EP3744902A2 - Verfahren zur verfestigung eines untergrunds - Google Patents

Verfahren zur verfestigung eines untergrunds Download PDF

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Publication number
EP3744902A2
EP3744902A2 EP20171550.5A EP20171550A EP3744902A2 EP 3744902 A2 EP3744902 A2 EP 3744902A2 EP 20171550 A EP20171550 A EP 20171550A EP 3744902 A2 EP3744902 A2 EP 3744902A2
Authority
EP
European Patent Office
Prior art keywords
perforation
fluid
rod
dispensing
accelerating
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Withdrawn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
EP20171550.5A
Other languages
English (en)
French (fr)
Other versions
EP3744902A3 (de
Inventor
Antonio Sanella
Filippo AVANZINI
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.)
Clivio SRL
Original Assignee
Clivio SRL
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 Clivio SRL filed Critical Clivio SRL
Priority to EP20206760.9A priority Critical patent/EP3808903A1/de
Publication of EP3744902A2 publication Critical patent/EP3744902A2/de
Publication of EP3744902A3 publication Critical patent/EP3744902A3/de
Withdrawn legal-status Critical Current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
    • E02D37/00—Repair of damaged foundations or foundation structures
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/20—Securing of slopes or inclines
    • 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
    • E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/66—Mould-pipes or other moulds
    • E02D5/665—Mould-pipes or other moulds for making piles
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
    • E21B33/138—Plastering the borehole wall; Injecting into the formation

Definitions

  • the present invention relates to a placing system and method of a stopper plug in a land consolidation perforation.
  • This system and method is used to prevent copious and undesired leakage of consolidation material, previously introduced into the perforation to form a columnar volume of consolidation.
  • it is used in applications where the perforation has a mouth that is located at a lower or identical height with respect to the bottom and therefore gravity facilitates this leakage.
  • the system and method according to the present invention are in particular used in conjunction with the jet grouting technique, known per se.
  • jet grouting a land consolidation technique known as jet grouting
  • the reference numeral 1 refers to a placing system of a stopper plug 6 in a perforation 7 in which a land consolidation material is present. This system 1 is used in a jet grouting system.
  • the system 1 comprises a conduit 2.
  • the conduit 2 extends at least in part outside the perforation 7. In particular, it extends along an imaginary prolongation of said perforation 7.
  • the conduit 2 is typically straight.
  • the conduit 2 also extends inside the perforation 7.
  • the conduit 2 may comprise a connection flange 71 connecting to a front wall 72 from which the perforation 7 extends. Typically this wall extends between the top and the bottom.
  • the system 1 further comprises introduction means 3 for introducing the plug 6 into the conduit 2.
  • the introduction means 3 may therefore define a loader of the plug 6.
  • the system 1 further comprises a pusher member 4 of the plug 6.
  • the pusher member 4 is movable along the conduit 2 so as to position the plug 6 in the perforation 7. In fact, by advancing along the conduit 2, the pusher member 4 pushes the plug 6 towards an end of the conduit that opens into said perforation 7.
  • the plug 6 is typically inserted into the perforation 7 by interference.
  • the plug 6 is deformable; thanks to this deformability it can be compressed transversely to an insertion direction in the perforation 7 and perform a sealing action on the walls of the perforation 7.
  • it could be made of rubber or polyurethane resin.
  • the plug 6 comprises a first and a second axial end 61, 62.
  • the plug 6 also comprises a lateral surface 63 extending between the first and the second end 61, 62.
  • the lateral surface 63 narrows as it passes from the first to the second end 61, 62.
  • the first axial end 61 is destined to reach more deeply into said perforation 7 with respect to the second axial end 62.
  • the plug 6 thus has a converging shape; for example, in the preferred solution the lateral surface 63 is truncoconical.
  • the system 1 comprises a perforation rod 5 for carrying out said perforation 7.
  • the rod 5 is movable along the conduit 2.
  • the conduit 2 is a guide conduit of the perforation rod 5. It is also a guide conduit of the plug 6.
  • the pusher member 4 coincides with/is a part of the perforation rod 5. The pusher member 4 is therefore integrated in the rod 5. There are no additional mechanical parts.
  • the introduction means 3 for introducing the plug 6 in the conduit 2 comprise a containing tank 31 of the plug 6.
  • the tank 31 is located by a side of the conduit 2.
  • the tank 31 may comprise an occludable opening 35 that allows loading the plug 6 in the tank 31 from outside the introduction means 3.
  • the introduction means 3 further comprise a thrust actuator 32 suitable to move said plug 6 from a first position in which it is located in the tank 31 to a second position in which it is located in the conduit 2.
  • This thrust actuator 32 moves transversely (preferably orthogonally) to the conduit 2.
  • the actuator 32 is linear. It is typically fluid-dynamically driven.
  • the thrust actuator 32 further comprises a concavity 320 at one end destined to come into contact with and push the plug 6.
  • This concavity 320 is destined to at least partially house the plug 6.
  • the concavity 320 could be counter-shaped to a portion of the plug 6 with which it comes into contact. This allows to better transfer the thrust on the plug 6, minimising the risk that the plug 6 may slip or position itself in an undesired way.
  • the introduction means 3 comprise a dividing wall 33 that is movable between a first configuration (see figures 3 and 7 ) in which it separates said tank 31 from the conduit 2 and a second configuration (see figures 4, 5, 6 ) in which it allows communication between said tank 31 and said conduit 2.
  • the dividing wall 33 thus occludes a communication passage 330 between the conduit 2 and the tank 31.
  • the dividing wall 33 is a guillotine.
  • the plug 6 is allowed to pass from the tank to the conduit 2 (through the above-mentioned communication passage 330).
  • the introduction means 3 comprise a moving device 34 suitable to move said dividing wall 33 between the first and the second configuration parallel to the conduit 2.
  • the moving device 34 can advantageously be driven fluid-dynamically.
  • the moving device 34 is a linear moving device.
  • the dividing wall 33 sealingly separates the tank 31 from the conduit 2. This allows preventing the consolidation material injected into the perforation 7 from dirtying the tank 31. This also prevents the consolidation material from dirtying the plug 6 before it is introduced into the conduit 2.
  • the conduit 2 comprises a stretch 22 in which the above-mentioned communication passage 330 is obtained.
  • This stretch 22 of the conduit 2 is interposed between a first and a second junction 221, 222 connecting it to two further sections of the conduit 2 between which it is interposed.
  • the conduit 2 advantageously also comprises a converging section 21 interposed between the above-mentioned communication passage 330 and one end 23 of the conduit 2 destined to engage in the perforation 7.
  • the placing system 1 may also comprise radial sealing means between the conduit 2 and the rod 5.
  • the radial sealing means comprise, for example:
  • This passage 330 advantageously lies between the radial sealing means and an end of the conduit 2 opening into the perforation 7.
  • An object of the present invention is also a placing system of a stopper plug 6 in a perforation 7 in which a land consolidation material is present.
  • This material is typically fluid.
  • This method is advantageously carried out by means of a placing system 1 having one or more of the characteristics described above.
  • the method comprises the step of extracting a perforation rod 5 from the perforation 7 while keeping the perforation rod 5 inside a conduit 2 that extends from said perforation 7.
  • This conduit 2 is advantageously straight.
  • the conduit 2 is coaxial with the perforation 7.
  • this step can be accompanied by a leakage of land mixed with the consolidation material from the perforation 7 in the conduit 2. In fact, it is not yet fully consolidated and is therefore movable.
  • the consolidation material is typically a mixture comprising water and cement that mixes with the land.
  • the conduit 2 also extends inside the perforation 7.
  • the method further comprises the step of introducing the plug 6 into the conduit 2, positioning the plug 6 between the perforation rod 5 and an inlet mouth 70 of the perforation 7. This occurs after extracting the rod 5 from the perforation 7.
  • the step of introducing the plug 6 in the conduit 2 occurs after retracting the rod 5 so that a zone for introducing the plug 6 into the conduit 2 is interposed between the rod 5 and the perforation 7.
  • the step of introducing the plug 6 in the conduit 2 comprises the sub-steps of (advantageously figure 3 shows an initial situation at rest):
  • the method comprises the step of pushing the plug 6 along the conduit 2 to fit the plug 6 into the inlet mouth 70 of the perforation 7.
  • the step of pushing the plug 6 along the conduit 2 to fit the plug 6 into the inlet mouth 70 of the perforation 7 is carried out by pushing the plug 6 using the perforation rod 5.
  • the rod 5 is then moved along the conduit 2 and in particular approached and/or introduced into the inlet mouth 70 of the perforation 7.
  • the method may comprise the steps of:
  • An object of the present invention is also a method for land consolidation.
  • This land consolidation method comprises the step of implementing a placing method of a plug 6 having one or more of the steps described above.
  • the land consolidation method Prior to the step of implementing said placing method of the plug 6, the land consolidation method comprises the step of carrying out a perforation 7; advantageously, the step of carrying out the perforation 7 is carried out using the perforation rod 5.
  • the method further comprises the step of dispensing consolidation material inside the perforation 7.
  • the step of dispensing the consolidation material takes place using at least a dispenser 50 located along the perforation rod 5. In particular this occurs during at least a part of a stroke of the rod 5 which moves from a bottom of said perforation 7 towards the inlet mouth 70 of the perforation 7.
  • the dispensed consolidation material advantageously comprises a cementitious material (other components may then be present e.g. a grip accelerator).
  • the step of dispensing the consolidation material comprises the step of dispensing a pressurised jet that breaks down the surrounding land.
  • the consolidation material will then mix with the surrounding land to form a columnar volume that reinforces the land (especially if several columnar volumes are made connected to each other, each obtained by a corresponding perforation).
  • the method comprises the step of rotating said rod 5 around an axis of longitudinal extension of said rod.
  • the step of dispensing the consolidation material can be carried out simultaneously by means of a plurality of nozzles, typically orientated along different dispensing directions (possibly they could also be diametrically opposite).
  • the consolidation method involves stopping the step of dispensing the consolidation material.
  • a first stretch of the perforation 7 has a reduced section, with respect to a second stretch of the perforation in which the land has been broken down by the step of dispensing the consolidation material.
  • the first stretch also comprises the inlet mouth 70 of the perforation 7.
  • the inlet mouth 70 of the perforation 7 is formed on an artificial wall.
  • the perforation 7 could extend from a wall 72 that extends between the top and bottom and defines the front of a tunnel under construction. This front is then coated with a layer of concrete or other material for safety.
  • the perforation 7 extends along a straight segment.
  • this straight segment has a horizontal component which is greater than the vertical one (meaning that the vertical component could also be zero).
  • the inlet mouth 70 is located at a lower height or at the same height as the bottom of the perforation.
  • the perforation 7 therefore extends horizontally or upwards (preferably slightly upwards). If necessary, the perforation could also extend downwards (if below a water head).
  • the present invention achieves important advantages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Hydrology & Water Resources (AREA)
  • Agronomy & Crop Science (AREA)
  • Soil Sciences (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Catching Or Destruction (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
EP20171550.5A 2019-05-27 2020-04-27 Verfahren zur verfestigung eines untergrunds Withdrawn EP3744902A3 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20206760.9A EP3808903A1 (de) 2019-05-27 2020-04-27 Platzierungssystem und verfahren für einen stopfen in einer perforation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102019000007254A IT201900007254A1 (it) 2019-05-27 2019-05-27 Sistema e metodo di posa di un tappo di occlusione di una perforazione

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP20206760.9A Division EP3808903A1 (de) 2019-05-27 2020-04-27 Platzierungssystem und verfahren für einen stopfen in einer perforation
EP20206760.9A Division-Into EP3808903A1 (de) 2019-05-27 2020-04-27 Platzierungssystem und verfahren für einen stopfen in einer perforation

Publications (2)

Publication Number Publication Date
EP3744902A2 true EP3744902A2 (de) 2020-12-02
EP3744902A3 EP3744902A3 (de) 2021-02-17

Family

ID=68234060

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20206760.9A Withdrawn EP3808903A1 (de) 2019-05-27 2020-04-27 Platzierungssystem und verfahren für einen stopfen in einer perforation
EP20171550.5A Withdrawn EP3744902A3 (de) 2019-05-27 2020-04-27 Verfahren zur verfestigung eines untergrunds

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20206760.9A Withdrawn EP3808903A1 (de) 2019-05-27 2020-04-27 Platzierungssystem und verfahren für einen stopfen in einer perforation

Country Status (3)

Country Link
EP (2) EP3808903A1 (de)
DE (1) DE202020005620U1 (de)
IT (1) IT201900007254A1 (de)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1764948A (en) * 1929-06-14 1930-06-17 Frankignoul Pieux Armes Method for driving lining tubes for molding concrete piles in the ground
DE1634565B2 (de) * 1964-05-22 1973-02-08 Schdruzeni kamenouhelnych dolu, Kladno (Tschechoslowakei) Injektionsgeraet fuer das einpressen von zwei miteinander reagierenden fluessigkeiten zum abdichten des baugrundes
JPS634115A (ja) * 1986-06-24 1988-01-09 Kyokado Eng Co Ltd 地盤注入工法
DE3718631A1 (de) * 1987-06-03 1988-12-22 Gkn Keller Gmbh Kombiniertes injektionsverfahren sowie vorrichtung zur herstellung eines hochverfestigten bodenvolumens bei gleichzeitiger stabilisierung des angrenzenden bodens
JP2001164589A (ja) * 1999-12-08 2001-06-19 Shimizu Corp 高圧気体貯蔵施設の構築方法
US9169611B2 (en) * 2000-06-15 2015-10-27 Geopier Foundation Company, Inc. Method and apparatus for building support piers from one or more successive lifts formed in a soil matrix
JP3626972B1 (ja) * 2003-10-02 2005-03-09 栄興産業株式会社 噴射攪拌工法および噴射攪拌装置
KR100776304B1 (ko) * 2006-05-25 2007-11-16 정진교 그라우팅 구멍이 다수개 일정한 간격을 두고 설치된 강관의내부에 다수개의 패커를 설치한 직천공 동시 주입장치 및이를 이용한 직천공그라우팅시공방법
DE102007023736B4 (de) * 2007-05-22 2011-01-20 Bauer Spezialtiefbau Gmbh Schnellabbindende HDI
KR101082528B1 (ko) * 2009-12-22 2011-11-10 김성희 지수패커 및 이를 채용한 강연선 홀딩장치
KR101545254B1 (ko) * 2014-08-28 2015-08-20 최정옥 중압혼합분사 주입장치 및 이를 이용한 주상형 구조체 시공방법
KR101552466B1 (ko) * 2014-11-26 2015-09-10 윤택규 자중식 지반밀착형 인발저항콘과 이를 이용한 지반보강공법 및 지반보강장치

Also Published As

Publication number Publication date
DE202020005620U1 (de) 2021-11-02
EP3808903A1 (de) 2021-04-21
EP3744902A3 (de) 2021-02-17
IT201900007254A1 (it) 2020-11-27

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