OA10370A - Method and apparatus for installing a hollow suction pile in the bottom of a body of water - Google Patents

Method and apparatus for installing a hollow suction pile in the bottom of a body of water Download PDF

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Publication number
OA10370A
OA10370A OA60865A OA60865A OA10370A OA 10370 A OA10370 A OA 10370A OA 60865 A OA60865 A OA 60865A OA 60865 A OA60865 A OA 60865A OA 10370 A OA10370 A OA 10370A
Authority
OA
OAPI
Prior art keywords
pile
pressure
interior
vessel
water
Prior art date
Application number
OA60865A
Inventor
Johannes Rudolf Hogervorst
Original Assignee
Johannes Rudolf Hogervorst
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.)
Filing date
Publication date
Application filed by Johannes Rudolf Hogervorst filed Critical Johannes Rudolf Hogervorst
Publication of OA10370A publication Critical patent/OA10370A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/24—Anchors
    • B63B21/26—Anchors securing to bed
    • B63B21/27—Anchors securing to bed by suction
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/52—Submerged foundations, i.e. submerged in open water
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/28—Placing of hollow pipes or mould pipes by means arranged inside the piles or pipes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/0073—Details of sea bottom engaging footing
    • E02B2017/0078—Suction piles, suction cans
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00—Production methods
    • E02D2250/0053—Production methods using suction or vacuum techniques

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

During the installation of a hollow suction pile (1) in the bottom of a body of water, the pile is lowered onto the bottom and the pressure in the interior (6) of the pile (1) is reduced shockwise a number of times until the pile (1) has penetrated the bottom (2) to the required depth. For the shockwise reduction of the pressure, the interior (6) of the pile (1) is brought into connection with a room wherein an under-pressure has been created, the room forming part of an apparatus (7) which is mounted on the hollow pile (1). The relevant room is subjected to an under-pressure by closing it and evacuating the water present therein by pumping.

Description

I ' 010370
Method and apparatus for installing a hollow suction pilein the bottom of a body of water.
The invention relates to a method for installing ahollow suction pile in the bottom of a body of water, inwhich the pile is lowered onto the bottom, the pressureinside the pile is reduced, causing the pile to penetrate 5 the bottom and a column of soil material to penetrate theinterior of the pile. A method of this type is known from the Eurcpeanpatent spécification 0 011 894. In this known method thepressure inside the pile is reduced by continuously 10 evacuating water from the interior of the pile, usina apump connected to the suction pile, until the pile haspenetrated the bottom to the required depth. Drawbacks ofthis known method are that, with certain soii types crcompositions, it is possible that as a resuit of the 15 reduced pressure inside the pile, there is an inflow of water into the interior of the pile passing via the bottomand under the lower rim of the pile and/or that soilupheavel inside the pile occurs due to the internai rupturealong interfaces. In the first case the under-pressure 20 created inside the suction pile is partly nullified, and inthe second case soil upheavel results in soil fmding itsway into the pump, which becomes silted up.
The présent invention aims at a method forinstalling a hollow suction pile in a body of water, in 25 which these drawbacks do not occur.
This aim is achieved by means of a method of the type mentioned at the beginning, which is characterized bythe steps of: a) creating an under-pressure in a roora separate from the 30 pile (1) b) bringing the separate roon with under-pressure inconnection with the interior (6) of the pile (1),causing a shockwise réduction of the pressure m theinterior of the pile, 35 c) after uiosing the :onnecticn between the separate roonand the interior o: the bile, recearimi tne steos a; 1Û 15 20 25 30 010370 and b) a number of times until the pile (1) haspenetrated the bottom to the required depth.
The shockwise réduction of pressure inside thepile prevents water inflow to the interior of the pile viathe bottom and under lower rim of the pile. With eachshockwise réduction of the pressure in the interior of thepile, the pile will, as a resuit of the overpressureexerted on the pile head, be driven into the bottom over acertain lenght without occurrence of soil rupture alonginterfaces.
The invention also relates to apparatus forcarrying out the method according to the invention, whichapparatus is characterized by comprising at least onevessel, a connection pipe between the vessel and thesuction pile for connecting the interior of the vessel withthe interior of the suction pile, a first valve for closingand opening the connection pipe, and a means for creatingan under-pressure in the interior of the vessel.
Preferred embodiments of the method and apparatusaccording to the invention are laid down in the claims 2and 3 to 10, respectively.
The invention further relates to a suction pile asdefined in claim 11.
The invention is explained further in thefollowing example of embodiment with reference to theenclosed drawing, in which:
Fig. 1 shows very schematically in longitudinal section asuction pile which has partly penetrated thebottom of a body of water, and with an apparatusfor driving the suction pile into the bottommounted thereon,
Fig. 2 shows schematically a certain embodiment of an apparatus according to the invention for drivingthe suction pile into the bottom, mounted on asuction pile,
Fig. 3 is a top view of the apparatus of fig. 2, andFig. 4 shows schematically another embodiment of apparatus according to the invention.
Fia shows very scnema whicr. has 35 3 0 1 0370 partly penetrated a bottom 2 under a watersurface 10. Thesuction pile 1 consists of a tubular body 3, which isclosed at the top by a cap 4 and provided at the bottomwith a cutting edge 5 to facilitate driving into thebottom. A suction pile of this type is driven into thebottom 2 by reducing the pressure in the interior 6 of thesuction pile 1 by evacuating water from it. The driving-inoperation can be carried out with a very schematicallyshown apparatus 7, which is in connection with the interior6 of the suction pile 1 via a pipe 8. By reducing thepressure in the interior 6 of the suction pile 1, apressure différence is created between the interior 6 ofthe suction pile 1 and the watermass surrounding thesuction pile, causing a downwards force on the cap 4, whichdrives the suction pile 1 into the bottom 2. The apparatus7, which is preferably constructed as a unit, is connectedwith a hoisting cable 9 with which the apparatus 7, whetheror not in combination with the suction pile 1, which isdetachably connected to the apparatus 7, is lowered from aboat or barge and with which the apparatus 7, after drivingthe suction pile 1 into the bottom 2, is lifted again.
Figs. 2 and 3 show in more detail a certainerabodiment of the apparatus 7 for driving a suction pile 1into the bottom 2 of a body of water, mounted on a suctionpile 1. The apparatus 7 comprises in the embobinent shownthree vessels 11 and a pump 12. Each of the vessels 11 isvia a connection pipe 13 in connection with a chamber 14 atthe suction side of the pump 12. Via the chamber 14 theconnection pipes 13 are in connection with the pipe 8,which runs to the interior 6 of the suction pile 1. In thepipe 8 a first valve 15 is installed, with which the pipe Scan be closed or opened.
The pump 12 is furthermore provided with an outlet16, in which a second valve 17 is installed for closing andopening the outlet 16. Each vessel 11 is provided at thetop with an opening 19 which can be closed by a third valve18, via which opening the interior of the vessel 11 can bebrought into direct connection with the environnent.
The apparatus is turther provided with a contre* ’i—1'Λ 010370 and connection box 20 in which means (not further shown)for controlling the various valves and the pump 12 hâvebeen accommodated. The various Unes for energy supply andcontrai are not further shown in the drawing. The hoistingcable 9, in which also a supply line can be integrated, isconnected with the control and connection box 20·
The apparatus 7 is connected with the suction pile1 with the aid of three cables 21, which run from thebottom of the control and connection box 20 to three points22, distributed over the circumference of the suction pile 1. The connection of the three cables 21 with a suspensionlug 23 at the bottom of the control and connection box 20can be uncoupled.
The apparatus 7 can furthermore be surrounded by aprotection cage (not further shown here).
During installation of the hollow suction pile 1in the bottom 2 of a body of water with the aid of theapparatus 7 according to the invention the workingprocedure is as follows.
After on a boat or barge (not shown here) theapparatus 7 has been connected by means of cables 21 withthe suction pile 1, whereby a towards the environmentclosed connection pipe 8 between the apparatus 7 and theinterior 6 of the suction pile 1 has been achieved, and thehoisting cable 9 is connected with the control andconnection box 20, the whole unit is lowered from the boator barge. During lowering ail valves 15, 16 and 18 are open, until the cap 4 of the suction pile 1 is under water.Subsequently ail valves 15, 16 and 18 are closed. Thevessels 11 are at this stage still filled with air andfunction during further lowering of the unit as a buoy forstabilizing the suction pile 1.
As soon as the pile 1 touches the bottom 2 withthe lower rim 5, ail valves are opened again. The airprésent in the vessels 11 will escape via the openings 19,while water will enter the vessels 11· The pile 1 will thenpenetrate the bottom 2 over a certain length under its ownweight.
Then the valves 15 and 13 are closed and the pump 0 1 037 0 12 is staried. The pump 12 pumps the water :ro~ the vesseisil resuitmg in an onaer-pressure «ith respect to theenvironment being created in the vessels il . After acertain time, or vhen a certain under-pressure nas been réalisée m the vessel: the valve 17 in the outiet 16 of stoüned. Hereafter the pump 12 is closed and the pumpthe valve 15 is opened, preferably in a very short tune(suddendly). As a resuit of the prevailing pressuredifférence between the interior 6 of the pile 1 and the10 interior of the vessels il, water will flow at a high ratefrom the interior 6 of the pile 1 via the pipe 3 and theconnection pipes 13 to the vessels 11, causing a shockwiseor mstantaneous réduction of the pressure insice the pile 1 and a downwards directed impact force on the cap 4 of the15 pile l. As a resuit the pile is driven turther mto the bottom 2.
At the moment the pile 1 does not penetrate thebottom 2 any turther, the valve 15 is closed, the valve 1"opened and the pump 12 is started aqain, causing water 20 being puraped from the vessels 11 again and these vesselsbecoming subject to an onder-pressure aqam.
The above descrioed steps m emptymg the vessels11 and the shockwise réduction of the pressure m theinterior or the pile 1 sy ailowmg water to flow from the 25 interior 5 o: the pi.e to to.·'? vessels 11 wn:co are subject to an under-pressure, are repeated so often untiithe required pénétration aeptn ot the pile 1 m the bottom 2 has been rcached. Finally the connection between thecables 21 and the suspension lug 23 on the control and 30 connection box 20 as uncoupled and the apparatus 7 is lifted on board aqain toy means of the hoistmq cable 9.
Instead of jointly iowermg the apparatus and thesuction pile 1, it is also possible first to piace thesuction mie 1 en th<· sottom. l. o.nd thon to lower the 35 apparatus ~ .ma to correct it oo.aer water wito. t.te suction. pîle air aid of a aooaratu; mao! ve ; ïxampi” '· m.aerw.iti the -.1 . * . .. lA £ b Vi il* 010370
Fig. 4 shows another embodiment of the apparatus 7according to the invention. For parts which correspond withParts of the apparatus shown in figure 2 and 3 the samereference numbers hâve been used. 5 The embodiment of fig. 4 differs from that of figs. 2 and 3 in that in this embodiment oniy one vessel 11is applied and the pump 12 is located inside this vessel.This gives some différences in construction.
The vessel 11 is mounted direct on the suction10 pile l, whereby the connection 3 is realized. The cables 21 extend from the connection points 22 with the suction pile1 to connection points 24 which hâve been provided at thetop of the vessel 11, distributed over its circumference.Near the connection points 24, détachable couplings 25 hâve 15 been provided between these connection points and thecables 21.
The pump 12 is mounted inside the vessel 11 in atube 26 running from the bottom to the top of the vessel11. The tube 26 links up at the bottom with the connection 20 pipe 8 and is near the bottom provided with openings 27,through which the interior of the vessel is in connectionwith the suction side of the pump 12. The top end of thetube 26 is in connection with the environment and thusforas the outlet 16 of the pump 12. Here, too, a second 25 valve 17 has been incorporated m the outlet 16.
Furthermore the vessel 11 is provided at the top with an opening 19 which can be ciosed with a third valve18 .
The control and connection box 20 is mounted on 30 top of the vessel 11 via an intermediate part 29, providedwith openings 28.
The operation of the apparatus 7 of fig. 4 is thesanie as of the apparatus of figs. 2 and 3. it will be clear that also embodiments of the 35 apparatus according to the invention with another number (twc, tour or more) or vessels 11· are possible.
It is also possible to connect the pump to the vessel· or vessels m another way. lise ot.oer near. s :or ireatmo an under-cressure - ‘ - 0 1 037 0 in the vessel or vessels can be used.
The suction pile can be extracted fro= the botton by means of an apparatus (not shown) which can be connectedto the opening at the top of the suction pile and which isadapted to increase the pressure in the interior of thepile. Such an apparatus can be mounted on the suction pilein the saine way as the apparatus for driving the pile intothe bottom.

Claims (8)

  1. 010370 C L A I M S
    1. Method for installïng a hollow pile in the bottom of abody of water, in which the pile is lowered onto the bot-tom, the pressure inside the pile is reduced, causing thepile to penetrate the bottom, and a column of botton mate- 5 rial to penetrate the interior of the pile, characterizedby the steps of: a) creating an under-pressure in a room separate fron thePüe (1) , b) bringing the separate room with under-pressure in 10 connection with the interior (6) of the pile (1) , causing a shockwise réduction of the pressure in theinterior of the pile, c) after closing the connection between the separate roomand the interior of the pile, repeating the steps a) 15 and b) a number of times until the pile (1) has pene- trated the bottora to the required depth.
  2. 2. Method according to claim 1, characterized in that theunder-pressure in the separate room is created by closingthe room and pumping ont the water présent therein.
  3. 3. Combination of a hollow pile and an apparatus for driving the pile into the bottera of a body of water, cha- racterized in that the apparatus comprises at least onevessel (il- separate from the pile, a connection pipe (8, 13) between the vessel and the pile (1) for connecting the 25 interior of the vessel (11) with the interior (6) of thepile (1), a first valve (15) for closing and opening theconnection pipe (8, 13), and a raeans for creating an under-pressure in the interior of the vessel (11).
    2. Combination according to claim 3, characterized in 30 that the means for creating an under-pressure in the vessel (11) comprises a pump (12) which can be brought in connec- tion with 'me ..nterior of the vessel (11) for emptying the vessel il.' , , .ed : se-’ond valve · 1 " 'i for closing a connec- 0 1 037 0 Ο tion channel running via the pump (12) bet*een the interiorof the vessei and the environment.
  4. 5. Combination according to claim 4, characterized inthat the apparatus comprises means (20) for cor.trolling the 5 valves (15, 17) and the pumps (12).
  5. 6. Combination according to one of daims 3-5, characte-rized in that each vessei (11) is provided at the top wrthan opening (19) capable of being closed by a third valve(18) through which opening (19) the intericr of the vessei 10 (11) can be brought into direct connection with the envi- rc nment.
  6. 7. Combination according to me ot. daims characte- rized in that the apparatus is consr.ructetl as a unit ('·') towhich a pile (1) is suspended or r.ountcd.
  7. 8. Combination -according to daim 7, characterized :n that the unit (7) is connectée! with the pile by means of adetachab le coup 1 ing il!, 2 2 , 2 , 2 . o. Combinat;un ico; n *·hat d.r on : ‘ · 0 noist. inq
  8. 10. Combination according toracterized i.n tirât tne »ppa r ata;tion cage. ar a eter;ze•ttachir.g si the cl.-.ims 3-9, cha-;.-,urrounded by a protec-
OA60865A 1994-01-21 1996-07-19 Method and apparatus for installing a hollow suction pile in the bottom of a body of water OA10370A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL9400101A NL9400101A (en) 1994-01-21 1994-01-21 Method and device for installing a hollow suction pole in the bottom of a water.

Publications (1)

Publication Number Publication Date
OA10370A true OA10370A (en) 2001-11-20

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ID=19863729

Family Applications (1)

Application Number Title Priority Date Filing Date
OA60865A OA10370A (en) 1994-01-21 1996-07-19 Method and apparatus for installing a hollow suction pile in the bottom of a body of water

Country Status (7)

Country Link
AU (1) AU1426895A (en)
BR (1) BR9506637A (en)
GB (1) GB2300661B (en)
NL (2) NL9400101A (en)
NO (1) NO962876D0 (en)
OA (1) OA10370A (en)
WO (1) WO1995020075A1 (en)

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US5704732A (en) * 1995-11-29 1998-01-06 Deep Oil Technology Incorporated Deep water piling and method of installing or removing
US5951207A (en) * 1997-03-26 1999-09-14 Chevron U.S.A. Inc. Installation of a foundation pile in a subsurface soil
AU725166B2 (en) * 1997-04-02 2000-10-05 Olav Hamre Position penetrated anchor system
NO971478D0 (en) 1997-04-02 1997-04-02 Norwegian Anchoring Technology Method for establishing and connecting and disconnecting positioned point fixings into varying subsea formations, as well as equipment for such
NO311624B1 (en) * 1997-05-21 2001-12-17 Norsk Hydro As Device for anchor down of seabed
US6719496B1 (en) 1997-11-01 2004-04-13 Shell Oil Company ROV installed suction piles
NZ507939A (en) 1998-04-02 2002-08-28 Suction Pile Technology B Marine structure with suction piles for embedment into the sub-sea bottom
EP1076625B1 (en) 1998-05-06 2005-02-23 Suction Pile Technology B.V. Sea anchor and method for its deployment
GB9818995D0 (en) * 1998-09-02 1998-10-21 Baross John S Suction pile or suction anchor installable without pump
GB9822769D0 (en) * 1998-10-20 1998-12-16 Duggan Marine Equip Ltd Method and apparatus
US6481932B1 (en) 1999-11-18 2002-11-19 Suction Pile Technology B.V. Marine structure
WO2002088475A1 (en) 2001-04-26 2002-11-07 Suction Pile Technology B.V. Marine structure
CN1317160C (en) * 2002-02-26 2007-05-23 天津市海王星海上工程技术有限公司 Self-installed suction anchor
NL2004212C2 (en) 2009-02-09 2011-01-20 Suction Pile Technology B V Floating marine structure with suction piles and platform resting on a barge clamped between suction piles and platform.
NL2005370C2 (en) 2009-12-09 2011-07-14 Suction Pile Technology B V Floating marine structure with suction piles and vessel.
NL2007833C2 (en) 2010-11-22 2012-07-05 Suction Pile Technology B V Method of installing a high above the sea projecting slender offshore tower with suction pile foundation.
NL2011860B1 (en) 2012-11-29 2016-05-18 Suction Pile Tech B V Double top suction pile and suction pile foundation.
CN103603364B (en) * 2013-11-13 2017-01-11 上海利策科技股份有限公司 Deepwater suction-type gravity foundation and deepwater mounting device and deepwater mounting method thereof
DE102014015801A1 (en) * 2014-10-24 2016-04-28 Hab Hallen- Und Anlagenbau Gmbh suction anchors
NL2018568B1 (en) 2016-03-24 2021-10-14 Spt Equipment B V Suction pile re-float provision.
NL2018650B1 (en) 2016-04-05 2018-03-09 Spt Equipment B V SCOUR PROTECTION FOR SUCTION PILE, e.g. PILE LOWERTNG OPERATED
NL2018702B1 (en) 2016-04-13 2020-12-02 Spt Equipment B V Suction pile pump device
NL2019701B1 (en) 2017-10-10 2019-04-15 Spt Equipment Bv Off shore wind energy installation foundation system.
NL2023942B1 (en) 2019-10-02 2021-06-11 Spt Equipment Bv Eccentric suction pile pump with hinged lift appliance.
WO2021066657A1 (en) 2019-10-03 2021-04-08 Spt Equipment Bv Suction-type ocean-floor wellhead
CN114746609A (en) 2019-10-09 2022-07-12 Spt设备有限公司 Serving a group of suction buckets simultaneously
NL2024228B1 (en) 2019-11-12 2021-07-28 Spt Equipment Bv Simultaneous servicing a group of suction buckets.
NL2028088B1 (en) 2020-04-29 2022-06-03 Spt Equipment Bv Concrete connector body for an offshore wind turbine.
NO347333B1 (en) * 2021-12-14 2023-09-18 Subsea 7 Norway As Installation and removal of subsea foundations
GB2613802A (en) * 2021-12-14 2023-06-21 Subsea 7 Norway As Installation and removal of subsea foundations
CN114228907B (en) * 2021-12-28 2022-11-22 中国石油大学(华东) Vacuum fish-and-thunder anchor capable of solidifying soil body and installation method thereof

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US3817040A (en) * 1972-07-03 1974-06-18 E Stevens Pile driving method
US4257721A (en) * 1979-04-30 1981-03-24 Haynes Harvey H System for placement of piles into the seafloor
US4575282A (en) * 1984-06-04 1986-03-11 Pardue Sr James H System for driving open end pipe piles on the ocean floor using pneumatic evacuation and existing hydrostatic pressure

Also Published As

Publication number Publication date
GB9614428D0 (en) 1996-09-04
NL9520005A (en) 1996-11-01
BR9506637A (en) 1997-09-16
NO962876L (en) 1996-07-08
NL194169C (en) 2001-08-03
AU1426895A (en) 1995-08-08
NL9400101A (en) 1995-09-01
NO962876D0 (en) 1996-07-08
WO1995020075A1 (en) 1995-07-27
GB2300661A (en) 1996-11-13
NL194169B (en) 2001-04-02
GB2300661B (en) 1997-07-30

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