EP1375754B1 - Packer und Verfahren zur Bodenvernagelung - Google Patents

Packer und Verfahren zur Bodenvernagelung Download PDF

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Publication number
EP1375754B1
EP1375754B1 EP02024268A EP02024268A EP1375754B1 EP 1375754 B1 EP1375754 B1 EP 1375754B1 EP 02024268 A EP02024268 A EP 02024268A EP 02024268 A EP02024268 A EP 02024268A EP 1375754 B1 EP1375754 B1 EP 1375754B1
Authority
EP
European Patent Office
Prior art keywords
packing
grouting
nailing
pipe
liquid grout
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.)
Expired - Fee Related
Application number
EP02024268A
Other languages
English (en)
French (fr)
Other versions
EP1375754A2 (de
EP1375754A3 (de
Inventor
Myung-Jae Lee
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.)
Do Dam Engineering Co Ltd
Bokang Tech Co Ltd
Korea Land Corp
Original Assignee
Do Dam Engineering Co Ltd
Bokang Tech Co Ltd
Korea Land Corp
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Filing date
Publication date
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Application filed by Do Dam Engineering Co Ltd, Bokang Tech Co Ltd, Korea Land Corp filed Critical Do Dam Engineering Co Ltd
Publication of EP1375754A2 publication Critical patent/EP1375754A2/de
Publication of EP1375754A3 publication Critical patent/EP1375754A3/de
Application granted granted Critical
Publication of EP1375754B1 publication Critical patent/EP1375754B1/de
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • 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
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection

Definitions

  • the present invention relates to a packing apparatus for pressure type soil-nailing and soil-nailing construction method using the packing apparatus. More specifically, the invention relates to a packing apparatus for pressure type soil-nailing and soil-nailing construction method using the packing apparatus which is suitable for sealing closely grouting area which is formed in a bored hole and improving construction efficiency through grouting by pressure, that is, filling pressuringly of liquid grout.
  • Soil-nailing which has been used most widely as a construction method for slope stability is a construction method which reinforces the ground and is utilized widely in Europe and United States of America with a purpose of slope reinforcement a soft timbering to dug surface and so on.
  • Such soil-nailing construction method is a construction method that augments a whole shearing strength of original ground oneself and prohibits a displacement of the ground within the limits of the possibility which is expected during construction or after completion of construction by inserting a nail in original ground to comparatively dense space without prestressing.
  • soil-nailing construction method when compared with other constructing method such as a heavy weight of concrete wall, a big pile wall and a slurry wall which places at a spot, etc., soil-nailing construction method has the advantage of inexpensive construction cost, a light weight of construction equipment and adaptation and flexibility of a spot and a ground condition, etc. and has a characteristic that can have enough resistibility without excessive displacement in case of even a dynamic load of earthquake, etc.
  • ground digging for establishing a slope protection and a stiffener is basically the same as general ground digging.
  • the dug surface of soil-nailing is used in many cases as the main structure, it needs to dig into correct position and shape. Also, according to the nature of the soil, it needs to dig by considering an dug depth in which the ground is capable of self-support, a curing time for injected grout or shot-crete to obtain a predetermined intensity and the like.
  • Maximum dug depth is generally related with apparent cohesion of the ground, it is good to limit to 2m to the maximum for perpendicular digging of step by step.
  • said boring is done by a rock drill or a boring machine etc. and most of said boring use fluid. (air, water, cement grout and bentonite)
  • a deformed bar or a steel bar etc. can be used as the nail 3 which is used at the soil-nailing construction method and noxious earth or oil etc. of portions which are attached to grout should be removed beforehand.
  • the nail 3 that is used for permanent structures should consider an extra for rust when designed or use steel materials in which rust prevention is processed, and it is good that said nail 3 uses without a joint, however, in case that said nail should be obliged to connect because insertion length thereof is long, a coupler should be used and connection by general welding should be avoided.
  • process to establish the nail 3 at the bored hole is as follows.
  • said grouting should fill completely interior of the bored hole 11 and should be executed repeatedly 3 ⁇ 6 times according to a tendency that liquid grout is permeated in surrounding the ground.
  • JP-A-08013484 discloses a water stop material, whose gravity is larger than the grout material and which blocks the anchor hole. The construction makes it possible to prevent the election of grouts material when pulling out the final casing pipe.
  • An object of the present invention is to provide a packing apparatus for pressure type soil-nailing and soil-nailing construction method using the packing apparatus which can shorten a construction term and improve construction efficiency by executing grouting at a situation which seals completely grouting area by injecting a quick forming expansion agent at the packing apparatus.
  • Another purpose of the present invention is provide to the packing apparatus for pressure type soil-nailing and soil-nailing construction method using the packing apparatus which is suitable for improving stability of ground reinforcements by filling liquid grout to even a gap between the boring hole and the ground and void of the ground through pressure type soil-nailing.
  • the present invention provides a packing apparatus according to the features of claim 1 and a soil-nailing method using a packing apparatus according to claim 1, comprising the features of claim 5.
  • Fig. 3 is a perspective view of the packing apparatus for pressure type soil-nailing of the present invention
  • Fig. 4 is a perspective view with parts taken away of the packing apparatus for pressure type soil-nailing of the present invention
  • Fig. 5 is a cross section of the ground for explaining the establishment state of the packing apparatus for pressure type soil-nailing of the present invention.
  • the packing apparatus for pressure type soil-nailing of the present invention are inserted the first packing 33a and the second packing 33b at a predetermined interval mutually to a lengthwise direction of the nail 31 in which screw threads are formed on the circumferential surface.
  • non-woven fabric 35 that seals empty space between said first packing 33a and second packing 33b by wrapping the circumferential surface of said first packing 33a and second packing 33b.
  • non-woven fabric 35 nylon or tent fabric, etc. can be used and it does not matter if any material that has enough resistibility to pressure according to bulk swelling of foaming urethane to be injected into empty space between said first packing 33a and second packing 33b.
  • first packing 33a and second packing 33b rubber, soft plastic, wood, steel plate, etc. can be used and rubber of the materials is most desirable.
  • the first grouting pipe 37 is established which pierces said first packing 33a and second packing 33b and firstly injects liquid grout in said grouting area
  • the discharging pipe 39 of air and foreign material is established which pierces said first packing 33a and second packing 33b and discharges air and foreign material of grouting area due to said grouting.
  • one end of said first grouting pipe 37 is established at a longitudinal end of said boring hole, that is, near one end of said nail 31, and it is also desirable that one end of said discharging pipe 39 of air and foreign material is established near said second packing 33b.
  • said discharging pipe 39 of air and foreign material does so that pressure can be applied in said grouting area by closing the inlet after discharging air or foreign material as well as discharging to outside of the boring hole foreign materials such as air or water which occurs in said grouting area.
  • the packing apparatus for pressure type soil-nailing of the present invention is established so that foaming urethane injection pipe 43 for injecting a quick forming expansion agent such as foaming urethane at space which is sealed by said non-woven fabric 35 may pierce said first packing 33a.
  • One end of said foaming urethane injection pipe 43 is situated at space between said first packing 33a and second packing 33b.
  • Said foaming urethane becomes gel by injecting liquid urethane in the state in which nail 31 is established and said liquid urethane becomes gel at space between said first packing 33a and second packing 33b, thereby the bulk swells.
  • liquid urethane has an advantage that can regulate very variously all sorts of material properties such as foaming magnification and mechanical strength, etc. Because the time in which liquid urethane becomes gel is actually no more than a few minutes, in case of filling this to space which is sealed by non-woven fabric 35, the first liquid grout can be injected in a little while.
  • wire rings 45 are established on outside of said non-woven fabric 35 along the circumferential surface of said first and second packing 33a, 33b.
  • the packing apparatus for pressure type soil-nailing of the present invention further comprises a second grouting pipe 41.
  • Said second grouting pipe 41 pierces said first packing 33a and second packing 33b but is established so that the one end thereof may approximate to said second packing 33b.
  • Such second grouting pipe 41 is a pipe for injecting the second liquid grout in order to fill empty space that occurs at interior of boring hole by dry shrinkage of cement after the first grouting.
  • Said second grouting pipe 41 fills liquid grouts secondly by a pressure method to space in which the first liquid grout does not to fill, whereby close filling can be done over a whole grouting area, and at the same time it does so that liquid grout can be filled sufficiently to even void that is formed on the ground around the boring hole.
  • Soil-nailing construction method using the packing apparatus of the present invention comprises step to dig the ground (S101), step to form the boring hole (S102), step to establish the packing apparatus for pressure type soil-nailing (S103), step to form isolated grouting area (S104), step to fill liquid grout (S105), step to discharge air and foreign material (S106), step to seal grouting area (S107) and step to fill pressurizingly liquid grout (S108).
  • step (S101) is executed to dig the ground to a stable height in which slope or wall of pit digging is capable of self-support.
  • step (S102) is executed to form the boring hole by boring a hole of a predetermined diameter in a proper position of said dug ground.
  • step (S103) is executed to establish by inserting the packing apparatus for pressure type soil-nailing in which the nail 31 such as showed in Fig. 3 is established at the bored hole of said dug ground.
  • step (S104) is executed to form isolated grouting area by closely contacting said packing apparatus for pressure type soil-nailing at diameter of the boring hole.
  • liquid urethane becomes gel very fast, if passing several minutes after injecting, it becomes gel, whereby the bulk swells.
  • isolated grouting area that can inject liquid grout is formed at interior of said boring hole.
  • step (S105) is executed to fill by injecting in grouting area liquid grout such as cement milk.
  • step (S106) is executed to discharges air or foreign material etc. to outside through the discharging pipe 39 of air and foreign material, at the same time liquid grout is filled in grouting area.
  • step (S107) to seal grouting area by blocking a discharge passage of air and foreign material is executed.
  • step (S108) to fill pressurizingly liquid grout in said grouting area by continuing to inject liquid grout is executed.
  • liquid grout is filled to even void and joint that is formed in the ground surrounding the boring hole.
  • step to inject again liquid grout can be further included.
  • said second grouting pipe 41 is established so that one end thereof may approximate to said second packing 33b, it can fill liquid grout more easily at surrounding said second packing 33b where due to dry contraction, the first liquid grout was not filled.
  • step to establish a wire mesh at wall of the ground is executed.
  • step is executed to fix pressurizingly said reinforcing bar with a plate and a nut that are fastened to said nail 31.
  • step to place shot-crete is executed, soil-nailing construction method using the packing apparatus for pressure type soil-nailing of the present invention is completed.
  • the packing apparatus for pressure type soil-nailing and soil-nailing construction method using the packing apparatus of the present invention has the following effects.
  • grouting work can be done in a short time, thereby can shorten a construction time.
  • liquid grouting can be filled firmly to even void and joint that is formed at the ground through pressure type soil-nailing, stability of the ground reinforcements can be improved.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)

Claims (6)

  1. Packer zum Versiegeln einer Verfestigungsfläche, indem er in einem Loch, das auf einer aufgegrabenen Fläche gebohrt ist, eingeführt wird, wobei der Packer zur druckartigen Bodenvernagelung umfasst:
    einen Nagel (31);
    eine erste Abdichtung (33a) und eine zweite Abdichtung (33b), die in einem vorbestimmten Abstand zueinander in Längsrichtung des Nagels (31) eingepasst sind;
    ein Vlies (35) zum Versiegeln von Raum zwischen der ersten Abdichtung (33a) und der zweiten Abdichtung (33b), indem es bereitgestellt wird, um die Umfangsfläche der ersten Abdichtung (33a) und zweiten Abdichtung (33b) zu umwickeln;
    ein erstes Verfestigungsrohr (37) zum Injizieren von flüssigem Verfestigungsmaterial in die Verfestigungsfläche, wobei das erste Verfestigungsrohr (37) die erste Abdichtung (33a) und zweite Abdichtung (33b) durchstößt, aber ein Ende des Rohrs (37) in einer Position nahe des einen Endes des Nagels (31) eingerichtet ist;
    ein Auslassrohr (39) für Luft und Fremdmaterial zum Auslassen von Luft und Fremdmaterial einer Verfestigungsfläche durch das Verfestigen, wobei das Auslassrohr (39) für Luft und Fremdmaterial die erste Abdichtung (33a) und zweite Abdichtung (33b) durchstößt, aber ein Ende des Rohrs (39) in einer Position nahe der zweiten Abdichtung (33b) eingerichtet ist; und
    ein Urethanschaum-Injektionsrohr (43) zum Injizieren eines Urethanschaums, dessen Volumen aufgrund seiner Gelkonsistenz in einem Raum expandiert wird, der von dem Vlies (35) versiegelt ist, wobei das Urethanschaum-Injektionsrohr (43) die erste Abdichtung (33a) durchstößt, aber ein Ende des Rohrs (43) im Raum zwischen der ersten Abdichtung (33a) und zweiten Abdichtung (33b) eingerichtet ist.
  2. Packer gemäß Anspruch 1, welcher ferner ein zweites Verfestigungsrohr (41) umfasst zum Injizieren von flüssigem Verfestigungsmaterial in die Verfestigungsfläche durch Durchstoßen der ersten Abdichtung (33a) und zweiten Abdichtung (33b), aber Einrichten seines Endes an einer Position nahe der zweiten Abdichtung (33b).
  3. Packer gemäß Anspruch 1, welcher ferner Drahtringe (45) umfasst zum engen Verbinden des Vlies (35) auf der Umfangsfläche der ersten und zweiten Abdichtung (33a, 33b) durch Schrauben, wobei die Drahtringe (45) an der Außenseite des Vlies (35) entlang der Umfangsfläche der ersten und zweiten Abdichtung (33a, 33b) eingerichtet sind, um die erste, zweite Abdichtung (33a, 33b) und das Vlies (35) zu verbinden.
  4. Packer gemäß Anspruch 1, wobei die erste und zweite Abdichtung (33a, 33b) ein Gummimaterial sind.
  5. Bodenvernagelungskonstruktionsverfahren unter Verwendung eines Packers gemäß Anspruch 1 zur druckartigen Bodenvernagelung, wobei das Verfahren umfasst,
    Aufgraben des Bodens bis zu einer stabilen Höhe, bei der ein Hang oder eine Wand einer Grubengrabung sich selbst stützen kann;
    Bilden eines Bohrlochs durch Bohren eines Lochs eines vorbestimmten Durchmessers bei einer passenden Position des aufgegrabenen Bodens;
    Einrichten durch Einführen in das Bohrloch des Packers zur druckartigen Bodenvernagelung, mit dem ein Nagel (31) eingerichtet wird;
    Bilden einer isolierten Verfestigungsfläche zum Injizieren von flüssigem Verfestigungsmaterial durch nahes Inkontaktbringen des Packers zur druckartigen Bodenvernagelung an einem Innendurchmesser des Bohrlochs;
    Einfüllen durch Injizieren von flüssigem Verfestigungsmaterial in die Verfestigungsfläche;
    Auslassen nach außen von Luft und Fremdmaterial in der Verfestigungsfläche, wenn flüssiges Verfestigungsmaterial in die Verfestigungsfläche injiziert wird;
    Versiegeln der Verfestigungsfläche durch Blockieren eines Durchgangs, in den die Luft und Fremdmaterial ausgelassen werden; und
    Einfüllen von flüssigem Verfestigungsmaterial unter Druck in die Verfestigungsfläche, so dass flüssiges Verfestigungsmaterial sogar Leerraum und Spalten des Bodens auffüllen kann, der das Bohrloch umgibt.
  6. Bodenvernagelungskonstruktionsverfahren gemäß Anspruch 5, welches ferner umfasst
    Nochmaliges Eingießen von flüssigem Verfestigungsmaterial, nachdem eine vorbestimmte Zeit seit Abschluss des Schritts des Einfüllens von flüssigem Verfestigungsmaterial unter Druck in die Verfestigungsfläche vorübergegangen ist.
EP02024268A 2002-06-22 2002-10-31 Packer und Verfahren zur Bodenvernagelung Expired - Fee Related EP1375754B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2002018948 2002-06-22
KR2020020018948U KR200290351Y1 (ko) 2002-06-22 2002-06-22 압력식 쏘일네일링용 패커기

Publications (3)

Publication Number Publication Date
EP1375754A2 EP1375754A2 (de) 2004-01-02
EP1375754A3 EP1375754A3 (de) 2004-09-15
EP1375754B1 true EP1375754B1 (de) 2009-04-29

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ID=31185701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02024268A Expired - Fee Related EP1375754B1 (de) 2002-06-22 2002-10-31 Packer und Verfahren zur Bodenvernagelung

Country Status (5)

Country Link
US (1) US20030235472A1 (de)
EP (1) EP1375754B1 (de)
JP (1) JP2004027813A (de)
KR (1) KR200290351Y1 (de)
DE (1) DE60232139D1 (de)

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KR100773920B1 (ko) 2007-05-03 2007-11-07 주식회사 도담이앤씨 정착부 확공 및 고강도 강봉을 이용한 프리-텐션 쏘일네일링 시스템 및 이를 이용한 사면 안정보강 공법
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CN111502641A (zh) * 2020-04-27 2020-08-07 淮南矿业(集团)有限责任公司 瓦斯测压装置及瓦斯测压方法
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JPH11200365A (ja) * 1998-01-07 1999-07-27 Hokuriku Engineering Kk アンカー用定着装置及びその定着方法
US6135204A (en) * 1998-10-07 2000-10-24 Mccabe; Howard Wendell Method for placing instrumentation in a bore hole

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EP1375754A3 (de) 2004-09-15
DE60232139D1 (de) 2009-06-10
JP2004027813A (ja) 2004-01-29
KR200290351Y1 (ko) 2002-09-27
US20030235472A1 (en) 2003-12-25

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