US20030235472A1 - Packing apparatus for pressure type soil-nailing and soil-nailing construction method using the packing apparatus - Google Patents

Packing apparatus for pressure type soil-nailing and soil-nailing construction method using the packing apparatus Download PDF

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Publication number
US20030235472A1
US20030235472A1 US10/284,967 US28496702A US2003235472A1 US 20030235472 A1 US20030235472 A1 US 20030235472A1 US 28496702 A US28496702 A US 28496702A US 2003235472 A1 US2003235472 A1 US 2003235472A1
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US
United States
Prior art keywords
packing
nailing
grouting
soil
pipe
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Abandoned
Application number
US10/284,967
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English (en)
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 Engr Co Ltd
Bokang Tech Co Ltd
Korea Land Corp
Original Assignee
Do Dam Engr Co Ltd
Bokang Tech Co Ltd
Korea Land Corp
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Application filed by Do Dam Engr Co Ltd, Bokang Tech Co Ltd, Korea Land Corp filed Critical Do Dam Engr Co Ltd
Publication of US20030235472A1 publication Critical patent/US20030235472A1/en
Abandoned legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • 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 2 m 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.
  • 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.
  • 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.
  • a packing apparatus for pressure type soil-nailing is characterized by comprising, in a packing apparatus for sealing a grouting area by being inserted at a hole that is bored on an dug surface, a nail; a first packing and a second packing that are fitted at a predetermined interval mutually at to the lengthwise direction of said nail; a non-woven fabric for sealing space between the first packing and the second packing by providing to wrap the circumferential surface of said first packing and second packing; a first grouting pipe for injecting liquid grout in said grouting area, the first grouting pipe pierces said first packing and second packing but one end of the pipe is established in a position near from one end of said nail; a discharging pipe of air and foreign material for discharging air and foreign material of a grouting area by said grouting, the discharging pipe of air and foreign material pierces said first packing and second packing but one end of the pipe is established in a position near from of said second packing; and a foaming
  • said packing apparatus for pressure type soil-nailing further comprises a second grouting pipe for injecting liquid grout into said grouting area by piercing said first packing and second packing but establishing the end thereof at a position near from said second packing, and further comprises wire rings for combining closely said non-woven fabric on the circumferential surface of said first and second packing by screwing, said wire rings are established at outside of said non-woven fabric along the circumferential surface of said first and second packing in order to combine said first, second packing and said non-woven fabric.
  • soil-nailing construction method using a packing apparatus for pressure type soil-nailing of the present invention is characterized by comprising digging the ground to a stable height in which slope or wall of pit digging is capable of self-support; forming a boring hole by boring a hole of a predetermined diameter at a proper position of said dug ground; establishing by inserting at the boring hole said packing apparatus for pressure type soil-nailing with which a nail is established; forming isolated grouting area for injecting liquid grout by contacting closely said packing apparatus for pressure type soil-nailing at a inner diameter of the boring hole; filling by injecting liquid grout in said grouting area; discharging to outside air and foreign material in grouting area when liquid grout is injected in said grouting area; sealing said grouting area by blocking a passage in which said air and foreign material are discharged; and filling pressurizingly liquid grout in said grouting area so that liquid grout may fill up to even void and joint of the ground surrounding boring hole.
  • soil-nailing construction method further comprises injecting liquid grout again after passing a predetermined time since completion of step to fill pressurizingly liquid grout in said grouting area.
  • FIGS. 1 a - 1 d are flowcharts of construction for explaining a soil-nailing construction method according to the prior art.
  • FIG. 2 is a conceptual view showing an embodiment to establish a nail according to conventional soil-nailing construction method.
  • 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.
  • FIG. 6 is a flowchart illustrating step-by-step soil-nailing construction method using the packing apparatus of the present invention.
  • 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 33 a and the second packing 33 b 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 33 a and second packing 33 b by wrapping the circumferential surface of said first packing 33 a and second packing 33 b.
  • 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 33 a and second packing 33 b.
  • first packing 33 a and second packing 33 b 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 33 a and second packing 33 b 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 33 a and second packing 33 b 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 33 b.
  • 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 33 a.
  • One end of said foaming urethane injection pipe 43 is situated at space between said first packing 33 a and second packing 33 b.
  • 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 33 a and second packing 33 b , 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 33 a , 33 b.
  • 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 33 a and second packing 33 b but is established so that the one end thereof may approximate to said second packing 33 b.
  • 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 (S 101 ), step to form the boring hole (S 102 ), step to establish the packing apparatus for pressure type soil-nailing (S 103 ), step to form isolated grouting area (S 104 ), step to fill liquid grout (S 105 ), step to discharge air and foreign material (S 106 ), step to seal grouting area (S 107 ) and step to fill pressurizingly liquid grout (S 108 ).
  • step (S 101 ) is executed to dig the ground to a stable height in which slope or wall of pit digging is capable of self-support.
  • step (S 102 ) is executed to form the boring hole by boring a hole of a predetermined diameter in a proper position of said dug ground.
  • step (S 103 ) 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 (S 104 ) is executed to form isolated grouting area by closely contacting said packing apparatus for pressure type soil-nailing at diameter of the boring hole.
  • isolated grouting area that can inject liquid grout is formed at interior of said boring hole.
  • step (S 105 ) is executed to fill by injecting in grouting area liquid grout such as cement milk.
  • step (S 106 ) 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 (S 107 ) to seal grouting area by blocking a discharge passage of air and foreign material is executed.
  • step (S 108 ) 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 33 b , it can fill liquid grout more easily at surrounding said second packing 33 b 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 .
  • 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.
  • 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)
  • Bulkheads Adapted To Foundation Construction (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
US10/284,967 2002-06-22 2002-10-31 Packing apparatus for pressure type soil-nailing and soil-nailing construction method using the packing apparatus Abandoned US20030235472A1 (en)

Applications Claiming Priority (2)

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KR2020020018948U KR200290351Y1 (ko) 2002-06-22 2002-06-22 압력식 쏘일네일링용 패커기
KR20-2002-0018948 2002-06-22

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US (1) US20030235472A1 (ko)
EP (1) EP1375754B1 (ko)
JP (1) JP2004027813A (ko)
KR (1) KR200290351Y1 (ko)
DE (1) DE60232139D1 (ko)

Cited By (11)

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CN102140901A (zh) * 2011-05-13 2011-08-03 中国矿业大学 一种耐高压钻孔密封方法
CN102287163A (zh) * 2011-09-08 2011-12-21 重庆市能源投资集团科技有限责任公司 煤矿井下超高压压裂孔的钻孔封孔方法及封孔装置
CN102747980A (zh) * 2012-07-18 2012-10-24 中国矿业大学 膨胀式多级带压快速封孔技术
CN103742115A (zh) * 2013-12-18 2014-04-23 中国矿业大学 一种煤矿井下压裂密封装置及方法
CN104481450A (zh) * 2014-11-07 2015-04-01 北京中煤矿山工程有限公司 水文孔封孔方法
CN106401524A (zh) * 2016-12-07 2017-02-15 平安煤炭开采工程技术研究院有限责任公司 注浆装置和压裂封孔装置
JP2018193797A (ja) * 2017-05-18 2018-12-06 株式会社ケー・エフ・シー 調整部材及びこれを用いた構造物の施工方法
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
CN112921985A (zh) * 2021-02-02 2021-06-08 河南省远基岩土工程有限公司 一种相邻基坑开挖支护体和支护方法
CN114182738A (zh) * 2021-12-29 2022-03-15 中铁十二局集团建筑安装工程有限公司 一种受限空间基坑开挖支护施工方法
CN116971399A (zh) * 2023-09-22 2023-10-31 中交第一航务工程局有限公司 桥梁主墩承台基坑支护结构及其施工方法

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US8851801B2 (en) 2003-12-18 2014-10-07 R&B Leasing, Llc Self-centralizing soil nail and method of creating subsurface support
US9273442B2 (en) 2003-12-18 2016-03-01 R&B Leasing, Llc Composite self-drilling soil nail and method
CN100340723C (zh) * 2005-05-23 2007-10-03 邓敬森 边坡加固方法
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US7384217B1 (en) 2007-03-29 2008-06-10 Barrett Robert K System and method for soil stabilization of sloping surface
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
KR101018867B1 (ko) * 2008-05-06 2011-03-04 이재일 가압 그라우팅을 위한 재사용 패커
KR100934196B1 (ko) * 2009-03-06 2009-12-24 주식회사 도담이앤씨 양방향 압력식 소구경 파일 및 이를 이용한 부력방지 공법
KR100925677B1 (ko) 2009-06-30 2009-11-10 그린이엔지 주식회사 복합 사면 안정 공법
CN102041812B (zh) * 2009-10-22 2012-03-07 宁晋生 一种三角形布置钢筋的注浆土钉
KR101143609B1 (ko) * 2010-01-26 2012-05-09 주식회사 프라임씨스템 깔때기형 패커와 이를 이용한 압력식 쏘일 네일링 공법
US8376661B2 (en) 2010-05-21 2013-02-19 R&B Leasing, Llc System and method for increasing roadway width incorporating a reverse oriented retaining wall and soil nail supports
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CN102296603B (zh) * 2011-06-02 2013-06-05 北京科技大学 一种锚杆(锚索)用止浆塞及止浆系统
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KR101394985B1 (ko) * 2012-08-28 2014-05-19 양재이엔지 주식회사 터널 그라우팅 장치를 이용한 터널 보강공법
CN103498687B (zh) * 2013-09-04 2015-10-21 中国矿业大学 一种注浆锚杆的封孔装置及方法
KR101771670B1 (ko) * 2015-07-10 2017-08-29 주식회사 장평건설 지중 삽입용 그라우팅 장치 및 공법
CN105239586B (zh) * 2015-11-05 2017-04-12 云南省建设投资控股集团有限公司 一种采用支撑结构支护基坑的方法
CN105696599B (zh) * 2016-02-06 2018-06-12 北京市勘察设计研究院有限公司 一种通过利用气囊封堵装置的加压注浆方法
KR20170125457A (ko) * 2016-05-04 2017-11-15 공학봉 전단저항력 향상기능을 갖는 압력식 쏘일 네일링 공법 및 이를 이용한 절토부 패널식 옹벽

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102140901A (zh) * 2011-05-13 2011-08-03 中国矿业大学 一种耐高压钻孔密封方法
WO2012155696A1 (zh) * 2011-05-13 2012-11-22 中国矿业大学 一种耐高压钻孔密封方法
CN102287163A (zh) * 2011-09-08 2011-12-21 重庆市能源投资集团科技有限责任公司 煤矿井下超高压压裂孔的钻孔封孔方法及封孔装置
CN102747980A (zh) * 2012-07-18 2012-10-24 中国矿业大学 膨胀式多级带压快速封孔技术
CN103742115A (zh) * 2013-12-18 2014-04-23 中国矿业大学 一种煤矿井下压裂密封装置及方法
CN104481450A (zh) * 2014-11-07 2015-04-01 北京中煤矿山工程有限公司 水文孔封孔方法
CN106401524A (zh) * 2016-12-07 2017-02-15 平安煤炭开采工程技术研究院有限责任公司 注浆装置和压裂封孔装置
JP2018193797A (ja) * 2017-05-18 2018-12-06 株式会社ケー・エフ・シー 調整部材及びこれを用いた構造物の施工方法
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
CN112921985A (zh) * 2021-02-02 2021-06-08 河南省远基岩土工程有限公司 一种相邻基坑开挖支护体和支护方法
CN114182738A (zh) * 2021-12-29 2022-03-15 中铁十二局集团建筑安装工程有限公司 一种受限空间基坑开挖支护施工方法
CN116971399A (zh) * 2023-09-22 2023-10-31 中交第一航务工程局有限公司 桥梁主墩承台基坑支护结构及其施工方法

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EP1375754A2 (en) 2004-01-02
JP2004027813A (ja) 2004-01-29
EP1375754A3 (en) 2004-09-15
EP1375754B1 (en) 2009-04-29
KR200290351Y1 (ko) 2002-09-27
DE60232139D1 (de) 2009-06-10

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