Classifications

• • 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
  • E02D15/00—Handling building or like materials for hydraulic engineering or foundations
  • E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
  • E02D15/06—Placing concrete under water
• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
  • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
  • E02D5/22—Piles
  • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
  • E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil

Definitions

• the present invention relates to a device for producing columns of material in the soil, in particular in the bottom of waters, e.g. at the sea bottom.
• a device with a deep vibrator for the production of material columns in the ground is known for example from DE 197 07 687 Cl.
• 198 14 021 AI describes a device for producing material columns in the ground, which has a deep vibrator and an extension tube connected to the deep vibrator, which can be subjected to an excess pressure.
• a lock chamber At the top of the extension tube is a lock chamber, which has a first closure that is between the lock chamber and the
• Extension tube is arranged, and which has a second closure on a side facing away from the extension tube.
• the material to be introduced into the ground for example concrete or gravel, passes via the second closure into the first lock chamber, from where, when the first and second closures are closed, it enters the extension tube which is under pressure.
• the overpressure in the extension tube serves to counteract a water pressure at the tip of the deep vibrator and thereby to apply the material at the tip of the vibrator.
• Deep vibrators of this type are also referred to as lock vibrators.
• the present invention has for its object to provide a device for the production of material columns in the bottom of water, in particular in water ' with great depths. This object is achieved by a device according to the features of claim 1.
• Advantageous embodiments of the invention are the subject of the dependent claims.
• the device according to the invention has a first and a second material tank, which are connected to one another, and a deep vibrator for discharging material into the ground, which is connected to the second material tank.
• a first closure is arranged between the first and second material tanks.
• a first supply line for supplying material and a second supply line or a pressure compensation line for effecting pressure compensation in the first material are connected to the first material tank.
• the first feed hose serves to convey the material to be introduced into the ground from a reservoir on the water surface, for example on a ship, under pressure into the first material tank.
• the second hose which is preferably also led up to the water surface, enables pressure compensation between the air pressure on the water surface and the first material tank.
• the pressure in the first supply line for supplying the material, for example gravel or concrete must therefore only be selected to be sufficiently high to convey the material at a sufficient speed at atmospheric air pressure. This pressure is usually less than 7.5 bar.
• the ambient pressure of the first material tank in the water is irrelevant.
• the compressor is also connected to the first material tank, as a result of which a pressure can be built up in the first material tank after the first and second closures have been closed, which pressure corresponds to the pressure in the second material tank equivalent.
• the supports of the first closure between the first and second material tanks which are designed, for example, as sliders, are relieved when the first closure is opened. This is particularly useful and may be necessary when working at great depths and a correspondingly high pressure in the second material tank is required to discharge the material.
• the first material tank has a first chamber, into which the first and second feed lines open, and a second chamber, a further closure being arranged between the first and second chambers and the first closure being between the second Chamber of the first material tank and the second material tank is arranged.
• the further closure is thus arranged between the first and second feed lines and the second chamber of the first material tank. Closures between each of the supply lines and the first material tank can be dispensed with in this embodiment.
• the first chamber of the first material tank is permanently under atmospheric pressure, which is generated by the pressure compensation line.
• the second chamber of the first material tank which is separated by the further closure of the first chamber acts as a pressure lock, and further closure is closed, the first shutter ⁇ ⁇ is in thetientbrächt during operation material from the first chamber is open. " After the further closure is closed, the material comes out of the second
• the present invention furthermore relates to a method for producing columns of material in the ground according to claims 16 to 20.
• FIG. 1 shows an overall device according to the invention for producing material columns in the floor
• FIG. 2 shows a section of the device according to the invention with a first and second material tank according to a first exemplary embodiment
• FIG. 3 shows a plan view of a displaceable closure element and its actuating device
• FIG. 4 shows a section of the device according to the invention with a first and second material tank according to a second exemplary embodiment
• FIG. 5 shows a plan view of a displaceable closure element and its actuating device according to another embodiment.
• FIG. 1 shows an overall view of a device for introducing columns of material, in particular gravel columns, into the bottom of bodies of water, in particular into the seabed. Columns of this type serve to stiffen a soft bottom layer 14 and are usually driven in depth to a solid bottom layer 15 lying underneath. The consolidation of the seabed is required, for example, for the construction of drilling platforms with foundations on the seabed.
• the device according to the invention is suspended in height by means of a cable 12 on the boom 20 of a cable excavator 2, the cable excavator 2 floating on a pontoon 1 on the water surface 100.
• the device has a first material tank 8 and a second material tank 10, a first closure 9 being arranged between the first and second material tanks 8, 10.
• a conveying tube 10a adjoins the second material tank 10 at the bottom, at the end of which a deep vibrator 11 is arranged, wherein material to be introduced into the bottom 14 can be fed via a tube 17 to a vibrator tip 18.
• a first feed line 5 is connected to the first material tank 8 and is connected at one end facing away from the first material tank 8 to a material reservoir 3 with a pressure tank 4, which in the exemplary embodiment is also located on the pontoon 1.
• a snorkel 7 is arranged in the exemplary embodiment, which prevents the entry of water into the supply line 6 and is designed, for example, as a ball valve.
• floats 13a, 13b which consist for example of styrofoam or another material with high buoyancy, are arranged on the feed lines 5, 6.
• any other measures are conceivable to close the end of the pressure compensation line 6 above the water surface facing away from the first material tank 8 hold. This end can, for example, also be attached to the pontoon above the water surface. There is no need for a ball valve.
• a second closure 16b is provided between the first feed line 5 and the first material tank 8 and a third closure 16a between the second feed line 6 and the first material tank 8.
• the second (air) supply line or pressure equalization line 6 enables the interior of the first material tank 8 to be equalized with the atmospheric pressure at the water surface 100, the first closure 9 between the first and second material tanks 8, 10 preferably being closed.
• the material to be introduced into the ground for example gravel, can be introduced into the first material tank 8 via the first feed line 5.
• the material can be conveyed in the first feed line 5 regardless of the water depth at the same pressure conditions as on land.
• 03 03 0 P ii VD P ii PJ I- 1 rt ff 03 H- LQ 03 Di P rt
• the opening can be slid into the opening 98 of the partition 97 without opening to close the closure, or the opening can at least partially be made to coincide with the opening 98 of the partition to open the closure 9.
• the closure element 90 is hydraulically displaceable.
• two hydraulic units 93, 95 are provided in the example, each of which has a hydraulic cylinder 92, 94, one hydraulic cylinder 92, 94 being attached to one end of the closure element 90.
• FIG. 5 shows a top view of another embodiment, in which the hydraulic units 93, 95 are arranged next to the closure element 90 offset to the direction of movement B.
• Each hydraulic cylinder 92, 94 is coupled to one of the narrow sides of the closure element via a coupling element 92 ', 94'.
• the hydraulic units are designed such that their hydraulic cylinders act on the same narrow side of the closure element 90.
• a method for producing columns of material in the base 14 by means of the device shown in FIG. 2 is briefly explained below with reference to the figure.
• material is pumped under pressure from the reservoir 3, 4 via the first feed line 5 into the first material tank 8.
• a usual pressure for conveying the material in the first feed line 5 is about 3-6 bar.
• circuit 9 between the second chamber 82 of the first material tank 8 and the second material tank 10 is arranged.
• the construction of the further closure 46 corresponds in the illustrated embodiment to the first closure, the construction and mode of operation of which was already explained above in connection with FIGS. 2, 3 and 5.
• the closure also has a partition wall 47 with an opening 48 and a closure element 40 which has an opening 41 and can be displaced in the partition wall by means of hydraulic units 43, 42 and 45, 44.
• the further closure 46 is opened when the first closure 9 is closed in order to introduce material from the first chamber 81 into the second chamber 82 below.
• the further closure 46 preferably remains open until the second chamber is completely filled and is then closed.
• the first closure 9 is opened in order to introduce the material from the second chamber of the first material tank 8 into the second material tank 10 which is under pressure and from there into the ground.
• the amount of material entering the second material tank after the second closure is opened is approximately determined by the volume of the second chamber 82.
• the volume of this second chamber 82 is preferably less than that of the first chamber 81, in order to hold sufficient material in the first chamber 81 for the rapid filling of the second chamber 82 after the further closure has been opened can.
• the same material tongs to be brought into the ground are fed to the second material tank 10, which is advantageous when determining the material that has already been introduced into the ground at a certain point in time.
• the second chamber initially has atmospheric pressure or at least a pressure which is lower than the pressure in the second material tank.
• a first pressure compensation element between the second material is preferably Tank 10 and the second chamber 82 provided, which is shown only schematically in Figure 4 as a line connection 50 with a valve 51.
• This pressure compensation element is used to produce a pressure compensation between the second material tank 10 and the second chamber 82 before the first closure is opened.
• the resulting pressure loss in the second material tank is usually low, since the volume of the second chamber 82 is usually significantly smaller than that of the second material tank 10.
• the pressure in the second material tank 10 is continuously readjusted by the compressor.
• a pressure prevails in the second chamber which is usually significantly higher than atmospheric pressure.
• a pressure compensation element shown schematically in Figure 4 is represented as a line 60 with a valve 61 and which serves to produce a pressure equalization between the first chamber 81 and the second chamber 10 after the second chamber 82 has been emptied and the first closure 9 has been re-closed, before the closure 46 is re-used
• Material feed into the second chamber 82 is opened again. This measure reduces the load on the bearings and the hydraulics of the closure 46.
• closures 9, 46 shown in FIGS. 2 and 4 between the first and second material tanks 8, 10 and between the first and second chambers 81, 82 as closures with displaceable closure elements 90, 40 merely represents one possible embodiment of the closures Of course, any other closures can be used in connection with the invention.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Paleontology (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Mining & Mineral Resources (AREA)
• Life Sciences & Earth Sciences (AREA)
• Civil Engineering (AREA)
• Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
• Bulkheads Adapted To Foundation Construction (AREA)
• Underground Or Underwater Handling Of Building Materials (AREA)
• Revetment (AREA)
• Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
• Pressure Vessels And Lids Thereof (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7661349

Family Applications (1)

Country Status (11)

Families Citing this family (8)

Family Cites Families (6)

• 2000
  • 2000-10-27 DE DE10053427A patent/DE10053427C2/de not_active Expired - Fee Related
• 2001
  • 2001-10-26 PT PT01988804T patent/PT1328687E/pt unknown
  • 2001-10-26 DE DE50114843T patent/DE50114843D1/de not_active Expired - Lifetime
  • 2001-10-26 KR KR1020037005792A patent/KR100801350B1/ko not_active IP Right Cessation
  • 2001-10-26 AT AT01988804T patent/ATE428828T1/de not_active IP Right Cessation
  • 2001-10-26 AU AU2002221769A patent/AU2002221769A1/en not_active Abandoned
  • 2001-10-26 ES ES01988804T patent/ES2325116T3/es not_active Expired - Lifetime
  • 2001-10-26 EP EP01988804A patent/EP1328687B1/fr not_active Expired - Lifetime
  • 2001-10-26 WO PCT/EP2001/012456 patent/WO2002035013A1/fr active Application Filing
  • 2001-10-26 US US10/415,282 patent/US6742555B2/en not_active Expired - Fee Related
  • 2001-10-26 MX MXPA03003660A patent/MXPA03003660A/es active IP Right Grant
• 2003
  • 2003-10-03 HK HK03107152.6A patent/HK1054975A1/xx not_active IP Right Cessation

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