EP2927377B1 - Procédé et agencement de nettoyage d'un élément de fondation en béton - Google Patents

Procédé et agencement de nettoyage d'un élément de fondation en béton Download PDF

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Publication number
EP2927377B1
EP2927377B1 EP14163361.0A EP14163361A EP2927377B1 EP 2927377 B1 EP2927377 B1 EP 2927377B1 EP 14163361 A EP14163361 A EP 14163361A EP 2927377 B1 EP2927377 B1 EP 2927377B1
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EP
European Patent Office
Prior art keywords
defect
line
foundation element
foundation
filling medium
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.)
Not-in-force
Application number
EP14163361.0A
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German (de)
English (en)
Other versions
EP2927377A1 (fr
Inventor
Lars Hümmler
Petra Peter
Wolfgang Dr.-Ing. Schwarz
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.)
Bauer Spezialtiefbau GmbH
Original Assignee
Bauer Spezialtiefbau GmbH
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Publication date
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Priority to EP14163361.0A priority Critical patent/EP2927377B1/fr
Publication of EP2927377A1 publication Critical patent/EP2927377A1/fr
Application granted granted Critical
Publication of EP2927377B1 publication Critical patent/EP2927377B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D37/00—Repair of damaged foundations or foundation structures

Definitions

  • the invention relates to a method and an arrangement for rehabilitating a foundation element made of concrete.
  • Such foundation elements are created for example for the foundation of structures in the ground or for Baugrubenumsch.
  • a typical foundation element is a bored pile which is formed by creating a bore in the soil by means of a boring tool. When retracting the drilling tool from the well this can be filled with concrete material.
  • defects in the concrete structure due to unwanted soil inclusions during the concreting process. Such defects can be detected by measuring devices, such as by ultrasonic measurement, and can affect a secure foundation of a building. When defects are found, it is therefore often necessary to rehabilitate the foundation element.
  • Another known remediation option is to introduce holes in the finished foundation element up to the defect and to rehabilitate the defect by injections.
  • drilling the concrete structure of the foundation element impaired. This can lead to further damage to the concrete structure, in particular to cracks.
  • the invention has for its object to provide a method and an arrangement for the rehabilitation of foundation elements, with which even deeper foundation elements can be renovated efficiently.
  • the method according to the invention is characterized in that, when forming the foundation element, at least one conduit is provided in the foundation element is that the at least one line is opened in the area of a defect to be rehabilitated in the foundation element, wherein access to the defect is created, and that a hardening filling medium is introduced into the defect.
  • a basic idea of the invention is to provide access to remediation tools in the foundation element already when the foundation element is being created. This can be done in particular by a pipe or a Hose for forming the conduit during concreting of the foundation element is provided in this.
  • the line is preferably closed at the bottom. In particular, with larger foundation elements and multiple lines can be used, which are distributed over the cross section.
  • the line extends to the upper end of the foundation element. If there is a defect in the foundation element, the existing line in the area of the defect can then be opened via a cutting device, so that access to the defect is formed. The defect can then be remedied and initiated by introducing a hardening filling medium.
  • a preferred development of the invention consists in that harmful material is flushed out of the defect by the filling medium and removed from the foundation element.
  • soil material from the borehole wall for example, reaches the drilling area before the borehole is filled up.
  • This undesirable soil material may form a defect in concreting in the foundation member.
  • this harmful material can first be flushed out of the defect and transported away via the conduit device from the foundation element. After removal of the harmful material, the hardening filling material can fill in the defect and thus form a homogeneous, firm structure in the foundation element.
  • the rinsing out of the harmful material can basically take place via the same conduit, via which the curing filling medium is also introduced.
  • the filling medium can be introduced via a lance-shaped feeding device, which extends along the supply line, while the harmful material in the remaining annular space between the lancet-shaped feed device and the supply line is recycled.
  • At least one feed line and at least one lead to be provided, between which the defect lies in the foundation element, that the at least one lead and the at least one lead be opened in the region of the defect, wherein a passage through the defect is created by the supply line to the derivative, and that the at least one feed line, the filling medium to the defect and the harmful material from the defect are passed over the at least one derivation.
  • This embodiment is particularly suitable for larger or crack-like defects that allow a directional flow. In this way, even larger defects can be reliably repaired.
  • a pipe is inserted into the foundation element.
  • one or more pipes made of metal or plastic may be attached to the reinforcing cage, which is used after filling the Aushubloches with the concrete material in the still soft concrete material. In this way, one or more lines can be created efficiently.
  • the pipes are not only used for renovation but also for other purposes.
  • So can be used as pipes steel pipes, which are used for example to carry out a so-called CHUM method (Crosshole Ultrasonic Measurement method). With this measurement method, the structure and defects in the foundation element can be determined.
  • the remediation process according to the invention can be used on a wide variety of foundation elements. It is particularly preferred that the foundation element is formed as a bored pile or a Fräswandpanel.
  • the Fräswandpanel may be provided about to form a slot or sealing wall.
  • the preparation of the foundation element in a concrete mixing process in which also soil material is used for producing the concrete material for the foundation element there may be an increased risk of flaw formation. Thus, even with such foundation elements fast and reliable renovations can be performed.
  • a further aspect of the method according to the invention is that a high-pressure lance is introduced into the line for opening the line or that a cutting medium is supplied under high pressure via the high-pressure lance, which cuts through a wall of the line.
  • Such high-pressure lances can be used reliably even at greater depths.
  • any fluid can be used. It is particularly preferred according to the invention that water or the filling medium is used as the cutting medium.
  • a suitable curable suspension can in principle be injected into the defect depending on the application. In certain cases, this may be a plastic resin. It is preferred according to the invention that a cement suspension is used as filling medium.
  • the cement suspension is advantageously adjusted to the concrete structure of the foundation element in such a way that, after the cement suspension has hardened, a particularly homogeneous structure is provided over the repaired defect. In this case, a certain amount of harmful material remain as a filler, which is encircled by the cement suspension and integrated.
  • a measuring device for detecting the defect is used in the line.
  • the measuring device is a non-destructive measuring device, in particular based on ultrasound.
  • the first line can be used to determine the defect.
  • the measuring device can be removed from the line again and then possibly a renovation of a detected defect can be performed.
  • other measuring devices can be introduced before or after the renovation in the line.
  • the object mentioned in the introduction is achieved in that when forming a Foundation element at least one line is inserted into the foundation element, that a cutting device is provided, with which in the at least one line in the region of the defect to be rehabilitated in the foundation element an opening can be generated, which forms an access to the defect, and that a feed device for introducing a hardening filling medium is provided via the line in the defect.
  • a preferred embodiment of the invention is that at least one supply line and at least one discharge line are arranged, between which the defect lies in the foundation element, that via the supply line by means of the feed device, the curable filling medium is introduced into the defect and that over the at least one derivative damaging material from the defect to the outside of the foundation element is derivable. In this way, even larger defects and larger amounts of harmful material can be efficiently removed from the created foundation element and the fault repaired with it.
  • the at least one line is formed as a tube which is fixed to a reinforcing cage, which is used in forming the foundation element in the foundation element.
  • the line is closed at the bottom and is sealed against the not yet solid, viscous material of the foundation element.
  • the tube is formed of metal or plastic and disposed along the struts of the metallic reinforcing basket. It can also be arranged distributed over the cross section of the foundation element several lines. With the relatively heavy reinforcing cage one or more lines can thus be provided with exact position in the foundation element.
  • any suitable cutting device can be used to open the line in the area of the defect.
  • the cutting device has a high-pressure lance which can be inserted into the line, by means of which a cutting medium can be conveyed under high pressure for cutting through a wall of the line in the area of the damaged area.
  • a cutting medium can be conveyed under high pressure for cutting through a wall of the line in the area of the damaged area.
  • water as a cutting medium with a pressure of up to 100 bar and beyond to be provided for opening the conduit wall.
  • the subsequent filling medium can preferably be supplied to the defect via the same high-pressure lance or via another feed device. Overall, the inlet or outlet can be filled.
  • a measuring device in particular an ultrasonic measuring device, which can be used to determine the defect in the line.
  • the measuring device can also be designed like a tube with a measuring head to detect defects in the structure of the created foundation element. After measuring the entire structure of the foundation element, the measuring device can be removed from the line again. Then, if necessary, a renovation can be carried out via the line according to the invention.
  • the approximately pile-shaped foundation element 10 has an approximately circular disk-shaped contact surface 12 and a cylindrical lateral surface 14.
  • a total of four tubular conduits 20 became uniform distributed over the cross-sectional area along the lateral surface 14.
  • the defect 40 is a region in which the foundation element 10 is not or not sufficiently formed with the concrete material of the foundation element 10. This can be caused by broken surrounding soil material.
  • the defect 40 in the region of the contact surface 12 can adversely affect the load capacity of the foundation element 10.
  • a renovation can be carried out according to the inventive method.
  • a first line 20 as a supply line 22 and a second line 20 as a derivative 24 are selected.
  • the respective walls 21 of the lead 22 and the lead 24 are broken to form an access 38 to the defect 40.
  • a high-pressure cutting device not shown, can be used.
  • a passage 36 is formed by the defect 40.
  • a filling medium in particular a concrete suspension, is introduced via the feed line 22 from the earth's surface via a pump, not shown, into the defect 40. Due to the discharge 24 formed, the suspension can flow through the defect 40 and convey out unwanted harmful material from the defect 40 through the discharge line 24 upwards out of the foundation element 10.
  • the further supply is terminated.
  • the defect 40 is filled with the filling medium, which can harden. Also, the remaining in the supply line 22 and the discharge 24 filler material can harden and thus increase the overall stability of the foundation element 10.
  • a different medium such as water, can be used to flush out the harmful material.
  • FIGS. 3 and 4 Another embodiment according to the invention is in the FIGS. 3 and 4 shown.
  • a total of four lines 20 are arranged distributed over the cross section of the foundation element 10.
  • the lines 20 were already in the creation of the foundation element 10 in this cast.
  • a defect 40 is formed exclusively in the region of a feed line 20.
  • a first access 38a to the defect 40 is thus created.
  • a filling medium can be introduced into the defect 40.
  • the invention can be used for the rehabilitation of all types of foundation elements, that is, of building structures created in the ground.

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)
  • Working Measures On Existing Buildindgs (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Claims (14)

  1. Procédé de remise en état d'un élément de fondation (10) en béton, selon lequel :
    - au moins un conduit (20) est prévu, dans l'élément de fondation (10), lors de la formation de l'élément de fondation (10),
    - une ouverture est pratiquée dans le au moins un conduit (20) dans la zone d'un défaut (40) dans l'élément de fondation (10) devant subir la remise en état, une lance à haute pression étant introduite dans le conduit (20) et un milieu de découpe étant amené sous haute pression par la lance à haute pression qui opère une découpe d'une paroi du conduit (20) et crée un accès (38) au défaut (40), et
    - un milieu de remplissage durcissable est introduit dans le défaut (40).
  2. Procédé selon la revendication 1,
    caractérisé :
    en ce que le matériau nuisible est expulsé du défaut (40) par le milieu de remplissage et est évacué en dehors de l'élément de fondation (10).
  3. Procédé selon la revendication 1 ou 2,
    caractérisé :
    en ce qu'au moins un conduit d'alimentation (22) et au moins un conduit d'évacuation (24) sont prévus, entre lesquels est situé le défaut (40) dans l'élément de fondation (10),
    en ce que le au moins un conduit d'alimentation (22) et le au moins un conduit d'évacuation (24) comportent une ouverture dans la zone du défaut (40), un passage (36) étant ainsi créé du conduit d'alimentation (22) au conduit d'évacuation (24) par le défaut (40), et
    en ce que le milieu de remplissage est conduit au défaut (40) par l'intermédiaire du au moins un conduit d'alimentation (22), et le matériau nuisible est conduit en dehors du défaut (40) par l'intermédiaire du au moins un conduit d'évacuation (24).
  4. Procédé selon l'une des revendications 1 à 3,
    caractérisé :
    en ce que, pour la formation du conduit (20), un tuyau est mis en place dans l'élément de fondation (10) lors de la fabrication, en particulier lors du bétonnage.
  5. Procédé selon l'une des revendications 1 à 4,
    caractérisé :
    en ce que l'élément de fondation (10) consiste en un pieu foré ou en un panneau de paroi réalisé par fraisage.
  6. Procédé selon l'une des revendications 1 à 5,
    caractérisé :
    en ce que, pour la formation du conduit (20), un ou plusieurs tuyaux, en métal ou en matière plastique, sont prévus.
  7. Procédé selon l'une des revendications 1 à 6,
    caractérisé :
    en ce qu'on utilise comme milieu de découpe de l'eau ou le milieu de remplissage.
  8. Procédé selon l'une des revendications 1 à 7,
    caractérisé :
    en ce qu'on utilise comme milieu de remplissage un coulis de ciment.
  9. Procédé selon l'une des revendications 1 à 8,
    caractérisé :
    en ce qu'un dispositif de mesure est mis en place dans le conduit (20) pour le repérage du défaut (40).
  10. Agencement de remise en état d'un élément de fondation (10) en béton, en particulier conformément à un procédé selon l'une des revendications 1 à 9, dans lequel :
    - au moins un conduit (20) est mis en place dans l'élément de fondation (10) lors de la formation de l'élément de fondation (10),
    - une lance à haute pression qui peut être mise en place dans le conduit (20) est prévue en tant que dispositif de découpe, avec laquelle une ouverture peutêtre pratiquée dans le au moins un conduit (10) dans la zone du défaut (40) dans l'élément de fondation (10) devant subir la remise en état, laquelle forme ainsi un accès (38) au défaut (40), et
    - un dispositif d'alimentation destiné à faire venir par le conduit (20) un milieu de remplissage durcissable dans le défaut (40) est prévu.
  11. Agencement selon la revendication 10,
    caractérisé :
    en ce qu'au moins un conduit d'alimentation (22) et au moins un conduit d'évacuation (24) sont disposés, entre lesquels est situé le défaut (40) dans l'élément de fondation (10),
    en ce qu'au moyen du dispositif d'alimentation, le milieu de remplissage durcissable peut être introduit par le conduit d'alimentation (22) dans le défaut (40), et
    en ce qu'en passant par le au moins un conduit d'évacuation (24), le matériau nuisible peut être évacué du défaut (40) vers l'extérieur de l'élément de fondation (10).
  12. Agencement selon la revendication 11,
    caractérisé :
    en ce que le au moins un conduit (20) est constitué sous la forme d'un tuyau, qui est fixé sur une cage d'armature, elle-même installée dans l'élément de fondation (10) lors de la formation de l'élément de fondation (10).
  13. Agencement selon une des revendications 10 à 12,
    caractérisé :
    en ce qu'au moyen d'une pompe, un milieu de découpe est transportée sous haute pression jusqu'au dispositif de découpe pour la découpe d'une paroi (21) du conduit (20) dans la zone du défaut (40).
  14. Agencement selon une des revendications 10 à 13,
    caractérisé :
    en ce qu'un dispositif de mesure, en particulier un dispositif de mesure par ultrasons, est prévu, qui peut être monté dans le conduit (20) pour le repérage du défaut (40).
EP14163361.0A 2014-04-03 2014-04-03 Procédé et agencement de nettoyage d'un élément de fondation en béton Not-in-force EP2927377B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14163361.0A EP2927377B1 (fr) 2014-04-03 2014-04-03 Procédé et agencement de nettoyage d'un élément de fondation en béton

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14163361.0A EP2927377B1 (fr) 2014-04-03 2014-04-03 Procédé et agencement de nettoyage d'un élément de fondation en béton

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EP2927377A1 EP2927377A1 (fr) 2015-10-07
EP2927377B1 true EP2927377B1 (fr) 2016-11-30

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113529829A (zh) * 2021-07-02 2021-10-22 中铁十九局集团华东工程有限公司 一种处理长大桩基桩底沉渣过厚及桩身混凝土夹层或松散的方法

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GB1493982A (en) * 1974-09-16 1977-12-07 Balfour Beatty Ltd Artificial or natural structures
ES2343055B1 (es) * 2009-01-20 2011-06-06 Alberto Gonzalo Carracedo Procedimiento de reparacion de cimentaciones de aerogeneradores.

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