EP1154077A1 - Ancrage injecté récupérable - Google Patents

Ancrage injecté récupérable Download PDF

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Publication number
EP1154077A1
EP1154077A1 EP01111051A EP01111051A EP1154077A1 EP 1154077 A1 EP1154077 A1 EP 1154077A1 EP 01111051 A EP01111051 A EP 01111051A EP 01111051 A EP01111051 A EP 01111051A EP 1154077 A1 EP1154077 A1 EP 1154077A1
Authority
EP
European Patent Office
Prior art keywords
pressure
anchor
elements
anchor according
grout
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.)
Granted
Application number
EP01111051A
Other languages
German (de)
English (en)
Other versions
EP1154077B1 (fr
Inventor
Reinhard Klöckner
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.)
DYWIDAG-Systems International GmbH
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
Priority to EP04020952A priority Critical patent/EP1486617A1/fr
Publication of EP1154077A1 publication Critical patent/EP1154077A1/fr
Application granted granted Critical
Publication of EP1154077B1 publication Critical patent/EP1154077B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E02D5/76—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

Definitions

  • the invention relates to a removable Anchors according to the generic terms of the independent Claims.
  • Injection anchors according to EN 1537 or DIN 4125 mostly exist from a tension member, usually from prestressing steel in the form of rods, wires or strands, for the purpose the re-anchoring of a component or a building pit wall in a borehole in the underground used and by pressing in a hardening medium, usually a cement suspension, combined with Is brought underground.
  • a hardening medium usually a cement suspension
  • the lower part of one Ankers is designed as an adhesive or composite section, while in the upper part, free steel length or Free play track called, the tension member for the purpose of Preload can be freely stretched using hydraulic equipment remains.
  • the tension member is in his whole length in a cladding tube without contact to the Compressed body and is in the bonded area of the pressure pipe enclosed in which the anchor force at the bottom an anchor foot construction is initiated, and that this over the hardened grout into the ground transmits.
  • the longitudinal force in the pressure pipe is on whose lower end its maximum value, namely in the Contact joint to the anchor foot, and then builds up to the upper one ("airside") end continuously.
  • the outer surface of the pressure pipe must be sufficient be strongly profiled to the anchor force without "internal bond fracture" on the surrounding grout from cement mortar and on to the soil can.
  • the pressure pipe anchor has a pressure pipe made of highly pressure-resistant, but brittle, easily destructible material in the ground and a steel tension member that, after use of the anchor at the anchor base and in its entire Length can be removed from the surface.
  • the pressure pipe according to the invention is such that for example with the drill piping used in anchor construction ⁇ 133 mm with a temporary grout anchor approx. 1,000 kN working load can be installed, and that after removing the tension member only a few steel parts small size remain in the underground.
  • the pressure pipe of the grout anchor according to the invention exists for this from a sequence of strings hollow cylindrical pressure elements, either a have circular cylindrical shape, or the preferred each of two half-shells or several segment-shaped, together slats forming a circular cross-section of the same length are combined, and that from one non-metallic, mineral material high Strength are made, as preferred, from glass, however also ceramics, glass ceramics etc. or from a high-strength Special concrete such as Ductal from Lafarge, France.
  • the steel tension member is in the Anchor base plate, also called a wedge support plate, with Help of the so-called two or three-part known Segment wedges anchored in matching ones conical holes in the washer and sit under the tensile load of the strands by means of an internal toothing bite into this.
  • the first of the two methods is characterized by this from that the wedge support plate of the anchor foot is not, as usual, is made monolithically from steel. Rather, it consists only in its high ring strain Edge area and the bottom - like a thick-walled rifle with conical wall - made of steel high strength, while the inner area in which the cone holes for the wedges are from one only moderately tensile and pressure resistant, but with relative low temperature fusible material.
  • the core area of the wedge carrier plate can metals such as zinc, tin, aluminum, magnesium etc. or their alloys, or also high pressure and creep-resistant plastics are used.
  • metals such as zinc, tin, aluminum, magnesium etc. or their alloys, or also high pressure and creep-resistant plastics are used.
  • eutectic alloys of the o. G. Metals in question, or those by the chosen Mixing ratio allow optimization between the compressive strength, the highest possible, and the Melting temperature, which should be as low as possible.
  • alumino-thermal incendiary device with electrical Ignition can be used, which is preferred behind the plate can be installed.
  • Such an incendiary device can be designed and dimensioned in this way that it is sufficient to make the wedge support plate monolithic made of steel, without the easily meltable core area to manufacture.
  • reaction mixture of A pyrotechnic propellant such as calcium or add magnesium carbonate to create a "blow-out effect" to generate the fire set towards the span channel or to reinforce.
  • a pyrotechnic propellant such as calcium or add magnesium carbonate
  • This effect causes the strands of the tension member are targeted by the hot reaction gases, in which also portions of molten iron melt can be carried in the sense of a "Flame rays" hit and weakened at certain points or be cut, which is why suitable for this purpose Channels are provided in the wedge support plate.
  • Fig. 1 shows the view of the grout anchor according to the invention in the borehole, including the steel tension member 1, the tension elements 2 in the HDPE cladding tube 3 and the Pressure pipe 4, consisting of pairs assembled Half shells 5, which have their outer profile 6 the anchor force on the pressing body 7 and on deliver to the subsurface 8.
  • the anchor base construction 9 At the bottom end of the anchor there is the anchor base construction 9, the introduces the anchor force from the tension member 1 into the pressure tube 4, and in which the tension elements 2 are fanned out and are anchored, see also Fig. 4, 5 and 8.
  • FIG. 2 and 3 show one in longitudinal and cross section any section of the invention the half-shell pressure elements 5 assembled Pressure pipe - without the steel tension member 1 or 2 and whose cladding tube 3 -, the half-shells not with plane-parallel sawn ends, but with the manufacturing-related slope 5a are shown.
  • the End joint 10 between the pressure elements 5 is optional with the intermediate ring 11 or the spacer 12 equipped, both in Fig. 2 each half to be shown.
  • the pressure elements 5 are with the outer profile 6 provided, which preferably consists of a Grid consists of joined pyramids 6a, between those bearing in the direction of force Ribs 6b remain.
  • V-shaped Grooves 13 along the side edges of the pressure elements 5 are those for re-pressing to increase the Load capacity of the anchors indispensable in poor subsoil Post injection lines 14 housed where they protrude only slightly from the circumferential circle of the pressure pipe and so against damage during installation and Drilling operations are safely protected.
  • the grooves 15 lie along the inside of the pressure elements 5 the tension wires 16 to stabilize the pressure pipe during transportation and installation of the anchors.
  • the assembly of the pressure pipe can optionally be on site with the help of a mounting rail in the immediate vicinity to the borehole or on the table of the Factory hall, after which the pressure pipe expediently for transport through a pushed-over PVC pipe is to be protected.
  • Fig. 4 only in longitudinal section - the connection of the steel tension member 1 or 2 with the cladding tube 3 the anchor foot construction 9 shown corresponding the invention without widening the cladding tube 3 in the area the printing elements 5 gets by.
  • the base plate 17 of the anchor foot receives a continuous Center bore 18, which is only slightly larger is as the outer diameter of the cladding tube 3.
  • the Drilling is made with a profile or an inside Provided thread 19, in which the PE material the cladding tube wall is pressed in and fixed after heated up at the end and with the help of the pressed Pipe nozzle 20 was fixed there.
  • the one described Connection is secure against loosening during transport and installation of the anchor as against the penetration of cement mortar during the pressing and post-pressing process.
  • the base plate 17 of the anchor foot construction of the anchor according to the invention can optionally from one highly pressure-resistant but brittle glass fiber laminate be made in the ground, like the entire pressure pipe, by trench wall milling etc. can be destroyed.
  • the pressure piece 21 preferably made of glass - here with sawn parallel Ends - manufactured and preferred with the pressure ring 22 made from a glass fiber mat, against the anchor base plate 23 are distanced.
  • the tension member 1 of the pressure pipe anchor Tension wire strands 2 is by means of the segment wedges 24 in Anchored core region 25 of the anchor base plate 23, the made of a metal alloy that can be melted at low temperature consists.
  • the anchor footplate has the shape a thick-walled steel can, the wall of which 23a the core area 25 in the sense of a pull ring encloses and the occurring plastic deformations of soft metal 25 among the high radial ones Reaction forces of the segment wedges 24 "catches" and limited to a permissible level.
  • the heating element required for the anchor base plate 23 is in the form of the axially arranged electrical Heating cartridge 26 shown, with the cable 27 in the protective tube 27a as power supply.
  • the anchor foot piece is with a cover 28 to the rear closed and gives over the pressure piece 21 and the Base plate 17 the anchor tensile force to the pressure pipe 4th or 5, the pressing body 7 and the base 8 further.
  • the cavities 30 of the anchor foot construction are said to a proven corrosion protection compound, for possible corrosive effects from the Non-ferrous metals of core area 25 in presence of water on the prestressing steel of the strands 2 reliably to prevent.
  • the anchor foot piece optionally made of solid steel 31 without fusible core area is with the Thermit fire set 32, this one with the electrical Ignition device 33 and the power supply 27 in the protective tube 27a.
  • the effect of the incendiary charge 32 can preferably be: the addition of a pyrotechnic blowing agent in the reaction mixture be reinforced to be a highly effective To produce "blow-out effect".
  • anchor foot piece 31 there are bores along the cone 24 channels 34 are provided for the anchoring wedges (in Figure 8 rotated by 90 ° in the image plane and in Figure 7 shown in dashed lines), which are the hot reaction gases of the incendiary device 32 lead to the strands 2 to selectively use this for the expansion of the tension member to weaken or sever.
  • anchoring wedges in Figure 8 rotated by 90 ° in the image plane and in Figure 7 shown in dashed lines
  • the function of the channels 34 can in the given case through the gap 35 between the wedge segments 24 reinforced or taken over entirely.

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)
  • Joining Of Building Structures In Genera (AREA)
  • Dowels (AREA)
  • Finger-Pressure Massage (AREA)
EP01111051A 2000-05-08 2001-05-08 Ancrage injecté récupérable Expired - Lifetime EP1154077B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04020952A EP1486617A1 (fr) 2000-05-08 2001-05-08 Ancrage injecté récupérable

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
DE10022273 2000-05-08
DE10022273 2000-05-08
DE10032591 2000-07-07
DE10032591 2000-07-07
DE10032712 2000-07-07
DE10032712 2000-07-07
DE10047655 2000-09-26
DE10047655 2000-09-26
DE10106387 2001-02-12
DE10106387 2001-02-12

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP04020952A Division EP1486617A1 (fr) 2000-05-08 2001-05-08 Ancrage injecté récupérable
EP04020952.0 Division-Into 2004-09-03

Publications (2)

Publication Number Publication Date
EP1154077A1 true EP1154077A1 (fr) 2001-11-14
EP1154077B1 EP1154077B1 (fr) 2010-08-04

Family

ID=27512374

Family Applications (2)

Application Number Title Priority Date Filing Date
EP01111051A Expired - Lifetime EP1154077B1 (fr) 2000-05-08 2001-05-08 Ancrage injecté récupérable
EP04020952A Withdrawn EP1486617A1 (fr) 2000-05-08 2001-05-08 Ancrage injecté récupérable

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP04020952A Withdrawn EP1486617A1 (fr) 2000-05-08 2001-05-08 Ancrage injecté récupérable

Country Status (3)

Country Link
EP (2) EP1154077B1 (fr)
AT (1) ATE476557T1 (fr)
DE (1) DE50115578D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103362124A (zh) * 2013-07-17 2013-10-23 重庆岩安科技有限公司 用于土木工程的可回收锚索
CN103898905A (zh) * 2014-04-24 2014-07-02 四川盛唐建设工程有限公司 复合高强度锚索
EP3336259A1 (fr) * 2016-12-16 2018-06-20 Stahlton AG Ancrage dans le sol et/ou dans la roche comprenant un tirant réutilisable
CN111997048A (zh) * 2020-07-03 2020-11-27 中北大学 一种多功能重复利用的可回收锚杆
CN115419076A (zh) * 2022-05-30 2022-12-02 中冶建工集团有限公司 深基坑高压旋喷可回收锚索支护施工方法
CN116220025A (zh) * 2022-04-07 2023-06-06 成都理工大学 一种可回收锚杆系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010004381U1 (de) 2010-03-30 2010-08-12 Dywidag-Systems International Gmbh Druckrohr sowie daraus hergestellter Erdanker
CN112459058A (zh) * 2020-12-07 2021-03-09 中建八局第四建设有限公司 一种梯次加压注浆锚杆及其施工方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2353652A1 (de) 1973-10-26 1975-05-07 Bauer Karl Kg Ausbaubarer verpressanker mit zerstoerbarem ankerfuss
DE2557978A1 (de) * 1974-12-24 1976-07-08 Stump Bohr Gmbh Anker zur verankerung von bauteilen im erdreich oder fels
GB2158482A (en) * 1984-03-19 1985-11-13 Dyckerhoff & Widmann Ag Device for separating the tension member of a prestressed pressure-grouted anchor by forming a predetermined breaking point
JPH04143312A (ja) 1990-10-04 1992-05-18 Nittoc Constr Co Ltd 除去アンカー工法
EP0545471A1 (fr) 1991-11-29 1993-06-09 Hollandsche Beton Groep N.V. Procédé pour fixer une ancre pour l'ancrage de murs de soutènement, de bâtiment, de rideaux, de palplanches, de murs de quais et similaires
EP0638689A1 (fr) * 1993-08-09 1995-02-15 Bouygues Procédé pour faciliter l'extraction de l'armature d'un tirant précontraint et tirant correspondant
JPH09256360A (ja) * 1996-03-25 1997-09-30 Sanshin Kensetsu Kogyo Kk 除去アンカー工法及び装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2353652A1 (de) 1973-10-26 1975-05-07 Bauer Karl Kg Ausbaubarer verpressanker mit zerstoerbarem ankerfuss
DE2557978A1 (de) * 1974-12-24 1976-07-08 Stump Bohr Gmbh Anker zur verankerung von bauteilen im erdreich oder fels
GB2158482A (en) * 1984-03-19 1985-11-13 Dyckerhoff & Widmann Ag Device for separating the tension member of a prestressed pressure-grouted anchor by forming a predetermined breaking point
JPH04143312A (ja) 1990-10-04 1992-05-18 Nittoc Constr Co Ltd 除去アンカー工法
EP0545471A1 (fr) 1991-11-29 1993-06-09 Hollandsche Beton Groep N.V. Procédé pour fixer une ancre pour l'ancrage de murs de soutènement, de bâtiment, de rideaux, de palplanches, de murs de quais et similaires
EP0638689A1 (fr) * 1993-08-09 1995-02-15 Bouygues Procédé pour faciliter l'extraction de l'armature d'un tirant précontraint et tirant correspondant
JPH09256360A (ja) * 1996-03-25 1997-09-30 Sanshin Kensetsu Kogyo Kk 除去アンカー工法及び装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 016, no. 422 (M - 1305) 4 September 1992 (1992-09-04) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 01 30 January 1998 (1998-01-30) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103362124A (zh) * 2013-07-17 2013-10-23 重庆岩安科技有限公司 用于土木工程的可回收锚索
CN103898905A (zh) * 2014-04-24 2014-07-02 四川盛唐建设工程有限公司 复合高强度锚索
EP3336259A1 (fr) * 2016-12-16 2018-06-20 Stahlton AG Ancrage dans le sol et/ou dans la roche comprenant un tirant réutilisable
CN111997048A (zh) * 2020-07-03 2020-11-27 中北大学 一种多功能重复利用的可回收锚杆
CN111997048B (zh) * 2020-07-03 2021-09-17 中北大学 一种多功能重复利用的可回收锚杆或锚索
CN116220025A (zh) * 2022-04-07 2023-06-06 成都理工大学 一种可回收锚杆系统
CN115419076A (zh) * 2022-05-30 2022-12-02 中冶建工集团有限公司 深基坑高压旋喷可回收锚索支护施工方法

Also Published As

Publication number Publication date
DE50115578D1 (de) 2010-09-16
ATE476557T1 (de) 2010-08-15
EP1154077B1 (fr) 2010-08-04
EP1486617A1 (fr) 2004-12-15

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