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EP2815032A1 - Levage d'une structure - Google Patents

Levage d'une structure

Info

Publication number
EP2815032A1
EP2815032A1 EP13744134.1A EP13744134A EP2815032A1 EP 2815032 A1 EP2815032 A1 EP 2815032A1 EP 13744134 A EP13744134 A EP 13744134A EP 2815032 A1 EP2815032 A1 EP 2815032A1
Authority
EP
European Patent Office
Prior art keywords
supporting bar
hollow pipe
lifting
bag
polymer
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Withdrawn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
EP13744134.1A
Other languages
German (de)
English (en)
Other versions
EP2815032A4 (fr
Inventor
Sami HÄKKINEN
Antti PERÄLÄ
Tuomas Lievonen
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 Worldwide Oy
Original Assignee
Uretek Worldwide Oy
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 Uretek Worldwide Oy filed Critical Uretek Worldwide Oy
Publication of EP2815032A1 publication Critical patent/EP2815032A1/fr
Publication of EP2815032A4 publication Critical patent/EP2815032A4/fr
Withdrawn legal-status Critical Current

Links

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
    • E02D35/005—Lowering or lifting of foundation structures
    • 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

  • the invention relates to a method for lifting a structure.
  • the invention relates to an arrangement for lifting a structure.
  • Arranging a jack or support structure under the structure to be lifted thus requires excavation work under the structure to be lifted. Further, if the jack is arranged next to the structure to be lifted, the structure to be lifted is subjected to an asymmetric lifting force. Solutions for lifting a structure by means of jacks are disclosed in publications US 2010/0226725, JP 2000144783 and US 2002/0176749, for example.
  • the method according to the invention is characterized by arranging a hollow pipe at the lifting point of the structure to be lifted; generating a bond between the hollow pipe and the structure to be lifted by injecting polymer to the outside of the hollow pipe; arranging a supporting bar in connection with the hollow pipe, which bar is arranged in the ground such that it is in the ground in a substantially non-subsidable manner; and lifting the hollow pipe and the structure attached to it via said bond in relation to the supporting bar and such that they are supported against the supporting bar.
  • the arrangement according to the invention is characterized in that the arrangement comprises a hollow pipe arranged in connection with the structure to be lifted; a bag which is arranged outside the pipe and into which polymer is injectable to cause the bag to be supported against the structure to be lifted; a supporting bar which is arranged in connection with the hollow pipe and arrangeable in the ground such that it is in the ground in a substantially non-subsidable manner; and lifting means for lifting the hollow pipe and the structure supported against it via the bag in relation to the supporting bar and such that they are supported against the supporting bar.
  • a hollow pipe is arranged at the lifting point of the structure to be lifted. Between the hollow pipe and the structure to be lifted, a bond is generated by injecting polymer to the outside of the pipe.
  • a supporting bar is arranged, being positioned in the ground such that it is there in a substantially non- subsidable manner.
  • the hollow pipe and the structure attached to it via said bond are lifted in relation to the supporting bar and such that they are supported against the supporting bar.
  • the lifting can be implemented simply and controllably. Further, the lifting force can be directed at the structure to be lifted in a reliable manner.
  • a bag is arranged outside the pipe, said polymer being injected into this bag.
  • the bag allows the polymer to be applied substantially evenly around the pipe, whereby the effect of the lifting force on the structure is transmitted substantially symmetrically.
  • the wall of the bag is partially polymer permeable. This improves the bond with the ground outside and to the structure to be lifted.
  • Figures 1 , 2, 3, 4 and 5 show schematically cross-sectional side views of different stages of an embodiment of lifting a structure
  • Figure 6 shows schematically one way of injecting polymer into a bag
  • Figures 7, 8, 9, 10 and 11 show schematically cross-sectional side views of different stages of a second embodiment of lifting a structure
  • Figure 12 shows schematically a partially cross-sectional side view of a lifting means
  • Figure 13 shows schematically a cross-sectional side view of another lifting means.
  • Figure 1 shows a construction 1 representing a structure to be lifted, liftable by means of the present solution.
  • Figures 1 to 5 only show the foundation of the construction 1.
  • the construction 1 is positioned in the ground 2, which is of the type where the construction 1 has subsided downwards. Thus, there is a need to lift the construction 1 upwards.
  • a hole 3 is first formed in the structure to be lifted and in the ground.
  • a hollow pipe 4 is installed in the hole 3. Outside the pipe 4, a bag 5 is arranged twined or folded.
  • the wall of the bag 5 is of geotextile or other suitable textile, and it is fastened outside the hollow pipe 4 by means of fasteners 6.
  • an injecting tube 7, which extends to the inside of the bag 5, between the hollow pipe 4 and the bag 5.
  • injecting means 8 are used to inject polymer 9 along the injecting tube 7 to the inside of the bag 5.
  • the polymer 9 fills the bag 5 in such a way that the outer diameter of the bag 5 increases.
  • part of the polymer 9 permeates the wall of the bag.
  • the bag 5 may thus be arranged below the structure to be lifted.
  • the bag 5 may also be arranged at least partially inside the structure to be lifted. In such a case, when the bag 5 expands while the polymer 9 is filling it, the bag 5 is supported against the structure to be lifted also in the lateral direction.
  • the polymer 9 adheres firmly to the outer surface of the pipe 4. Adhesion of the polymer 9 to the outer surface of the hollow pipe 4 may still be improved by shaping the outer surface of the pipe 4 uneven or rough, for instance by sandblasting.
  • the adhesion between the polymer 9 and the hollow pipe 4 is 0.5 MPa or more. Further, the adhesion between the polymer 9 and the hollow pipe 4 may be, for example, 0.5 to 30 MPa.
  • a supporting bar 10 is arranged through the hollow pipe 4.
  • the supporting bar 10 is arranged in such a way that it does not substantially subside downwards in the ground 2.
  • the supporting bar 10 may be arranged as far as to a firm horizon 2a of the ground, for instance.
  • the firm horizon 2a may be, for example, bedrock.
  • An actuator 11 is arranged at the upper end of the hollow pipe, around the supporting bar 10.
  • the body of the actuator 11 is immovably attached to the hollow pipe 4.
  • the actuator 1 is preferably hollow on the inside in such a way that the supporting bar 10 goes in the middle of the actuator 11.
  • the end of a piston 11a in the actuator 11 is provided with attaching means with which the actuator 11 can be attached to the supporting bar 10.
  • the attaching means may be formed by what is called a bell frame 2, for instance, which is provided with a ball clamp 13.
  • An empty space 4 formed under the lifted structure may be filled with a suitable filling material.
  • suitable filling material may be, for example, concrete or polymer or other corresponding suitable filling material. If required, lifting of the structure may subsequently be continued in such a way that the piston 11a of the actuator 11 is lifted upwards and, at the same time, the attaching means are lifted upwards on the supporting bar 10. After this, lifting of the structure can be continued again with the actuator 11.
  • the supporting bar 10 can be lifted off.
  • the hollow pipe may be plugged.
  • the supporting bar 10 can be reinstalled through the hollow pipe and the lifting of the structure can be repeated.
  • the supporting bar 10 may be kept in place and attached to the hollow pipe 4 by welding, for instance.
  • the supporting bar 10 and the hollow pipe 4 form together a support structure for the lifted structure.
  • the supporting bar 10 supports the lifted structure after the lifting.
  • the supporting bar 10 and the hollow pipe 4 may be joined to be immovable relative to each other by, for example, injecting polymer as an adhesive.
  • the length of the supporting bar 10 may be determined in such a way that it can be extended as far as to the firm horizon 2a.
  • the length of the supporting bar may be, for example, somewhere between 2 and 20 meters.
  • the supporting bar 10 may be formed of several parts fastened to each other by threaded connection, for instance.
  • the supporting bar 10 may be a solid steel bar, for example, or then the supporting bar 10 may be hollow, for instance a steel pipe.
  • the outer diameter of the supporting bar 10 is arranged to correspond to the inner diameter of the hollow pipe. Then, the hollow pipe 4 supports the supporting bar 10 and prevents it from buckling.
  • the outer diameter of the supporting bar 10 may be, for example, somewhere between 0 to 100 mm.
  • the supporting bar 10 may be arranged in the ground by drilling, for instance.
  • the tubular supporting bar 10 may be installed by using a solution where the drill bit pulls the tubular supporting bar with it.
  • Polymer may be injected to the lower end of the supporting bar 10. If the supporting bar 10 is tubular, the inside of the supporting bar 10 can be utilized in injecting. Polymer improves the adhesion of the supporting bar 10 to the firm horizon 2a, for instance.
  • the hollow pipe 4 may be arranged to be rather long in such a way that it supports the supporting bar 10 so that the bar will not buckle.
  • the hollow pipe 4 may extend from the lower fastener 6 rather a long way downwards.
  • the hollow pipe 4 may be arranged to be so long that it extends from the lower surface of the structure to be lifted as far or nearly as far as the supporting bar 10 extends downwards from the lower surface of the structure to be lifted.
  • the hollow pipe 4 extends over the distance of at least 60% of the distance by which the supporting bar 10 extends below the structure to be lifted.
  • the hollow pipe 4 extends over the distance of at least 80% of the distance by which the supporting bar 10 extends below the structure to be lifted.
  • the hollow pipe 4 may also be formed of several parts fastened to each other by threaded connection, for instance.
  • the hollow pipe 4 may be a steel pipe, for example.
  • the wall thickness of the hollow pipe 4 may vary between 3 and 20 mm, for instance.
  • the polymer 9 having permeated the wall of the bag 5 is also prevented from passing into the hollow pipe from its lower end.
  • the distance over which the hollow pipe 4 is arranged to extend below the lower fastener 6 depends on, for instance, the viscosity of the polymer to be injected and the reaction time and/or the permeability of the wall of the bag 5. In an embodiment, the hollow pipe 4 extends 1.5 to 3.0 meters below the lower fastener 6.
  • the lower end of the hollow pipe 4 may also be provided with a plug which prevents the polymer from passing into the inside of the hollow pipe 4.
  • the supporting bar 10 allows this plug to be pushed off in such a way that the supporting bar can be arranged at a sufficient depth.
  • the supporting bar 10 may be arranged inside the hollow pipe 4 also before the hollow pipe and the bag 5 surrounding it are arranged in the hole 3.
  • the wall of the bag 5 may thus be of an inelastic and air permeable textile, such as geotextile.
  • the wall thickness of the bag 5 may vary between 0.05 and 5 mm, for instance, depending on the material, size of the expansion element, i.e. the bag, expansion pressure etc.
  • the permeability of the wall of the bag 5 in an embodiment is somewhere between 12 and 50 l/dm 2 /min with a water column of 20 mm.
  • the length of the bag 5 may vary between 20 cm and 2 m, for example. When the bag 5 is full of reacted polymer 9, its outer diameter may vary between 15 cm and 1 m, for instance.
  • the wall material of the bag 5 it is possible to use a plastic, such as polyester or polypropylene, or artificial fibre or natural fibre.
  • the wall of the bag 5 may also include metallic reinforcement material or glass fibre, or some other suitable reinforcement material.
  • the bag 5 may be provided either with seams or without seams. The seam may be made, for instance, by sewing, gluing, using an attachment element, riveting, welding, soldering, melting or by some other mechanical, chemical, thermal or electrotechnical method or a combination thereof.
  • the bag 5 may be, for instance, cylindrical when it is full of polymer 9. Further, the bag 5 may be slimmer at the upper and lower ends, and the middle portion may be larger in diameter. Before polymer is injected into the bag 5, the shape of the bag 5 is inessential. After the polymer has reacted inside the bag 5, the bag 5 achieves its final shape, which is affected, in addition to the properties and amount of polymer 9, by the properties of the ground surrounding the bag 5.
  • the polymer 9 may be, for example, a mixture mainly consisting of two components.
  • the first component may mainly contain polyether polyol and/or polyester polyol, for example.
  • the second component may contain isocyanate, for instance.
  • the volumetric ratios of the first component to the second component may vary between 0.8 to 1.2 : 0.8 to 1.8, for example.
  • the polymer may further contain catalysts and water and, if desired, also other components, such as silica, rock dust, fibre reinforcements and other possible additional and/or auxiliary agents.
  • the use of a single- component polymer is also possible in connection with the solutions disclosed in this description.
  • the polymer 9 may be non-expanding, in which case its chemical reaction in the bag 5 typically comprises solidification and/or hardening.
  • the polymer 9 may also be material expanding as a consequence of a chemical reaction, whereby the polymer 9 expands in the bag 5 when reacting and, in addition to expansion, also naturally solidifies and/or hardens.
  • the polymer 9 may be arranged to expand for instance 1.5 to 20 times from the original volume.
  • the material expanding as a consequence of a chemical reaction needs not be fed into the bag 5 at as high a hydraulic pressure as a non- expanding polymer.
  • the polymer feeding equipment may be formed to be simpler.
  • the viscosity of the polymer is somewhere between 150 and 750 mPa-s at a temperature of 25 °C but, in some embodiments, the viscosity may be beyond the values given, depending on the application.
  • FIG. 6 shows one solution for injecting the polymer 9 into the inside of the bag 5.
  • the injecting tube 7 needs not be arranged outside the hollow pipe 4.
  • the inside of the hollow pipe 4 is provided with a feed piece 15, to which the injecting tube 7 is connected.
  • the feed piece 15 has channels 16 arranged at holes 17 made in the wall of the hollow pipe 4.
  • the polymer 9 flows from the injecting tube 7 through the channels 16 of the feed piece 15 and the holes 17 into the inside of the bag 5, between the outer surface of the hollow pipe 4 and the inner surface of the bag 5.
  • the injecting tube 5 is pulled off from the inside of the hollow pipe 4.
  • the feed piece 15 can be removed by, for example, pushing it off through the lower end of the hollow pipe 4.
  • Figure 7 shows a construction 1 positioned in the ground 2, where the firm horizon is so far that it is not reasonable to arrange the supporting bar 10 to extend as far as that.
  • the supporting bar 10 may be arranged in the ground 2 in a substantially non-subsidable manner by utilizing what is called a cohesive structure.
  • the hole 3 is provided with the hollow pipe 4, the bag 5 arranged outside it, and the supporting bar 10 arranged inside the hollow pipe 4 and having a bag 19 arranged by a fastener 18 at its lower end.
  • the fastener 18 corresponds to the fasteners 6, and the bag 19 corresponds to the bag 5 with regard to its structure.
  • Figure 9 shows how polymer 9 is injected into the inside of the bag 5.
  • Figure 9 shows how the supporting bar 10 serves as the injecting tube and how polymer is injected along it into the bag 19.
  • the polymer 9 and the bag 19 form a polymer pillar which adheres to the surrounding ground due to the effect of cohesive forces and/or friction, forming thus a cohesive structure.
  • the installing depth of the bag 19 and its length and diameter are dimensioned in such a way that the bag has sufficient cohesive adhesion and/or frictional adhesion to the surrounding ground 2 to withstand the lifting load.
  • the length of the bag 19 may vary between 0.5 and 3 m, for example, and its diameter may vary between 20 cm and 1 m.
  • the adhesion of the supporting bar 10 to the polymer 9 may be ensured in the same way as the adhesion of the hollow pipe 4 inside the bag 5 to the polymer 9, i.e. by the selection of the material of the polymer 9 and by forming the outer surface of the supporting bar 10 uneven or rough, for instance by sandblasting.
  • Figure 10 shows how the actuator 11 is arranged at the upper end of the hollow pipe 4 around the supporting bar 10, attaching means being arranged at the end of its piston to provide attachment to the supporting bar in a way corresponding to that described in the context of Figure 4.
  • Figure 11 illustrates lifting of a structure in a way corresponding to that described in the context of Figure 5.
  • the supporting bar 10 provided with a cohesion structure may be fixedly attached to the hollow pipe 4 after the lifting. In this way, the cohesive structure formed in the ground can be arranged to support the structure 1.
  • the extent of lifting the structure 1 may be rather slight if it is sufficient to stop or reduce subsidence of the structure and/or to prevent or reduce possible after-subsidence.
  • Moving of the structure can be monitored with, for example, laser equipment or the like sensitive measuring equipment. Lifting of the structure can thus be stopped immediately when a lifting reaction is detected by the measuring device. Detecting a lifting reaction indicates that the load of the structure 1 has been transferred to be supported at least partially by the supporting bar 10.
  • Structures to be lifted may thus include buildings and their foundations, such as slab-on-grades, pile foundations, spread footings, their mat slabs etc. Further, structures to be lifted may include a street structure or a courtyard or a structure of the public utility services. If there is a weak foundation or no foundation at all in the structure to be lifted, for instance polymer which reinforces the ground may be injected before the lifting into the ground where the lifting takes place, above the lifting point. In this way, polymer allows a larger area to be lifted. Further, injecting polymer before the lifting allows a foundation consisting of separate parts, such as separate stones, to be reinforced by injecting polymer between the separate parts, in which case the polymer enables separate parts to be attached to each other.
  • the structure to be lifted may also be lifted at several points simultaneously. Then, lifting structures are arranged at several points and the lifting means are used simultaneously. Lifting means at different points may be controlled in such a way that the lifting is smooth at every point or, if required, of different extent at different points.
  • the adhesion of the bag 5 to the ground can be improved by, for example, injecting polymer 9 into the ground outside the bag 5.
  • the supporting bar 10 may be arranged in the ground 2 in a substantially non-subsidable manner with a cohesive structure by using as the cohesive structure some other applicable cohesive structure which adheres to the ground due to the effect of the cohesive force and/or friction.
  • the lifting means may thus comprise, for instance, an actuator 11 provided with a piston 11a, in which case the lifting means may be a hydraulic jack, for example.
  • the lifting means may be, for example, a screw jack or the like lifting means.
  • the lifting means may be formed in a manner illustrated by Figure 12, for instance, i.e. such that a screw thread 20 has been formed inside the hollow pipe 4, and a screw piece 21 is arranged inside the hollow pipe 4.
  • the screw piece 21 is positioned upon the supporting bar 10.
  • the screw piece 21 and the supporting bar 10 are arranged in such a way that the screw piece 21 can be rotated by, for example, turning a lever 22 without the supporting bar 0 having to rotate. Rotating the screw piece 21 allows the hollow pipe 4 and thus the structure 1 to be lifted in relation to the supporting bar 10.
  • Figure 13 shows the lower part of the structure of one lifting means solution. Also in the solution of Figure 13, a screw thread is formed inside the hollow pipe 4, and a screw piece 21 is arranged inside the hollow pipe 4. The screw piece 21 is supported via a support piece 23 against an upper part 10' in the supporting bar 10. The upper part 10' of the supporting bar 10 is arranged outside the hollow pipe 4. The upper part 10' of the supporting bar 10 is provided with a shoulder, against which the support piece 23 is supported. Rotating the screw piece 21 allows thus the hollow pipe 4 to be lifted in relation to the supporting bar 10.
  • the upper part 10' of the supporting bar 10 may be a separate piece arranged in the rest of the structure of the supporting bar 10 by thread connection, for example, as shown in Figure 13, or then the upper part 10' of the supporting bar 10 may form a continuous structure together with the rest of the supporting bar 10.
  • the support piece 23 may be a part separate from the screw piece 21 , or then the support piece 23 may be a part of the screw piece 21 , in which case the lower part of the screw piece 21 is machined like the support piece 23 according to Figure 13.
  • the supporting bar 10 is first arranged through the hole 3, and after that, the hollow pipe 4 and the screw piece in connection with the hollow pipe 4 are arranged on top of the supporting bar and partially inside its upper part.
  • the lifting means is the above structure formed of a screw thread 20 inside a hollow pipe 4 and a screw thread 21
  • the lifting means provides a permanent load-bearing structure; in other words, for example, no other attachment, such as welding or gluing, is required between the hollow pipe 4 and the supporting bar 10.
  • no other attachment such as welding or gluing
  • Such an arrangement enables simple changing of the height of the structure 1 , such as lowering or additional lifting, later on when required.
  • a lifting means of another type, such as a hydraulic jack is used, the height of the structure 1 can be adjusted later by rearranging the lifting means in place.
  • the actuator 1 1 may also be arranged in such a way that its body is attached to the supporting bar 10 and its piston in the hollow pipe 4, in which case the device is upside down in relation to the embodiment of Figures 5 and 10, for example.

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)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Revetment (AREA)

Abstract

L'invention porte sur un procédé et un équipement pour lever une structure. Un tuyau creux (4) est disposé au point de levage de la structure à lever. Une liaison est formée entre le tuyau creux (4) et la structure à lever par injection de polymère (9) sur l'extérieur du tuyau creux (4). Une barre de support (10) est disposée en raccord avec le tuyau creux (4) et elle est disposée dans le sol (2) de manière à ne pratiquement pas pouvoir s'enfoncer. Le tuyau creux (4) et la structure liée à celui-ci par ladite liaison sont élevés par rapport à la barre de support (10) et de telle sorte qu'ils sont supportés contre la barre de support (10).
EP13744134.1A 2012-01-30 2013-01-30 Levage d'une structure Withdrawn EP2815032A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20125089 2012-01-30
PCT/FI2013/050100 WO2013113996A1 (fr) 2012-01-30 2013-01-30 Levage d'une structure

Publications (2)

Publication Number Publication Date
EP2815032A1 true EP2815032A1 (fr) 2014-12-24
EP2815032A4 EP2815032A4 (fr) 2015-11-25

Family

ID=48904464

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13744134.1A Withdrawn EP2815032A4 (fr) 2012-01-30 2013-01-30 Levage d'une structure

Country Status (3)

Country Link
EP (1) EP2815032A4 (fr)
AU (1) AU2013203319A1 (fr)
WO (1) WO2013113996A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104763004B (zh) * 2014-01-02 2016-10-05 百盛联合建设集团有限公司 土地基建筑物纠偏方法
FR3050745B1 (fr) * 2016-04-28 2018-04-20 Greffet Pied de poteau reglable dans les trois axes de sa longueur largeur et hauteur, destine a etre utilise dans les structures de batiment dotees de poutres verticales
US10487473B2 (en) * 2017-06-20 2019-11-26 Charles L. Asplin Wall lifting methods
AU2019101315B4 (en) * 2019-08-26 2020-06-18 Wainfield Pty. Ltd. A method and apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100621669B1 (ko) * 2006-05-23 2006-09-07 주식회사고려이엔시 압입체를 이용한 구조물 인상 및 기초보강 공법
ITBO20060414A1 (it) * 2006-05-26 2007-11-27 Soles Societa Lavori Edili E Serbatoi Spa Metodo per sollevare un manufatto edilizio.
KR100654228B1 (ko) * 2006-08-24 2006-12-06 정언섭 재인상이 가능한 압입체를 이용한 구조물 인상공법
KR100816044B1 (ko) * 2007-12-18 2008-03-24 문형록 마이크로 파일을 이용한 구조물 인상 및 지지공법

Also Published As

Publication number Publication date
WO2013113996A1 (fr) 2013-08-08
EP2815032A4 (fr) 2015-11-25
AU2013203319A1 (en) 2013-08-15

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