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EP3771774B1 - Tête de forage, cage d'armature et unité de forage destinée à la fabrication de pieux - Google Patents

Tête de forage, cage d'armature et unité de forage destinée à la fabrication de pieux Download PDF

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Publication number
EP3771774B1
EP3771774B1 EP20187455.9A EP20187455A EP3771774B1 EP 3771774 B1 EP3771774 B1 EP 3771774B1 EP 20187455 A EP20187455 A EP 20187455A EP 3771774 B1 EP3771774 B1 EP 3771774B1
Authority
EP
European Patent Office
Prior art keywords
anchor
drill head
drill
reinforcing cage
base plate
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.)
Active
Application number
EP20187455.9A
Other languages
German (de)
English (en)
Other versions
EP3771774C0 (fr
EP3771774A1 (fr
Inventor
Daniel Leuenberger
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.)
Marti Gruendungstechnik AG
Original Assignee
Marti Gruendungstechnik AG
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 Marti Gruendungstechnik AG filed Critical Marti Gruendungstechnik AG
Publication of EP3771774A1 publication Critical patent/EP3771774A1/fr
Application granted granted Critical
Publication of EP3771774B1 publication Critical patent/EP3771774B1/fr
Publication of EP3771774C0 publication Critical patent/EP3771774C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/0604—Prismatic or cylindrical reinforcement cages composed of longitudinal bars and open or closed stirrup rods
    • E04C5/0618—Closed cages with spiral- or coil-shaped stirrup rod
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
    • E02D9/005—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof removing the top of placed piles of sheet piles

Definitions

  • the present invention relates in a first aspect to a drill head for a drilling unit for producing piles, in particular in-situ concrete piles, in insufficiently stable subsoil.
  • the present invention specifically relates to a drill head which comprises an anchor, by means of which it is ensured that a reinforcement cage required for the production of the pile in insufficiently stable subsoil is held in a position that is advantageous for the load-bearing capacity.
  • the present invention also relates to a corresponding reinforcement cage, which can interact with the anchor of a drill head according to the invention.
  • the present invention also relates to a reinforcement cage, which enables simple excavation of the subsoil.
  • the present invention relates in a fourth aspect to a drilling unit comprising a drill head according to the invention and a reinforcement cage according to the invention.
  • piles for example, are used to found the structure. These transfer the building loads to deeper, load-bearing soil layers.
  • a steel pipe hereinafter referred to as drill pipe
  • drill pipe is advantageously sealed watertight at the lower end with a special tip, the drill head.
  • the drill head and drill pipe are connected to each other so that they cannot rotate.
  • this drill pipe is screwed into the ground under high vertical pressure to the required depth; the soil material is displaced by the volume of the drill pipe.
  • a prefabricated Pile reinforcement a so-called reinforcement cage, is inserted into the drill pipe and the pipe is filled with concrete.
  • the drill pipe is then withdrawn.
  • the drill head detaches from the drill pipe and remains in the subsoil.
  • a drill head which can be connected to the end of a rotary shaft in a rotationally fixed manner by means of locking means, which locking means are designed as radial projections on a connecting tube of the drill head.
  • a pile shoe which can be connected to longitudinal reinforcement. Circumferential recesses or a flange are formed on the pile shoe, which are undercut by curved bar ends of the longitudinal reinforcement.
  • the present invention is therefore based on the object of overcoming the aforementioned disadvantages and of proposing a drill head and a reinforcement cage by means of which high-quality piles, in particular in-situ concrete piles, can be produced in a less stable subsoil.
  • a further object of the present invention is to propose a reinforcement cage, specifically a reinforcement cage top end, which considerably simplifies the excavation work.
  • a drill head comprising a base plate and a drill bit attached to the base plate, the drill bit being arranged essentially perpendicular to the base plate, a borehole being able to be drilled in a subsoil by means of the drill bit, the drill head being at a comprises an anchor attached to the base plate, wherein the anchor is arranged substantially perpendicular to the base plate and in the opposite direction to the drill tip, the anchor comprising an anchor body connected to the base plate and an anchor tip, which together form an arrow-shaped anchor, wherein at a transition between the Anchor tip and the anchor body locking means for locking an anchor ring or an anchor ball, which is arranged coaxially to and at one end of a reinforcement cage, are formed.
  • a drill head according to the invention ensures that, thanks to the locking means of the anchor, a reinforcement cage is held within the hole drilled with the drill head and therefore that a high-quality pile, in particular an in-situ concrete pile, can be produced. Specifically, a drill head according to the invention prevents the basket from moving away from the drill head.
  • the locking means take the form of locking edges. Thanks to the locking edges, which form a kind of hook, an anchor ring, an anchor ball or any other suitable means of a reinforcement cage can be locked. This can prevent the basket from moving away from the drill head.
  • the locking means include a locking opening. Thanks to the hook-shaped anchor with the locking opening, an anchor ring, an anchor ball or any other suitable means of a reinforcement cage can be locked. This can prevent the basket from moving away from the drill head.
  • the drill head is configured such that a substantially cylindrical drill pipe can be attached to the base plate coaxially to the drill tip and around the anchor. This allows liquid concrete to be poured into the drill pipe, which significantly simplifies the production of a high-quality in-situ concrete pile.
  • the drill tip comprises a first drill head plate and a second drill head plate, which are arranged perpendicular to one another and to the base plate. This allows a borehole to be drilled quickly and easily using a drill head according to the invention.
  • the first drill plate and the second drill plate are interchangeable. This means that the shape, size and material of the drill plates can be selected according to the specific ground conditions, for example.
  • the anchor is replaceable. This means that the shape and size of the anchor can be selected, for example, according to the specific reinforcement cage.
  • a reinforcement cage comprising a cylindrical reinforcement cage fitting, wherein the reinforcement cage comprises an anchor ring or an anchor ball for locking the reinforcement cage on the drill head, the anchor ring or the anchor ball being coaxial to and from one end of the cylindrical reinforcement cage fitting is arranged, and wherein the anchor ring or the anchor ball is designed such that it is deformable.
  • the reinforcement cage can interact with the anchor of a drill head according to the invention. Thanks to the anchor ring and/or the anchor ball, the reinforcement cage is held in the borehole, which enables the production of a high-quality pile, in particular an in-situ concrete pile.
  • the diameter of the anchor ring or the anchor ball can be increased. This means that the anchor ring or the anchor ball can be attached to the anchor tip of a drill head and the reinforcement cage can be held with it.
  • the test basket comprises a split ring which is arranged coaxially to the cylindrical reinforcement cage fitting and at the opposite end of the cylindrical reinforcement cage fitting with respect to the anchor ring or the anchor ball, the split ring being loosely attached to the Reinforcement cage is attached in such a way that the split ring can move in the radial and / or axial direction with respect to the longitudinal axis of the cylindrical reinforcement cage fitting.
  • a predetermined breaking point is formed in the pile. During excavation, the pile overconcrete automatically breaks at this predetermined breaking point. This means that the unreinforced part of the pile no longer has to be separated manually and costly from the rest of the pile.
  • a drilling unit comprising a drill head according to the invention and a reinforcement cage according to the invention.
  • a drilling unit according to the invention With a drilling unit according to the invention, high-quality piles, especially in-situ concrete piles, can be easily produced.
  • the drilling unit ensures, on the one hand, that the drill head and the reinforcement cage interact in such a way that the reinforcement cage cannot move away from the drill head and is therefore held in the drill hole, but also that a predetermined breaking point is formed in the pile, which considerably simplifies the completion of the pile. Thanks to the predetermined breaking point, the unreinforced part of the pile no longer needs to be separated from the rest of the pile in a specially designed work step. this part Thanks to the predetermined breaking point, the pile automatically separates from the rest of the pile during excavation.
  • the Figures 1a to 1c show a drill head 1 according to a first preferred embodiment of the present invention.
  • This drill head 1 comprises a base plate 2, which is circular, and a drill bit 3, which is intended for displacing the soil during drilling.
  • the drill tip essentially consists of two drill head plates 3a and 3b arranged perpendicular to one another.
  • This first drill head plate 3a and second drill head plate 3b are configured in such a way that they can be connected to one another and to the base plate 2 in a rotationally secure manner.
  • the drill head plates 3a and 3b are attached to the base plate 2 in an interchangeable manner.
  • the shape, size and number of drill head plates 3a and 3b can therefore be specifically selected based on the subsoil, depth, etc.
  • the drill tip 3 also has a spiral plate 3c, which is arranged spirally around the axis of symmetry A of the drill head 1.
  • the drill head plates are 3a and 3b designed so that the anchor supports 3a 'and 3b' of the plates 3a and 3b protrude above the base plate 2.
  • the drill head 1 further comprises an anchor 4, which can advantageously be secured against rotation to the base plate 2 by means of the anchor supports 3a 'and 3b' and can be separated from it again.
  • an anchor 4 which can advantageously be secured against rotation to the base plate 2 by means of the anchor supports 3a 'and 3b' and can be separated from it again.
  • the anchor 4 and the base plate 2 are welded together.
  • the anchor 4 has an anchor tip 4a and an anchor body 4b.
  • the anchor tip 4a essentially has the shape of a truncated triangle, the base of this triangle being wider than the anchor body 4b.
  • the anchor tip 4a and the anchor body 4b form a kind of arrow together.
  • the anchor locking edges 4c are formed between the anchor tip 4a and the anchor body 4b.
  • the anchor tip 4a has a width that is smaller than the diameter of the base plate 2. This allows a drill pipe 10 (see Figure 2 ) can be attached to the base plate 2 and around the anchor 4.
  • the drill pipe 10 can advantageously be removably attached to the base plate 2 by means of a locking ring 2 '.
  • a drill head 1 for example an in-situ concrete pile
  • a first step a hole is drilled into the ground 5 using drill head 1 including drill pipe 10 (see also Figures 2 and 3 ).
  • a reinforcement cage 20 is guided through the drill pipe 10 until it comes into contact with the anchor tip 4a of the drill head 1.
  • the reinforcement cage 20 provides the pile reinforcement and is indispensable in many cases, especially when the soil 5 is not very stable.
  • the reinforcement cage 20 has via an anchor ring 21, which is configured in such a way that it can spread over the triangle of the anchor tip 4a in the third step III.
  • the anchor ring 21 can, for example, consist at least partially of an elastic material or be designed in such a way that it has a certain elasticity. After the anchor ring 21 has passed the base of the anchor tip 4a, it can return to its original shape. The diameter of the anchor ring 21 is selected such that the reinforcement cage 20 is locked by means of the anchor locking edge 4c and can no longer come out of the borehole due to the nature of the soil 5.
  • the drill pipe 10 is filled with liquid concrete. Afterwards and preferably before the start of the concrete setting process, the drill pipe 10 is separated from the drill head 1 in step V and pulled out of the borehole.
  • FIG 7 shows a second preferred embodiment of a drill head 50 according to the invention.
  • the drill head 50 differs from the drill head 1 (see Figures 1a to 1c ) only in the form of the anchor 54.
  • the anchor 54 has an anchor tip 54a and an anchor body 54b.
  • the anchor tip 54a in this embodiment, has essentially the shape of a halved triangle, with the base of this triangle being wider than the anchor body 54b.
  • the anchor 54 has a locking opening 54c between the anchor tip 54a and the anchor body 54b.
  • the anchor tip 54a and the anchor body 54b thus form a kind of hook together. It is important to note that in this embodiment the tip of the halved triangle of the anchor tip 54a is not in the middle but is offset from the center of the base plate 2.
  • Figure 7 also shows the lower end of a reinforcement cage 60 according to a second embodiment of the present invention.
  • the reinforcement cage 60 has an anchor ball 61 instead of an anchor ring 21.
  • the anchor ball 61 advantageously made of a steel strand, is attached to two longitudinal bars of the reinforcement cage 60 that are slightly curved at the bottom. Since the uppermost point of the anchor tip 51a of the anchor 54 lies eccentrically above the base plate 2 and in the tube, when the anchor ball 61 is lowered, the latter is forced to slide down on the inclined edge of the anchor tip 54a and to deform in the process. Once the anchor ball 61 has reached the lowest point of the anchor tip 54a, it will open against the locking opening 54c.
  • the anchor ball 61 By pulling up the reinforcement cage 60 with the anchor ball 61 secured in tension, it anchors itself in the anchor 54. Since the anchor ball 61 consists of two rope loops 61a, 61b lying at right angles to one another, a rope always finds the locking opening 54c.
  • the ground 5 around the pile 40 is excavated.
  • a part of the in-situ concrete pile 40 protrudes from the ground 5.
  • the protruding part of the in-situ concrete pile 40 consists of a part 41a reinforced with the reinforcement cage 30 and an unreinforced part 41b.
  • the unreinforced part 41b must be separated from the rest of the in-situ concrete pile 40. In order not to damage the in-situ concrete pile, this last step is carried out manually in the prior art and is therefore very complex and expensive.
  • the present invention also relates in a third aspect to a reinforcement cage 30, which enables simple excavation, especially which simplifies separation of the pile parts 41a and 41b.
  • the reinforcement cage 30 according to the second aspect of the present invention has a split ring 32 which is attached to the fitting 33 of the reinforcement cage 30.
  • the split ring 32 is not rigidly attached to the reinforcement cage 30. Rather, and preferably, it is only held by the reinforcement cage 30.
  • the split ring 32 can move relative to the reinforcement cage 30 within a certain range in the directions C and D (see Figure 6 ) move.
  • the split ring can be attached to the reinforcement cage 30, for example using threaded pins 34 and nuts 35.
  • the split ring 32 can move more or less in the direction D. Additionally, the holes of the split ring 32 may have a shape that allows movement of the split ring in direction C.
  • the holes in the split ring 32 are advantageously designed as elongated holes.
  • the split ring 32 represents a predetermined breaking point S of the pile (see Figures 5a and 5b ). Thanks to the predetermined breaking point S, the pile 40 breaks "automatically" during excavation work and the unreinforced part 41b of the pile 40 no longer has to be separated from the pile manually and at great expense.
  • the reinforcement cage 30 can be provided with or without an anchor ring 21. Even if in the Figures 5a up to 5c and 6 the reinforcement cage 30, analogous to the reinforcement cage 20, has an anchor 31, it is of course conceivable to provide a reinforcement cage 30 that does not have an anchor ring 21.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Architecture (AREA)
  • Piles And Underground Anchors (AREA)

Claims (11)

  1. Tête de forage (1, 50) comprenant une plaque de base (2) et une mèche de forage (3) fixée à la plaque de base (2), la mèche de forage (3) étant agencée de manière substantiellement perpendiculaire à la plaque de base (2), et un trou de forage pouvant être percé dans un terrain à bâtir au moyen de la mèche de forage (3),
    caractérisé en ce que
    la tête de forage (1, 50) comprend une ancre (4, 54) fixée à la plaque de base (2), l'ancre (4, 54) étant agencée de manière substantiellement perpendiculaire à la plaque de base (2) et dans une direction opposée à la mèche de forage (3), l'ancre (4, 54) comprenant un corps d'ancre (4b, 54b) relié à la plaque de base (2) et une pointe d'ancre (4a, 54a) qui forment ensemble une ancre en forme de flèche (4, 54), des moyens de verrouillage (4c, 54c) étant formés au niveau d'une transition entre la pointe d'ancre (4a, 54a) et le corps d'ancre (4b, 54b) pour verrouiller un anneau d'ancre ou une boule d'ancre agencés à une extrémité de cage de renforcement selon l'une des revendications suivantes 8 à 10, et de manière coaxiale à cette dernière.
  2. Tête de forage (1) selon la revendication 1, dans laquelle les moyens de verrouillage prennent la forme de bords de verrouillage (4c).
  3. Tête de forage (1) selon la revendication 1, dans laquelle les moyens de verrouillage comprennent un trou de verrouillage (54c).
  4. Tête de forage (1) selon l'une des revendications précédentes, dans laquelle la tête de forage (1) est configurée manière à ce qu'un tube de forage (10) substantiellement cylindrique puisse être fixé à la plaque de base (2) de manière coaxiale avec la mèche de forage (3) et autour l'ancre (4).
  5. Tête de forage (1) selon l'une des revendications précédentes, dans laquelle la mèche de forage (3) comprend une première plaque de tête de forage (3a) et une deuxième plaque de tête de forage (3b) agencées de manière perpendiculaire l'une par rapport à l'autre et à la plaque de base (2).
  6. Tête de forage (1) selon la revendication 5, dans laquelle première plaque de forage (3a) et la deuxième plaque de forage (3b) sont interchangeables.
  7. Tête de forage (1) selon l'une des revendications précédentes, dans laquelle l'ancre (4, 54) est interchangeable.
  8. Cage de renforcement (20, 60) comprenant une armature cylindrique (33) et un anneau d'ancre (21) ou une boule d'ancre (61) pour verrouiller une tête de forage (1) selon l'une des revendications 1 à 7,
    caractérisé en ce que
    l'anneau d'ancre (21) ou la boule d'ancre (61) est agencé de manière coaxiale avec la cage de renforcement cylindrique (33) à une extrémité de celle-ci, et en ce que l'anneau d'ancre (21) ou la boule d'ancre (61) est conçu manière à être déformable, et grâce auquel il est garanti que la cage de renforcement (20, 60) peut coopérer avec l'ancre ou la tête de forage (1).
  9. Cage de renforcement (20, 60) selon la revendication 8, dans laquelle le diamètre de l'anneau d'ancre (21) ou la boule d'ancre (61) peut être augmenté.
  10. Cage de renforcement (20, 60) selon l'une des revendications 8 ou 9, comprenant un anneau fendu (32) agencé de manière coaxiale avec la cage de renforcement cylindrique (33) et à l'extrémité opposée de la cage de renforcement cylindrique (33) par rapport à l'anneau d'ancre (21) ou la boule d'ancre (61), l'anneau fendu (32) étant fixé de manière lâche à la cage de renforcement (30) de telle manière que l'anneau fendu (32) puisse être déplacé dans une direction radiale et/ou axiale par rapport à l'axe longitudinal de la cage de renforcement cylindrique (33).
  11. Unité de forage comprenant une tête de forage (1) selon l'une des revendications 1 à 7 et une cage de renforcement (20, 30) selon l'une des revendications 8 à 10.
EP20187455.9A 2019-07-30 2020-07-23 Tête de forage, cage d'armature et unité de forage destinée à la fabrication de pieux Active EP3771774B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00967/19A CH716469A1 (de) 2019-07-30 2019-07-30 Bohrkopf, Bewehrungskorb und Bohreinheit zur Herstellung von Pfählen.

Publications (3)

Publication Number Publication Date
EP3771774A1 EP3771774A1 (fr) 2021-02-03
EP3771774B1 true EP3771774B1 (fr) 2023-12-06
EP3771774C0 EP3771774C0 (fr) 2023-12-06

Family

ID=69174224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20187455.9A Active EP3771774B1 (fr) 2019-07-30 2020-07-23 Tête de forage, cage d'armature et unité de forage destinée à la fabrication de pieux

Country Status (2)

Country Link
EP (1) EP3771774B1 (fr)
CH (1) CH716469A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4227467A1 (fr) * 2022-02-09 2023-08-16 Marti Gründungstechnik AG Mèche de forage pour un dispositif de forage permettant de créer des trous de forage dans un terrain de fondation
CN114482028B (zh) * 2022-03-18 2023-09-08 中建三局集团有限公司 一种微型灌注桩反循环施工装置及其施工方法
CN114775586A (zh) * 2022-04-20 2022-07-22 深圳市工勘岩土集团有限公司 一种基坑逆作法旋挖扩底、全回转定位施工方法

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Publication number Priority date Publication date Assignee Title
GB114221A (en) * 1917-04-13 1918-03-28 William John Stewart Improvements relating to Reinforced Concrete Piles.
US3354657A (en) * 1965-05-03 1967-11-28 Lee A Turzillo Method for installing anchoring or supporting columns in situ
US3698144A (en) * 1970-12-03 1972-10-17 Patrick Joseph Stratton Post anchor
FR2079136A5 (fr) * 1970-12-15 1971-11-05 Frankignoul Cie Internal
JPS5927026A (ja) * 1982-08-06 1984-02-13 Hasegawa Komuten Co Ltd 場所打ち杭の杭頭処理工法
JPS59228523A (ja) * 1983-06-10 1984-12-21 Tobishima Kensetsu Kk 杭頭処理工法
JPS6378918A (ja) * 1986-09-22 1988-04-09 Yukio Matsumoto 回転軸の先端に角錐ビツトを装着した掘進装置
JPH07197458A (ja) * 1995-01-27 1995-08-01 Matsumuragumi:Kk 基礎杭の施工法
AU723991B2 (en) * 1997-06-19 2000-09-07 Peters, Patricia Evelyn Methods of and apparatus for forming in-ground columns
KR100385769B1 (ko) * 2000-06-13 2003-05-28 주식회사 이금산업 항 매설방법
EP2146046B1 (fr) * 2008-07-15 2014-04-09 Marti Gründungstechnik AG Tête de forage pour un dispositif de forage destiné à la création de trous de forage dans un sol de fondation insuffisamment portant
US20100101163A1 (en) * 2008-10-28 2010-04-29 Juan Marcos Cuevas Modular elements for structural reinforcement
KR20110105118A (ko) * 2010-03-18 2011-09-26 박가영 지주봉 고정구
CN204343285U (zh) * 2014-11-13 2015-05-20 中交隧道工程局有限公司 一种桩基础桩头整体破除结构
CN109778843A (zh) * 2019-01-29 2019-05-21 中建八局轨道交通建设有限公司 灌注桩混凝土灌注顶面控制及桩头拔除施工方法

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Publication number Publication date
EP3771774C0 (fr) 2023-12-06
CH716469A1 (de) 2021-02-15
EP3771774A1 (fr) 2021-02-03

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