EP0893570A1 - Multiple head drilling unit for loose soil drill - Google Patents

Multiple head drilling unit for loose soil drill Download PDF

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Publication number
EP0893570A1
EP0893570A1 EP98830409A EP98830409A EP0893570A1 EP 0893570 A1 EP0893570 A1 EP 0893570A1 EP 98830409 A EP98830409 A EP 98830409A EP 98830409 A EP98830409 A EP 98830409A EP 0893570 A1 EP0893570 A1 EP 0893570A1
Authority
EP
European Patent Office
Prior art keywords
drilling
heads
multiple head
loose soil
drilling unit
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Withdrawn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
EP98830409A
Other languages
German (de)
English (en)
French (fr)
Inventor
Sandro Siniscalchi
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.)
MAIT SpA
Original Assignee
MAIT SpA
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 MAIT SpA filed Critical MAIT SpA
Publication of EP0893570A1 publication Critical patent/EP0893570A1/en
Withdrawn legal-status Critical Current

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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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/002—Drilling with diversely driven shafts extending into the borehole
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/04—Driving tunnels or galleries through loose materials; Apparatus therefor not otherwise provided for
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/10—Making by using boring or cutting machines
    • E21D9/1066—Making by using boring or cutting machines with fluid jets

Definitions

  • This patent application concerns a multiple head drilling unit for loose soil drills.
  • the process for strengthening the vault of a tunnel of this type involves a tried and tested technique whereby numerous holes of considerable length are executed along a trajectory conforming to the cross-section of the tunnel. These holes are later filled with a cement mixture; once the mixture has hardened, a series of supporting cement ribs buried and anchored firmly to the ground, are formed all around the tunnel.
  • the above drilling rod is provided with a series of holes at the tip; when the rod penetrates the ground, strong jets of water are discharged through these holes in order to "wash" the hole, in other words to help carry the soil loosened by the drilling rod out of the hole.
  • the rod starts its backward run; during this backwards run a mixture of water-cement is injected through the same holes of the drilling rod which, in view of the very high injection pressure (approx. 500 bar), not only fills the hole but also filters by capillarity into the surrounding terrain in order to form a cement pole having a larger cross-section than that of the initial hole.
  • the very high injection pressure approximately 500 bar
  • the next section of the tunnel can be built using the same technique, drilling the ground on the bottom of the tunnel already built.
  • drilling heads are independent, they can not work in synchrony and thus require two operators, each following the operation of each head during a specific working stage.
  • this difference in the operating times is also increased by the fact that drilling generally takes more time than that required for injecting the cement mixture; this means that the two heads complete laying of the respective poles in different times.
  • the purpose of this invention is to realise a multiple head drilling machine which is simpler and more economical than these conventional drilling machines; the same is also more efficient and versatile and above all requires just one operator.
  • the new drilling machine in question in fact features a single rail on which a trolley supporting two or three heads operating respective drilling rods, slides; this alone makes it evident that the machine in question has a simpler structure with respect to conventional drilling machines with two heads and double rail.
  • the heads fitted on the machine according to the invention are positioned close to each other and it is possible to change the centre to centre distance on board the trolley by means of a jack system; this feature is important from a practical point of view in that it permits setting the centre to centre distance of the cement poles which support the vault of the tunnel, as required.
  • all the heads of the machine according to the invention perform the same operating stage at the same time; the lack of operating differences between said heads means that they can easily be controlled by just one operator.
  • figure 1 is a top view of the rail-head supporting trolley mounted on the device according to the invention.
  • the drilling unit in question features a single rail (1) on which a trolley (2) slides; it being provided that said trolley (2) supports two operating heads (3), mounted parallel and close to each other and whose centre to centre distance may be varied by means of a jack (4) mounted orthogonally between the two heads (3).
  • the operating heads (3) operate respective drilling rods (5) generally provided at the tip with a series of holes, some of which are used to discharge the wash water and others to discharge the cement mixture.
  • the cement mixture is introduced into the unit in question through a special pipe (6) having two branches (6a), each of which supplies a specific head (3); a standard rotating joint (7) being provided along each of said branches (6a) and immediately upstream the respective head (3).
  • FIG. 1 also illustrates that the above drilling rods (5) are of different lengths in order to prevent any interference between the cement jets discharged from the same rods (5).

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Earth Drilling (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)
EP98830409A 1997-07-11 1998-07-03 Multiple head drilling unit for loose soil drill Withdrawn EP0893570A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITAN970037U 1997-07-11
IT97AN000037 IT243298Y1 (it) 1997-07-11 1997-07-11 Gruppo perforatore a testa multipla per macchine perforatrici diterreni sciolti

Publications (1)

Publication Number Publication Date
EP0893570A1 true EP0893570A1 (en) 1999-01-27

Family

ID=11334097

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98830409A Withdrawn EP0893570A1 (en) 1997-07-11 1998-07-03 Multiple head drilling unit for loose soil drill

Country Status (2)

Country Link
EP (1) EP0893570A1 (it)
IT (1) IT243298Y1 (it)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1012505C2 (nl) * 1999-07-02 2001-01-03 Heerema Ondergrondse Infrastru Jetgraafinrichting.
WO2001002692A1 (en) * 1999-07-02 2001-01-11 Heerema Holding Construction Inc. Jet excavating device
NL1016917C2 (nl) * 1999-07-02 2002-10-08 Heerema Holding Construction I Jetgraafinrichting.
NL1016952C2 (nl) * 1999-07-02 2002-10-15 Heerema Holding Construction I Jetgraafinrichting.

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE826896C (de) * 1950-05-20 1952-01-07 Fried Krupp Bergwerke Essen Einbruch-Kernbohrmaschine
DE3041666A1 (de) * 1980-11-05 1982-06-09 Adolf 7836 Teningen Fischer Bodenbearbeitungsgeraet sowie verfahren zum auflockern, belueften u.dgl., insbesondere von rasengrund
US4681170A (en) * 1985-08-05 1987-07-21 Furukawa Co., Ltd. Rock drills for drilling continuously arrayed bores
GB2196276A (en) * 1986-07-24 1988-04-27 Mcgregor Rig with plurality of drills
EP0308083A2 (en) * 1987-09-04 1989-03-22 Frank Manchak, Jr. Device for sampling soils and retaining volatiles therein and method of using same
FR2623242A1 (fr) * 1987-11-12 1989-05-19 Contant Paul Carottier pneumatique pour fouilles cylindriques en roches
US5575345A (en) * 1994-11-15 1996-11-19 Chemical Grouting Company. Ltd. Multi shaft drilling unit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE826896C (de) * 1950-05-20 1952-01-07 Fried Krupp Bergwerke Essen Einbruch-Kernbohrmaschine
DE3041666A1 (de) * 1980-11-05 1982-06-09 Adolf 7836 Teningen Fischer Bodenbearbeitungsgeraet sowie verfahren zum auflockern, belueften u.dgl., insbesondere von rasengrund
US4681170A (en) * 1985-08-05 1987-07-21 Furukawa Co., Ltd. Rock drills for drilling continuously arrayed bores
GB2196276A (en) * 1986-07-24 1988-04-27 Mcgregor Rig with plurality of drills
EP0308083A2 (en) * 1987-09-04 1989-03-22 Frank Manchak, Jr. Device for sampling soils and retaining volatiles therein and method of using same
FR2623242A1 (fr) * 1987-11-12 1989-05-19 Contant Paul Carottier pneumatique pour fouilles cylindriques en roches
US5575345A (en) * 1994-11-15 1996-11-19 Chemical Grouting Company. Ltd. Multi shaft drilling unit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1012505C2 (nl) * 1999-07-02 2001-01-03 Heerema Ondergrondse Infrastru Jetgraafinrichting.
WO2001002692A1 (en) * 1999-07-02 2001-01-11 Heerema Holding Construction Inc. Jet excavating device
US6385868B2 (en) 1999-07-02 2002-05-14 Heerema Holding Construction Inc. Jet excavating device
NL1016917C2 (nl) * 1999-07-02 2002-10-08 Heerema Holding Construction I Jetgraafinrichting.
NL1016952C2 (nl) * 1999-07-02 2002-10-15 Heerema Holding Construction I Jetgraafinrichting.

Also Published As

Publication number Publication date
ITAN970037U1 (it) 1999-01-11
IT243298Y1 (it) 2002-03-04

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