EP1520936A2 - Bohrverfahren und Vorrichtung - Google Patents

Bohrverfahren und Vorrichtung Download PDF

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Publication number
EP1520936A2
EP1520936A2 EP04012264A EP04012264A EP1520936A2 EP 1520936 A2 EP1520936 A2 EP 1520936A2 EP 04012264 A EP04012264 A EP 04012264A EP 04012264 A EP04012264 A EP 04012264A EP 1520936 A2 EP1520936 A2 EP 1520936A2
Authority
EP
European Patent Office
Prior art keywords
ground
jetting
nozzle
ground improvement
nozzles
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Withdrawn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
EP04012264A
Other languages
English (en)
French (fr)
Other versions
EP1520936A3 (de
Inventor
Yoshinobu Eiko Sangyo Co. Ltd. Koiwa
Yoko Eiko Sangyo Co. Ltd. Koiwa
Hideo Eiko Sangyo Co. Ltd. Yano
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.)
Daiei Sangyo Co Ltd
Original Assignee
EIKO SANGYO CO Ltd
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 EIKO SANGYO CO Ltd filed Critical EIKO SANGYO CO Ltd
Publication of EP1520936A2 publication Critical patent/EP1520936A2/de
Publication of EP1520936A3 publication Critical patent/EP1520936A3/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Withdrawn legal-status Critical Current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
    • 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
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil

Definitions

  • This invention relates to a boring method and apparatus able to construct piles of a prescribed diameter and enables mud waste generated in the formation process to be disposed of as surplus earth.
  • ground When building structures and carrying out earthworks on ground that is soft, the ground is first improved prior to the construction work. Usually this is done by impregnating the earth with a material that hardens the ground.
  • the boring machine comprises a body unit, also called the bore unit, that raises, lowers and rotates a spindle, a multi-cylinder rod that supports the spindle, a high-pressure pump for high-pressure delivery of the ground hardening material that has been mixed by a mixer and agitator, a hydraulic unit that operates the high-pressure pump, a compressor that entrains air into the ground hardening material delivered by the high-pressure pump, and a water tank from which water is pumped to the mixer.
  • the multi-cylinder rod is rotated and raised by the bore unit, the mixture of hardening material and air is expelled at high pressure from nozzles provided on a monitor portion at the lower end of the rod.
  • Patent Document No. 1 Patent No. 2717503
  • Patent Document No. 2 Patent No. 2844184
  • the earth and the ground hardening material are mixed by the hardener material and air being jetted into the ground from nozzles, which gives rise to an air-junction effect that causes the cement milk used as the ground hardener to be sucked out of the borehole.
  • the hardener material in the ground is sucked out of the borehole before it hardens.
  • the ground is not impregnated with the hardener to a sufficient distance so the pile thus formed has a diameter that is smaller than the planned diameter.
  • the mud discharged from the borehole together with the cement milk has to be treated as industrial waste, making the site work more complicated and costly.
  • This invention was accomplished to overcome these shortcomings of the prior art by providing a boring method and apparatus able to promote hardening of the ground hardener and prevent outflow of ground hardener material to thereby construct piles of a prescribed diameter and enable mud waste generated in the formation process to be disposed of as surplus earth.
  • a first aspect of the invention provides a boring method for improving ground and constructing a pile of a prescribed diameter in which a multi-cylinder rod is advanced into the ground and rotated and raised from its position in the ground while the ground is agitated by high-pressure jets of a ground improvement medium having cement milk as its main component from nozzles provided on the multi-cylinder rod, said method comprising:
  • a second aspect of the invention provides a boring method, wherein the ground improvement region is cut by jetting compressed air and water from the upper jetting nozzles until the lower jetting unit reaches the ground improvement region, after which the ground improvement medium is jetted from the first nozzle of the lower jetting unit and the reagent is jetted from the second nozzle.
  • a third aspect of the invention provides a boring method, wherein the reagent is water-glass based sodium silicate.
  • the invention also attains the above objects by providing a boring apparatus for improving ground and constructing a pile of a prescribed diameter in which a multi-cylinder rod is advanced into the ground and rotated and raised from its position in the ground while the ground is agitated by high-pressure jets of a ground improvement medium having cement as its main component from nozzles provided on the multi-cylinder rod, said apparatus comprising:
  • the nozzle from which the ground improvement medium is jetted is positioned higher than the nozzle from which the reagent is jetted.
  • FIG. 1 shows a boring machine that uses the method of the invention
  • Figures 2 (a) and (b) show the monitor portion of the boring machine.
  • boring machine 1 includes a drive unit 2 that incorporates a hydraulic pump, and a bore unit 4 that raises and lowers and rotates a multi-cylinder rod 3.
  • the lower end of the multi-cylinder rod 3 is coupled to a monitor section 5.
  • the monitor section 5 is composed of four cylinders 51, 52, 53 and 54 that are concentrically associated with the multi-cylinder rod 3 and are raised, lowered and rotated with the rod 3.
  • the upper and lower parts of the monitor section 5 are each provided with pairs of nozzles 61 and 62, and 71 and 72; the upper and lower nozzles are, for example, spaced 1 to 2 meters apart.
  • the upper nozzles 61 and 62 are provided on the outer cylinders 51 and 52 of the monitor section 5, and the lower nozzles 71 and 72 are provided on the inner cylinders 53 and 54.
  • the upper nozzles 61 and 62 are provided facing away from each other on opposite sides of the monitor section 5, and are used to supply water under very high pressure from between the cylinders 52 and 53, and compressed air from between the cylinders 51 and 52.
  • the inner cylinders 53 and 54 extend further downwards than the outer cylinders 51 and 52.
  • the nozzle 71 is in communication with the inside of the cylinder 54 to supply a ground improvement medium in which the main component is cement.
  • the nozzle 72 is in communication with the space between the cylinders 53 and 54 to supply a reagent that hardens a ground improvement medium in which the main component is cement milk.
  • Water-milk based sodium silicate can be used as the reagent that hardens the cement milk.
  • a solution can be prepared in which the ratio of sodium silicate to water is 30 to 50%.
  • the multi-cylinder rod 3 is used to bore a hole of a prescribed depth in the ground 8. Then, the multi-cylinder rod 3 is rotated as it is raised at a prescribed speed, for example 1 meter each 15 or 16 minutes. While this is happening, jets of compressed air and high-pressure water 9 are emitted from the upper nozzles 61 and 62, cutting the ground 8, as shown in Figure 3. The lifting effect around the rod 3 causes mud waste 10 produced by the cutting of the ground 8 to be discharged from the borehole 11 to the surface.
  • the cement-based ground improvement medium and the reagent are not yet sprayed from the nozzles 71 and 72.
  • ground improvement medium 12 having cement milk as the main component starts jetting into the agitated ground 81 from the lower nozzle 71, and at the same time a reagent 13 that hardens the cement milk starts jetting from the lower nozzle 72 ( Figure 4).
  • the reagent 13 jetted from the nozzle 72 is water-glass based sodium silicate, and it is jetted into the ground continuously or at intervals.
  • a monitor section 15 according to another aspect of the invention is illustrated by Figure 7, in which other parts that are the same as those in Figure 2 have been given the same reference numerals.
  • nozzles 71 and 72 are located at different heights so that jetting of the reagent 13 from the nozzle 72 takes place a set time after the ground improvement medium 12 is jetted from the nozzle 71. To some extent, this ensures that the reagent 13 is fully mixed with the ground improvement medium 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Soil Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Piles And Underground Anchors (AREA)
EP04012264A 2003-10-02 2004-05-24 Bohrverfahren und Vorrichtung Withdrawn EP1520936A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003379126 2003-10-02
JP2003379126A JP3626972B1 (ja) 2003-10-02 2003-10-02 噴射攪拌工法および噴射攪拌装置

Publications (2)

Publication Number Publication Date
EP1520936A2 true EP1520936A2 (de) 2005-04-06
EP1520936A3 EP1520936A3 (de) 2006-03-15

Family

ID=34309310

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04012264A Withdrawn EP1520936A3 (de) 2003-10-02 2004-05-24 Bohrverfahren und Vorrichtung

Country Status (2)

Country Link
EP (1) EP1520936A3 (de)
JP (1) JP3626972B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017172279A (ja) * 2016-03-25 2017-09-28 小野田ケミコ株式会社 地盤改良用高圧噴射撹拌装置および地盤改良方法
FR3088942A1 (fr) * 2018-11-27 2020-05-29 Soletanche Freyssinet Procédé de traitement d’un sol
EP3744902A3 (de) * 2019-05-27 2021-02-17 Clivio S.r.l. Verfahren zur verfestigung eines untergrunds
CN115198739A (zh) * 2022-08-17 2022-10-18 建基集团地下空间河湖整治研发中心有限公司 一种高压旋喷桩的施工方法及使用的高压旋喷参数监测系统装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4648764B2 (ja) * 2005-05-31 2011-03-09 大栄産業株式会社 噴射攪拌工法および噴射攪拌装置
US7874766B2 (en) 2008-07-10 2011-01-25 Daiei Sangyo Co., Ltd. Jet-mixing method and jet-mixing apparatus
JP7058154B2 (ja) * 2018-03-23 2022-04-21 ライト工業株式会社 高圧噴射攪拌工法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1558694A (en) * 1977-08-10 1980-01-09 Kajima Corp Consolidation of underground masses
DE7119195U (de) * 1971-05-17 1980-10-23 Ichise, Yoshio, Setagaya, Tokio Vorrichtung zum ausgiessen mit hochdruckstrahl
DE3743507A1 (de) * 1987-12-22 1989-07-06 Klemm Bohrtech Verfahren und vorrichtung zur herstellung von pfaehlen im erdreich
JPH11241064A (ja) * 1997-12-22 1999-09-07 Sekisui Chem Co Ltd 地盤注入用薬液及び地盤への薬液注入工法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7119195U (de) * 1971-05-17 1980-10-23 Ichise, Yoshio, Setagaya, Tokio Vorrichtung zum ausgiessen mit hochdruckstrahl
GB1558694A (en) * 1977-08-10 1980-01-09 Kajima Corp Consolidation of underground masses
DE3743507A1 (de) * 1987-12-22 1989-07-06 Klemm Bohrtech Verfahren und vorrichtung zur herstellung von pfaehlen im erdreich
JPH11241064A (ja) * 1997-12-22 1999-09-07 Sekisui Chem Co Ltd 地盤注入用薬液及び地盤への薬液注入工法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 14, 22 December 1999 (1999-12-22) & JP 11 241064 A (SEKISUI CHEM CO LTD), 7 September 1999 (1999-09-07) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017172279A (ja) * 2016-03-25 2017-09-28 小野田ケミコ株式会社 地盤改良用高圧噴射撹拌装置および地盤改良方法
FR3088942A1 (fr) * 2018-11-27 2020-05-29 Soletanche Freyssinet Procédé de traitement d’un sol
WO2020109682A1 (fr) * 2018-11-27 2020-06-04 Soletanche Freyssinet Procede de traitement d'un sol
US11982064B2 (en) 2018-11-27 2024-05-14 Soletanche Freyssinet Method for treating soil
EP3744902A3 (de) * 2019-05-27 2021-02-17 Clivio S.r.l. Verfahren zur verfestigung eines untergrunds
CN115198739A (zh) * 2022-08-17 2022-10-18 建基集团地下空间河湖整治研发中心有限公司 一种高压旋喷桩的施工方法及使用的高压旋喷参数监测系统装置

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Publication number Publication date
JP3626972B1 (ja) 2005-03-09
EP1520936A3 (de) 2006-03-15
JP2005113647A (ja) 2005-04-28

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