WO1993001360A1 - A method of installing a soil anchor and a soil anchor - Google Patents

A method of installing a soil anchor and a soil anchor Download PDF

Info

Publication number
WO1993001360A1
WO1993001360A1 PCT/SE1992/000508 SE9200508W WO9301360A1 WO 1993001360 A1 WO1993001360 A1 WO 1993001360A1 SE 9200508 W SE9200508 W SE 9200508W WO 9301360 A1 WO9301360 A1 WO 9301360A1
Authority
WO
WIPO (PCT)
Prior art keywords
anchor
anchor body
line
soil
yoke
Prior art date
Application number
PCT/SE1992/000508
Other languages
French (fr)
Inventor
Bo Torbjörn SKOGBERG
Original Assignee
Soilex Ab
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 Soilex Ab filed Critical Soilex Ab
Priority to EP92915020A priority Critical patent/EP0592567B1/en
Priority to DE69217369T priority patent/DE69217369T2/en
Priority to KR1019930704077A priority patent/KR940701486A/en
Priority to JP4511591A priority patent/JP2972337B2/en
Publication of WO1993001360A1 publication Critical patent/WO1993001360A1/en

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
    • E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
    • E02D5/765—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor removable
    • 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
    • E02D5/805—Ground anchors with deformable anchoring members
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2600/00—Miscellaneous
    • E02D2600/30—Miscellaneous comprising anchoring details

Definitions

  • This invention relates to a method o installing a sail anchor by driving down an expansible anchor body of folded metal sheet into the ground by means of a rod or tube and then pressurizing the body to develop the folds and expand the body. It also relates to an anchor body.
  • An anchor body and a method of this kind are described in EP 0112316-A.
  • a tube is used for driving down the anchor body and then it is used for injecting cement grout into the anchor body to expand the body.
  • One or more reinforcing rods or stiff steel ropes or the like are forced down through the tube and into the anchor body and theyare then used to take the tension load. This method is being used and it is outstanding.
  • the anchor cannot be used until the cement grout has hardened which takes days or almost a week. It is also sometimes a disadvantage that the tube with its tension load carrying elements will remain in the soil and that it cannot be dug up without first being cut into pieces.
  • Fig 1 shows an anchor while driven into the soil
  • Fig 3 shows the same anchor while being dismounted
  • Fig 4 shows enlarged the front end of the anchor shown in Figs 1-3
  • Fig 5 is a section along the lines 5-5 in Fig 4 In Figs 1-3, an expansible anchor body 11 is shown. It is generally of the kind described in EP-0112316-A and will therefore not be described in detail but EP-0112316-A is incorporated by way of reference.
  • the anchor body 11 is made of two steel sheets that are welded together along their longitudinal edges and folded in a zig zag form so that they form a cylindrical pole with rectangular or quadratic cross section(Fig 1).
  • a cup 12 covers and seals the front end of the pole and an annular cup 13 surrounds the rear upper end of the pole.
  • Four flats 14 are welded to the cups 12,13. There is a sealing viscos agent, for example asphalt, in the cups 12,13 and the cups are held together by the flats 14.
  • a solid steel block 15 is welded to the rear cup 13 and it has a blind bore 16 for the end of a rock drill extension rod 17 and a bore 18 with a fitting for a hose 19.
  • the bore 18 ends in the center of the annular cup 13, that is, it is open to the interior space of the folded steel sheets.
  • a pressure fluid for example cement grout
  • the folded sheet metal body lldevelops into a circular cylinder with conical ends (Fig 2).
  • the flats 14 still hold the cups 12, 13 in place.
  • FIG. 4 shows the front end of the anchor body 11.
  • a part of a pulley 22 with three grooves for three tension lines for example steel ropes or strands, is welded to the cup 12. It is protected by a steel plate 23 that is carried by two rigid bolts 24,25 that are also welded to the cup 12.
  • a bow-formed plate 26 is supported by support plates 27,28 welded to the plates 23,26.
  • one of three parallel steel ropes 29 can be seen. They are deviated over the bow-formed support 22 (the part of a pulley) .
  • the hose 19 is coupled to the block 15 and the three parallel steel ropes 29 are inserted between their bow-formed support 22 and their bow-formed protection plate 26.
  • a conventional crawler drill rig with a rock drilling machine can advantageously be used to hammer down the anchor body 11 with the end of the drill rod 17 inserted in the blind bore 16 of the block 15. The rotation should of course be off.
  • the anchor body pulls the hose 19 and the three steel ropes 29 with it as it is forced down into the soil.
  • the drill rod which is a conventional extension rod
  • a conventional cement grout pump is coupled to the hose 19 and cement grout is injected into the anchor body 11 to inflate it
  • the steel ropes 29 are forced outwardly by the anchor body 11 and their deviation angle is reduced,
  • the six ends of the steel ropes can be coupled and tension loaded almost immediately since they will only apply compressive forces on the anchor body and the cement grout can stand the compressive forces almost immediately.
  • the flats 14 will be between the ropes 29 and the anchor body 11 which is advantageous since it will distribute the load. It is an advantage that the ropes are not loaded until their angle of deviation has been reduced due to the inflation of the anchor body 11.
  • the two ends of each rope should be equally tension loaded in order to avoid slippage in the rope support 22 at the front end of the anchor body 11.
  • a modified steel rope arrangement is shown in Figures 6-8.
  • Four steel ropes 29 are coupled to a yoke 40 at the front end of the anchor body 11. By pulling only one or two of the ropes, the yoke will detach from the anchor body and the ropes and the yoke can be pulled out of the soil.

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

A soil anchor body (11) of folded sheet steel is hammered down into the soil by means of a rock drill rig. It carries with it a hose (19) coupled to its rear end and one or more steel ropes (29) deviated over its front end. The drill rod is withdrawn and cement grout is injected through the hose into the anchor body to inflate it. The steel ropes are now anchored and both ends of each rope are above ground and ready to be used to take tension load. If the soil anchor is only temporary used, the steel ropes can be withdrawn simply by being pulled at one end.

Description

A METHOD OF INSTALLING A SOIL ANCHOR AND A SOIL ANCHOR.
This invention relates to a method o installing a sail anchor by driving down an expansible anchor body of folded metal sheet into the ground by means of a rod or tube and then pressurizing the body to develop the folds and expand the body. It also relates to an anchor body.
An anchor body and a method of this kind are described in EP 0112316-A. In practice, a tube is used for driving down the anchor body and then it is used for injecting cement grout into the anchor body to expand the body. One or more reinforcing rods or stiff steel ropes or the like are forced down through the tube and into the anchor body and theyare then used to take the tension load. This method is being used and it is outstanding.
It is, however, a disadvantage that the anchor cannot be used until the cement grout has hardened which takes days or almost a week. It is also sometimes a disadvantage that the tube with its tension load carrying elements will remain in the soil and that it cannot be dug up without first being cut into pieces.
It is an object of the invention to make an anchor of this kind less costly and to make possible the use of an anchor almost immediatly it has been installed. It is also an object to make it possible to take up the anchor except for the anchor body fast and easily.
The invention will be described with reference to the drawings.
Fig 1 shows an anchor while driven into the soil
Fig 2 shows the same anchor expanded
Fig 3 shows the same anchor while being dismounted
Fig 4 shows enlarged the front end of the anchor shown in Figs 1-3
Fig 5 is a section along the lines 5-5 in Fig 4 In Figs 1-3, an expansible anchor body 11 is shown. It is generally of the kind described in EP-0112316-A and will therefore not be described in detail but EP-0112316-A is incorporated by way of reference. The anchor body 11 is made of two steel sheets that are welded together along their longitudinal edges and folded in a zig zag form so that they form a cylindrical pole with rectangular or quadratic cross section(Fig 1). A cup 12 covers and seals the front end of the pole and an annular cup 13 surrounds the rear upper end of the pole. Four flats 14 are welded to the cups 12,13. There is a sealing viscos agent, for example asphalt, in the cups 12,13 and the cups are held together by the flats 14. A solid steel block 15 is welded to the rear cup 13 and it has a blind bore 16 for the end of a rock drill extension rod 17 and a bore 18 with a fitting for a hose 19. The bore 18 ends in the center of the annular cup 13, that is, it is open to the interior space of the folded steel sheets. When a pressure fluid, for example cement grout, is supplied under pressure through the hose 19, the folded sheet metal body lldevelops into a circular cylinder with conical ends (Fig 2). During this inflation, the flats 14 still hold the cups 12, 13 in place.
Figur 4 shows the front end of the anchor body 11. A part of a pulley 22 with three grooves for three tension lines, for example steel ropes or strands, is welded to the cup 12. It is protected by a steel plate 23 that is carried by two rigid bolts 24,25 that are also welded to the cup 12. A bow-formed plate 26 is supported by support plates 27,28 welded to the plates 23,26. In Figures 1-3, one of three parallel steel ropes 29 can be seen. They are deviated over the bow-formed support 22 (the part of a pulley) .
A sequence for the installation of the anchor will now be described.
The hose 19 is coupled to the block 15 and the three parallel steel ropes 29 are inserted between their bow-formed support 22 and their bow-formed protection plate 26. A conventional crawler drill rig with a rock drilling machine can advantageously be used to hammer down the anchor body 11 with the end of the drill rod 17 inserted in the blind bore 16 of the block 15. The rotation should of course be off. The anchor body pulls the hose 19 and the three steel ropes 29 with it as it is forced down into the soil. When the anchor body has reached a competent layer, the drill rod, which is a conventional extension rod, is withdrawn and a conventional cement grout pump is coupled to the hose 19 and cement grout is injected into the anchor body 11 to inflate it, The steel ropes 29 are forced outwardly by the anchor body 11 and their deviation angle is reduced, The six ends of the steel ropes can be coupled and tension loaded almost immediately since they will only apply compressive forces on the anchor body and the cement grout can stand the compressive forces almost immediately. The flats 14 will be between the ropes 29 and the anchor body 11 which is advantageous since it will distribute the load. It is an advantage that the ropes are not loaded until their angle of deviation has been reduced due to the inflation of the anchor body 11. The two ends of each rope should be equally tension loaded in order to avoid slippage in the rope support 22 at the front end of the anchor body 11.
Most anchors are used only temporary and it is an advantage that the steel ropes can be withdrawn when the anchor has been used. As can be seen in Figure 3, simply by pulling one end of the rope the rope can be withdrawn. The rope will slide in its support 22.
A modified steel rope arrangement is shown in Figures 6-8. Four steel ropes 29 are coupled to a yoke 40 at the front end of the anchor body 11. By pulling only one or two of the ropes, the yoke will detach from the anchor body and the ropes and the yoke can be pulled out of the soil.

Claims

Claims
1. A method of installing a soil anchor by driving down an inflatable anchor body (11) of folded metal sheet into the ground by means of a rod and then pressurizing the body to develop the folds and expand the body characterized by the steps of
coupling a tension line (29) and a pressure hose (19) to the anchor body (11) so that the anchor body takes them with it into the ground, withdrawing the rod, expanding the anchor body by pressurizing it through the hose, and tensioning the line.
2. A method according to claim 1, characterized by coupling the line (29) to the anchor body (11) outside of the body,
3. A method according to claim 2, characterized by deviating the line (29) about the front end of the anchor body (11) to couple it to the anchor body so that there will be two ends of the line above ground.
4. A method according to claim 3, characterized by coupling two or more lines (29) in parallell to the anchor body (11).
5. A method according to claim 3 or 4, characterized by mounting a bow-formed line support (22) on the front end of the anchor body (11) and deviating the line (29) about the support.
6. A method according to any one of claims 3 to 5 for installing a temporary soil anchor, characterized by the step of pulling one end of the line (29) to get the line out of the ground when the anchor has been used.
7. A metod according to any one of claims 2 to 6 for installing a temporary soil anchor, characterized by coupling at least two lines (29) to a yoke (40) and mounting the yoke on the front end of the anchor body (11) and pulling up the yoke by pulling one of the lines to release the yoke from the anchor body when the anchor has been used.
8. A method according to claim 7, characterized by mounting three lines (29) to the yoke (40),
9. A method according to any one of the preceding claims, characterized by hammering down the anchor body (11) by hammering on the rod (17) which is an extension rod, for example a conventional rock drill extension rod.
10. An inflatable soil anchor body (11) made of folded sheet metal that is sealed in both ends and has an inlet (18) for pressure fluid at its rear end,
characterized by a bow-formed support (22) for a steel rope (29) at its front end, said support permitting the rope to slide therein.
PCT/SE1992/000508 1991-07-01 1992-07-01 A method of installing a soil anchor and a soil anchor WO1993001360A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP92915020A EP0592567B1 (en) 1991-07-01 1992-07-01 A method of installing a soil anchor and a soil anchor
DE69217369T DE69217369T2 (en) 1991-07-01 1992-07-01 METHOD FOR INSERTING A FLOOR ANCHOR AND FLOOR ANCHOR
KR1019930704077A KR940701486A (en) 1991-07-01 1992-07-01 How to install ground anchors and ground anchors
JP4511591A JP2972337B2 (en) 1991-07-01 1992-07-01 Method of installing underground anchor and underground anchor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9102054-5 1991-07-01
SE9102054A SE470406B (en) 1991-07-01 1991-07-01 Procedure for inserting drawbar and one drawbar

Publications (1)

Publication Number Publication Date
WO1993001360A1 true WO1993001360A1 (en) 1993-01-21

Family

ID=20383225

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1992/000508 WO1993001360A1 (en) 1991-07-01 1992-07-01 A method of installing a soil anchor and a soil anchor

Country Status (10)

Country Link
US (1) US5465535A (en)
EP (1) EP0592567B1 (en)
JP (1) JP2972337B2 (en)
KR (1) KR940701486A (en)
AU (1) AU2301792A (en)
CA (1) CA2112741A1 (en)
DE (1) DE69217369T2 (en)
SE (1) SE470406B (en)
TW (1) TW207562B (en)
WO (1) WO1993001360A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5465535A (en) * 1991-07-01 1995-11-14 Soilex Ab Method of installing a soil anchor and a soil anchor
EP1046752A1 (en) * 1999-04-20 2000-10-25 BBR Systems Ltd. Ground anchor

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6918213B2 (en) 2002-04-29 2005-07-19 Stallion Fence Accessories Plastic pergola end caps of extended length
AT501875B1 (en) * 2005-06-07 2008-05-15 Alwag Tunnelausbau Gmbh METHOD AND DEVICE FOR DRILLING, IN PARTICULAR FITTING OR TURNING OF A HOLE IN GROUND OR ROCK MATERIAL
JP4450862B1 (en) * 2009-09-01 2010-04-14 弘和産業株式会社 Folding structure of bag
CN102650132B (en) * 2012-05-15 2014-09-10 中国京冶工程技术有限公司 Embedded recoverable expansion anchor cable and construction method thereof
CN103806446B (en) * 2014-02-21 2015-07-08 易朋莹 Internally-supporting expansion type anchor rod
CN104278674B (en) * 2014-09-22 2015-12-16 华汇工程设计集团股份有限公司 A kind of callable expansion head anchor pole and construction method thereof
CN106245645B (en) * 2016-09-18 2018-06-05 上海胜义环境科技有限公司 It is a kind of recyclable from anchoring anchor rope component and construction method
CN108775014B (en) * 2018-06-27 2021-03-02 刘晓理 Construction method of rotary spraying anchor cable or rotary spraying anchor rod with umbrella-shaped expanding structure

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4000623A (en) * 1974-05-31 1977-01-04 Pietro Meardi Anchor rod for walls, bulkheads and the like
SE408074B (en) * 1974-06-18 1979-05-14 Losinger Ag PROCEDURE AND DEVICE FOR UNLOADING AND REMOVING AN ANCHOR ANCHORED IN THE GROUND
EP0079875A1 (en) * 1981-11-16 1983-05-25 Bo Torbjörn Skogberg Expansion body
EP0112316A2 (en) * 1982-12-21 1984-06-27 Atlas Copco Aktiebolag Expansion body
WO1991006713A1 (en) * 1989-10-24 1991-05-16 Groutco (Aust.) Pty. Ltd. Inflatable ground anchor

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US1101364A (en) * 1913-07-03 1914-06-23 Oliver D Wallett Concrete-pile former.
FR1368123A (en) * 1963-01-28 1964-07-31 Ct Ex De Rech S Et D Etudes Du Anchoring method and removable anchoring device
US3371494A (en) * 1966-02-04 1968-03-05 Atlas Copco Ab Method and means of anchoring an object in the ground
US3377807A (en) * 1966-06-15 1968-04-16 Nave Vincent Anchor bolt assembly
US3436923A (en) * 1966-07-07 1969-04-08 Atlas Copco Ab Method and equipment for making tension anchors
DE2041526C3 (en) * 1970-08-21 1980-06-04 Dyckerhoff & Widmann Ag, 8000 Muenchen Tension member for a grouting anchor
DE2147051A1 (en) * 1971-09-21 1973-04-05 Dyckerhoff & Widmann Ag PROCEDURE FOR MAKING A PRESSURE POST IN THE SOIL
IT1078510B (en) * 1975-11-11 1985-05-08 F Soc An Fondedile Spa Ora Fon FOUNDATION POLE FOR ALTERNATE COMPRESSION AND TRACTION EFFORTS
US4096673A (en) * 1976-03-19 1978-06-27 Foresight Industries Method of anchoring
SU1294921A1 (en) * 1983-11-18 1987-03-07 Научно-исследовательский институт оснований и подземных сооружений им.Н.М.Герсеванова Reinforcement member for strengthening soil foundation
SE470406B (en) * 1991-07-01 1994-02-14 Soilex Ab Procedure for inserting drawbar and one drawbar

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4000623A (en) * 1974-05-31 1977-01-04 Pietro Meardi Anchor rod for walls, bulkheads and the like
SE408074B (en) * 1974-06-18 1979-05-14 Losinger Ag PROCEDURE AND DEVICE FOR UNLOADING AND REMOVING AN ANCHOR ANCHORED IN THE GROUND
EP0079875A1 (en) * 1981-11-16 1983-05-25 Bo Torbjörn Skogberg Expansion body
EP0112316A2 (en) * 1982-12-21 1984-06-27 Atlas Copco Aktiebolag Expansion body
WO1991006713A1 (en) * 1989-10-24 1991-05-16 Groutco (Aust.) Pty. Ltd. Inflatable ground anchor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5465535A (en) * 1991-07-01 1995-11-14 Soilex Ab Method of installing a soil anchor and a soil anchor
EP1046752A1 (en) * 1999-04-20 2000-10-25 BBR Systems Ltd. Ground anchor

Also Published As

Publication number Publication date
JP2972337B2 (en) 1999-11-08
DE69217369T2 (en) 1997-08-21
KR940701486A (en) 1994-05-28
EP0592567A1 (en) 1994-04-20
DE69217369D1 (en) 1997-03-20
SE9102054L (en) 1993-01-02
CA2112741A1 (en) 1993-01-21
AU2301792A (en) 1993-02-11
SE470406B (en) 1994-02-14
US5465535A (en) 1995-11-14
SE9102054D0 (en) 1991-07-01
JPH06510342A (en) 1994-11-17
TW207562B (en) 1993-06-11
EP0592567B1 (en) 1997-02-05

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