eventuelt rum mellem den koniske bundflade og havbunden hensigtsmæssigt være udfyldt med beton, idet der herved opnås et reduceret fladetryk.According to the invention, any space between the conical bottom surface and the sea floor may conveniently be filled with concrete, thereby providing a reduced surface pressure.

Opfindelsen forklares nærmere i det følgende under henvisning til tegningen, hvor fig. 1 viser et perspektivbillede af en foretrukken udførelsesform for platformen ifølge opfindelsen, fig. 2 platformen set fra siden, fig. 3 platformen set fra oven, og fig. 4 et til platformen hørende ben, som støtter mod havbunden.The invention will be explained in more detail below with reference to the drawing, in which fig. 1 is a perspective view of a preferred embodiment of the platform according to the invention; FIG. 2 is a side view of the platform; FIG. 3 shows the platform from above, and FIG. 4 is a leg of the platform supporting the seabed.

Den på tegningen viste stationære platform har to hovedelementer, fig. 2, nemlig en arbejdsbro 1, der er anbragt over vandets frie niveau, og en tårnkonstruktion, der er udført som gitterkonstruktion og består af en brobærekonstruktion 5, 6 og en fodkonstruktion 10. Den i fig. 2 viste brokonstruktion 1 har et nedre gulv 2 og et øvre gulv 3 forbundet med hinanden ved hjælp af gitterelementer 4. Arrangementet omfattende det øvre og nedre gulv tjener dels til optagelse af mandskab, hjælpemidler, konstruktioner, udstyr, laboratorier etc., og dels til udøvelse af aktiviteter af industriel, videnskabelig, teknisk natur, der skal udføres, 4 144661 og som kræver en bærekonstruktion anbragt i afstand fra land på store havdybder.The stationary platform shown in the drawing has two main elements; 2, namely a working bridge 1, which is arranged above the free level of the water, and a tower structure which is designed as a grid structure and consists of a bridge carrier structure 5, 6 and a foot structure 10. The embodiment of FIG. 2, the bridge structure 1 shown has a lower floor 2 and an upper floor 3 connected to each other by means of grid elements 4. The arrangement comprising the upper and lower floors serves partly for the accommodation of personnel, aids, constructions, equipment, laboratories etc., and partly for pursuit of activities of an industrial, scientific, technical nature to be carried out, 4 144661 and requiring a support structure spaced from land at great depths of sea.

Brokonstruktionen 1 er understøttet af den derunder anbragte "bærekonstruktion, der er trekantformet og består af de i fig. 2 viste to sektioner 5 og 6.The bridge structure 1 is supported by the "triangular-shaped" supporting structure which is arranged thereunder and consists of the two sections 5 and 6 shown in Figure 2.

Den direkte under broen anbragte sektion 5 består i hovedsagen af tre rørformede søjler 7, der er forbundet med hinanden ved hjælp af gitterstænger 9. I den nederste sektion 6 udvider de tre rørformede søjler, der er betegnet 8 i fig. 2, sig gradvis og er ligeledes forbundet med hinanden ved hjælp af gitterstænger 9.The section 5 located directly under the bridge consists essentially of three tubular columns 7 which are connected to each other by means of lattice rods 9. In the lower section 6 the three tubular columns, designated 8 in FIG. 2, gradually and are also connected to each other by means of lattice rods 9.

Den nederste sektion 6 støtter mod fodkonstruktionen 10, der består af tre pyramideformede gitterelementer 15, fig. 3, der hver ender i en bæredel 11, som har en konisk opad tilspidsende form, fig. 4.The lower section 6 supports the foot structure 10, which consists of three pyramid-shaped grid elements 15; 3, each ending in a carrier portion 11 having a tapered upwardly tapered shape; FIG. 4th

På hver konusdel er der anbragt en cylindrisk tryksænkekasse 12, fig. 2 og 4, hvis funktion består i at bringe platformen til at flyde, så konstruktionen kan fremstilles i en dok og bugseres frem til installationsstedet.A cylindrical pressure lowering box 12 is arranged on each cone section, fig. 2 and 4, the function of which is to cause the platform to flow so that the structure can be manufactured in a dock and towed to the installation site.

Platformen nedsænkes ved, at man lader trykluft undslippe fra sænkekasserne 12 og samtidig fylder dem med vand.The platform is submerged by allowing compressed air to escape from the sink boxes 12 and at the same time filling them with water.

For at udføre sænkeoperationen på den mest sikre måde anvendes der passende udstyr, der muliggør, at man kontinuerligt kan kontrollere konstruktionens hældning og vandniveauet i sænkekasserne 12, og at man kan fjernbetjene ikke viste snøfte- og fyIdeventiler.In order to carry out the lowering operation in the most secure way, suitable equipment is used which allows continuous control of the slope of the structure and the water level in the lowering boxes 12 and that remote control of the sniff and valve valves can not be operated remotely.

Instrumenteringen er indrettet således, at man kan udføre regulerings- og drivoperationerne i passende afstand fra måleapparaturet og fra de drevne aggregater og/eller eventuelt fra et moderskib.The instrumentation is arranged so that the control and drive operations can be performed at a suitable distance from the measuring apparatus and from the driven units and / or possibly from a mother ship.

I hver sænkekasse 12 er der anbragt en cylindrisk stabiliseringssøjle 13, der tjener til at sikre platformens stabilitet under sænkeoperationerne. Sænkekasserne kan anvendes som nyttigt oplagringsvolumen.Each cylindrical box 12 has a cylindrical stabilizing column 13 which serves to ensure the stability of the platform during the lowering operations. The lower boxes can be used as useful storage volume.

Underkonstruktionen 5, 6 og fodkonstruktionen 10 tjener til at bære den på broen 1 anbragte last samt overføre belastningen til havbunden ved hjælp af de konisk opad tilspidsende bæredele 11.The substructure 5, 6 and the foot structure 10 serve to carry the load placed on the bridge 1 and transmit the load to the seabed by means of the tapered upwardly supporting supports 11.

De nævnte bæringer muliggør opnåelse af det ønskede tryk på havbunden. Deres specielle form tjener desuden til at reducere nævnte tryk, idet man som vist ved 14 i fig. 4 forøger bærefladen ved cementering af konussens frie volumen.Said supports enable the desired pressure on the seabed to be obtained. Their special shape also serves to reduce said pressure, as shown at 14 in FIG. 4 increases the support surface by cementing the free volume of the cone.

Fodkonstruktionens tre gitterelementer 15 fremstilles på forhånd på land og forbindes med hinanden og med platformens bæreelemen-The three lattice elements 15 of the foot structure are made in advance on land and connected to each other and to the platform's supporting elements.

DK375072A 1971-07-31 1972-07-28 SWIMMABLE PLATFORM, SPECIAL FOR USE AT GREAT DEPTHS DK144661C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2702371 1971-07-31
IT2702371 1971-07-31

Publications (2)

Publication Number Publication Date
DK144661B true DK144661B (en) 1982-05-03
DK144661C DK144661C (en) 1982-10-04

Family

ID=11220794

Family Applications (1)

Application Number Title Priority Date Filing Date
DK375072A DK144661C (en) 1971-07-31 1972-07-28 SWIMMABLE PLATFORM, SPECIAL FOR USE AT GREAT DEPTHS

Country Status (7)

Country Link
CA (1) CA976377A (en)
DK (1) DK144661C (en)
ES (1) ES405518A1 (en)
FR (1) FR2194204A5 (en)
GB (1) GB1396415A (en)
NL (1) NL161833C (en)
SE (1) SE400333B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2449029A1 (en) * 1979-02-19 1980-09-12 Doris Dev Richesse Sous Marine Cradle for erection transport and placing offshore structure - formed by bases of structure connected by removable beams and floats simplifying construction by prefabrication
US4339899A (en) * 1980-10-28 1982-07-20 A. B. Chance Company Adjustable connector for coupling tower leg to foundation support anchor
SE440804B (en) * 1981-01-26 1985-08-19 Klas Heyman BED OF FRICTION MATERIAL ESTABLISHABLE STOCK CONSTRUCTION
NL193498C (en) * 1985-04-18 1999-12-03 Marine Structure Consul Foundation pole for a jack-up platform.
GB8907432D0 (en) * 1989-04-03 1989-05-17 Lee Malcolm Offshore platform recovery and re-use unit
GB9321078D0 (en) * 1993-10-13 1993-12-01 Kvaerner Earl & Wright Offshore tower structure and method of installation
GB0704897D0 (en) * 2007-03-14 2007-04-18 Rotech Holdings Ltd Power generator and turbine unit
ES2617991B1 (en) * 2017-02-14 2018-03-27 Berenguer Ingenieros S.L. MARITIME STRUCTURE FOR THE FOUNDATION BY GRAVITY OF BUILDINGS, FACILITIES AND AEROGENERATORS IN THE MARINE ENVIRONMENT

Also Published As

Publication number Publication date
ES405518A1 (en) 1975-09-01
FR2194204A5 (en) 1974-02-22
NL7210384A (en) 1973-02-02
DE2235258A1 (en) 1973-02-15
DK144661C (en) 1982-10-04
DE2235258B2 (en) 1976-10-28
CA976377A (en) 1975-10-21
AU4405572A (en) 1974-01-03
NL161833C (en) 1980-03-17
SE400333B (en) 1978-03-20
GB1396415A (en) 1975-06-04
NL161833B (en) 1979-10-15

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