EP2808449A1 - Pile driven by drilling - Google Patents
Pile driven by drilling Download PDFInfo
- Publication number
- EP2808449A1 EP2808449A1 EP14001852.4A EP14001852A EP2808449A1 EP 2808449 A1 EP2808449 A1 EP 2808449A1 EP 14001852 A EP14001852 A EP 14001852A EP 2808449 A1 EP2808449 A1 EP 2808449A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bohrverpresspfahl
- external thread
- thread
- pile
- pile shaft
- 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
Links
- 238000005553 drilling Methods 0.000 title description 2
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 238000004873 anchoring Methods 0.000 claims abstract description 4
- 230000004323 axial length Effects 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 229910000746 Structural steel Inorganic materials 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 239000011440 grout Substances 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- POIUWJQBRNEFGX-XAMSXPGMSA-N cathelicidin Chemical compound C([C@@H](C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H]([C@@H](C)CC)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C(C)C)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CO)C(O)=O)NC(=O)[C@H](CC=1C=CC=CC=1)NC(=O)[C@H](CC(O)=O)NC(=O)CNC(=O)[C@H](CC(C)C)NC(=O)[C@@H](N)CC(C)C)C1=CC=CC=C1 POIUWJQBRNEFGX-XAMSXPGMSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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
- E02D5/22—Piles
- E02D5/54—Piles with prefabricated supports or anchoring parts; Anchoring piles
Definitions
- the invention relates to a Bohrverpresspfahl with a pile shaft made of a round steel and an anchor head, which has an external thread on which a head plate can be fastened by means of a nut, for back anchoring, in particular of sheet piles.
- Pipe anchors which can be used as anchoring piles of sheet piling or similar structures, but also as soil nails, for excavation, embankment stabilization, foundations for masts and noise barriers and sheet pile anchors for Kaibefest Trenten.
- Basic steel anchors consist of horizontally installed tension members, which open into an anchor wall or an anchor panel. The load of such anchor can be limited by the mobilizable earth resistance of the anchor plate.
- Ground anchors consist of a steel tension member and a grout body.
- the tensile forces are either continuously introduced from the Stahlzugglied in the grout or they are introduced via a pressure tube, which incorporates into the grout.
- the power transmission in the soil takes place in both systems above a skin friction.
- the steel tension member must be able to deform freely in a cladding tube, so that the ground anchors can be biased. As Stahlzugglieder threaded rods or strands into consideration.
- Grout anchors are usually produced by drilling with or without irrigation.
- Bohrverpresspfahl according to claim 1, which according to the invention has a pile shaft which is provided over its entire axial length with a rolled external thread having a greater pitch than the external thread in the anchor head.
- the edges formed during rolling of the external thread are rounded off.
- the composite stress is improved in the grout and thus achieved a more uniform cracking. This makes it possible to comply with the requirement of crack width restriction even with larger loads.
- the rounding of the resulting during rolling of the external thread edges in the region of the maximum elevation s a radius of 2 mm to 3 mm, preferably 2.5 mm.
- the Bohrverpresspfahl preferably has threaded valleys with a rounding, which have a radius of 10 mm to 12 mm, preferably 11 mm.
- an area is provided in each case between said rounded elevations and the rounded valleys of the external thread, which extends linearly in cross section over a length of 2 mm to 3 mm, preferably 2.8 mm.
- such a solid rod according to the invention with said thread does not require additional corrosion protection, which is otherwise required in order to avoid cracking of the concrete.
- with larger diameters of the full profile with said thread and higher payloads can be achieved.
- the external thread preferably has a thread depth of 2 mm to 10 mm.
- the pile shaft and the anchor head are further preferably made of a structural steel with yield strengths of S 355 N / mm 2 to S 500 N / mm 2 .
- the Bohrverpresspfahl is designed for connection to a steel sheet pile and this has a load distribution plate with a slanted hole, the anchor head is surrounded in the region of this bore by a tilt compensation tube on which a dome plate is supported as an abutment for a dome nut serves, which is screwed onto the anchor head male thread.
- the cap nut and the protruding end of the anchor head may preferably be covered by an anchor cap.
- a polyethylene high-pressure pipe enclosing the pile shaft is provided in the lower area, d. H. in the area of the pile shaft.
- Bohrverpresspfahl has a pile shaft 10, which consists of a round steel and has an anchor head 11 with an external thread.
- the pile shaft 10 also has an external thread which extends over its entire axial length and which has been produced by rolling (thread rolling).
- This external thread of the pile shaft has a greater pitch than that External thread of the drill head.
- the thread pitch s is in the range of 15 mm to 25 mm, in particular 20 mm.
- the thread surveys and the thread valleys are each rounded, the radius r of the surveys between 2 mm to 3 mm, preferably 2.5 mm.
- the radius R of the valleys is between 10 mm to 12 mm, preferably 11 mm.
- Between the elevations and the thread valleys is a section a, which has a cross-section of a length of 2 mm to 3 mm, in the present example of 2.8 mm.
- the thread depth t is between 2 mm to 10 mm, in the present case 4 mm, depending on the selected nominal diameter of the pile shaft.
- one or more (in the selected embodiment, two) spacers 12 are secured by means of clamps 13.
- a polyethylene high-pressure pipe 14 is provided, which is covered by shrink tubing 15.
- the anchor head 11 has a commercial inch thread on which a nut can be attached.
- Fig. 3 shows a Bohrverpresspfahl which is connected to a sheet pile wall 20.
- a load distribution plate 21 is fastened to a belt 23 by means of a belt pin 22.
- a corresponding load distribution plate 24 and a nut 25 can be seen on one side of the sheet pile wall.
- a high pressure polyethylene 14 is passed, between which and a steel transfer pipe 27 sealing blades 28 are arranged.
- a dome plate 16 is applied, which is fixed by means of a dome nut 17.
- the cap nut and the upper part of the anchor head 11 are covered by an anchor cap 18; which consists of a plastic corrosion protection compound.
- an anchor cap 18 is provided, in which engages the anchor head.
- Bohrverpresspfahl can of course be used as a pile head connection in a concrete block in which the anchor head is anchored in a concrete block.
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)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
Die Erfindung betrifft einen Bohrverpresspfahl mit einem Pfahlschaft aus einem Rundstahl und einem Ankerkopf, der ein Außengewinde aufweist, auf dem eine Kopfplatte mittels einer Mutter befestigbar ist, zur Rückverankerung, insbesondere von Spundwänden. Um eine sichere Befestigung des Pfahlschaftes im Boden zu ermöglichen, wird erfindungsgemäß vorgeschlagen, dass der Pfahischaft über seine gesamte axiale Länge mit einem gerollten Außengewinde versehen ist, dass eine größere Steigung als das Außengewinde im Bohrkopf besitzt, vorzugsweise eine Gewindesteigung von 15 mm bis 25 mm.The invention relates to a Bohrverpresspfahl with a pile shaft made of a round steel and an anchor head, which has an external thread on which a head plate can be fastened by means of a nut, for back anchoring, in particular of sheet piles. In order to enable a secure attachment of the pile shaft in the ground, the invention proposes that the pivot shaft is provided over its entire axial length with a rolled external thread that has a greater pitch than the external thread in the drill head, preferably a thread pitch of 15 mm to 25 mm ,
Description
Die Erfindung betrifft einen Bohrverpresspfahl mit einem Pfahlschaft aus einem Rundstahl und einem Ankerkopf, der ein Außengewinde aufweist, auf dem eine Kopfplatte mittels einer Mutter befestigbar ist, zur Rückverankerung, insbesondere von Spundwänden.The invention relates to a Bohrverpresspfahl with a pile shaft made of a round steel and an anchor head, which has an external thread on which a head plate can be fastened by means of a nut, for back anchoring, in particular of sheet piles.
Verpresspfähle der genannten Art sind Rohranker, die als Verankerungspfähle von Spundwänden oder ähnlichen Bauwerken, aber auch als Bodennägel, zur Baugrubensicherung, Böschungsstabilisierung, Gründung für Masten und Lärmschutzwände sowie Spundwandverankerungen für Kaibefestigungen eingesetzt werden können.Pressing piles of the type mentioned are pipe anchors, which can be used as anchoring piles of sheet piling or similar structures, but also as soil nails, for excavation, embankment stabilization, foundations for masts and noise barriers and sheet pile anchors for Kaibefestigungen.
Je nach Konstruktionsart wird zwischen Mikropfählen und Grundstahlankern unterschieden. Grundstahlanker bestehen aus horizontal verlegten Zuggliedern, die in einer Ankerwand oder einer Ankertafel münden. Die Traglast solcher Anker kann durch den mobilisierbaren Erdwiderstand von der Ankerplatte begrenzt werden.Depending on the type of construction, a distinction is made between micropiles and basic steel anchors. Basic steel anchors consist of horizontally installed tension members, which open into an anchor wall or an anchor panel. The load of such anchor can be limited by the mobilizable earth resistance of the anchor plate.
Verpressanker bestehen aus einem Stahlzugglied und einem Verpresskörper. Die Zugkräfte werden vom Stahlzugglied entweder kontinuierlich in den Verpresskörper eingetragen oder sie werden über ein Druckrohr, welches in den Verpresskörper einbindet, eingeleitet. Die Kraftübertragung in den Boden findet bei beiden genannten Systemen über eine Mantelreibung statt. Das Stahlzugglied muss sich in einem Hüllrohr frei verformen können, damit die Verpressanker vorgespannt werden können. Als Stahlzugglieder kommen Gewindestangen oder Litzen in Betracht.Ground anchors consist of a steel tension member and a grout body. The tensile forces are either continuously introduced from the Stahlzugglied in the grout or they are introduced via a pressure tube, which incorporates into the grout. The power transmission in the soil takes place in both systems above a skin friction. The steel tension member must be able to deform freely in a cladding tube, so that the ground anchors can be biased. As Stahlzugglieder threaded rods or strands into consideration.
Verpressanker werden üblicherweise im Bohrverfahren mit oder ohne Spülung hergestellt.Grout anchors are usually produced by drilling with or without irrigation.
Es ist Aufgabe der vorliegenden Erfindung einen Bohrverpresspfahl der eingangs genannten Art anzugeben, der eine sichere Befestigung des Pfahlschaftes im Boden ermöglicht.It is an object of the present invention to provide a Bohrverpresspfahl the aforementioned type which allows a secure attachment of the pile shaft in the ground.
Diese Aufgabe wird durch einen Bohrverpresspfahl nach Anspruch 1 gelöst, der erfindungsgemäß einen Pfahlschaft besitzt, der über seine gesamte axiale Länge mit einem gerollten Außengewinde versehen ist, das eine größere Steigung als das Außengewinde im Ankerkopf besitzt.This object is achieved by a Bohrverpresspfahl according to claim 1, which according to the invention has a pile shaft which is provided over its entire axial length with a rolled external thread having a greater pitch than the external thread in the anchor head.
Vorzugsweise werden die beim Rollen des Außengewindes entstandenen Kanten abgerundet. Dadurch wird die Verbundspannung im Verpresskörper verbessert und damit einhergehend eine gleichmäßigere Rissbildung erzielt. Hiermit gelingt es auch bei größeren Lasten die Forderung der Rissbreitenbeschränkung einzuhalten.Preferably, the edges formed during rolling of the external thread are rounded off. As a result, the composite stress is improved in the grout and thus achieved a more uniform cracking. This makes it possible to comply with the requirement of crack width restriction even with larger loads.
Nach einer weiteren Ausgestaltung der Erfindung weist die Abrundung der beim Rollen des Außengewindes entstehenden Kanten im Bereich der maximalen Erhebungen einen Radius von 2 mm bis 3 mm, vorzugswiese 2,5 mm auf.According to a further embodiment of the invention, the rounding of the resulting during rolling of the external thread edges in the region of the maximum elevations a radius of 2 mm to 3 mm, preferably 2.5 mm.
Zudem besitzt der Bohrverpresspfahl vorzugsweise Gewindetäler mit einer Rundung, die einen Radius von 10 mm bis 12 mm, vorzugsweise 11 mm besitzen. Insbesondere ist zwischen den genannten gerundeten Erhebungen und den gerundeten Tälern des Außengewindes jeweils ein Bereich vorgesehen, der im Querschnitt über eine Länge von 2 mm bis 3 mm, vorzugsweise 2,8 mm linear verläuft. Ein solcher erfindungsgemäßer Vollstab mit dem genannten Gewinde erfordert insbesondere keinen zusätzlichen Korrosionsschutz, der ansonsten erforderlich ist um ein Reißen des Betons zu vermeiden. Zudem sind bei größeren Durchmessern des Vollprofils mit dem genannten Gewinde auch höhere Traglasten erreichbar.In addition, the Bohrverpresspfahl preferably has threaded valleys with a rounding, which have a radius of 10 mm to 12 mm, preferably 11 mm. In particular, an area is provided in each case between said rounded elevations and the rounded valleys of the external thread, which extends linearly in cross section over a length of 2 mm to 3 mm, preferably 2.8 mm. In particular, such a solid rod according to the invention with said thread does not require additional corrosion protection, which is otherwise required in order to avoid cracking of the concrete. In addition, with larger diameters of the full profile with said thread and higher payloads can be achieved.
Vorzugsweise weist das Außengewinde je nach Nennmaßdurchmesser des Pfahlschaftes eine Gewindetiefe von 2 mm bis 10 mm auf. Der Pfahlschaft und der Ankerkopf sind weiterhin vorzugsweise aus einem Baustahl mit Streckgrenzen von S 355 N/mm2 bis S 500 N/mm2 gefertigt.Depending on the nominal diameter of the pole shaft, the external thread preferably has a thread depth of 2 mm to 10 mm. The pile shaft and the anchor head are further preferably made of a structural steel with yield strengths of S 355 N / mm 2 to S 500 N / mm 2 .
Die vorgenannten Maßnahmen ermöglichen Einsatzbereiche als Rückverankerungen im Hafen- und Spezialtiefbau, als Gründungspfähle, die auf Zug und Druck beansprucht werden sowie Rückverankerungen im Wasserstraßenausbau. Besondere Vorteile sind hohe innere Tragfähigkeiten bis 3.865 kN, eine geringe Verformung, große Robustheit sowie hohe Tragreserven. Ein Einsatz ist sowohl für die bindigen als auch rolligen Böden möglich.The aforementioned measures allow applications as anchorages in port and special civil engineering, as foundation piles, which claims to train and pressure as well as re-anchorages in the waterway development. Special advantages are high internal load capacities of up to 3,865 kN, low deformation, high robustness and high bearing capacities. An application is possible for both cohesive and mobile soils.
In einer besonderen Ausführungsform ist der Bohrverpresspfahl zum Anschluss an eine Stahlspundwand ausgebildet und besitzt hierzu eine Lastverteilungsplatte mit einer schräg liegenden Bohrung, wobei der Ankerkopf im Bereich dieser Bohrung von einem Neigungsausgleichsrohr umgeben ist, auf dem sich eine Kalottenplatte abstützt, die als Widerlager für eine Kalottenmutter dient, die auf dem AnkerkopfAußengewinde aufgeschraubt ist. Die Kalottenmutter und das überstehende Ende des Ankerkopfes können vorzugsweise von einer Ankerkappe abgedeckt werden.In a particular embodiment, the Bohrverpresspfahl is designed for connection to a steel sheet pile and this has a load distribution plate with a slanted hole, the anchor head is surrounded in the region of this bore by a tilt compensation tube on which a dome plate is supported as an abutment for a dome nut serves, which is screwed onto the anchor head male thread. The cap nut and the protruding end of the anchor head may preferably be covered by an anchor cap.
Im unteren Bereich, d. h. im Bereich des Pfahlschaftes ist ein den Pfahlschaft umhüllendes Polyethylen-Hochdruckrohr vorgesehen.In the lower area, d. H. in the area of the pile shaft, a polyethylene high-pressure pipe enclosing the pile shaft is provided.
Weitere Vorteile und Ausbildungen gemäß der vorliegenden Erfindung werden im Folgenden anhand der Zeichnungen erläutert. Es zeigen:
- Fig. 1
- eine Längsansicht eines Bohrverpresspfahls,
- Fig. 2
- eine Detailansicht des Gewindes des Pfahlschaftes und
- Fig. 3
- eine schematische Ansicht eines Bohrverpresspfahls, der an einer Spundwand abgestützt ist.
- Fig. 1
- a longitudinal view of a Bohrverpresspfahls,
- Fig. 2
- a detail view of the thread of the pile shaft and
- Fig. 3
- a schematic view of a Bohrverpresspfahls, which is supported on a sheet pile wall.
Der in
Der Pfahlschaft 10 besitzt ebenfalls ein Außengewinde, das sich über seine gesamte axiale Länge erstreckt und das durch Walzen (Gewinderollen) hergestellt worden ist. Dieses Außengewinde des Pfahlschaftes besitzt eine größere Steigung als das Außengewinde des Bohrkopfes. Vorzugsweise liegt die Gewindesteigung s im Bereich von 15 mm bis 25 mm, insbesondere bei 20 mm. Wie aus der Darstellung in
Die Gewindetiefe t liegt je nach gewähltem Nennmaßdurchmesser des Pfahlschaftes zwischen 2 mm bis 10 mm, im vorliegenden Fall bei 4 mm. Auf dem Pfahlschaft 10 sind ein oder mehrere (im gewählten Ausführungsbeispiel zwei) Abstandshalter 12 mittels Schellen 13 befestigt. Am oberen Ende des Bohrverpresspfahls im Bereich des Übergangs von dem Ankerkopf 11 und dem Pfahlschaft 10 ist ein Polyethylen-Hochdruckrohr 14 vorgesehen, das von Schrumpfschläuchen 15 überzogen ist. Der Ankerkopf 11 besitzt ein handelsübliches Zollgewinde, auf dem eine Mutter befestigt werden kann.The thread depth t is between 2 mm to 10 mm, in the present case 4 mm, depending on the selected nominal diameter of the pile shaft. On the
Der Bohrverpresspfahl lässt sich selbstverständlich auch als Pfahlkopfanschluss in einem Betonblock benutzen, bei dem der Ankerkopf in einem Betonblock verankert ist.The Bohrverpresspfahl can of course be used as a pile head connection in a concrete block in which the anchor head is anchored in a concrete block.
Claims (10)
dadurch gekennzeichnet, dass
der Pfahlschaft (10) über seine gesamte axiale Länge mit einem gerollten Außengewinde versehen ist, das eine größere Steigung als das Außengewinde im Bohrkopf (11) besitzt, vorzugsweise eine Gewindesteigung (s von 15-25 mm), weiterhin vorzugsweise von 20 mm.Boring pile with a pile shaft (10) made of a round steel and an anchor head (11) having an external thread on which a head plate (16) by means of a nut (17) can be fastened, for anchoring back, in particular sheet pile walls (20)
characterized in that
the pile shaft (10) is provided over its entire axial length with a rolled external thread having a greater pitch than the external thread in the drill head (11), preferably a thread pitch (s of 15-25 mm), further preferably 20 mm.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202013004921.9U DE202013004921U1 (en) | 2013-05-29 | 2013-05-29 | Bohrverpresspfahl |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2808449A1 true EP2808449A1 (en) | 2014-12-03 |
EP2808449B1 EP2808449B1 (en) | 2017-10-18 |
Family
ID=50842010
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14001852.4A Active EP2808449B1 (en) | 2013-05-29 | 2014-05-28 | Pile driven by drilling |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2808449B1 (en) |
DE (1) | DE202013004921U1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108149681A (en) * | 2017-12-15 | 2018-06-12 | 上海建工五建集团有限公司 | Backfill rotary digging bored concrete pile Assembled steel guard cylinder and its construction method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1484449A1 (en) * | 1964-08-18 | 1969-10-02 | Deutsche Erdoel Ag | Method of fastening anchors in the ground |
DE1910556A1 (en) * | 1969-03-01 | 1970-09-10 | Holzmann Philipp Ag | Process for the production of foundation piles from in-situ concrete with extensions of the pile shaft and the pile base, as well as internal formwork for carrying out the process |
-
2013
- 2013-05-29 DE DE202013004921.9U patent/DE202013004921U1/en not_active Expired - Lifetime
-
2014
- 2014-05-28 EP EP14001852.4A patent/EP2808449B1/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1484449A1 (en) * | 1964-08-18 | 1969-10-02 | Deutsche Erdoel Ag | Method of fastening anchors in the ground |
DE1910556A1 (en) * | 1969-03-01 | 1970-09-10 | Holzmann Philipp Ag | Process for the production of foundation piles from in-situ concrete with extensions of the pile shaft and the pile base, as well as internal formwork for carrying out the process |
Also Published As
Publication number | Publication date |
---|---|
EP2808449B1 (en) | 2017-10-18 |
DE202013004921U1 (en) | 2014-06-03 |
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