EP1666670A1 - Bohreinrichtung - Google Patents

Bohreinrichtung Download PDF

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Publication number
EP1666670A1
EP1666670A1 EP05077778A EP05077778A EP1666670A1 EP 1666670 A1 EP1666670 A1 EP 1666670A1 EP 05077778 A EP05077778 A EP 05077778A EP 05077778 A EP05077778 A EP 05077778A EP 1666670 A1 EP1666670 A1 EP 1666670A1
Authority
EP
European Patent Office
Prior art keywords
drilling device
drilling
shaft
bore
crown
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.)
Granted
Application number
EP05077778A
Other languages
English (en)
French (fr)
Other versions
EP1666670B1 (de
Inventor
Luc Maria Hugo Corneel Smet
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.)
Individual
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Individual
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Publication date
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Priority to DE200520021197 priority Critical patent/DE202005021197U1/de
Publication of EP1666670A1 publication Critical patent/EP1666670A1/de
Application granted granted Critical
Publication of EP1666670B1 publication Critical patent/EP1666670B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • E02D3/126—Consolidating by placing solidifying or pore-filling substances in the soil and mixing by rotating blades

Definitions

  • the present invention relates to a drilling device for in situ mixing of soil with a binder to form in each case a pile in the ground, comprising a drivable shaft with a bottom end, means mounted at the bottom end of the shaft for loosening the soil and injection means for injecting the binder into the loosened soil.
  • Such drilling devices are generally known and are typically used in ground improvement and the construction of earth-retaining walls, such as a sheet piling for a pit excavation.
  • An example of such a drilling device is described in, among others, US 5,368,415.
  • the known devices generally have the drawback that they display problems when adjacent, possibly already partly hardened piles must be partly overcut in order to form a closed wall.
  • many helical mixing blades are usually required to achieve a good mixing of the soil with the binder, particularly when working in clay soils.
  • the invention has for its object to provide a drilling device of the type stated in the preamble, with a simple structure, with which piles can be formed by in situ mixing, and adjacent piles can be overcut without problem.
  • the drilling device is distinguished in that a bore-crown is mounted on the shaft, which is provided on at least a part of its periphery with cutting means for overcutting a pile adjacent to the pile for forming.
  • a bore-crown adjacent piles can be overcut, while a pile is simultaneously formed by in situ mixing.
  • the cutting means comprise a number of cutting teeth distributed regularly along the periphery of the bore-crown such that sufficiently neat outer contours are obtained for the pile.
  • the bore-crown is preferably mounted on the shaft by means of a bracket.
  • This bracket provides for a strengthening of the drilling device and ensures a further mixing of the material situated above the bore-crown as seen in axial direction.
  • the means for loosening the soil preferably comprise an array of first teeth which are arranged at a distance from the shaft and which are located substantially under the bore-crown. These teeth have substantially the function of a rake with which the soil is loosened. These teeth must be oriented such that optimum loosening of the soil is obtained, and will for instance be oriented substantially perpendicularly of the at least one arm.
  • the first teeth are arranged on at least one arm which extends substantially between the shaft and the bore-crown and which is preferably oriented obliquely downward from the bore-crown. In this manner the teeth can readily be placed at different distances from the shaft.
  • the means for loosening the soil can also comprise a number of second teeth, which are arranged around the shaft close to the bottom end thereof. These second teeth serve for the first central cutting into the soil for loosening.
  • spray nozzles for enhancing loosening and mixing of the soil.
  • first spray nozzles which are oriented substantially upward from the plane of the bore-crown.
  • These spray nozzles can for instance be arranged along the periphery of the bore-crown.
  • Second spray nozzles can further be provided in the vicinity of the means for loosening the soil.
  • a first number thereof can thus be arranged for instance close to the first teeth and a second number thereof close to the second teeth.
  • These second spray nozzles likewise contribute toward a good mixing of the soil with the binder.
  • mixing means for mixing the loosened soil can be provided above the bore-crown as seen in axial direction.
  • These mixing means can for instance comprise mixing arms or helical mixing blades.
  • Drive means are preferably provided for driving the shaft at a speed of 50 to 180 revolutions per minute. This is a speed which is higher than the usual speed for normal drilling installations and which ensures that a good mixing is achieved.
  • the invention further relates to a multi-shaft drilling installation comprising at least two drilling devices according to the invention, wherein the two drilling devices are mounted such that partially overlapping piles can be formed.
  • the shafts of the at least two drilling devices are accommodated in a fixed support structure.
  • This support structure provides for additional stabilization of the drilling devices, particularly when drilling takes place in difficult soils.
  • the bore-crown of a first drilling device as seen in the plane of the shafts, is mounted higher than the bore-crown of a second adjacent drilling device, wherein the bore-crowns partly overlap each other as seen in a perpendicular projection onto a plane lying perpendicularly of the shafts.
  • this bracket preferably has axial dimensions which are considerably greater than those of the bracket of an adjacent second drilling device. In this manner overlapping piles can be formed without the brackets of two adjacent drilling devices impeding each other.
  • the second drilling device with the bracket with smaller axial dimensions is provided above the bracket with mixing arms mounted on its shaft. These mixing arms compensate the loss of mixing capacity resulting from the smaller bracket.
  • the first drilling device is further preferably axially displaceable relative to the second drilling device, wherein this axial displacement can be controlled as a function of the diameter of the piles for forming.
  • Figure 1 shows a drilling device for in situ mixing of soil with a binder for the purpose of forming a pile in the ground.
  • a rotatingly drivable shaft 1 with a bottom end 2.
  • Mean for loosening the soil which here consist of:
  • a bore-crown 4 which is provided on its periphery with cutting teeth 6 for overcutting a pile adjacent to the pile for forming.
  • the cutting teeth can for instance take the form of a number of cutting blocks oriented substantially axially downward, but can also be for instance obliquely oriented teeth.
  • This overcutting will be better understood with reference to figures 8a and 8b, which show how a series of mutually adjacent piles can be obtained using a drilling device according to the invention.
  • the bore-crown is mounted on shaft 1 by means of a bracket 7. This bracket brings about strengthening of the whole and during drilling also contributes toward a further mixing of the binder with the soil above bore-crown 4.
  • bracket has a longer form in axial direction than is usual in order to enhance this mixing.
  • This bracket can however also be given a shorter form, in which case it is recommended to provide additional mixing means.
  • mixing arms 10a-c are provided as seen in axial direction above bracket 7', which arms partly fulfill the function of the larger bracket 7 of first drilling device A.
  • the binder is injected through hollow shaft 1 into the loosened soil (at 16 in figure 3) at the bottom of this hollow shaft.
  • This is a known principle for drilling devices for in situ mixing, and will therefore not be described here in detail.
  • binder can be injected at different positions in the vicinity of the drilling device. In the variants shown in figures 1-4 this takes place using a number of spray nozzles:
  • FIGS 5 and 6 illustrate embodiments of a two-shaft drilling device according to the invention.
  • This comprises a first drilling device A, which has already been explained with reference to figures 2-4, and a second drilling device B.
  • the second drilling device B differs from the first drilling device A in that its bracket 7', as seen in axial direction, is shorter than bracket 7 of the first drilling device. In this manner brackets 7 and 7' do not touch each other during the rotation of shafts 1, 1'.
  • These two drilling devices are mounted such that two partially overlapping piles can be formed.
  • FIGS. 8a and 8b show how a series of adjacent piles can be arranged to form for instance a sheet piling for a pit excavation.
  • the figure shows the step in which two piles 20a and 20b are formed simultaneously by the two-shaft drilling installation.
  • a pile 20c which has been formed together with pile 20d during a previous step, is herein partly overcut in grey coloured area 21 of pile 20c. This overcutting takes place without problem owing to the presence of bore-crown 4' of the second drilling device B.
  • the drivable shafts 1, 1' of drilling devices A, B of figures 5 and 6 are accommodated in a fixed support structure 15 which imparts extra stability to the whole.
  • bore-crown 4 of the first drilling device A is in a higher position than bore-crown 4' of the second adjacent drilling device B and, as seen in a perpendicular projection onto a plane perpendicularly of the shafts, bore-crowns 4, 4' overlap each other partly to form two partially overlapping piles 20a, 20b.
  • Additional mixing blades 10a-c are further provided in the second drilling device B, above bracket 7', so as to further enhance the mixing.
  • Figure 7 finally shows a three-shaft drilling installation comprising three drilling devices A, B, C.
  • the skilled person will understand that, depending on the desired applications and the available drive means, one-, two-, three- or multi-shaft installations can be provided, and that the invention is not limited to the above exemplary embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structural Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Soil Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Paleontology (AREA)
  • Agronomy & Crop Science (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Earth Drilling (AREA)
EP05077778.8A 2004-12-06 2005-12-06 Bohreinrichtung Active EP1666670B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE200520021197 DE202005021197U1 (de) 2004-12-06 2005-12-06 Bohrvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE2004/0594A BE1015485B5 (nl) 2004-12-06 2004-12-06 Boorinrichting.

Publications (2)

Publication Number Publication Date
EP1666670A1 true EP1666670A1 (de) 2006-06-07
EP1666670B1 EP1666670B1 (de) 2016-02-24

Family

ID=34383043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05077778.8A Active EP1666670B1 (de) 2004-12-06 2005-12-06 Bohreinrichtung

Country Status (2)

Country Link
EP (1) EP1666670B1 (de)
BE (1) BE1015485B5 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008138390A1 (en) * 2007-05-10 2008-11-20 Luc Maria Hugo Corneel Smet Improved drilling device
BE1018657A5 (nl) * 2009-02-13 2011-06-07 Smet Luc Maria Hugo Corneel Boorinstallatie.
CN104846815A (zh) * 2015-06-05 2015-08-19 赵子健 一种t型圆头桩制作装置的实施方法
CN105672296A (zh) * 2016-03-04 2016-06-15 韩希鹏 正六边形桩与矩形桩插扣装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104846817B (zh) * 2015-06-05 2016-08-24 辽宁工程技术大学 一种六棱柱复合水泥土桩机的实施方法
CN104846818B (zh) * 2015-06-05 2016-08-17 辽宁工程技术大学 T型圆头桩制作装置
DE102017104879A1 (de) 2017-03-08 2018-09-13 Hans Böck Gmbh & Co. Verfahren, Vorrichtung und Verwendung der Vorrichtung zum Verankern eines vertikalen Bauteils in einem Bohrloch
CN106906830A (zh) * 2017-04-06 2017-06-30 郑丹 一种椭圆基坑支护方案

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4063424A (en) * 1975-09-10 1977-12-20 Takenaka Komuten Co., Ltd. Device for constructing a foundation in soft soil formations
JPS57140417A (en) * 1981-02-20 1982-08-31 Nitto Techno Group:Kk Injection pipe for ground improving powder
JPS5988532A (ja) * 1982-11-13 1984-05-22 Tomoyoshi Shinohara 地中構造物の構築工法及びその工法に用いる切削軸
US4902172A (en) * 1988-05-26 1990-02-20 Tenox Corporation Multi-rods type apparatus for ground improvement
NL9100227A (nl) * 1991-02-08 1992-09-01 Alexander Julien Verstraeten Werkwijze en inrichting voor het in de grond vormen van ten minste een holle paal.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5368415A (en) 1993-02-18 1994-11-29 S. M. W. Seiko Spiral flights for improved soil mixing and efficient boring for use on multi-shaft auger soil mixing apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4063424A (en) * 1975-09-10 1977-12-20 Takenaka Komuten Co., Ltd. Device for constructing a foundation in soft soil formations
JPS57140417A (en) * 1981-02-20 1982-08-31 Nitto Techno Group:Kk Injection pipe for ground improving powder
JPS5988532A (ja) * 1982-11-13 1984-05-22 Tomoyoshi Shinohara 地中構造物の構築工法及びその工法に用いる切削軸
US4902172A (en) * 1988-05-26 1990-02-20 Tenox Corporation Multi-rods type apparatus for ground improvement
NL9100227A (nl) * 1991-02-08 1992-09-01 Alexander Julien Verstraeten Werkwijze en inrichting voor het in de grond vormen van ten minste een holle paal.

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 242 (M - 175) 30 November 1982 (1982-11-30) *
PATENT ABSTRACTS OF JAPAN vol. 008, no. 201 (M - 325) 14 September 1984 (1984-09-14) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008138390A1 (en) * 2007-05-10 2008-11-20 Luc Maria Hugo Corneel Smet Improved drilling device
BE1018657A5 (nl) * 2009-02-13 2011-06-07 Smet Luc Maria Hugo Corneel Boorinstallatie.
CN104846815A (zh) * 2015-06-05 2015-08-19 赵子健 一种t型圆头桩制作装置的实施方法
CN105672296A (zh) * 2016-03-04 2016-06-15 韩希鹏 正六边形桩与矩形桩插扣装置

Also Published As

Publication number Publication date
BE1015485A0 (nl) 2005-04-05
EP1666670B1 (de) 2016-02-24
BE1015485B5 (nl) 2006-02-07

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