EP3702534B1 - Dispositif d'essai pour ancres en forme de bâton, en particulier sur des sols meubles - Google Patents

Dispositif d'essai pour ancres en forme de bâton, en particulier sur des sols meubles Download PDF

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Publication number
EP3702534B1
EP3702534B1 EP20159378.7A EP20159378A EP3702534B1 EP 3702534 B1 EP3702534 B1 EP 3702534B1 EP 20159378 A EP20159378 A EP 20159378A EP 3702534 B1 EP3702534 B1 EP 3702534B1
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EP
European Patent Office
Prior art keywords
testing device
test
bar anchor
extension
impact weight
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.)
Active
Application number
EP20159378.7A
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German (de)
English (en)
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EP3702534A1 (fr
Inventor
Ulrich KÖNIG
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.)
Pulse Engineering GmbH
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Pulse Engineering GmbH
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Publication date
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Publication of EP3702534A1 publication Critical patent/EP3702534A1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00—Testing foundations or foundation structures
    • 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

  • the invention relates to a test device according to claim 1 for rod anchors and strand anchors, which are installed in particular on loose soil.
  • test device is from JP2011059027 A known.
  • test devices are from the JPH10274576A and the JP 2016 079599 A known, in which a test weight is accelerated by gravity.
  • Rockfall and avalanche protection barriers are mainly built in alpine areas. The erection, foundation, maintenance and testing of these structures is therefore complex and demanding. It is also shown that especially the dynamic loading of these structures and subsequently the dynamic loading of the foundations, especially on loose soil, cannot be tested satisfactorily with static anchor tests.
  • test device for installed rod anchors which enables dynamic testing regardless of the strength of the subsoil, and which is preferably less complex, both technically and economically, than known test devices.
  • the test device according to the invention for rod anchors and strand anchors is in principle suitable for any arrangement of the rod anchors on a particular subsoil, but is particularly suitable for a rod anchor arrangement in soft ground (loose soil) and has a rod anchor extension for this, which can be a metallic extension rod, for example, whereby this rod anchor extension is temporarily connected to the rod anchor while the rod anchor is being tested.
  • the testing device has an impact weight, which can also be referred to as an impact weight.
  • This impact weight is movably guided on the rod anchor extension for the purpose of performing the test.
  • test device has an acceleration device with which it is possible to accelerate the impact weight in the direction of a stop which is attached to the rod anchor extension.
  • test device With this test device it is possible to carry out a test method that is independent of the soft subsoil (loose soil) or does not require the associated expenses, such as in particular heavy supporting structures or foundations.
  • test device according to the invention it is possible with the test device according to the invention to implement a dynamic application of force in the course of the anchor test in order to also be able to take into account the predominantly dynamic loading of these structures in practical use.
  • test device according to the invention has the advantage that, in contrast to the test devices known from the prior art, the required Energy to generate the test forces does not have to be generated hydraulically, but that due to the structure of the test device according to the invention, in particular pneumatic, mechanical (e.g. with steel springs) or chemical acceleration devices, such as propellant charges based on combustion, can be used.
  • a rod extension is temporarily fixed on an anchor head of the rod anchor protruding from the subsoil, that is to say for the purpose of carrying out the test.
  • an extension of about 1.5 m can be achieved here.
  • this is only to be understood as an example, since the dimensions of the rod anchor extension depend on the respective installation conditions and other influencing factors and can be adapted accordingly.
  • the impact weight which is movably guided on the rod anchor extension, can be accelerated by means of the acceleration device in the direction of a stop attached to the rod anchor extension, which when the impact weight hits the stop leads to forces acting on the rod anchor, which can be recorded and evaluated, in particular a dynamic one
  • the interpretation of which enables conclusions to be drawn about the quality and load-bearing capacity of the anchorage in the subsoil.
  • a sleeve can be provided as an attachment option for the rod anchor extension on the rod anchor, which in principle can be connected to the anchor head and the rod anchor extension using any suitable fastening device, such as screw connections, clamp connections, adhesive connections, welded connections or the like, in order to achieve the desired temporary connection of the rod anchor extension to accomplish at the rod anchor.
  • any suitable fastening device such as screw connections, clamp connections, adhesive connections, welded connections or the like.
  • the stop to which the impact weight is accelerated can, for example, be a nut screwed onto the rod anchor extension, but it is also possible here to provide other types of fastening for the stop, such as a welded connection or a clamp connection.
  • the arrangement of the impact weight, the sliding tube and the stop can be arranged in a cladding tube in order to in particular to prevent contamination of the components arranged in the cladding tube, which could negatively affect the measurement.
  • one or more acceleration sensors on the sleeve and, in a further particularly preferred embodiment, one or more strain gauges additionally or alternatively. If one or more acceleration sensors are provided, it is possible to evaluate the test by deriving the acceleration that occurs twice to make a statement about the movement or the deformation of the rod anchor.
  • a particularly simple embodiment according to the invention for the acceleration device is a compressed air cylinder, since it is easy to transport and assemble and can be connected in a simple manner, for example to the jacket tube, via an especially flexible connection hose, in order to bring compressed air into the jacket tube to be able to initiate for the purpose of accelerating the impact weight.
  • a chemical acceleration device for example based on combustion, is also conceivable in order to be able to apply the required acceleration forces.
  • a method for dynamic anchor testing of rod anchors, especially in loose soil which comprises the following method steps: In a first process step, the rod anchor is extended by a test section, the length and arrangement of which can be adapted to the respective assembly of the rod anchor and its structure.
  • an impact weight is attached to it and a stop is attached to one of the ends of the test section.
  • the impact weight is accelerated in the direction of the stop in order to apply dynamically acting loads on the test section and after the impact weight has hit the stop, the loads acting on the rod anchor when the impact weight hits are determined in order to determine the effects of these dynamic loads, which correspond to the loads that also occur during operation of the rod anchor or the structure in which the rod anchor is integrated.
  • the test device 1 shown in the figure serves to check the arrangement of a rod anchor 2 in a subsoil, in particular in the form of loose soil LB.
  • the rod anchor 2 has an anchor head 7 which protrudes from the subsoil, in particular the loose soil LB, so that in the particularly preferred embodiment shown in the figure it is possible to temporarily attach a rod extension 3 to the anchor head 7 via a sleeve 8.
  • temporary means that the rod extension is only connected to the anchor head 7 of the rod anchor 2 while the test is being carried out and the test device 1 can be separated again from the anchor head 7 and thus from the rod anchor 2 after the test has been carried out.
  • the test device 1 has a so-called impact weight 4 that is movably guided on the rod anchor extension 3.
  • the test device 1 has an acceleration device 15 with which it is possible to accelerate the impact weight 4 in the direction R onto a stop 6 fastened on the rod anchor extension 3.
  • the impact weight 4 is arranged on a sliding tube 9, which in turn is arranged on the rod anchor extension 3.
  • stop 6 it is possible, as shown in the figure, to design the stop 6 as a nut screwed onto the free end of the rod anchor extension 3, but this is only one option. Of course, it would also be possible to weld the stop 6 onto the corresponding end of the rod anchor extension 3 or to fasten it in some other way, whereby it would only have to be ensured that the stop 6 can withstand the impact of the impact weight 4.
  • a casing tube 10 is preferably provided in the embodiment shown in the figure, in which the impact weight, the sliding tube and the stop 6 as well as the rod extension 3 are arranged.
  • a cladding tube 10 above all has the advantage that contamination of the aforementioned components, which are arranged within the cladding tube 10, can be avoided, which is particularly advantageous in that such contamination could falsify the test result.
  • a threaded nut 12 is also screwed onto an end region 11 arranged outside of the cladding tube 10 and a threaded nut 16 is screwed onto an opposite end section 11B adjacent to the sleeve 8, each of which protrudes from the cladding tube 10.
  • the stop 6 could also be omitted, since in this case the impact weight 4 could also develop its effect if it is in shape on the end area adjacent to the nut 12 an end wall 17 of the cladding tube 10 would impinge.
  • the impact weight 4 on the stop 6 it is preferably provided in the embodiment shown in the figure to have at least one, preferably a plurality, of acceleration sensors 13 and at least one, preferably a plurality of strain gauges 14 to arrange the sleeve 8 in order to be able to determine according to the deformations occurring via appropriate evaluation methods, how the quality of the fixation or load-bearing capacity of the rod anchor 2 in the subsoil, in particular loose soil LB, is to be assessed.

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)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Piles And Underground Anchors (AREA)

Claims (9)

  1. Dispositif d'essai (1) pour ancres en barre (2), en particulier dans des sols meubles (LB),
    - avec un prolongement d'ancre en barre (3), qui est relié de manière temporaire à l'ancre en barre (2) ;
    - avec un poids d'impact (4), qui est guidé de manière mobile sur le prolongement d'ancre en barre (3), et
    - avec un système d'accélération (5) pour accélérer le poids d'impact (4) en direction (R) d'une butée (6) fixée sur une extrémité libre du prolongement d'ancre en barre (3), caractérisé en ce
    - que le système d'accélération (5) est réalisé en tant que bouteille d'air comprimé (15).
  2. Dispositif d'essai selon la revendication 1, caractérisé en ce que le prolongement d'ancre en barre (3) est relié à l'ancre en barre (2) par l'intermédiaire d'un manchon (8) fixé de manière temporaire sur une tête d'ancre (7) de l'ancre en barre (2).
  3. Dispositif d'essai selon la revendication 1 ou 2, caractérisé en ce que le poids d'impact (4) est disposé sur un tube coulissant (9) qui est disposé sur le prolongement d'ancre en barre (3).
  4. Dispositif d'essai selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la butée (6) est réalisée en tant qu'écrou vissé sur le prolongement d'ancre en barre (3).
  5. Dispositif d'essai selon la revendication 3 ou 4, caractérisé en ce que le poids d'impact (4), le tube coulissant (9) et la butée (6) sont disposés dans un tube de gainage (10).
  6. Dispositif d'essai selon la revendication 5, caractérisé en ce qu'une zone d'extrémité (11A) du prolongement d'ancre en barre (3) est serrée sur le tube de gainage (10) au moyen d'un écrou fileté (12).
  7. Dispositif d'essai selon l'une quelconque des revendications 2 à 6, caractérisé en ce que le manchon (8) présente un capteur d'accélération (13).
  8. Dispositif d'essai selon l'une quelconque des revendications 2 à 7, caractérisé en ce que le manchon (8) présente une jauge de contrainte (14).
  9. Dispositif d'essai selon l'une quelconque des revendications 5 à 8, caractérisé en ce qu'un système de fixation (16) est disposé, en particulier sous la forme d'un écrou fileté, de manière adjacente par rapport au manchon (8) sur le prolongement d'ancre en barre (3) et repose sur le tube de gainage (10).
EP20159378.7A 2019-02-26 2020-02-25 Dispositif d'essai pour ancres en forme de bâton, en particulier sur des sols meubles Active EP3702534B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019202561.7A DE102019202561A1 (de) 2019-02-26 2019-02-26 Prüfvorrichtung für stabanker, insbesondere auf lockerboden

Publications (2)

Publication Number Publication Date
EP3702534A1 EP3702534A1 (fr) 2020-09-02
EP3702534B1 true EP3702534B1 (fr) 2021-09-01

Family

ID=69740171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20159378.7A Active EP3702534B1 (fr) 2019-02-26 2020-02-25 Dispositif d'essai pour ancres en forme de bâton, en particulier sur des sols meubles

Country Status (2)

Country Link
EP (1) EP3702534B1 (fr)
DE (1) DE102019202561A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10274576A (ja) * 1997-03-31 1998-10-13 Hazama Gumi Ltd 載荷試験装置及び載荷試験方法
JP4098145B2 (ja) * 2003-04-17 2008-06-11 学校法人東京電機大学 杭の急速載荷試験装置
JP2011059027A (ja) * 2009-09-14 2011-03-24 System Keisoku Kk 載荷装置
JP6412766B2 (ja) * 2014-10-14 2018-10-24 大裕株式会社 載荷試験装置ユニット、崩落防止パイプ及び載荷試験方法

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Publication number Publication date
DE102019202561A1 (de) 2020-08-27
EP3702534A1 (fr) 2020-09-02

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