EP1536069A1 - Procédée de stabiliser du sol pour fondations - Google Patents

Procédée de stabiliser du sol pour fondations Download PDF

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Publication number
EP1536069A1
EP1536069A1 EP03425756A EP03425756A EP1536069A1 EP 1536069 A1 EP1536069 A1 EP 1536069A1 EP 03425756 A EP03425756 A EP 03425756A EP 03425756 A EP03425756 A EP 03425756A EP 1536069 A1 EP1536069 A1 EP 1536069A1
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EP
European Patent Office
Prior art keywords
soil
injection
expanding
expanding substance
foundation soils
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
EP03425756A
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German (de)
English (en)
Other versions
EP1536069B1 (fr
Inventor
Renato Canteri
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.)
Uretek SRL
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Uretek SRL
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Filing date
Publication date
Application filed by Uretek SRL filed Critical Uretek SRL
Priority to DE60302904T priority Critical patent/DE60302904D1/de
Priority to AT03425756T priority patent/ATE313666T1/de
Priority to EP03425756A priority patent/EP1536069B1/fr
Priority to PT03425756T priority patent/PT1536069E/pt
Priority to ES03425756T priority patent/ES2255666T3/es
Priority to PCT/EP2004/012791 priority patent/WO2005054586A1/fr
Publication of EP1536069A1 publication Critical patent/EP1536069A1/fr
Application granted granted Critical
Publication of EP1536069B1 publication Critical patent/EP1536069B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/48—Foundations inserted underneath existing buildings or constructions

Definitions

  • the present invention relates to a method for consolidating foundation soils, which is also used for lifting civil building structures and artefacts of any kind (hereinafter globally indicated as buildings) by using expanding substances, in particular resins.
  • Such resins constituted by mixtures of polyols and MDI isocyanates were initially used to raise collapsed floors, for example as described in US Patent 4,567,708.
  • Said patent in particular discloses the use of expanding resins with the ability to expand in free air at least five times their initial volume, combined with a monitoring of the raising of the structure to be consolidated. According to the teaching of said patent, consolidation should be deemed to be achieved when the structure starts to rise.
  • the building is monitored by generally using a laser level and a millimetric sensor applied to the building structure to be consolidated.
  • the injection, both just below the foundation plane, and in depth, of the expanding resin by any method (i.e. both injecting into multiple, vertically distanced points and into an entire vertical hole obtained in the soil, as taught for example by the patent EP 851 064), but with the provision that the level of the overlying building must be constantly monitored, taking for granted that in the moment when the building starts to rise a consolidation level exceeding the minimum one required for this intervention has been obtained. It was deemed that when the dynamic thrust of the resin inside the soil discharged its power only upwards, and thus won over the force induced by the static load of the building, that was the moment when the underlying soil could be considered, with reasonable certainty, consolidated.
  • a first drawback is caused by the fact that the moment of consolidation is identified as the moment when the soil and/or the overlying building start to rise.
  • Such tests are normally conducted by sampling in two or three points, adjacent to the building to be consolidated. Considering that the composition of the soils can vary very rapidly even at short distances, it would be necessary to perform the tests in every injection point, which is a complicated operation, or even impossible in some cases, in addition to being highly onerous.
  • a technical task constituting the basis of the present invention is to provide a method for consolidating foundation soils that overcomes the aforementioned drawbacks.
  • a technical task of the present invention is to provide a method for consolidating foundation soils in which the achieved consolidation can be determined with greater certainty than in currently known consolidation methods.
  • Another technical task of the present invention is to provide a method for consolidating foundation soils that assures the duration of the consolidation intervention over time.
  • the method for consolidating foundation soils of the present invention comprises a first operating step in which a plurality of holes 1 is drilled in the soil 2 to be consolidated, appropriately distanced from each other, with a distance between centres, for example, of one metre.
  • the holes 1 are drilled in proximity to the foundations 4 thereof ( Figure 1).
  • Said holes 1 can be drilled both vertical and inclined relative to the vertical, in particular in such a way as to extend underneath the foundation plane.
  • the holes 1 involve the significant pressure bulb of the foundations 4, where the significant pressure bulb is the area of the soil underlying the foundation plane, involved by a pressure, exerted by the foundations 4 themselves, of significant value.
  • the significant pressure bulb is identified in a band of soil underlying the foundation plane, as wide as the base of the foundations 4 and twice as deep (starting from the foundations) as its width.
  • the injection may also involve the entire hole 1, which thus coincides with the injection point 5.
  • each injection point 5 is advantageously inserted into the hole 1 a tube 7 whose lower end is in correspondence with the injection point 5, and whose upper end 9 is accessible from the exterior by an operator 10.
  • the hole 1 must be drilled with sufficient diameter to allow the insertion of a number of tubes 7 equal to the number of injection points 5.
  • the minimum quantity of expanding substance 6 to be injected into each injection point 5 is determined according to the degree of humidity of the soil in correspondence with the related injection point 5, in consideration of the fact that as water content increases, soils become more prone to deformation and their resistance consequently decreases.
  • the measurement of the degree of humidity of the soil is obtained by measuring the electrical resistance of the soil itself, since there is a close correlation between the water content in the soil and its electrical resistance.
  • the tubes 7 for the injections which are usually made of copper or aluminium, both materials with good electrical conductivity.
  • each tube 7 are made of conducting material, in such a way as precisely to locate the measurement in the exact injection point 5.
  • the number of measurements taken may be adapted to the individual operative case. For instance, resistance may be measured in relation to a single injection point 5 for each hole 1.
  • the minimum quantity of expanding substance 6 to be injected depends on the characteristics of the expanding substance 6, in particular on its expansion capacity.
  • Table 1 shows the free air expansion coefficients of seven types of expanding substance 6, constituted by a resin of the type described below, generically designated with the letters A, B, C, D, E, F, and G.
  • RESIN TYPE A B C D E F G EXPANSION COEFFICIENT OF THE RESIN USED 4.8 4.6 4.4 4.2 4.0 3.5 3.0 DENSITY AFTER EXPANSION IN FREE AIR OF THE RESIN USED, kg/m 3 208 218 228 238 250 286 333
  • Table 2 instead shows the minimum quantity to be injected for each of the resins of Table 1, as a function of the electrical resistance of the soil (and hence of its degree of humidity).
  • the average data shown in this table refer to standard soils, such as clay or clay-silt soils with the presence of sand and/or gravel, with few cavities of limited size. Moreover, the table was determined for injection points 5 positioned at a distance of one metre from each other.
  • the table must be obtained empirically for each type of soil and each type of expanding substance 6, by means of field tests. In particular, it will be necessary to verify with appropriate tests whether for a given quantity of resin injected for each injection point 5 a good compaction is actually achieved or not (see also what is stated below about monitoring the soil level).
  • the minimum quantity of expanding substance 6 to be injected into each injection point 5 increases as the free air expansion capacity of the expanding substance 6 decreases, and as the electrical resistance of the soil
  • the operator 10 can start injecting the expanding substance 6 into the soil in correspondence with each injection point 5.
  • the method of the present invention also provides for the continuous monitoring of the level of the soil and/or of a building 3 bearing thereon to determine the rise of the soil itself, and for measuring the quantity of expanding substance 6 injected into the soil, and comparing said value with the value of the minimum quantity to be injected, determined for that injection point 5.
  • the injection is performed by the operator 10 by means of a gun 12 fed, through an injection pump (not shown), from a tank (not shown) of the expanding substance 6 (or from multiple tanks, through several pumps, when the expanding substance 6 is obtained by mixing two or more components in the injection point 5.
  • Both the injection pump and the conduits 13 which extend between the tank and the gun are appropriately heated to maintain the expanding substance 6 at the optimal temperature, in known ways.
  • the operator 10 can be provided with a display 14 enabling to view the values of the quantity of substance 6 injected and of the rise of the soil or of the building 3.
  • the injection of the expanding substance 6 is stopped when the injected quantity is at least equal to the minimum quantity, provided the soil and/or the building 3 bearing thereon have risen by a predetermined minimum value, which is usually no less than 1 mm.
  • the predetermined minimum value is not a constant, but must be determined for each intervention according to the extent of the required consolidation (this value in particular varies with the extent of the collapses of the soil which made the consolidation intervention necessary). Said minimum value can therefore vary also from one point to another in the same intervention.
  • the injection step is cancelled and a new injection point 5 for which the steps described heretofore are repeated.
  • Said new injection point can be selected in the same hole 1 at a different depth, in an extension thereof, or in a new hole 1 drilled in proximity thereto.
  • Said procedure may be repeated several times until an injection point 5 is identified for which a quantity of expanding substance 6 at least equal to the predetermined minimum quantity can be injected.
  • an expanding substance 6 is to be used which is able to expand its own volume in free air less than five times, and which consequently has, after free air expansion, a density of at least 200 kg per cubic metre.
  • said expanding substance 6 has an expansion coefficient of between three and five times.
  • said type of expanding substance 6 used has, after expansion in free air, a compression resistance of at least 5 kg per square centimetre, and preferably at least 9 kg per square centimetre, with deformation of less than 0.5%.
  • the expanding substance 6 is a resin which expands by means of a chemical reaction, and which is constituted by a mixture of two components, a polyol/polyether such as the polyol Eterol 317/X1 produced by the Company Polychem System, and an MDI based isocyanate, such as the MDI isocyanate Desmodur VKS 20 F produced by Bayer.
  • a polyol/polyether such as the polyol Eterol 317/X1 produced by the Company Polychem System
  • an MDI based isocyanate such as the MDI isocyanate Desmodur VKS 20 F produced by Bayer.
  • two or more expanding substances with different expanding capacity are injected into different injection points 5.
  • all expanding substances to be used will have an expansion coefficient lower than five.
  • each of said two superposed injection points 5 may be injected two different expanding substances 6, chosen in such a way that the expanding substance 6 injected into the deeper injection point 5 has greater expansion capacity than the expanding substance 6 injected into the less deep injection point 5.
  • the operating steps described above can be managed directly by an operator 10, or with the aid of a programmable electronic control unit which, for instance, can store the data relating to the electrical resistance of the soil determining for each point the minimum quantity of substance 6 to be injected, monitor soil level and the quantity of substance 6 injected and disable the dispensing of the substance 6 once the aforesaid conditions are met, or once the predetermined maximum value of rise is exceeded.
  • a programmable electronic control unit which, for instance, can store the data relating to the electrical resistance of the soil determining for each point the minimum quantity of substance 6 to be injected, monitor soil level and the quantity of substance 6 injected and disable the dispensing of the substance 6 once the aforesaid conditions are met, or once the predetermined maximum value of rise is exceeded.
  • the present invention thus achieves important advantages.
  • the method for consolidating foundation soils of the present invention assures the ability to determine with greater certainty than currently known consolidation methods the moment in which the soil can be deemed to be consolidated.
  • the present invention is relatively easy to implement and that the cost connected with the implementation of the invention is not very high, compared to industry standards.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Soil Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Soil Working Implements (AREA)
EP03425756A 2003-11-25 2003-11-25 Procédé de stabilisation du sol pour fondations Expired - Lifetime EP1536069B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE60302904T DE60302904D1 (de) 2003-11-25 2003-11-25 Verfahren zur Stabilisierung eines Baugrundes
AT03425756T ATE313666T1 (de) 2003-11-25 2003-11-25 Verfahren zur stabilisierung eines baugrundes
EP03425756A EP1536069B1 (fr) 2003-11-25 2003-11-25 Procédé de stabilisation du sol pour fondations
PT03425756T PT1536069E (pt) 2003-11-25 2003-11-25 Processo de consolidacao de solos para fundacoes
ES03425756T ES2255666T3 (es) 2003-11-25 2003-11-25 Metodo para consolidar terrenos de cimentacion.
PCT/EP2004/012791 WO2005054586A1 (fr) 2003-11-25 2004-11-11 Procede de consolidation de sol pour fondations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03425756A EP1536069B1 (fr) 2003-11-25 2003-11-25 Procédé de stabilisation du sol pour fondations

Publications (2)

Publication Number Publication Date
EP1536069A1 true EP1536069A1 (fr) 2005-06-01
EP1536069B1 EP1536069B1 (fr) 2005-12-21

Family

ID=34443156

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03425756A Expired - Lifetime EP1536069B1 (fr) 2003-11-25 2003-11-25 Procédé de stabilisation du sol pour fondations

Country Status (6)

Country Link
EP (1) EP1536069B1 (fr)
AT (1) ATE313666T1 (fr)
DE (1) DE60302904D1 (fr)
ES (1) ES2255666T3 (fr)
PT (1) PT1536069E (fr)
WO (1) WO2005054586A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007028534A1 (fr) * 2005-09-06 2007-03-15 Prematek Srl Procede et dispositif de consolidation de sols et de stabilisation de fondations
EP1914350A1 (fr) * 2006-10-13 2008-04-23 Geosec S.r.l. Procédée de homogeniser un sol par injections
WO2009063513A1 (fr) * 2007-11-16 2009-05-22 Renato Canteri Procédé pour la création d'un pilier de fondation
ITPR20080048A1 (it) * 2008-08-04 2010-02-05 Ve I Co Pal S R L Metodo di rilevamento e monitoraggio della fase di iniezione di un processo di consolidamento dei terreni o fondazioni o fabbricati.
WO2010059949A3 (fr) * 2008-11-21 2010-09-23 Uretek Usa, Inc. Procédé et dispositif de mesure de pression souterraine
EP2543769A1 (fr) 2011-07-07 2013-01-09 GEOSEC s.r.l. Procédé de consolidation de sols de fondation et/ou des sites de construction
EP2746363A1 (fr) 2012-12-21 2014-06-25 Ilario Bridi Procédé de renforcement de côtes sableuses
KR101665377B1 (ko) 2015-09-24 2016-10-12 문형록 지반보강용 발포 조성물 및 이를 이용한 지반보강 시공방법
ITUB20152280A1 (it) * 2015-07-17 2017-01-17 Thur Srl Procedimento per migliorare le caratteristiche meccaniche e idrauliche di terreni di fondazione di manufatti esistenti.
WO2017013014A1 (fr) * 2015-07-17 2017-01-26 Thur S.R.L. Procédé d'amélioration des caractéristiques mécaniques et hydrauliques de terrains de fondation de structures construites existantes
KR20190048097A (ko) 2017-10-30 2019-05-09 주식회사 골든포우 지반함몰지 응급복구용 팽창매트
WO2019114998A1 (fr) * 2017-12-15 2019-06-20 Redrock Ventures B.V. Procédé de commande de technique d'injection de résine expansive
US10760236B2 (en) 2017-12-15 2020-09-01 Redrock Ventures B.V. System and method for real-time displacement control using expansive grouting techniques

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2343055B1 (es) * 2009-01-20 2011-06-06 Alberto Gonzalo Carracedo Procedimiento de reparacion de cimentaciones de aerogeneradores.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135721A (en) * 1983-03-03 1984-09-05 Gkn Keller Gmbh A soil treatment process
US4567708A (en) * 1982-09-27 1986-02-04 Veikko Haekkinen Method for levelling sunken or broken portions of earth-supported floors and slabs
EP0851064A1 (fr) * 1996-12-02 1998-07-01 Uretek S.r.l. Procédé pour accroítre la force portante d'un sol de fondation d'immeubles
DE19842072C1 (de) * 1998-09-15 1999-10-28 Martin Schoenberger Verfahren zur Abdichtung und/oder Verfestigung von Bodenbereichen im Tiefbau
US6521673B1 (en) * 1999-11-03 2003-02-18 Polythane Systems, Inc. Composition and method for preparing polyurethanes and polyurethane foams

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3663077B2 (ja) * 1999-05-11 2005-06-22 株式会社日東テクノ・グループ コンパクショングラウチング施工管理方法及びシステム

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567708A (en) * 1982-09-27 1986-02-04 Veikko Haekkinen Method for levelling sunken or broken portions of earth-supported floors and slabs
GB2135721A (en) * 1983-03-03 1984-09-05 Gkn Keller Gmbh A soil treatment process
EP0851064A1 (fr) * 1996-12-02 1998-07-01 Uretek S.r.l. Procédé pour accroítre la force portante d'un sol de fondation d'immeubles
DE19842072C1 (de) * 1998-09-15 1999-10-28 Martin Schoenberger Verfahren zur Abdichtung und/oder Verfestigung von Bodenbereichen im Tiefbau
US6521673B1 (en) * 1999-11-03 2003-02-18 Polythane Systems, Inc. Composition and method for preparing polyurethanes and polyurethane foams

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007028534A1 (fr) * 2005-09-06 2007-03-15 Prematek Srl Procede et dispositif de consolidation de sols et de stabilisation de fondations
EP1914350A1 (fr) * 2006-10-13 2008-04-23 Geosec S.r.l. Procédée de homogeniser un sol par injections
WO2009063513A1 (fr) * 2007-11-16 2009-05-22 Renato Canteri Procédé pour la création d'un pilier de fondation
ITPR20080048A1 (it) * 2008-08-04 2010-02-05 Ve I Co Pal S R L Metodo di rilevamento e monitoraggio della fase di iniezione di un processo di consolidamento dei terreni o fondazioni o fabbricati.
US9284707B2 (en) 2008-11-21 2016-03-15 Uretek Usa, Inc. Measuring underground pressure
US8690486B2 (en) 2008-11-21 2014-04-08 Uretek Usa, Inc. Method and device for measuring underground pressure
WO2010059949A3 (fr) * 2008-11-21 2010-09-23 Uretek Usa, Inc. Procédé et dispositif de mesure de pression souterraine
EP3029204A3 (fr) * 2008-11-21 2016-07-27 Uretek USA, Inc. Procédé et dispositif de mesure de stabilisation de sol souterrain
EP2543769A1 (fr) 2011-07-07 2013-01-09 GEOSEC s.r.l. Procédé de consolidation de sols de fondation et/ou des sites de construction
EP2746363A1 (fr) 2012-12-21 2014-06-25 Ilario Bridi Procédé de renforcement de côtes sableuses
ITUB20152280A1 (it) * 2015-07-17 2017-01-17 Thur Srl Procedimento per migliorare le caratteristiche meccaniche e idrauliche di terreni di fondazione di manufatti esistenti.
WO2017013014A1 (fr) * 2015-07-17 2017-01-26 Thur S.R.L. Procédé d'amélioration des caractéristiques mécaniques et hydrauliques de terrains de fondation de structures construites existantes
KR101665377B1 (ko) 2015-09-24 2016-10-12 문형록 지반보강용 발포 조성물 및 이를 이용한 지반보강 시공방법
KR20190048097A (ko) 2017-10-30 2019-05-09 주식회사 골든포우 지반함몰지 응급복구용 팽창매트
WO2019114998A1 (fr) * 2017-12-15 2019-06-20 Redrock Ventures B.V. Procédé de commande de technique d'injection de résine expansive
US10760236B2 (en) 2017-12-15 2020-09-01 Redrock Ventures B.V. System and method for real-time displacement control using expansive grouting techniques
CN111684043A (zh) * 2017-12-15 2020-09-18 红石冒险有限公司 利用膨胀灌浆技术进行实时位移控制的系统和方法

Also Published As

Publication number Publication date
EP1536069B1 (fr) 2005-12-21
ES2255666T3 (es) 2006-07-01
ATE313666T1 (de) 2006-01-15
DE60302904D1 (de) 2006-01-26
PT1536069E (pt) 2006-05-31
WO2005054586A1 (fr) 2005-06-16

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