EP3839147A1 - Procédé et dispositif de fabrication d'un élément de mise à la terre dans le sol - Google Patents

Procédé et dispositif de fabrication d'un élément de mise à la terre dans le sol Download PDF

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Publication number
EP3839147A1
EP3839147A1 EP19218232.7A EP19218232A EP3839147A1 EP 3839147 A1 EP3839147 A1 EP 3839147A1 EP 19218232 A EP19218232 A EP 19218232A EP 3839147 A1 EP3839147 A1 EP 3839147A1
Authority
EP
European Patent Office
Prior art keywords
foundation element
removal tool
ground
drilling
hole
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP19218232.7A
Other languages
German (de)
English (en)
Inventor
Michael Ried
Ulli Wiedenmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bauer Spezialtiefbau GmbH
Original Assignee
Bauer Spezialtiefbau GmbH
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 Bauer Spezialtiefbau GmbH filed Critical Bauer Spezialtiefbau GmbH
Priority to EP19218232.7A priority Critical patent/EP3839147A1/fr
Publication of EP3839147A1 publication Critical patent/EP3839147A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
    • 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
    • E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
    • 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
    • E02D7/22—Placing by screwing down

Definitions

  • the invention relates to a method for creating a foundation element in the ground, in which a hole is created in the ground, whereby soil material is crushed and removed by means of a removal tool, and a hardenable material is introduced into the hole to form the foundation element, according to the preamble of Claim 1.
  • the invention also relates to a device for creating a foundation element in the ground, with a driven removal tool, by which soil material can be crushed and removed, an electrical voltage source for generating an electrical voltage between the removal tool and an anode in the ground and a feed device for supplying a hardenable suspension into the hole for forming the foundation element according to the preamble of claim 11.
  • the drilling tool can have a drill pipe or a drilling bucket, which has a relatively large contact area with the surrounding drilling wall.
  • cohesive soils such as clay soils, which have an adhesive property
  • soil material adheres at least in part to an outside of the drilling tool and is torn out of the borehole wall.
  • the borehole wall and thus the foundation element to be created within the borehole can be impaired.
  • the invention is based on the object of specifying a method and a device with which a foundation element of particularly good quality, in particular with regard to the occurrence of undesirable inclusions in soil material, can be created.
  • the method according to the invention is characterized in that at least one electrode is provided in the ground and that at least when the removal tool is pulled out of the ground, the at least one electrode in the ground is connected as an anode to the removal tool by means of an electrical voltage source, which is connected as a cathode whereby a liquid film is formed between the cutting tool and a borehole wall.
  • the invention is based on the knowledge that undesirable inclusions of soil material, which are not mixed homogeneously with the hardenable material, in particular a suspension, can arise in particular when soil material is removed from the soil when the removal tool is withdrawn from the hole in the soil Hole wall is torn and immediately enters the curable material introduced.
  • the invention has recognized that the risk of such defects is higher, the higher the adhesion between the soil material and the removal tool.
  • the invention is based in particular on the knowledge that an adhesion behavior of the soil can be reduced by providing a liquid film between an outside of the removal tool and the adjoining hole wall.
  • this liquid film is brought about by an electroosmosis, in which an electrical voltage is generated between the soil and the removal tool by means of an electrical voltage source.
  • the removal tool which is typically made of a steel material, is connected as a cathode, while the surrounding soil, on the other hand, forms an anode.
  • material or suspensions that typically contain water or are water-based
  • electroosmosis occurs, in which water molecules from a suspension and the surrounding soil increasingly migrate to the cathode, i.e. to the removal tool, while ionized solids increasingly migrate to the anode.
  • an electrical voltage By applying such an electrical voltage to a removal tool according to the invention, at least when withdrawing it from the hole, a weakening of the borehole wall by adhering and tearing out soil material from the borehole wall and thus the risk of defects in the hardenable suspension can be reduced.
  • the application of an electrical voltage can also be applied when creating the borehole and when lowering the removal tool into the ground.
  • a preferred embodiment of the invention consists in that a drilling tool is used as the removal tool, which is driven to rotate about a drilling axis.
  • the drilling axis is preferably directed essentially vertically.
  • the drilling tool comprises a drill pipe.
  • the drilling tool can be formed solely by the drill pipe or the drill pipe can also be provided as a support tube for a further drilling tool, for example a drill auger.
  • the outer drill pipe is preferably connected as a cathode in order to avoid loosening of soil material from the borehole wall at least when the drill pipe is withdrawn.
  • the foundation element is created as a bored pile with a substantially circular cross-section in the ground.
  • a trench wall cutter or a trench wall gripper is used as the removal tool.
  • foundation elements can also be produced which have a cross-section deviating from a circular shape.
  • the foundation element is created as a slotted wall segment with an essentially rectangular cross section.
  • the diaphragm wall segment can be created as part of a diaphragm wall, for example to support an excavation or as part of a cut-off wall, which is created, for example, for a groundwater barrier in the ground.
  • one or more electrode elements can be introduced into the soil in order to apply a voltage.
  • at least one metallic reinforcement element is introduced into the suspension that has not yet hardened in order to form the foundation element.
  • This metallic reinforcement element can in particular be a so-called reinforcement cage, which is formed at least partially from bars made of metal, in particular from a steel material.
  • At least two foundation elements are created in close proximity to one another, with a reinforcement element being connected in a first foundation element or an elongated metal element temporarily arranged therein in the first foundation element as the anode when the second foundation element is created .
  • a reinforcement element being connected in a first foundation element or an elongated metal element temporarily arranged therein in the first foundation element as the anode when the second foundation element is created .
  • corresponding electrode elements can also be inserted in further foundation elements so that these can be used as anode in addition to or as an alternative to the circuit.
  • the soil material removed can be completely discharged from the hole that has been created.
  • a hardenable suspension is then filled in in a so-called two-phase process, which suspension can harden to form the desired foundation element.
  • a particularly expedient variant of the method according to the invention consists in that the removed soil material is partially removed from the hole that has been created.
  • part of the soil material can remain in the hole and form part of the mass which hardens to form the foundation element.
  • the removed soil material remains at least partially in the soil and is mixed in situ to form the hardenable material.
  • a hardenable liquid can be introduced into the hole and mixed there with the removed soil material to form the hardenable suspension.
  • this is provided with a driven removal tool, by means of which ground material can be crushed and removed, an electrical voltage source for generating an electrical voltage between the removal tool and an anode in the ground and a feed device for supplying a hardenable suspension into the hole for forming the foundation element and a feed device for feeding a hardenable suspension into the hole for forming the foundation element.
  • the device has a drilling device.
  • the device can be formed entirely or at least in substantial parts by the drilling device itself.
  • the drilling device preferably has a carrier device with a mast, along which the removal tool is mounted so that it can be moved vertically and driven in rotation about a drilling axis.
  • the carrier device itself can have a mobile undercarriage and an uppercarriage rotatably mounted thereon, to which the mast is attached.
  • the drilling device has an endless worm, a drilling auger, a drilling bucket and / or a drill pipe as the removal tool.
  • other material-removing drilling tools can also be used.
  • the device according to the invention has a trench wall cutter or a trench wall gripper. These can be used to create diaphragm wall segments with a preferably angular cross-section.
  • the voltage source can preferably be a direct current voltage source, in particular a direct current generator or a direct current battery.
  • One or more 12-volt or 24-volt batteries can preferably be provided as the voltage source, which, depending on the soil conditions, can be connected to one another in a series or parallel circuit to generate a desired voltage and / or a desired current between the anode and the cathode to adjust.
  • the feed device can have a feed pump. This can feed material or suspension, in particular a self-hardening suspension, preferably a cement suspension, into the hole in the ground from a reservoir.
  • a feed pump This can feed material or suspension, in particular a self-hardening suspension, preferably a cement suspension, into the hole in the ground from a reservoir.
  • the figure shows a drilling device 10, which has a crawler chassis as an undercarriage 11 and an uppercarriage 12 rotatably mounted thereon having.
  • a substantially vertical mast 13 is articulated on the upper carriage 12, along which a drill drive 14 is movably guided.
  • a drill rod 28 is driven to rotate via the drill drive 14, and a removal tool 30 is attached to its lower end.
  • the removal tool 30 is designed as a cylindrical drilling bucket, through which a hole 3 with a hole wall 4 is created in the ground.
  • the hole 3 is preferably already filled with a suspension 8 as a hardenable material via a feed device 40 with a feed line 42 while the borehole is being created.
  • the suspension 8 can harden in the ground immediately or after the addition of further constituents after the hole 3 has been sunk to a final depth and after the removal tool 3 has been withdrawn to form a foundation element 5.
  • a plurality of foundation elements 5, in particular foundation piles for the foundation of a building, can preferably be created in the ground in close proximity to one another.
  • the device designed as a drilling device 10 is provided with an electrical voltage source 18.
  • One or more electrodes 20 are placed in the ground, which are connected to the electrical voltage source as an anode.
  • the voltage source 18 switches the removal tool 30 via a line in the drill rod 28 as a cathode. Due to the voltage developing in the soil between the anode and the cathode, a liquid film is generated around the removal tool 3, which reduces friction and adhesion of soil material in the borehole wall 4 with respect to the removal tool 30. In this way, after the hole 3 has been created, the removal tool 30 can be withdrawn from the hole 3 more easily and with less risk of soil material loosening from the borehole wall 4. This considerably reduces the risk of defects within the foundation element 5 due to loosened soil material.
EP19218232.7A 2019-12-19 2019-12-19 Procédé et dispositif de fabrication d'un élément de mise à la terre dans le sol Withdrawn EP3839147A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19218232.7A EP3839147A1 (fr) 2019-12-19 2019-12-19 Procédé et dispositif de fabrication d'un élément de mise à la terre dans le sol

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19218232.7A EP3839147A1 (fr) 2019-12-19 2019-12-19 Procédé et dispositif de fabrication d'un élément de mise à la terre dans le sol

Publications (1)

Publication Number Publication Date
EP3839147A1 true EP3839147A1 (fr) 2021-06-23

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Family Applications (1)

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EP19218232.7A Withdrawn EP3839147A1 (fr) 2019-12-19 2019-12-19 Procédé et dispositif de fabrication d'un élément de mise à la terre dans le sol

Country Status (1)

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EP (1) EP3839147A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115584960A (zh) * 2022-10-13 2023-01-10 徐州徐工基础工程机械有限公司 旋挖钻机定点自动作业的控制方法及系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE806844C (de) * 1950-05-21 1951-06-18 Josef Horvath Dr Ing Verfahren zum Lockern festsitzender Bohrlochverrohrungen
US4119511A (en) 1977-01-24 1978-10-10 Christenson Lowell B Apparatus and method of assisting pile driving by electro-osmosis
US4157287A (en) 1978-08-25 1979-06-05 Christenson Lowell B Method of assisting pile driving by electro-osmosis
WO2010139380A1 (fr) * 2009-06-02 2010-12-09 Herrenknecht Ag Procédé et dispositif permettant de réaliser la fondation subaquatique d'un ouvrage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE806844C (de) * 1950-05-21 1951-06-18 Josef Horvath Dr Ing Verfahren zum Lockern festsitzender Bohrlochverrohrungen
US4119511A (en) 1977-01-24 1978-10-10 Christenson Lowell B Apparatus and method of assisting pile driving by electro-osmosis
US4157287A (en) 1978-08-25 1979-06-05 Christenson Lowell B Method of assisting pile driving by electro-osmosis
WO2010139380A1 (fr) * 2009-06-02 2010-12-09 Herrenknecht Ag Procédé et dispositif permettant de réaliser la fondation subaquatique d'un ouvrage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115584960A (zh) * 2022-10-13 2023-01-10 徐州徐工基础工程机械有限公司 旋挖钻机定点自动作业的控制方法及系统
CN115584960B (zh) * 2022-10-13 2024-01-30 徐州徐工基础工程机械有限公司 旋挖钻机定点自动作业的控制方法及系统

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