EP2706148B1 - Procédé d'amélioration de la portance de profilés ouverts disposés dans le sol de fondation et système réalisé grâce à ce procédé - Google Patents

Procédé d'amélioration de la portance de profilés ouverts disposés dans le sol de fondation et système réalisé grâce à ce procédé Download PDF

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Publication number
EP2706148B1
EP2706148B1 EP13182032.6A EP13182032A EP2706148B1 EP 2706148 B1 EP2706148 B1 EP 2706148B1 EP 13182032 A EP13182032 A EP 13182032A EP 2706148 B1 EP2706148 B1 EP 2706148B1
Authority
EP
European Patent Office
Prior art keywords
profile
open
subsoil
displacement means
open profile
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
EP13182032.6A
Other languages
German (de)
English (en)
Other versions
EP2706148A1 (fr
Inventor
Jürgen Univ.-Prof. Dr.-Ing. Grabe
Tim Dipl.-Ing. Pucker
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.)
Technische Universitaet Hamburg TUHH
Tutech Innovation GmbH
Original Assignee
Technische Universitaet Hamburg TUHH
Tutech Innovation GmbH
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 Technische Universitaet Hamburg TUHH, Tutech Innovation GmbH filed Critical Technische Universitaet Hamburg TUHH
Priority to PL13182032T priority Critical patent/PL2706148T3/pl
Publication of EP2706148A1 publication Critical patent/EP2706148A1/fr
Application granted granted Critical
Publication of EP2706148B1 publication Critical patent/EP2706148B1/fr
Not-in-force legal-status Critical Current
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
    • 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
    • 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
    • E02D5/808—Ground anchors anchored by using exclusively a bonding material

Definitions

  • the invention relates to a method for improving the sustainability of set in a ground with pore space open profiles. Furthermore, the invention relates to a system of an open profile and an open profile enclosed, having a pore space ground.
  • Open profile means a component with a self-contained, in the longitudinal direction along the profile substantially the same cross-section.
  • the profile is open at the bottom and top. Accordingly, open profiles in addition to circular casings and square tubes, box sections, shafts, caissons and the like can be.
  • the DE 19 66 479 C3 shows a method for producing grouted anchors or piles provided with foot widening, which are simultaneously formed as injection tubes, through which a flowable preparation containing isocyanate group-containing compounds is injected.
  • plastic-based injection means is for example from the DE 43 30 244 A1 as well as the DE 100 18 395 B4 , in particular based on 2-component polyurethane injection resin known.
  • the US 2011/0038675 A1 describes a method of soil reinforcement in which a soil reinforcing steel tube is drilled into the soil and then an injection material is pressed, wherein the material from the pipe inside passes through a plurality of through holes in the outer space.
  • the displacement means is introduced centrally along the profile axis.
  • the tension of the profile in the ground when setting the profile is significantly reduced, since the initially loose to medium-density floor is compacted by the vibration of the profile.
  • the tension of the profile in the ground is increased again. This is done by preferably passing centrally through an expansion by the displacement means. The soil is sheared. In the Scherfuge dilated by its volume, which is prevented due to the boundary condition, namely the enclosed profile and leads to considerable tension. This achieves a significant increase in the stress state at the contact surface between the profile and the ground (ground).
  • even low-capacity floors can significantly increase the carrying capacity by the displacement process.
  • the displacing agent is a swellable injection medium, which then swells, filling the pore space in the area of the ground covered with the profile with the swellable injection medium and then swelling the injection means achieves a significantly increased soil tension and thus, as it were, closure of the open profile. whereby the load capacity of the already introduced profile increases according to the prevailing at the foot of the profile vertical stress.
  • the displacement means is a full profile occupying a part of the cross-sectional dimension of the open profile, which is used in the area enclosed by the open profile of the ground, is driven by the solid profile driven into the ground profile of the ground in the open profile enclosed area compacted, whereby a significant increase in voltage occurs and this in turn acts like a closure of the open profile. Accordingly, the carrying capacity of the introduced profile increases. In extreme cases, a solid profile can only be pressed into the dense soil when the grains break or the outer tube expands.
  • the open profile is slightly distended by the subsequent bracing of the area enclosed by the open profile area of the ground with the profile by introducing a displacement means, also carried a voltage increase on the outside of the profile, ie on the contact surface of the profile wall with the outer ground. Due to the increased tension of the contact surface between the profile and the outer ground, the skin friction increases correspondingly, which results in a further increased bearing capacity.
  • the carrying capacity can be increased by introducing injection means near the profile wall on the outside of the open profile.
  • the tension in the subsoil is preferably also increased at the outer contact surface of the profile.
  • the injection agent is preferably introduced over the entire circumference of the profile at a suitable depth.
  • the displacement means is a solid profile with 5% to 50% of the cross-sectional dimension of the open profile, which is inserted centrally along the profile axis in the area of the ground enclosed by the open profile, the floor is enclosed in the open profile by insertion of the solid profile Area compacted and braced, making this area virtually forms a plug and accordingly increases the carrying capacity of the profile.
  • the solid profile has 8% to 25% of the cross-sectional dimension of the open profile.
  • the ground is laterally around the profile with a embedment depth T in the ground in an extent of 1/20 T to 1/1 T, in particular 1 / Provide 10 to 1/4 T with the injectable.
  • the profile in its profile wall weakening zones or slots, where a greater expansion of the profile is possible, a greater expansion of the profile is made possible during bracing of the open profile enclosed area of the ground, so that this also with the outside of the profile wall causes a stronger contact with the surrounding ground, so that here the jacket friction increases further. Accordingly, the carrying capacity of the introduced profile can be further increased.
  • Weakening zones are, for example, local areas in the profile wall, which have a significantly lower material thickness or are made of a different, softer material.
  • slots which are preferably aligned substantially parallel profile axes, the expansion of the profile can be significantly facilitated.
  • the weakening zones and / or slots must not weaken the strength of the profile for placement in the ground and initiation of the payloads.
  • Fig. 1 shows in a first embodiment, an open profile 1, which is formed with a profile wall 10 in tube form. How out Fig. 1 can be seen, the open profile 1 is introduced vertically for a building foundation in the ground 2 and is for further structural use slightly with his profile head 11 on the ground surface 20 addition.
  • the open profile 1 has been introduced, for example, by vibration in the ground 2.
  • Im in Fig. 1 illustrated embodiment has been injected in the area enclosed by the profile 1 area 21 near the profile foot 12 a swellable injection medium 3 in the ground.
  • the injection medium 3 has a very low viscosity during injection, ie a high flowability, and fills the pore space in the soil in this injected region 21.
  • Injection agent 3 is triggered by the chemical reaction taking place in the injection agent, for example when it comes into contact with groundwater, the foaming and hardening process.
  • Such injection means 3 are known as intumescent in contact with water 2-component polyurethane injection resins, for example under the product name PUR-O-STOP manufacturer TPH Bausysteme GmbH, 22848 Norderstedt.
  • the ground 2 is further solidified in the enclosed area 21 and achieved a significant increase in voltage.
  • foaming the pore space of the bottom 2 is completely filled and a further pressure on the inside of the profile wall 10 as shown by the arrow in the horizontal cross-section in with further foaming Fig. 1a achieved shown open profile 1.
  • This clamping of the enclosed area 21 in the interior of the open profile 1 thus virtually achieves closure of the open profile 1 and increases the load capacity in accordance with the vertical ground tension prevailing on the foot 12 of the profile 1 (four parallel arrows on the profile foot 12).
  • a second embodiment is in Fig. 2 a cross section of a profile 1, similar to the representation according to Fig. 1a represented in which in the area enclosed by the profile 1 area 21, a solid profile 4 is introduced as a displacement means.
  • Components which correspond to the first exemplary embodiment are designated by the same reference numerals.
  • the profile 1 is slightly widened by the pressure generated by the driven solid profile 4, as shown by the dashed line (ground state) and the solid line for the profile wall 10.
  • the outside of the profile wall 10 is pressed against the outer ground, which also creates an increased tension, which is symbolized by the six inwardly directed smaller arrows. Consequently, the skin friction is increased on the outside of the profile wall 10, whereby the carrying capacity of the profile 1 is further increased.
  • injection means 3 could also be introduced externally around the open profile 1, whereby a further significant increase in load capacity is achieved by the tension of the open profile 1 via its contact surface, namely the outer profile wall, with the bottom and correspondingly higher skin friction.

Claims (15)

  1. Procédé d'amélioration de la portance de profilés ouverts (1) ayant une paroi de profilé (10) et qui sont mis en place dans un terrain de construction (2) ayant un espace poreux, avec les étapes suivantes :
    - mise en place du profilé (1) dans le terrain de construction (2) et
    - mise sous contrainte postérieure de l'espace (21) du terrain de construction (2) entouré par le profilé ouvert (1) à l'aide de la paroi de profilé (10) en introduisant un moyen de refoulement (3, 4) dans l'espace (21) du terrain de construction (2) entouré par le profilé ouvert (1).
  2. Procédé selon la revendication 1, caractérisé en ce que le moyen de refoulement (3, 4) est introduit de façon centrée le long de l'axe du profilé.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la mise en place du profilé ouvert (1) est réalisée par vibration ou par ajustement.
  4. Procédé selon la revendication 1, 2 ou 3, caractérisé en ce que le moyen de refoulement est un moyen d'injection apte à gonfler (3) qui gonfle par la suite.
  5. Procédé selon la revendication 1, 2 ou 3, caractérisé en ce que le moyen de refoulement est un profilé plein (4) occupant une partie de la section transversale du profilé ouvert et qui est placé dans l'espace (21) du terrain de construction (2) entouré par le profilé ouvert (1).
  6. Procédé selon la revendication 5, caractérisé en ce que la mise en place du profilé plein (4) à l'intérieur du profilé ouvert (1) est réalisée par vibration ou par ajustement.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que le profile ouvert (1) est légèrement dilaté par la mise sous contrainte postérieure de l'espace (21) du terrain de construction (2) entouré par le profilé ouvert (1) à l'aide de la paroi de profilé (10) en introduisant un moyen de refoulement (3, 4).
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'un moyen d'injection (3) est introduit à proximité de la paroi de profilé (10) du côté extérieur du profilé ouvert (1).
  9. Système constitué d'un profilé ouvert (1) et d'un terrain de construction (2) présentant un espace poreux et dans lequel est mis en place le profilé (1), caractérisé en ce que l'espace (21) du terrain de construction (2) entouré par le profilé ouvert (1) est mis sous contrainte à l'aide de la paroi de profilé (10) du profilé (1) par un moyen de refoulement (3, 4) introduit dedans.
  10. Système selon la revendication 9, caractérisé en ce que le moyen de refoulement est un moyen d'injection (3) moussé et durci dans l'espace poreux de l'espace (21) du terrain de construction (2) entouré par le profilé ouvert (1).
  11. Système selon la revendication 10, caractérisé en ce que le moyen d'injection (3) est une résine d'injection polyuréthane à deux composants qui présente une expansion linéaire sans contrainte de 10 % à 200 %, de préférence de 20 % à 100 %.
  12. Système selon la revendication 9, caractérisé en ce que le moyen de refoulement est un profilé plein (4) avec 5 % à 50 % de la section transversale du profilé ouvert, lequel profilé plein est introduit le long de l'axe du profilé de façon centrée dans l'espace (21) du terrain de construction (2) entouré par le profile ouvert (1).
  13. Système selon la revendication 10, caractérisé en ce que le profilé plein (4) a de 8 % à 25 % de la section transversale du profilé ouvert.
  14. Système selon l'une des revendications 9 à 13, caractérisé en ce que, pour une profondeur d'engagement (T) dans le terrain de construction (2), le terrain de construction (2) est muni du moyen d'injection latéralement autour du profilé (1) sur une étendue comprise entre 1/20 T et 1/1 T, notamment entre 1/10 T et ¼ T.
  15. Système selon l'une des revendications 9 à 14, caractérisé en ce que le profilé (1) est muni de zones de faiblesses ou de fentes dans sa paroi de profilé (10), dans lesquelles une dilatation importante est possible.
EP13182032.6A 2012-08-30 2013-08-28 Procédé d'amélioration de la portance de profilés ouverts disposés dans le sol de fondation et système réalisé grâce à ce procédé Not-in-force EP2706148B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL13182032T PL2706148T3 (pl) 2012-08-30 2013-08-28 Sposób poprawy nośności otwartych profili osadzonych w gruncie budowlanym oraz utworzony przez nie system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012108038 2012-08-30

Publications (2)

Publication Number Publication Date
EP2706148A1 EP2706148A1 (fr) 2014-03-12
EP2706148B1 true EP2706148B1 (fr) 2014-10-15

Family

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Application Number Title Priority Date Filing Date
EP13182032.6A Not-in-force EP2706148B1 (fr) 2012-08-30 2013-08-28 Procédé d'amélioration de la portance de profilés ouverts disposés dans le sol de fondation et système réalisé grâce à ce procédé

Country Status (3)

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EP (1) EP2706148B1 (fr)
DK (1) DK2706148T3 (fr)
PL (1) PL2706148T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL2998448T3 (pl) 2014-09-22 2017-06-30 Tutech Innovation Gmbh Sposób poprawy nośności otwartych profili osadzonych w gruncie budowlanym, a także system oparty na tych profilach

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL150184B (nl) 1968-03-21 1976-07-15 Takenaka Komuten Co Werkwijze voor het verstevigen en voor water ondoordringbaar maken van grond.
DE1966479C3 (de) 1968-03-21 1981-07-23 Kabushiki Kaisha Takenaka Komuten, Osaka Verfahren zum Herstellen von Verpreßankern oder mit Fußerweiterungen versehenen Pfählen im Boden
NL8700512A (nl) 1986-10-06 1988-05-02 Ballast Nedam Groep Nv Fundering en werkwijze voor het vervaardigen daarvan.
DE4330244A1 (de) 1993-09-07 1995-03-09 Henkel Kgaa Vereinfachtes Verfahren zur Erdreichstabilisierung
DE10018395B4 (de) 2000-04-13 2004-07-15 Bayer Ag Polyurethanschäume mit geringer Exothermie
US20110038675A1 (en) 2008-10-02 2011-02-17 Nippon Steel Corporation Steel pipe for reinforcing ground, method of reinforcing ground using the same, and method of reinforcing structure
TR200906475A1 (tr) 2009-08-21 2011-03-21 Mete Erdemg�L Enver Yapı destekleme sistemi.

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Publication number Publication date
EP2706148A1 (fr) 2014-03-12
DK2706148T3 (en) 2015-01-12
PL2706148T3 (pl) 2015-03-31

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