EP1270825A1 - Einrichtung zum Ausgleichen von Grundsenkungen - Google Patents

Einrichtung zum Ausgleichen von Grundsenkungen Download PDF

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Publication number
EP1270825A1
EP1270825A1 EP01401636A EP01401636A EP1270825A1 EP 1270825 A1 EP1270825 A1 EP 1270825A1 EP 01401636 A EP01401636 A EP 01401636A EP 01401636 A EP01401636 A EP 01401636A EP 1270825 A1 EP1270825 A1 EP 1270825A1
Authority
EP
European Patent Office
Prior art keywords
tube
inflatable
orifices
liquid
series
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
Application number
EP01401636A
Other languages
English (en)
French (fr)
Other versions
EP1270825B1 (de
Inventor
Géraldus Evers
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.)
Compagnie du Sol SARL
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Compagnie du Sol SARL
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 Compagnie du Sol SARL filed Critical Compagnie du Sol SARL
Priority to DE60124886T priority Critical patent/DE60124886T2/de
Priority to EP01401636A priority patent/EP1270825B1/de
Priority to AT01401636T priority patent/ATE346990T1/de
Publication of EP1270825A1 publication Critical patent/EP1270825A1/de
Application granted granted Critical
Publication of EP1270825B1 publication Critical patent/EP1270825B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D35/00—Straightening, lifting, or lowering of foundation structures or of constructions erected on foundations

Definitions

  • the present invention relates to a device for compensation of ground movements and the application of said device to the correction of the profile of an embankment or compensation of movement of soil due to an underground structure.
  • Transition zones between access embankment and civil engineering structure are often problematic when this set is made in presence of compressible layers, especially under embankments access.
  • the structure is generally carried out on deep foundations which are therefore stable while the ground compressible under the embankments forming the access road is subject to more or less significant settlements in amplitude and over time. It is thus forms a differential settlement between the access embankment and the structure art itself in this transition zone. In the absence of special measures, this settlement would result in a drop unacceptable for the operation of the structure.
  • FIG. 1a a work of art has been represented, for example a bridge, referenced 10 constituted by a vertical structure 14 and an apron 16.
  • a work of art has been represented, for example a bridge, referenced 10 constituted by a vertical structure 14 and an apron 16.
  • the compressible soil compresses and this results in a compaction of the access road, which will be called dS thereafter.
  • the work of art is generally founded, by via foundation elements, on the foundation layer 22, and the settlement of this structure is negligible compared to the settlement of the access road. Differential settlement between access road and structure of art makes normal exploitation of the work often impossible.
  • a classic solution is to set up in the backfill with concrete transition slabs to distribute the differential settlement over a certain length and thus reduce the declivity.
  • the dimensions of these slabs are in practice limited to about 5 to 6 meters in length, because beyond this length the mechanical stresses applied to the plates become excessive and would require plate thicknesses impossible to enforce.
  • This solution therefore has its limits and, in the event of ground compressible, the slope is reached at more or less regular intervals maximum acceptable.
  • This figure shows surface structures 90, 92 with their foundations on piles 90 ', 92'.
  • An object of the present invention is to provide a device for correction of the profile of an embankment constituting in particular an access road to a structure that effectively maintains the inclination of the access path to an acceptable value, and which makes it possible to carry out several times this correction to take into account the evolution of the profile in the time.
  • the inflation liquid must have adequate properties to allow repetitive swelling of the inflatable parts to compensate for the evolution over time of the profile backfill.
  • the inflation fluid must have a adjustable grip, low viscosity and good stability, while after taken, the product must remain deformable while exhibiting rigidity sufficient.
  • Grouts that can meet these needs are, as an indication but not limiting: grouts based on stabilized cement, bentonites rigidified de-flocculated (also called “super-gels”), soils silica or resins.
  • the device comprises a plurality of tubes which are intended to be placed in horizontal boreholes substantially parallel to each other.
  • We can thus, by provoking selective swelling of inflatable organs associated with different tubes, correcting the effects of ground movements in a plan.
  • the movable elements for closing the orifices of each tube are cuffs surrounding the tube and made in one elastically deformable material under the effect of the pressure of the liquid.
  • Such tubes are in themselves commonly used in grout injection techniques into the ground and are specifically called cuff tubes.
  • the tubing means comprise a pipe whose second end is closed and provided with holes proximity of said second end, the two controllable means shutter being arranged on either side of said holes.
  • each controllable means shutter consists of an inflatable element surrounding said pipe, each inflatable element being capable, in the expanded state, of closing off said tube.
  • the holes provided at the end of the liquid injection pipe under pressure can be brought to the right of each series of orifices formed in the tube and, by controlling the inflatable elements arranged on either side of these holes, it is possible to define a area in the tube in which the pressure of the liquid increases enough to open the cuffs of the tube openings and cause thus the passage of the charged liquid in the inflatable members for give them the desired volume in order to obtain the necessary correction of the embankment profile.
  • the invention also relates to the application of the device to the correction of the profile of an embankment, characterized in that said tubes are arranged in the embankment substantially parallel to each other and substantially perpendicular to the direction of the embankment.
  • the invention also relates to an application of the device characterized in that the said tube or tubes are arranged in boreholes tilted or directed.
  • the correction device essentially consists of at least one tube T 1 and preferably a plurality of tubes T i which are placed in horizontal holes F i which extend over the entire width of the embankment and which are arranged perpendicularly to the main direction of this embankment parallel to each other.
  • each tube T i is equipped as will be explained later in more detail with inflatable elements G i, j distributed over the length of the tube T i .
  • the correction of the profile in the direction orthogonal to the embankment is obtained by appropriately inflating the various inflatable elements G i, j and the correction of the profile of the embankment along its main direction is obtained by selectively inflating the inflatable elements G i, j associated with the different tubes T 1 ... T i .
  • the tube T i is a rigid metallic tubular piece 50 which can be introduced into the horizontal holes F i . Over its length, the tube 50 has series of orifices 52 j which are covered by an elastically deformable cuff 54 j .
  • Cuff tubes are per se known in particular in techniques for injecting grout under pressure for soil consolidation.
  • the deformable cuff 54 j moves away from the external wall of the tube and allows the exit of the liquid under pressure.
  • an inflatable member G i, j constituted by a deformable wall 56.
  • This deformable wall can be fixed to each of these ends by flanges 58.60 on the external face of the tube T i .
  • the wall of the inflatable member is metallic, it is preferable to provide that one of the flanges 58 is fixed and that the other flange 60 can slide in leaktight manner on the external face of the tube in order to facilitate the expansion of the inflatable organ.
  • the same inflatable member may correspond to several series of orifices 52 j .
  • the deformable envelope 56 can be produced using a metal wall or a synthetic material. This wall must be strong enough to withstand the pressure of the liquid on the one hand under pressure and on the other hand the static load linked to the embankment.
  • the inflation fluid which will be preferably a cement-based grout or a resin-based grout synthetic is sufficiently fluid to allow filling successive in time of inflatable elements using grout without previous injections prevent access to the elements inflatable.
  • This device which has the general reference 70 is constituted by a rigid pipe 72 whose diameter is substantially less than the internal diameter of the tube T i .
  • a first end of the pipe 72 is closed by a plug 74 while its second end 76 can be connected to a flexible grout supply pipe.
  • the pipe 72 Near the plug 74, the pipe 72 has a series of holes such as 78.
  • Inflatable closure elements 80 and 82 are mounted on the external face of the pipe 72 on either side of the holes 78.
  • the elements 80 and 82 are inflatable envelopes.
  • the swelling of the shutters 80 and 82 is obtained, in this particular embodiment, by an annular pipe 84 surrounding the pipe 72 and into which a liquid F for controlling the elements 80 and 82 can be injected.
  • the annular pipe 84 comprises of course orifices 86 in line with members 80 and 82 to allow swelling.
  • the liquid F for controlling elements 80 and 82 could be routed through a small flexible tube connected to elements 80 and 82.
  • the system 70 is introduced into the corresponding tube T i and the system 70 is set up in such a way that these inflatable obturation elements 80 and 82 are arranged on either side of the series of orifices 52 j of the inflatable member to be activated.
  • the control liquid F is sent into the annular conduit 84 which causes the closure structures 80 and 82 to swell until they come into contact with the internal wall of the tube T i to obtain the sealing.
  • the pressure grout C is introduced into the pipe 72. This grout exits through the orifices 78, which increases its pressure in the volume V inside the tube T i between the shutter elements 80 and 82.
  • the increase in the pressure of the grout in this volume V causes the lifting of the cuff 54 j and the passage of the grout in the inflatable member G i, j .
  • a device for measuring the volume or the flow of grout makes it possible to obtain the desired inflation of the inflatable member G i, j .
  • each inflatable member G i, j corresponds, for example, to two series of orifices 52 j and therefore two deformable cuffs 54 j in order to facilitate filling of the inflatable member.
  • FIG. 6 shows a first alternative embodiment of the device.
  • plates 30 of length I are used, the various plates 30 preferably overlapping by one of their edges 30a.
  • Expandable structures G i, j (G 1, j , G 2,, j , G 3,, j ) associated with tubes T i are fixed to the underside 30b of a plate, preferably opposite the edge 30a of recovery.
  • discontinuous plates 30 there is therefore obtained using discontinuous plates 30, an effect having continuity, along the length of the access route, because it is possible, as has already been explained, to increase the volume of the expansible structures G i, j as the access road settles.
  • FIG. 7 represents a second variant of implementation of the invention in which the plates 30 are found with their waterproof expandable structures G i, j (G 1,, j , G 2,, j , G 3,, j , G 4,, j ) associated with the tubes T i .
  • the plates 30 are found with their waterproof expandable structures G i, j (G 1,, j , G 2,, j , G 3,, j , G 4,, j ) associated with the tubes T i .
  • support plates such as 32 of reduced dimensions compared to the distribution plates 30, the expandable structure 24 being interposed between the underside of the edge of the plate 30 and the upper face of the support plate 32. Thanks to the presence of the support plate 32, the lifting effect of the access path is improved upward under the effect of the expansion of the inflatable structures G i, j .
  • FIGS 8A and 8B, 8C illustrate two examples of use of the compensation device according to the invention for the protection of structures of surface with respect to ground movements likely to be created by drilling tunnels or, more generally, carrying out works underground.
  • FIG. 8A we find the surface structures 90, 92 with their pile foundations 90 'and 92'. It also included the location of tunnels 94 and 96 to be dug. Inclined holes such as 102, 104 are produced from the ground surface. Tubes T 1 , T 2 identical to that shown in FIG. 2 are introduced into these boreholes. Each tube T is equipped with elements inflatable G 1 ... G 4 in the portion of the boreholes located between the foundations and the area where the tunnels will be dug.
  • FIGS 8B and 8C illustrate an alternative implementation compensation devices.
  • deviated drilling 106 is carried out, 108 ... 110.
  • a drilling device is installed in each borehole compensation identical to that shown in Figure 2.
  • the inflatable bodies G are only provided in the area where the compensation is required.

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)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Saccharide Compounds (AREA)
EP01401636A 2001-06-25 2001-06-25 Verfahren und Anlage zum Ausgleichen von Grundsenkungen Expired - Lifetime EP1270825B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE60124886T DE60124886T2 (de) 2001-06-25 2001-06-25 Verfahren und Anlage zum Ausgleichen von Grundsenkungen
EP01401636A EP1270825B1 (de) 2001-06-25 2001-06-25 Verfahren und Anlage zum Ausgleichen von Grundsenkungen
AT01401636T ATE346990T1 (de) 2001-06-25 2001-06-25 Verfahren und anlage zum ausgleichen von grundsenkungen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01401636A EP1270825B1 (de) 2001-06-25 2001-06-25 Verfahren und Anlage zum Ausgleichen von Grundsenkungen

Publications (2)

Publication Number Publication Date
EP1270825A1 true EP1270825A1 (de) 2003-01-02
EP1270825B1 EP1270825B1 (de) 2006-11-29

Family

ID=8182775

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01401636A Expired - Lifetime EP1270825B1 (de) 2001-06-25 2001-06-25 Verfahren und Anlage zum Ausgleichen von Grundsenkungen

Country Status (3)

Country Link
EP (1) EP1270825B1 (de)
AT (1) ATE346990T1 (de)
DE (1) DE60124886T2 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR986619A (fr) * 1943-11-25 1951-08-02 Sondages Etanchements Dispositif de tubage pour l'équipement des trous et forages d'injection
FR2444873A1 (fr) * 1978-12-18 1980-07-18 Freyssinet Int Stup Dispositif de clapet ejectable pour tubes et ses applications a l'injection des sols avec des liquides durcissables
DE4210196A1 (de) * 1992-03-28 1993-09-30 Gerd Prof Dr Ing Gudehus Verfahren zum Verformungsausgleich im Untergrund durch Einpressen bodenschonender Pasten
EP0870898A1 (de) * 1997-04-09 1998-10-14 Soletanche Bachy France Verfahren zum Injizieren in eine wenig verformbare Formation und Manschette für dieses Verfahren

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR986619A (fr) * 1943-11-25 1951-08-02 Sondages Etanchements Dispositif de tubage pour l'équipement des trous et forages d'injection
FR2444873A1 (fr) * 1978-12-18 1980-07-18 Freyssinet Int Stup Dispositif de clapet ejectable pour tubes et ses applications a l'injection des sols avec des liquides durcissables
DE4210196A1 (de) * 1992-03-28 1993-09-30 Gerd Prof Dr Ing Gudehus Verfahren zum Verformungsausgleich im Untergrund durch Einpressen bodenschonender Pasten
EP0870898A1 (de) * 1997-04-09 1998-10-14 Soletanche Bachy France Verfahren zum Injizieren in eine wenig verformbare Formation und Manschette für dieses Verfahren

Also Published As

Publication number Publication date
DE60124886T2 (de) 2007-08-30
ATE346990T1 (de) 2006-12-15
DE60124886D1 (de) 2007-01-11
EP1270825B1 (de) 2006-11-29

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