EP2907923B1 - Tuyau souple en matériau géotextile et procédé de stabilisation d'un sous-sol - Google Patents

Tuyau souple en matériau géotextile et procédé de stabilisation d'un sous-sol Download PDF

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Publication number
EP2907923B1
EP2907923B1 EP15154511.8A EP15154511A EP2907923B1 EP 2907923 B1 EP2907923 B1 EP 2907923B1 EP 15154511 A EP15154511 A EP 15154511A EP 2907923 B1 EP2907923 B1 EP 2907923B1
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EP
European Patent Office
Prior art keywords
tube
threads
transverse threads
transverse
tensile
Prior art date
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Active
Application number
EP15154511.8A
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German (de)
English (en)
Other versions
EP2907923A1 (fr
Inventor
Hartmut Hangen
Oliver Detert
Heiko Pintz
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.)
Huesker Synthetic GmbH and Co
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Huesker Synthetic GmbH and Co
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Publication date
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Publication of EP2907923A1 publication Critical patent/EP2907923A1/fr
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/08—Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00—Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00—Materials
    • E02D2300/0085—Geotextiles
    • E02D2300/0087—Geotextiles woven

Definitions

  • the invention relates to a tube made of geotextile material and a method for stabilizing the substrate.
  • the stabilization of the subsoil with hoses made of geotextile material has been a proven method for the formation of stable areas for traffic routes and structures for around 20 years.
  • the insufficiently sustainable soil material is removed from the casing pipe or the casing pipe is introduced with a drill bit into the soil, so that it displaces the insufficiently sustainable soil material.
  • a tube of geotextile material can either be placed in the jacket tube or wrap the jacket tube. Then a column of viable material is produced by pourable filler material, in particular very hard material such as gravel sand, rock or the like, is poured into the jacket tube and fills the tube. When pulling the jacket tube, the filling material is compressed under expansion of the tube.
  • the object of the invention is to improve such a hose made of geotextile material and a method for stabilizing the substrate using this hose such that the stabilization can be done with less effort with the same or greater sustainability.
  • This hose can be introduced into the ground with a reduced diameter casing tube, namely the diameter defined by the shrinkage force of the highly elastic transverse threads.
  • the effort in introducing the jacket tube and the hose is due to the smaller diameter of the jacket tube and the lower Force required for the introduction of this jacket tube considerably reduced.
  • the transverse threads reduced strength can be highly elastic and are introduced, for example under tension in the structure of the hose. After production of the textile material, these highly elastic transverse threads relax, so that the tube substantially has a circumference which corresponds to the length of the relaxed transverse threads with reduced strength.
  • the highly elastic transverse threads may be stretchable by at least 50 percent of their length. This is achieved, for example, when using transverse threads of elastomeric threads.
  • the geotextile hose according to the invention can be installed with a jacket tube with a reduced diameter. Due to the reduced diameter of the jacket tube, the forces for introducing the jacket tube are reduced. Also, the cost and cost of lifting and removing the insufficiently sustainable soil material from the jacket tube are reduced.
  • the circumference of the finished pillar of structural material may be more than twice the circumference of the relaxed tubing introduced with the mandrel. Since the circumference and diameter of a circle are linked linearly, the diameter of the column can also be increased by 50 percent or more when compacting the load-bearing material. This significant expansion of the tube during the compaction of the filled soil material substantially increases the pressure acting on the filled soil from outside and thus the strength of the resulting columns of load-bearing material.
  • the transverse threads can be highly elastic with reduced strength.
  • the elastic drawstrings When filling the load-bearing soil material, the elastic drawstrings are stretched to the length of the high-strength, less elastic threads.
  • the term "low elasticity" is to be interpreted for the transverse yarns in relation to synthetic yarns.
  • So-called high-strength, less elastic threads consist of synthetic yarns with a high tensile strength and a low elongation at break.
  • the elongation at break is in the range of 12% for a polyester yarn.
  • the highly elastic threads can be stretched for example by 100% of their relaxed length.
  • the highly elastic threads can hardly increase the internal pressure of the load-bearing material within the geotextile hose but stretch when filling the hose.
  • the low-elasticity and high-strength threads allow only a slight stretching of the tube and limit the maximum expansion of the tube.
  • the geotextile hose is made of a round-woven, geotextile material, the transverse threads being weft threads.
  • the proportion of reduced strength transverse filaments in the total number of transverse filaments may be 25 percent or less in practice. It is e.g. makes sense to replace every fourth to sixth transverse thread by an elastic cross thread with reduced strength. From 40 percent, the proportion of elastic threads becomes uneconomically high.
  • the object of the invention is achieved in terms of a method for introducing filler into a hole in the ground, in which the filler is filled into a tensile prefabricated tubular sheath of geotextile with high-strength and less elastic longitudinal threads and transverse threads, that as a shell Hose of the type described above is used.
  • a hole can first be made by excavation or drilling, in which subsequently the jacket tube is introduced with the hose.
  • This procedure has the advantage that the tube surrounding the jacket tube is only slightly loaded during installation.
  • a tip at the lower end of the jacket tube whose diameter is slightly larger than the diameter of the jacket tube with the hose.
  • the tip can be shaken into the ground or rotated by a boring device. It may remain as a lost point in the bottom of the well after the well is made. In this case, the tube consisting of the tube is lowered together with the tool into the hole.
  • a deep vibrator can be used, for example a deep vibrator marketed under the name TR17 by Bauer Maschinen GmbH in Schrobenhausen.
  • a deep vibrator has a vibrating tip, which is driven together with a ballast pipe by vibrations in the ground. The vibrating tip displaces the soil material.
  • the ballast tube When dragging the deep vibrator, the ballast tube will fill with material under the vibrator tip remaining hole poured.
  • the filling material is compacted by vibrating the casing tube in a manner similar to that during filling.
  • the low-elastic transverse threads of the tubular sheath are so far stretched during filling of the filling material, that on the one hand, the required voltage is achieved, on the other hand, sufficient traction reserves are available and thus the lasting support effect is guaranteed.
  • the tube structure described above is suitable for wrapping further stabilization elements to be introduced into the soil.
  • the cladding may be formed from a tube of the type described above.
  • FIG. 1 In the Fig. 1 is an excavator 1 can be seen, on which a holding frame 2 is arranged with a broker 3. At the leader 3, a carriage 4 is guided vertically displaceable. On the carriage 4 is a vibrator, a Casing pipe 5 shakes into the insufficiently strong soil material. A second jacket tube 5 is already shown in the fully vibrated state to the right of the jacket tube 5 to be necked.
  • a tube of geotextile material described in more detail below is introduced into the soil, which is filled by a second excavator 6 with hard material, in particular gravel sand, rock or the like.
  • hard material in particular gravel sand, rock or the like.
  • Fig. 1 two casing pipes 7 filled with hard material are shown.
  • the jacket tubes 7 have at the lower end of a hinged tip, so that they can be pulled by an excavator 8 again.
  • a textile-coated column of hard material 9 then remains in the bottom.
  • the jacket tube 5 is applied during pulling by a vibrator with vibrations, so that the filled material is compressed. Since the tube 14 described below in more detail made of geotextile material is elastic, the diameter of the column 9 after pulling the jacket tube 5 is greater than the diameter of the jacket tube 5 itself.
  • FIGS. 2 and 3 show a section of a geotextile material to form a tube described here.
  • the geotextile material 10 is shown in a relaxed state.
  • Fig. 3 shows the in Fig. 2 recognizable portion of the geotextile material 10 in a stretched state.
  • the 4 and 5 show the details IV and V from the FIGS. 2 and 3 in an enlarged view, showing the geotextile material 10 of the tube in a relaxed and tensioned state.
  • the geotextile material 10 is woven. It has high-strength warp threads 11. In 4 and FIG. 5 is in each case only one of the warp threads with a reference numeral Mistake.
  • the warp threads 11 extend at regular intervals parallel to each other and are in the Fig. 2 to 5 shown vertically from top to bottom.
  • weft threads 12, 13 extending in the transverse direction of the fabric are interwoven.
  • the weft threads 12 and 13 are woven under tension with the warp threads 11.
  • the finished geotextile has the in the Fig. 5 recognizable structure.
  • the weft threads 12 have a smaller diameter and consist of high-strength and less elastic material.
  • wefts 13 are used with reduced strength, which are shorter in the relaxed state than the high-strength, low-elastic transverse threads 12.
  • the transverse to the warp threads 11 weft threads 13 with reduced strength are usually highly elastic and are in the weaving of the textile tube under tension in introduced the structure of the hose. Their length in the stretched state is almost twice as large as in the relaxed state.
  • the tension force in the transverse direction or weft direction (in the drawings: horizontal direction) no longer acts on the elastic weft threads 13.
  • the transverse weft threads 13 relax with reduced strength and pull the tube 14 together.
  • the inelastic and high-strength weft threads 12 form a wavy course. This one is in the Fig. 6 and 8th to recognize.
  • the diameter of the tube 14 is about 30% smaller in the relaxed state than in the tensioned state.
  • the jacket tube 5 for introducing the tube 14 may have a smaller diameter than before. In other words, the diameter of the jacket tube 5 is considerably smaller than the diameter of the column produced. As a result, occur during Einvibrieren the jacket tube 5 in the insufficiently sustainable soil smaller forces.
  • the increase in the diameter of the textile tube 14 during filling is particularly good in the 6 and 7 as well as 8 and 9.
  • the manufacturing method of the textile material is not limited to a weaving method.
  • the longitudinal threads and transverse threads also crossed one over the other and connected to each other eg by Raschelfäden.
  • the Fig. 10.1 to 10.4 show a the Verbauhabilit from the Fig. 1 similar procedure.
  • a holding frame 2 with a broker 3 is arranged on an excavator 1.
  • the broker 3 carries a deep vibrator 15 which is shaken together with a ballast pipe 16 into the ground.
  • the deep vibrator 15 and the ballast pipe 16 are wrapped with a tube 14 of the type described above.
  • the deep vibrator 15 has reached the predetermined depth within the soil.
  • Gravel or ballast is then filled through the ballast pipe 16 via a charging container, while the deep vibrator 15 and the ballast pipe 16 are pulled.
  • the elastic tube 14 expands, as in Fig. 10.3 seen.
  • Fig. 10.4 This process is almost complete and the existing column of gravel or gravel reaches almost to the surface of the soil.
  • the exact function of the deep vibrator 15 is shown in the publication "Subsoil improvement with deep vibrator" 11/2011 of Bauer Maschinen GmbH, Schrobenhausen.
  • the Fig. 11 shows a further intended use of the hose 14 according to the invention. Shown is a grout anchor 17 according to the European Patent Application EP 0 499 144 A1 , When inserting the injection anchor 17 in a wellbore 18 of the grout anchor 17 is wrapped with the above-described tube 14 of geotextile material to avoid damage or reduce.
  • the tube 14 of geotextile material extends in the illustration of Fig. 12 for the sake of clarity, only over a portion of the height of the iron grid basket 19. In practice, the hose 14 may extend over the entire height of the Iron grid basket 19 extend.
  • the iron mesh basket 19 is inserted into a bore in the bottom which has a larger diameter than the iron mesh basket 19.
  • the hose 14 described above expands by stretching its low strength transverse threads. This arrangement is particularly intended for the temporary sheathing of concrete piles in holes in karst soils with underground cavities.
  • the tube 14 made of geotextile material largely prevents the inflow of the filled concrete in the cavities. The retained by the hose 14 concrete forms a stable pillar.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Soil Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Piles And Underground Anchors (AREA)

Claims (13)

  1. Tuyau en matériau géotextile (10) ayant des fils longitudinaux (11), qui s'étendent essentiellement dans la direction axiale du tuyau, et des fils transversaux (12), qui s'étendent essentiellement dans la direction circonférentielle du tuyau, dans lequel les fils longitudinaux (11) et les fils transversaux (12) sont formées de fils à faible élasticité et haute résistance, caractérisé en ce qu'il présente des fils transversaux supplémentaires (13) d'une moindre résistance, qui sont plus courts à l'état détendu que les fils transversaux (12) à faible élasticité et haute résistance.
  2. Tuyau selon la revendication 1, caractérisé en ce que les fils transversaux (13) de moindre résistance sont des fils à forte élasticité qui sont insérés sous tension dans la structure du tuyau.
  3. Tuyau selon la revendication 1 ou 2, caractérisé en ce que les fils transversaux à forte élasticité (13) et de moindre résistance sont étirables sur au moins 50 % de leur longueur.
  4. Tuyau selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est réalisé en matériau géotextile tissé de manière circulaire, et que les fils transversaux (12, 13) sont des fils de trame.
  5. Tuyau selon l'une quelconque des revendications précédentes, caractérisé en ce que la proportion de fils transversaux (13) de moindre résistance sur le nombre total de fils transversaux est de 40 % ou moins, de préférence de 25 %.
  6. Tuyau selon la revendication 5, caractérisé en ce que les fils transversaux (13) de moindre résistance sont insérés à intervalles réguliers entre les fils transversaux à haute résistance (12).
  7. Procédé de mise en place d'un matériau de remplissage dans un trou situé dans le sol, dans lequel le matériau de remplissage est versé dans une gaine en forme de tuyau préfabriqué résistant à la traction en un matériau géotextile (10) ayant des fils longitudinaux à haute résistance et à faible élasticité (11) et des fils transversaux (12), caractérisé en ce qu'un tuyau selon l'une quelconque des revendications précédentes est utilisé comme gaine.
  8. Procédé selon la revendication 7, caractérisé en ce qu'il comporte les étapes suivantes :
    a) un tube de protection (5) enveloppé de la gaine est introduit dans le sous-sol à des emplacements discrets;
    b) un matériau de sol durable, en particulier un matériau particulièrement dur comme du gravier, de la roche ou similaire, est versé dans la gaine à travers le tube de protection,
    c) le matériau de sol durable est comprimé par vibration du tube de protection (5) en tirant sur le tube de protection (5).
  9. Procédé selon la revendication 8, caractérisé en ce qu'au début, du matériau de sol est enlevé en faisant un trou, puis ensuite le tube de protection (5) est inséré dans le trou avec le tuyau.
  10. Procédé selon l'une quelconque des revendications 7 à 9, caractérisé en ce que pendant le versement du matériau de remplissage, les fils transversaux à faible élasticité (12) de la gaine en forme de tuyau sont tendus tels que d'une part la tension requise est atteinte, et que d'autre part des réserves de puissance suffisantes sont disponibles, et qu'ainsi l'action de support permanente est garantie.
  11. Procédé selon la revendication 7 ou 8, caractérisé en ce que la gaine en forme de tuyau est abaissée avec un outil pour la production du trou.
  12. Procédé selon la revendication 7, caractérisé en ce que le tuyau (14) enveloppe une cage (19) constituée de fers d'armature, qui va être remplie d'un matériau de remplissage.
  13. Procédé pour la mise en place d'un tirant d'ancrage (17) dans un trou (18) situé dans le sous-sol, caractérisé en ce que le tirant d'ancrage (17) est recouvert d'un tuyau (14) selon l'une quelconque des revendications 1 à 6.
EP15154511.8A 2014-02-14 2015-02-10 Tuyau souple en matériau géotextile et procédé de stabilisation d'un sous-sol Active EP2907923B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014101914.8A DE102014101914B3 (de) 2014-02-14 2014-02-14 Schlauch aus geotextilem Material und Verfahren zur Stabilisierung des Untergrundes und Verfahren zum Einbringen eines Verpressankers

Publications (2)

Publication Number Publication Date
EP2907923A1 EP2907923A1 (fr) 2015-08-19
EP2907923B1 true EP2907923B1 (fr) 2016-06-01

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EP15154511.8A Active EP2907923B1 (fr) 2014-02-14 2015-02-10 Tuyau souple en matériau géotextile et procédé de stabilisation d'un sous-sol

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EP (1) EP2907923B1 (fr)
DE (1) DE102014101914B3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3329053A4 (fr) * 2015-07-27 2019-03-27 Geopier Foundation Company, Inc. Coques extensibles à fond ouvert et procédés associés pour la construction de pilier de support
DE202021000550U1 (de) * 2021-02-13 2022-05-16 Gerolda Fulde Textiles Tragglied zur Einleitung von Zug- oder Druckkräften in den Untergrund, welches für Böschungssicherungen, zur Verankerung von Schutzbauwerken gegen Naturgefahren und bei allgemeinen geotechnischen Anwendungen eingesetzt wird und mit dem Untergrund einen direkten Kraftübertrag herstellt
DE102022118798A1 (de) * 2022-07-27 2024-02-15 Huesker Synthetic Gmbh Verformbare Fundamentschalung für die Herstellung eines unterirdischen Fundaments

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4123013A1 (de) * 1991-02-09 1992-08-13 Ernst Dipl Ing Reichert Verpressanker und verpresspfahl
DE4408173C5 (de) * 1994-03-10 2006-04-27 Josef Möbius Bau-Gesellschaft (GmbH & Co.) Verfahren zur Stabilisierung des Untergrundes und zur Abtragung von Bauwerks- und Verkehrslasten
DE19518830B4 (de) * 1994-03-10 2005-02-24 Josef Möbius Bau-Gesellschaft (GmbH & Co.) Verfahren zur Stabilisierung des Untergrundes und zur Abtragung von Bauwerks- und Verkehrslasten
DE102004013790A1 (de) * 2004-03-20 2005-10-06 Josef Möbius Bau-Aktiengesellschaft Verfahren und Vorrichtung zum Eintreiben und Ausziehen von stabförmigen Elementen in den oder aus dem Boden

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
DE102014101914B3 (de) 2015-06-25
EP2907923A1 (fr) 2015-08-19

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