EP2373848A1 - Système commandé pour la densification de sols faibles - Google Patents

Système commandé pour la densification de sols faibles

Info

Publication number
EP2373848A1
EP2373848A1 EP09835934A EP09835934A EP2373848A1 EP 2373848 A1 EP2373848 A1 EP 2373848A1 EP 09835934 A EP09835934 A EP 09835934A EP 09835934 A EP09835934 A EP 09835934A EP 2373848 A1 EP2373848 A1 EP 2373848A1
Authority
EP
European Patent Office
Prior art keywords
bag
earth
ground surface
weak
polymeric resin
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.)
Withdrawn
Application number
EP09835934A
Other languages
German (de)
English (en)
Other versions
EP2373848A4 (fr
Inventor
Casey Moroschan
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2373848A1 publication Critical patent/EP2373848A1/fr
Publication of EP2373848A4 publication Critical patent/EP2373848A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/02—Internal fittings
    • B65D25/04—Partitions
    • B65D25/08—Partitions with provisions for removing or destroying, e.g. to facilitate mixing of contents
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/32—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging two or more different materials which must be maintained separate prior to use in admixture
    • B65D81/3205—Separate rigid or semi-rigid containers joined to each other at their external surfaces
    • B65D81/3211—Separate rigid or semi-rigid containers joined to each other at their external surfaces coaxially and provided with means facilitating admixture
    • 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

Definitions

  • This document relates to controlled systems for the densification of weak soils, and more specifically to a bag system for densifying weak soils in a controlled fashion
  • a traditional method of densifying base soils involves forcing a high density cementitious material under high pressure into the base soils with a view to increase the bearing capacity of the soils
  • pressure grouting or permeation grouting involves forcing a high density cementitious material under high pressure into the base soils with a view to increase the bearing capacity of the soils
  • extreme amounts of grout can be pressure pumped into the soils with limited or no positive results This is especially true in the case of highly saturated soils
  • An alternative method of densifying soils is the injection of expanding polymer resins directly into the base soils, as for example described in EP 0 851 064 Al This typically works when the soils are relatively strong but in the case of weak to very weak soils that are saturated, enormous amounts of expanding polymer resin are required which once again makes it uneconomical due to the lack of control as to where the resins are expanding to
  • Another alternative method of densifying weak soils involves driving a preformed member made of wood, or any other strong material, into the soils, densifying the soil through the displacement of the soil by the driven member
  • a method of imparting strength to earth in support of a ground surface is disclosed
  • a bag is placed in the earth under the ground surface, the bag having a first end oriented towards the ground surface, a second end opposite the first end, and a cross sectional contour from the first end to the second end that includes at least one wedge portion extendable laterally into surrounding earth located above and below the wedge portion when the bag is filled
  • Expandable polymeric resin is injected into the bag to at least partially fill the bag to compress earth around the bag
  • a bag for use in imparting strength to earth in support of a ground surface
  • the bag comprises at least an opening, a first end and a second end opposed the first end, and a cross sectional contour from the first end to the second end that includes at least one wedge portion extendable laterally into surrounding earth above and below the wedge portion when the bag is filled and in earth under the ground surface
  • a method of imparting strength to earth in support of a ground surface is also disclosed A first bag and a second bag are placed in the earth under the ground spaced along an injector inserted through the second bag and into the first bag Expandable polymeric resin is injected into the first bag from an injection end of the injector, such as an injection tube, to compress the earth around the first bag The injection end is removed from the first bag and expandable polymeric resin injected into the second bag from the injection end to compress the earth around the second bag The injector is removed from the second bag
  • the method further comprises drilling a hole in the earth with a hollow drill stem connected to a sacri
  • a method of densifying weak earth at least partially saturated with water and in support of a ground surface is also disclosed
  • a first bag is placed in the weak earth below a first location of the ground surface and expandable polymeric resin injected to at least partially fill the first bag and to compress weak earth around the first bag
  • a second bag is placed in the weak earth below a second location of the ground surface and expandable polymeric resin injected to at least partially fill the second bag and to compress weak earth around the second bag
  • a third bag is placed in the weak earth below a third location of the ground surface in between the first location and the second location and expandable polymeric resin is injected to at least partially fill the third bag and to compress weak earth around the third bag
  • a further method involves inserting a bag or an array of bags of predetermined shape and size into a pre-drilled hole to a predetermined depth, air filling the bag or bags to allow for free flow of an expanding polymeric resin thereby allowing the expanding resin to be confined yet allowing the expanding confinement bag to compact, compress and densify the soils in proximity to the confinement bag(s) to increase bearing capacity of soils beneath foundation support systems
  • a geotechnical survey is carried out on weak soils to determine a profile of soil weakness
  • a bag or stack of bags is then placed in the weak soils and injected with an expanding polymeric resin to compress the weak soils around the bag or stack of bags
  • the bag or stack of bags is selected to have a shape that conforms to the soil weakness profile such that a portion of the bag or stack of bags placed in a weaker layer of the weak soils has a greater diameter than another portion of the bag or stack of bags placed in a stronger layer of the weak soils
  • the portions of the bags or bags having the greater diameter may provide a bridge between stronger layers of soil The portions with greater diameter thus form wedges that provide the bridging function
  • a bag for use in imparting strength to earth in support of a ground surface comprising at least an opening, a first end and a base end opposed the first end, and a cross sectional contour from the base end to the first end, at least a portion of the cross sectional contour being configured to taper conically outwards from the base end when the bag is filled
  • a method of imparting strength to earth in support of a ground surface is also disclosed, the method comprising placing a bag in the earth under the ground surface, the bag having a base end, a first end opposite the base end, and a cross sectional contour from the base end to the first end, at least a portion of the cross sectional contour being configured to taper conically outwards from the base end when the bag is filled, and injecting expandable polymeric resin into the bag to at least partially fill the bag to compress earth around the bag
  • FIGs 1-5 are side elevation views, in section and not to scale, of earth under a ground surface and illustrating a process forming a support stack of plural bags in earth under a ground surface
  • Fig 6 is a perspective view, partially in section and not to scale, that illustrates an opening in a bag housing a back-flow prevention valve
  • Fig 7 is a side elevation view, in section and not to scale, of earth under a ground surface containing a support stack of four bags
  • Figs 8-9 are perspective views, in section and not to scale, of earth under a ground surface and illustrating a method of placing support stacks of at least one bag
  • Figs 10-11 are side elevation views, in section and not to scale, that illustrate a further method of placing support stacks of at least one bag
  • Fig 12 is a side elevation view, in section and not to scale, that illustrates an embodiment of a support stack with two bags, in which one bag has an hourglass cross section, and the other bag has a bulged midsection, as well as a soil weakness profile of the soil of illustrated
  • Figs 13-15 are flow diagrams that illustrate various methods of imparting strength to earth under a ground surface
  • Fig 16 is a flow diagram that illustrates a method of densifying weak earth at least partially saturated with water and in support of a ground surface
  • Figs 17A and 17B are side elevation views, in section and not to scale, that illustrate the placement and filling, respectively, of a bag in the earth
  • Figs 18-19 are side elevation views, in section and not to scale, that illustrate the formation of a support stack of bags
  • Fig 20 is a side elevation view, in section and not to scale, that illustrates the first and second bags from Fig 18 fully filled out of the ground
  • Fig 21 is a perspective view, in section and not to scale, that illustrates a bag with an annular wedge portion
  • Fig 22 is a perspective view, in section and not to scale, that illustrates a bag with an arm
  • Fig 23 is a flow diagram that illustrates a method of imparting strength to weak soils in support of a ground surface
  • Fig 24A is a side elevation, in section, of a bag with a conically outwards taper
  • Fig 24B is a side elevation view, in section, of a bag with an inwardly tapered base
  • Fig 25 is a flow diagram that illustrates a method of imparting strength to earth in support of a ground surface
  • the present disclosure is directed to providing a controlled method of densifying soils at depth to increase bearing capacity of the weak soils as an alternative to pressure grouting and to direct injection of expanding polymer resins into weak base soils
  • Weak alluvial soils and silts replete with peat, hog fuel, and other weak sediments that may be highly saturated and demonstrative of Standard Penetration Test N-values of 5 or lower are examples of soils that this disclosure relates to
  • Bag 10 is illustrated for use in imparting strength to earth 14 in support of a ground surface 16
  • Bag 10 may be made of non-expandible material, for example thick polymer material
  • the material may resist the expansion of the bag itself, thus compressing the inside and outside of the bag while maintaining staictural integrity
  • the bag is made of resilient material
  • Bag 10 may be filled underground with an expandable polymeric resin that fills bag 10 to compress and densify the adjacent earth
  • the expandable polymeric resin reacts to expand and fill bag 10, compressing and densifying as it does so
  • bag 10 has at least an opening 24 through which an injector, such as an injection tube 18 (shown in Fig 2), is inserted to dispense the expandable polymeric resin It should be understood that the injector, such as an injection tube 18 (shown in Fig 2), is inserted to dispense the expandable polymeric resin
  • a method of imparting strength to earth in support of a ground surface is illustrated Referring to Fig 2, in a stage 100 (shown in Fig 13), a first bag 10 and a second bag 12 are placed in the earth 14 under the ground 16 spaced along an injector, such as injection tube 18, inserted through the second bag 12 and into the first bag 10
  • the injection tube 18 may be inserted through the second bag 12 through openings 20, 22, and into first bag 10 through opening 24
  • the bags 10, 12 may form an array of non- identical containment bags vertically placed one on top of each other to the appropriate depth
  • Non-identical refers to the fact that the bags may have different potential shapes and volumes Bags 10, 12, and injection tube 18 may be placed in the earth 14 through a hole 34
  • hole 34 is drilled Hole 34 may be drilled by a conventional means, in which the drilling device (not shown) is removed upon completion of the hole and prior to placement of bags 10, 12, and tube 18 In other embodiments, hole 34 may be drilled in the
  • opening 24 of first bag 10 may comprise a backflow prevention valve 40 Valve 40 may be provided to prevent material contained within the bag 10 from flowing out of the bag 10 when the opening 24 is unobstructed Valve 40 allows the injection tube to be threaded through, but once the injection tube 18 has been removed the valve will close and not allow expandable polymeric resin to escape from the containment bag Valve 40 is sized to accept the passage of injection tube 18 Normally, valve 40 may be biased to close opening 24, unless tube 18 is extending through opening 24 Valve 40 is illustrated in Fig 6, and described in detail below Referring to Fig 5, once tube 18 is
  • first bag 10 and second bag 12 are connected Bags 10 and 12 may be connected, for example via a sleeve 46, for further example a polymer connector Injection probe 18 (not shown) may be passed through bags 10, 12 through sleeve 46 In such embodiments, it may only be necessary to provide one backflow prevention valve on sleeve 46 Referring to Fig 6, sleeve 46 may be initially affixed to at least one of bags 10, 12, in this case the bag 10 Referring to Fig 24A, sle
  • the method illustrated in Fig 15 is particularly useful for densifying particularly narrow strata of weak soil, such as layer 48 in Fig 12 Because a weak layer may be short enough vertically that a bag positioned within such a layer will extend beyond the layer as illustrated, this method allows a portion of the bag to be modified to target the small weak layer and provide more compression to it
  • the wedge portion 64 is oriented in a first strata 48 of earth 14 over a second strata 68, the first strata 48 of earth being weaker than the second strata 68
  • This method allows a bag 10 to ledge over and be shouldered by an underlying layer of earth
  • wedge portion 64 effectively sits over earth layer 68, which is stronger and denser than layer 48 Referring to Fig 12, this may also be illustrated as bag 12 may have an hourglass cross sectional contour 66 from the first end 58 to the second end 60
  • wedge portion 64 comprises a sloped ledge 71
  • the bag may also have at least two wedge
  • placing the bag in the earth under the ground surface may further comprise placing the bag 12 in the earth 14 with an injector, such as an injection tube (not shown), inserted through an opening (not shown) of the bag 12, and in injecting may further comprise injecting expandable polymeric resin into the bag from an injection end of the injection tube This is illustrated in the embodiments shown in Fig 4 for example Similarly, the injection end may be removed from the bag
  • the bag 10 may further comprises a backflow prevention valve 40 to prevent material contained within the bag 10 from passing out of the bag 10 when the opening 24 is unobstaicted Valved opening 24 may comprise a rigid flange 41
  • a staictural support 74 for a ground surface 16 comprising the confinement bag 12 located in earth 14 under the ground surface 16 and at least partially filled with the expandable polymeric resin 25 to compress the earth 14 around the bag 10
  • a bag 12 having an opening 24, a first end 58 and a base end 59 (for example second end 60) opposed the first end 58, and a cross sectional contour 62 from the base end 59 to the first end 58, at least a portion of the cross sectional contour 62 being configured to taper when the bag 12 is filled
  • the taper may be frusto-conical
  • a portion of the cross sectional contour 62 (illustrated for bag 10B) is configured to taper conically outwards with increasing distance from the base, for example from base end 59
  • Fig 17B illustrates a conical bag 10 similar to bag 1OB, but with the entire cross sectional contour 62 tapered conically outwards from the base
  • Fig 24A a further embodiment of this is illustrated, with the conically-tapered portion 87 spaced from the base end 59 The conically outwards
  • a hole 34 may be initially drilled in earth 14 with a hollow drill stem 36 connected to a sacrificial drill bit 38
  • the injection tube 18, along with at least one of the first bag 10, and second bag 12 are placed in the hollow drill stem 36 under the ground surface 16
  • the hollow drill stem may be required to prevent the drilled hole from collapsing prior to placement of the bags
  • the hollow drill stem 36 (shown in Fig 2) is at least removed from over the first bag 10 prior to injection of the first bag 10
  • the hollow drill stem 36 is completely removed at this stage
  • the hollow drill stem 36 may be removed enough to clear each bag one at a time as the cleared bag has expandable polymeric resin injected into it
  • a method of densifying weak earth at least partially saturated with water and in support of a ground surface is detailed Referring to Figs 10-11, this is illustrated Referring to Fig 10, in stage 120 (shown in Fig 16), a first bag 74 is placed in the weak earth below a first location 76 of the ground surface 16 and expandable polymeric resin 25 is injected to at least partially fill the first bag 74 and to compress weak earth around the first bag 74 In stage 122, a second bag 78 is placed in the weak earth below a second location 80 of the ground surface 16 and expandable polymeric resin 25 is injected to at least partially fill the second bag 78 and to compress weak earth around the second bag 78 A pre-determined amount of time is then elapsed to allow the compression from first bag 74 and the second bag 78 to at least partially drive out water 82 from weak earth between the first bag 74 and the second bag 78 Referring to Fig 11, in stage 124 (shown in Fig 16), after the pre-determined amount of
  • a fifth bag 94 is placed in the weak earth below a fifth location 96 of the ground surface 16 and expandable polymeric resin 25 is injected to at least partially fill the fifth bag 94 and to compress weak earth around the fifth bag 94
  • the fifth bag 94 acts to at least partially drive out water 82 from weak earth between the first bag 74, the second bag 78, the fourth bag 90, and the fifth bag 94 during the pre-determined amount of time
  • the third position 86 is in between the first position 76, second position 80, fourth position 92 and fifth position 96
  • a grid of bags may be placed to drive out water from in between prior to placement of the final bag
  • the final bag acts to further drive out water from in between the final bag and the prior placed bags, thus drying the soil at least in part and imparting strength to the soil
  • the separation of the bags may be the same as the separation between the first and second bags
  • the expansion rate of the freely blown polymeric resin system is known as is the approximate relationship of the expanding polymeric resin system under confinement in a weak soils condition and hence the amount of resin can be pre-estimated to minimize resin usage and maximize soils densification around the confinement bag or array of confinement bags
  • the shape and size of containment bags will be determined depending upon the soils conditions The weaker the soil's condition, the larger the containment bag may be in both width and depth
  • the containment bags will typically not be symmetrical in shape to enhance the stability of the filled bag in the weak soils as well as enhance any "friction" effect the containment bag may have
  • the containment bags may be designed to meet specific soils needs, for example using a containment bag in a specifically weak soil strata that has been designed to more so compact the weak soil as compared to the soils above and below the weak strata
  • various placements of bags as support stacks may be employed
  • the grid for placement of the expanding stabilization members for densifying soils under any structure will depend upon the structure and the weakness of the soils, and to what depth the weak soils exist at For example, for densifying soils beneath a railroad track a typical grid may be a staggered grid pattern under each track at four
  • the diameter of the drill stem 36 and the sacrificial drill head 38 may be variable in dimension Referring to Fig 2, in that the drill head will be sacrificed (left at the bottom of the hole), the bag or array of bags complete with injection tube can be inserted into the vacant drill stem and then the drill stem removed leaving the bag or array of bags in the weak soils
  • the expandable polymeric resin used may be an expandable polymeric resin
  • a positive benefit of this is that expanding polymeric resin systems set up extremely quickly and allow for immediate use of the structure shortly after completion of the soils densification
  • the containment bags may aipture, this should not materially effect the densification of the soils around the containment bag because of the rapidity with which the resins set up
  • the pre-determined amount of expandable polymeric resin 25 may be selected to rupture the bag 10 Rupturing forms one or more resin pockets 27 that extend from bag 10 and help to stabilize the array in soil
  • a further positive benefit of the foam bag containment system used to densify weak base soils is that the expanding polymer resin is light weight, for example in the range of 300 lbs per cubic meter
  • the use of expandable polymeric resin does not contribute a severe weight or over-burden effect on the weak soils being densified
  • water permeation is not a consideration This is a significant factor in the event the containment bag splits and the weak soils being treated are saturated, since such ruptured supports will not lose their function, namely to compress and compact the adjacent soils
  • the first bag and second bag are injected with expandable polymeric resin until full
  • any number of bags may be used with the methods disclosed herein, for example four bags 10A-D as illustrated Referring to Fig 12, the methods disclosed herein may be used to strengthen earth 14 in support of a railroad track 97 on ground surface 16 As illustrated, the bags may be placed adjacent the railroad track 97, in order to not disturb the track itself In other embodiments, a hole may be drilled directly underneath the tracks 97, and the bag or bags inserted through the hole and injected Thus, the methods disclosed herein may be carried out with minimal obstaiction to surface activities
  • a geotechnical survey is carried out on weak soils to determine a pattern or profile of soil weakness
  • an exemplary profile 131 is indicated of the soil weakness of the soils of Fig 12
  • the profile 131 illustrates the relative weakness of the soil, which may be plotted using for example negative N-values obtained at spaced intervals below the surface 16
  • region 132 corresponds to layer 48, indicating a weak region or layer of soil relative to the surrounding regions 134 and 136
  • a bag or stack of bags for example bags 10, 12
  • the bag or stack of bags is selected to have a shape that conforms to the soil weakness profile 131, such that a portion of the bag or stack of bags placed in a weaker layer of the weak soils has a greater diameter than another portion of the bag or stack of bags placed in a stronger layer of the weak soils
  • bag 10 is selected
  • Some methods disclosed herein relate to the use of pre-designed containment bags dependent upon geo-technical data received on the weak soils to be treated
  • the containment elements will be irregular in shape to more effectively densify the weak soils and also to provide additional vertical strength to the ground surface
  • the word “comprising” is used in its inclusive sense and does not exclude other elements being present
  • the indefinite article "a" before a claim feature does not exclude more than one of the feature being present
  • Each one of the individual features described here may be used in one or more embodiments and is not, by virtue only of being described here, to be constaied as essential to all embodiments as defined by the claims

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Agronomy & Crop Science (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Road Paving Structures (AREA)

Abstract

L'invention porte sur un procédé pour communiquer une robustesse à de la terre pour le support d'une surface de sol. Un sac est disposé dans la terre sous la surface de sol, le sac comprenant une première extrémité orientée vers la surface de sol, une seconde extrémité opposée à la première extrémité, et ayant un contour de section transversale de la première extrémité à la seconde extrémité qui comprend au moins une partie de coin pouvant s'étendre latéralement dans la terre environnante située au-dessus et en dessous de la partie de coin lorsque le sac est rempli. Une résine polymère pouvant subir une expansion est injectée dans le sac pour remplir au moins partiellement le sac afin de comprimer la terre autour du sac. La résine polymère pouvant subir une expansion peut être une résine polymère pouvant subir une expansion. L'invention porte également sur un sac destiné à être utilisé pour communiquer une robustesse à de la terre pour le support d'une surface de sol. Le sac comprend au moins une ouverture, une première extrémité et une seconde extrémité opposée à la première extrémité, et a un contour de section transversale de la première extrémité à la seconde extrémité qui comprend au moins une partie de coin pouvant s'étendre latéralement dans la terre environnante au-dessus et en dessous de la partie de coin lorsque le sac est rempli et dans la terre sous la surface de sol.
EP09835934.2A 2009-01-02 2009-12-24 Système commandé pour la densification de sols faibles Withdrawn EP2373848A4 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CA2648820A CA2648820A1 (fr) 2009-01-02 2009-01-02 Systeme controle pour la densification des sols mous
US35068309A 2009-01-08 2009-01-08
US16050309P 2009-03-16 2009-03-16
PCT/CA2009/001872 WO2010075630A1 (fr) 2009-01-02 2009-12-24 Système commandé pour la densification de sols faibles

Publications (2)

Publication Number Publication Date
EP2373848A1 true EP2373848A1 (fr) 2011-10-12
EP2373848A4 EP2373848A4 (fr) 2015-09-09

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Family Applications (1)

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EP09835934.2A Withdrawn EP2373848A4 (fr) 2009-01-02 2009-12-24 Système commandé pour la densification de sols faibles

Country Status (4)

Country Link
US (2) US20110280669A1 (fr)
EP (1) EP2373848A4 (fr)
CA (2) CA2648820A1 (fr)
WO (1) WO2010075630A1 (fr)

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WO2019055014A1 (fr) * 2017-09-14 2019-03-21 Polymer Technologies Worldwide, Inc. Système et procédé de stabilisation des sols
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CN112942307B (zh) * 2021-01-27 2022-10-25 山东大学 一种松散土层注浆加固方法及滨海岩溶区注浆加固方法
CN113216147B (zh) * 2021-05-11 2023-02-24 中国科学院武汉岩土力学研究所 一种软岩路基纵向裂缝病害处治方法
CN113684812B (zh) * 2021-08-31 2022-08-19 湖北德润诚达建筑工程有限公司 一种适用于地基施工的堆载预压件辅助运输装置
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US20110280669A1 (en) 2011-11-17
CA2748049A1 (fr) 2010-07-08
CA2748049C (fr) 2017-11-07
US20150016897A1 (en) 2015-01-15
EP2373848A4 (fr) 2015-09-09
CA2648820A1 (fr) 2010-07-02
WO2010075630A1 (fr) 2010-07-08

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