EP1719841A1 - Verfahren und apparatus zur Herstellung eines Mikropfahls im Erdboden - Google Patents

Verfahren und apparatus zur Herstellung eines Mikropfahls im Erdboden Download PDF

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Publication number
EP1719841A1
EP1719841A1 EP06007033A EP06007033A EP1719841A1 EP 1719841 A1 EP1719841 A1 EP 1719841A1 EP 06007033 A EP06007033 A EP 06007033A EP 06007033 A EP06007033 A EP 06007033A EP 1719841 A1 EP1719841 A1 EP 1719841A1
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EP
European Patent Office
Prior art keywords
drilling
rod
grout
nozzles
injection
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Withdrawn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
EP06007033A
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English (en)
French (fr)
Inventor
Cesare Melegari
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
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1719841A1 publication Critical patent/EP1719841A1/de
Withdrawn legal-status Critical Current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
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • 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
    • 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
    • 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
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • E02D5/808—Ground anchors anchored by using exclusively a bonding material

Definitions

  • This invention relates to a method and the corresponding equipment for constructing concrete micropiles of the type used for soil consolidation, underpinning and the like.
  • the method according to the invention involves the use of a drilling rod which also acts as reinforcement for the pile, and injection of cement grout directly during drilling, the injection being performed from the surface downwards, unlike known methods, wherein the grouting stage is performed from the bottom of the hole to the surface.
  • the method according to the invention allows micropiles to be made very quickly, with a considerable cost saving on the end product.
  • micropiles One of the most effective techniques for stabilising soil, underpinning or performing the work required to increase the load-bearing capacity of soil is to construct micropiles.
  • This known technique involves inserting into the ground a reinforced concrete pile a few centimetres in diameter and a few metres long, to stabilise the soil and increase its load-bearing capacity.
  • a hole is drilled with a drilling rod fitted with a bit at the tip; when the design depth is reached the rod is removed, steel reinforcement is inserted in the hole, and the hole is filled with a concrete mix of suitable particle size.
  • the present invention which falls into this sector, relates to a method and the corresponding equipment for constructing micropiles with the technology known as jet-grouting, which involves drilling the soil with a rod fitted, at its tip, with a plurality of nozzles through which a fluid is injected at very high pressure (several hundred bars).
  • Said rods consist of bars with a continuous thread, fitted at the tip with a disposable bit equipped with a set of nozzles through which grout is injected during excavations.
  • Grout injection therefore takes place simultaneously with drilling, so that when the rod reaches the required depth, the micropile has already been formed and the work can be considered finished.
  • This technique also allows the construction of micropiles with a wide base that increases their load-bearing capacity.
  • number 1 indicates a rotating high-pressure injection head to which the drilling rod according to the invention, indicated as 2, is connected.
  • Head 1 is connected to devices of known type which cause it to rotate around its own axis until it causes rod 2 to rotate.
  • Rod 2 consists of a set of (self-drilling) steel bars 3, which are of known type in themselves, and which are connected end-to-end via sleeve couplings 4, with the insertion of high-pressure gaskets 5.
  • Rod 2 is fitted at its tip with a disposable bit 6, which presents one or more nozzles 7 leading to an axial pipe 8; said pipe 8 communicates with the interior of the drilling rod which, in turn, communicates with a pipe 9 located in the injection head.
  • a line 11 designed to feed a grout mixture originating from equipment 12 of known type leads to inlet 10 of pipe 9.
  • the equipment supported by a structure 13, which is only illustrated schematically because it is of known type, is set up at the point to be drilled; the first bar, fitted with a bit at its tip, is mounted on head 11, and drilling begins.
  • Head 1 connected to a rotary table or other known apparatus which causes it to rotate around its own axis, causes the rotation of bar 3 with bit 6, which begins to drill the ground (figure 2).
  • the rotation of the rod and simultaneous grout injection can be continued for some time, so as to create at the base of the pipe a bulb of larger dimensions which improves interaction with the soil.
  • this technique offers all the advantages of the jet-grouting technology for the production of micropiles, with a high-output process which allows fast, clean operation.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • Piles And Underground Anchors (AREA)
EP06007033A 2005-04-08 2006-04-03 Verfahren und apparatus zur Herstellung eines Mikropfahls im Erdboden Withdrawn EP1719841A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000020A ITPC20050020A1 (it) 2005-04-08 2005-04-08 Metodo e attrezzatura per la realizzazione di micropali nel terreno

Publications (1)

Publication Number Publication Date
EP1719841A1 true EP1719841A1 (de) 2006-11-08

Family

ID=36940757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06007033A Withdrawn EP1719841A1 (de) 2005-04-08 2006-04-03 Verfahren und apparatus zur Herstellung eines Mikropfahls im Erdboden

Country Status (2)

Country Link
EP (1) EP1719841A1 (de)
IT (1) ITPC20050020A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1959057A2 (de) 2007-02-14 2008-08-20 MELEGARI, Cesare Vorrichtung und Verfahren zur Konstruktion von Mikropfählen im Erdboden, insbesondere zur Verankerung aktiver Anker
ITPR20080080A1 (it) * 2008-12-03 2010-06-04 Cesare Melegari Procedimento per il consolidamento e/o il rinforzo di banchine portuali
CN103953051A (zh) * 2014-05-14 2014-07-30 江苏南通三建集团有限公司 一种灌注桩后加固结构
CN104895062A (zh) * 2015-04-15 2015-09-09 张璐 一种矩形搅拌钻机的实施方法
JP2015203266A (ja) * 2014-04-16 2015-11-16 株式会社フジタ マイクロパイル工法におけるケーシングセグメントの継ぎ足し方法および連結構造
JP2016006264A (ja) * 2014-06-20 2016-01-14 東日本旅客鉄道株式会社 地盤改良杭
EP3037586A1 (de) * 2014-12-23 2016-06-29 Edilsystem S.r.l. Prozess für die verdichtung von böden und/oder baustrukturen im kontakt mit ihnen, und verwandtem gerät
EP3240931B1 (de) * 2014-12-30 2020-02-19 High Five Solutions B.v. Verfahren zum herstellen einer ankerung im boden
CN111827294A (zh) * 2020-07-22 2020-10-27 杭州华电能源工程有限公司 一种适用于不同深度灌注桩混凝土浇筑的导管及使用方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5256004A (en) * 1990-07-31 1993-10-26 Fondazioni Speciali, S.R.L. Method of forming consolidated earth columns by injection and the relevant plant and column
US20010048854A1 (en) * 2000-01-12 2001-12-06 Carter Ernest E. Apparatus and method for jet grouting
US20020108752A1 (en) * 2001-02-12 2002-08-15 Compagnie Du Sol Head for injecting liquid under pressure to excavate the ground

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5256004A (en) * 1990-07-31 1993-10-26 Fondazioni Speciali, S.R.L. Method of forming consolidated earth columns by injection and the relevant plant and column
US20010048854A1 (en) * 2000-01-12 2001-12-06 Carter Ernest E. Apparatus and method for jet grouting
US20020108752A1 (en) * 2001-02-12 2002-08-15 Compagnie Du Sol Head for injecting liquid under pressure to excavate the ground

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1959057A2 (de) 2007-02-14 2008-08-20 MELEGARI, Cesare Vorrichtung und Verfahren zur Konstruktion von Mikropfählen im Erdboden, insbesondere zur Verankerung aktiver Anker
US8066452B2 (en) 2007-02-14 2011-11-29 Cesare Melegari Equipment and method for constructing micropiles in soil, in particular for the anchorage of active anchors
EP1959057A3 (de) * 2007-02-14 2012-06-06 MELEGARI, Cesare Vorrichtung und Verfahren zur Konstruktion von Mikropfählen im Erdboden, insbesondere zur Verankerung aktiver Anker
ITPR20080080A1 (it) * 2008-12-03 2010-06-04 Cesare Melegari Procedimento per il consolidamento e/o il rinforzo di banchine portuali
JP2015203266A (ja) * 2014-04-16 2015-11-16 株式会社フジタ マイクロパイル工法におけるケーシングセグメントの継ぎ足し方法および連結構造
CN103953051A (zh) * 2014-05-14 2014-07-30 江苏南通三建集团有限公司 一种灌注桩后加固结构
CN103953051B (zh) * 2014-05-14 2016-08-24 江苏南通三建集团有限公司 一种灌注桩后加固结构
JP2016006264A (ja) * 2014-06-20 2016-01-14 東日本旅客鉄道株式会社 地盤改良杭
EP3037586A1 (de) * 2014-12-23 2016-06-29 Edilsystem S.r.l. Prozess für die verdichtung von böden und/oder baustrukturen im kontakt mit ihnen, und verwandtem gerät
EP3240931B1 (de) * 2014-12-30 2020-02-19 High Five Solutions B.v. Verfahren zum herstellen einer ankerung im boden
CN104895062A (zh) * 2015-04-15 2015-09-09 张璐 一种矩形搅拌钻机的实施方法
CN111827294A (zh) * 2020-07-22 2020-10-27 杭州华电能源工程有限公司 一种适用于不同深度灌注桩混凝土浇筑的导管及使用方法

Also Published As

Publication number Publication date
ITPC20050020A1 (it) 2006-10-09

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