WO1997047824A1 - Systeme d'ancrage ameliore - Google Patents

Systeme d'ancrage ameliore Download PDF

Info

Publication number
WO1997047824A1
WO1997047824A1 PCT/AU1997/000365 AU9700365W WO9747824A1 WO 1997047824 A1 WO1997047824 A1 WO 1997047824A1 AU 9700365 W AU9700365 W AU 9700365W WO 9747824 A1 WO9747824 A1 WO 9747824A1
Authority
WO
WIPO (PCT)
Prior art keywords
anchor
driving tool
borehole
tool
hole
Prior art date
Application number
PCT/AU1997/000365
Other languages
English (en)
Inventor
Ian Robert Macdonald
Ian Grant Macdonald
Original Assignee
Tristanagh Pty. Ltd.
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 Tristanagh Pty. Ltd. filed Critical Tristanagh Pty. Ltd.
Priority to AU30191/97A priority Critical patent/AU723624B2/en
Publication of WO1997047824A1 publication Critical patent/WO1997047824A1/fr

Links

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

Definitions

  • THIS INVENTION relates to an improved anchoring system. BACKGROUND OF THE INVENTION
  • the invention is particularly suitable for, but not limited to, an anchoring system for stabilizing soil formulations, supporting retaining walls or piling, or the like.
  • an anchoring earth system including: an anchor having a body member, two or more anchor flukes pivotally mounted on the body member and movable between a retracted position and n extended position extending substantially radially from the body member, and stop means on the body member to restrain the flukes in the extended position; a screw-threaded rigid tensionable anchor rod adapted to interconnect the anchor to a support member, said anchor being adapted in use to be driven to a required depth in a soil formation by a tubular driving tool extending over the length of said anchor rod.
  • a cutter head may be mounted on the anchor to enable the anchor to drill its own hole in the soil formation as the anchor is rotated and advanced by said driving tool.
  • a cutter head may be formed integrally with said anchor.
  • the body member has a screw-threaded bore to receive one end of the anchor rod.
  • the anchor suitably includes three anchor flukes.
  • said anchor includes stop means to limit the extent of radial extension of said anchor flukes.
  • the anchor system may include spacer means having an annular hub slidably mounted on the anchor rod and a plate extending perpendicularly therefrom, the plate being arranged to engage the plates or wings and urge them towards the extended position as the spacer means is advanced towards the body member by application of tension on the anchor rod.
  • a nut, screw-threadably mounted on the anchor rod is rotatable by the driving tool, having a complementary socket, to advance the spacer means along the anchor rod towards the body member.
  • the driving tool may be adapted to introduce compressed air, water down the tool to clean the hole of debris and/or dry the soil around the hole.
  • Grout may also be pumped down the driving tool and the tool may be withdrawn when the hole is filled with grout.
  • the driving tool may be re-engaged with the anchor after the hole has been cleaned/dried, and grout may be pumped down the hole about said tool, the tool isolating the anchor rod from the grout.
  • the present invention also resides in a method of installing an anchor system, said method comprising the steps 5 of: forming a borehole in an earth formation and extending thereinto by said driving tool an anchor according to a first aspect of the invention; securing an apertured support member against an excavated face of a soil formation over a free end of said anchor rod extending from said 0 borehole; and, tensioning said anchor rod against said support member initially to cause said flukes to move to a radially extended anchoring position and thereafter to induce compression in said earth formation int he region between said anchor and said support member.
  • the borehole may be formed in a soft soil formation by driving the anchor member thereinto by a vibrating force applied by said driving took, with or without rotation of said anchor by said driving tool.
  • a source of compressed air or pressurised water is directed into said driving tool to clear the borehole of loosened soil, and, if o required, to dry the interior of the borehole.
  • a tubular shroud having an annular space about said driving tool is associated with said driving tool to provide temporary support for the borehole wale and, if required an outlet channel for soil removed from said borehole.
  • said borehole is suitably formed by cutting members associated with said anchor, said anchor being rotated by said driving tool.
  • grout is introduced into said borehole via said driving tool to reinforce the o anchoring of said anchor.
  • FIG 1 is a schematic sectional view showing the anchoring system used to support an excavation wall
  • FIG 2 is a sectional side view showing the system used to support a pile
  • FIG 3 is a sectional plan view of the detail A in FIG 2;
  • FIGS 4 and 5 are respective perspective views of an anchor of a first embodiment
  • FIGS 6 and 7 are perspective views of an anchor of a second embodiment
  • FIG 8 is a perspective view of the components of the system of a third embodiment (the anchor rod being omitted); and FIG 9 is a rear view of the anchor of FIG 8.
  • the anchoring system 10 is used to stabilize the wall 21 of an excavation 20, where a support plate 22 interconnects the anchor rod 50 of an anchor system to enable tension to be applied to the anchor rod 50 to reinforce the earth formation by induction of a compression zone between the exposed wall 21 of excavation 20 and anchor 9 at the opposite end of rod 50.
  • the anchoring system 10 is used to support a contoured sheet pile 23 where a tensioning plate 24 engages a pair of lock plates 25 provided against the outer face of the sheet pile 23.
  • the screw threaded anchor ord is tensioned by threaded nut 26 after driving tool 70 (shown in phantom) is removed and a mass of grout 90 is inserted into the borehole.
  • an anchor 40 has a body 41 with a screw-threaded bore 42.
  • Three flanges 43 extend substantially radially from the body 41 and an anchor fluke 44 is hingedly mounted on each flange 43 via a hinge pin 45.
  • Each flange 43 has an abutment face 46 to limit the radial extension of the anchor plates 44.
  • the plates 44 are swung downwardly in the direction of the arrows B to be substantially parallel to, but trail, the body 41 when the anchor 40 is advanced down the hole.
  • the cutter 80 is mounted at the forward end of the body 41 to cut the hole for the anchor 40 as it is rotated and advanced.
  • the cutter has a blade 81 , with cutting tip 82, and a shank 83 received in the bore 42 of the body 41.
  • a spacer 84 is interposed between the blade 81 and the anchor body 41.
  • FIGS 8 and 9 show a modified form of the anchor where the tips of the anchor plates 44 have V-shaped recesses 48 to form soil engaging tips 49.
  • the leading shoulders As an alternative to hole cutter 80, the leading shoulders
  • flanges 43 may be tapered to form a cutting edge and, if required, faced with a Stellite (TM) or similar hard facing for cutting purposes.
  • TM Stellite
  • An insert spacer 60 has a tubular body 61 , with a plain bore 62, and a hexagonal plate 63.
  • a nut 64 has a screw-threaded bore 65 engageable with the tension rod 50.
  • a driving tool 70 with a socket 71 at one end is operable to rotate the nut 64 to advance the spacer 60 towards the body 41 of the anchor 40, the plate 63 engaging the anchor flukes 44 and causing them to be swung out from the retracted position in FIG 8 to the extended position in FIG 9.
  • the hole 11 for the anchoring system may be pre-drilled by a conventional earth boring drill. However, it is preferred that a cutting anchor 40 mounted on the anchor rod 50, be rotated and advanced by the driving tool coupled to a drive system of an excavator or the like to drill the hole 11. During this stage, the anchor plates 44 are retracted and lie along the anchor rod 50 - see FIG 8.
  • the driving tool 70 is inserted down the hole 1 1 with anchor rod 50 located therein.
  • the socket 71 is engaged with the nut 64 and the cutter is rotated to advance the insert spacer 60 towards the body 41 of the anchor, causing the anchor plates 44 to be swung outwardly into engagement with the soil around the hole 11.
  • the driving tool 70 is retracted to release the socket 71 from the nut 64. Compressed air is pumped down the bore of the driving tool
  • Grout 90 can be pumped down the tool 70 and the operator is aware that the hole 11 is full of grout when it fills the annular space between the tool 70 and the hole wall.
  • the tool 70 may be withdrawn from the hole 11 for re-use.
  • the anchor rod 50 is then pre-tensioned as shown in FIG 1 , or FIGS 2 and 3, to prestress the grout 90 before it sets. After about 24 hours the anchor rod may be fully stressed to a required limit.
  • the tool 70 may be re-engaged with the nut 64, after the compressed air is pumped down the tool, to enclose the anchor rod 50 to protect the latter from grout 90 pumped down the annular space defined by the tool 70 and the hole wall.
  • the driving tool 70 can have several functions to drive the anchor to a required depth by vibration in soft soils or, with a cutting head to rotate the anchor to form the borehole, to direct a source of pressurized fluid to clear the borehole of loosened earth, to open the anchor plates 44 to engage the anchor 40 in the hole 11 , and as a grout tube when the hole 11 is filled with grout.
  • the anchor 40 can have two or more anchor plates 44 and can be used in a wide range of soils, eg., clay, sand, shale, reclaimed swamp, rock, etc.
  • the system 10 can be used in a wide array of applications where structural support is required.
  • the anchor 40 can be rotated by the anchor rod 50 with the anchor plates 44 extended to form a cavity about the anchor to enable formation of an enlarged mass of grout or a "deadman" to be formed when grout is pumped down driving tool 70. This increases the holding power of the anchor in the earth formation.
  • two or more of the anchors 40 can be provided along the anchor rod 50 at spaced intervals.

Landscapes

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

Abstract

La présente invention concerne un système d'ancrage pour formations de terrain comprenant une tête d'ancre (40) munie d'au moins deux pattes pivotantes (44) pouvant être déplacées d'une position rétractée à une position étendue afin de fixer l'ancre au fond d'un trou de forage. La tête d'ancre (44) est attachée à une barre de tension rigide (50) autour de laquelle vient se placer un outil d'entraînement tubulaire (70) qui permet d'insérer la tête de l'ancre dans des sols rocheux à l'aide de lames coupantes (43a). Une enveloppe tubulaire rétractable s'étend autour de l'outil d'entraînement de manière à former un conduit par lequel la terre désagrégée peut être évacuée sous la pression d'un fluide pressurisé dirigé dans l'outil d'entraînement (70). Ledit outil d'entraînement (70) est aussi utilisé pour introduire du coulis dans le trou de forage. L'outil d'entraînement (70) est muni, à une extrémité, d'un bout femelle (71) lui permettant de faire tourner un écrou (64) pour faire avancer une pièce d'écartement (60) vers le corps (41) de l'ancre (40) et, ce faisant, écarter les bras de leur position rétractée.
PCT/AU1997/000365 1996-06-07 1997-06-10 Systeme d'ancrage ameliore WO1997047824A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU30191/97A AU723624B2 (en) 1996-06-07 1997-06-10 Improved anchoring system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPO0396A AUPO039696A0 (en) 1996-06-07 1996-06-07 Improved anchoring system
AUPO0396 1996-06-07

Publications (1)

Publication Number Publication Date
WO1997047824A1 true WO1997047824A1 (fr) 1997-12-18

Family

ID=3794714

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1997/000365 WO1997047824A1 (fr) 1996-06-07 1997-06-10 Systeme d'ancrage ameliore

Country Status (2)

Country Link
AU (1) AUPO039696A0 (fr)
WO (1) WO1997047824A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001096670A1 (fr) * 2000-06-12 2001-12-20 Graham Hargrave Menz Ancre a grande capacite
ITFI20100038A1 (it) * 2010-03-15 2011-09-16 Cooperativa Co Me A Soc Coop Di Lavoro A R L Dispositivo di fissaggio al terreno.
JP2014156698A (ja) * 2013-02-14 2014-08-28 Raito Kogyo Co Ltd 地盤の補強工法及び補強構造
US9540783B2 (en) 2008-02-14 2017-01-10 Ioannis Lymberis Tie rod for structural projects
CN110481709A (zh) * 2019-09-05 2019-11-22 厦门芒娅贸易有限公司 一种可伸缩的便于回收型船锚
US10815676B2 (en) 2010-05-10 2020-10-27 Flooring Industries Limited, Sarl Floor panel
CN112413543A (zh) * 2020-10-16 2021-02-26 成都华体慧城科技有限公司 一种灯杆安装座、灯杆及灯杆的安装方法
US12031337B2 (en) 2010-05-10 2024-07-09 Unilin, Bv Floor panel

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1636617A (en) * 1926-10-05 1927-07-19 Scott Charles Benjiman Anchor
US1850147A (en) * 1928-09-20 1932-03-22 Frank W Aiken Anchor
GB656663A (en) * 1949-04-28 1951-08-29 Jack Miles Reid A means for anchoring straining wire rods and the like to the ground
SU676685A1 (ru) * 1976-08-02 1979-07-30 Н. К. Виноградов Винтовой анкер виноградова
GB2100314A (en) * 1981-05-01 1982-12-22 Wise Edgar Gerald Recoverable ground anchor having variable resistance to extraction
SU1071706A1 (ru) * 1980-11-12 1984-02-07 Государственный Научно-Исследовательский И Проектный Институт Нефтяной И Газовой Промышленности Им.В.И.Муравленко "Гипротюменнефтегаз" Грунтовый анкер
US4593500A (en) * 1983-08-01 1986-06-10 Morrow Manufacturing Co., Inc. Earth anchor with load plate

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1636617A (en) * 1926-10-05 1927-07-19 Scott Charles Benjiman Anchor
US1850147A (en) * 1928-09-20 1932-03-22 Frank W Aiken Anchor
GB656663A (en) * 1949-04-28 1951-08-29 Jack Miles Reid A means for anchoring straining wire rods and the like to the ground
SU676685A1 (ru) * 1976-08-02 1979-07-30 Н. К. Виноградов Винтовой анкер виноградова
SU1071706A1 (ru) * 1980-11-12 1984-02-07 Государственный Научно-Исследовательский И Проектный Институт Нефтяной И Газовой Промышленности Им.В.И.Муравленко "Гипротюменнефтегаз" Грунтовый анкер
GB2100314A (en) * 1981-05-01 1982-12-22 Wise Edgar Gerald Recoverable ground anchor having variable resistance to extraction
US4593500A (en) * 1983-08-01 1986-06-10 Morrow Manufacturing Co., Inc. Earth anchor with load plate

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DERWENT ABSTRACT, Accession No. 84-248749/40, Class Q24, Q42; & SU,A,1 071 706 (PETROL GAS RES), 7 February 1984. *
DERWENT ABSTRACT, Accession No. D1124C/14, Class Q42; & SU,A,676 685 (VINOGRDOV), 2 August 1979. *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001096670A1 (fr) * 2000-06-12 2001-12-20 Graham Hargrave Menz Ancre a grande capacite
US9540783B2 (en) 2008-02-14 2017-01-10 Ioannis Lymberis Tie rod for structural projects
ITFI20100038A1 (it) * 2010-03-15 2011-09-16 Cooperativa Co Me A Soc Coop Di Lavoro A R L Dispositivo di fissaggio al terreno.
US11377857B2 (en) 2010-05-10 2022-07-05 Flooring Industries Limited, Sarl Floor panel
US11193282B2 (en) 2010-05-10 2021-12-07 Flooring Industries Limited, Sarl Floor panel
US10815676B2 (en) 2010-05-10 2020-10-27 Flooring Industries Limited, Sarl Floor panel
US10876303B2 (en) 2010-05-10 2020-12-29 Flooring Industries Limited, Sarl Floor panel
US10889998B2 (en) 2010-05-10 2021-01-12 Flooring Industries Limited, Sarl Floor panel
US10927553B2 (en) 2010-05-10 2021-02-23 Flooring Industries Limited, Sarl Floor panel
US12031337B2 (en) 2010-05-10 2024-07-09 Unilin, Bv Floor panel
US12012764B2 (en) 2010-05-10 2024-06-18 Unilin Bv Floor panel
US11236514B2 (en) 2010-05-10 2022-02-01 Flooring Industries Limited, Sarl Floor panel
US11976471B2 (en) 2010-05-10 2024-05-07 Unilin Bv Floor panel
US11505949B2 (en) 2010-05-10 2022-11-22 Flooring Industries Limited, Sarl Floor panel
JP2014156698A (ja) * 2013-02-14 2014-08-28 Raito Kogyo Co Ltd 地盤の補強工法及び補強構造
CN110481709A (zh) * 2019-09-05 2019-11-22 厦门芒娅贸易有限公司 一种可伸缩的便于回收型船锚
CN112413543A (zh) * 2020-10-16 2021-02-26 成都华体慧城科技有限公司 一种灯杆安装座、灯杆及灯杆的安装方法

Also Published As

Publication number Publication date
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