EP1741836A1 - Verfahren und Vorrichtung zur in-situ Herstellung einer Schmalwand - Google Patents

Verfahren und Vorrichtung zur in-situ Herstellung einer Schmalwand Download PDF

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Publication number
EP1741836A1
EP1741836A1 EP06012793A EP06012793A EP1741836A1 EP 1741836 A1 EP1741836 A1 EP 1741836A1 EP 06012793 A EP06012793 A EP 06012793A EP 06012793 A EP06012793 A EP 06012793A EP 1741836 A1 EP1741836 A1 EP 1741836A1
Authority
EP
European Patent Office
Prior art keywords
bits
rods
soil
excavation
mixing
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Withdrawn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
EP06012793A
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English (en)
French (fr)
Inventor
Davide Trevisani
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.)
Soilmec SpA
Original Assignee
Soilmec SpA
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 Soilmec SpA filed Critical Soilmec SpA
Publication of EP1741836A1 publication Critical patent/EP1741836A1/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Withdrawn legal-status Critical Current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
    • 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
    • E02D19/00—Keeping dry foundation sites or other areas in the ground
    • E02D19/06—Restraining of underground water
    • E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
    • E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
    • 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
    • E02D3/126—Consolidating by placing solidifying or pore-filling substances in the soil and mixing by rotating blades

Definitions

  • the subject of the invention is equipment and a method for mixing in loco for the formation of curtains, cutoff walls or similar diaphragms.
  • the aggregating fluid is pumped at a pressure of 20-40 MPa and exits from special nozzles in the form of a jet with extremely high kinetic energy, which contributes markedly to the disgregation and mixing with the soil.
  • the disgregating blades move in a mix already rendered soft by the action of the jets and can turn with less effort and at a higher speed, and guarantee a minimum diameter of the column and a high rate of advance (see, for example, the publications EP-1.045.073 and US-5.396.964 ).
  • the purpose of the present invention is the construction of diaphragms of soil consolidated by means of mixing with aggregating fluids, characterized by an excellent mixing quality and by a rate of advance enhanced by the action of jets with high kinetic energy.
  • the invention proposes providing equipment for mixing in loco for the formation of diaphragms according to Claim 1 and a method for carrying out mixing in loco for the formation of diaphragms using said equipment according to Claim 11.
  • the excavation equipment carried by the machine 9 consists of a plurality of vertical and parallel drilling rods 10 that perform a rotary motion about their own axes in opposed pairs, in the sense that each rod 10 turns in a direction opposite to the adjacent ones.
  • bits 13 Arranged within a quadrilateral (rectangular) caisson 12 are bits 13 which, being fixed each to the bottom end of the rods 10, turn the first in a clockwise direction, the second in a counterclockwise direction, and so forth.
  • Each bit comprises, starting from the bottom up:
  • the fixed structure is also equipped with mixing members 19 in positions interspersed with respect to those 18 of the blade 17, so as to entrap and break down (grind) the debris of larger dimensions.
  • a second mixing blade 20 is set between the fixed structure 16 and the disgregating blade 14.
  • Mixing members 21 are positioned under the second blade 20, and similar mixing members 22 are positioned under the fixed structure so that they too can entrap and break down (grind) the debris of larger dimensions.
  • First radial nozzles 23 conveniently find space for their accommodation between the disgregating blade 14 and the first mixing blade 17.
  • Second radial nozzles 24 are set in a downward direction under the disgregating blade 14. Both the first nozzles 23 and the second nozzles 24 turn together with the bits.
  • the nozzles 23 and 24 are supplied with an aggregating fluid that arrives, through channels inside the rods 10, as far as the set of bits 11.
  • the set of bits 11 is, at least in part, enclosed in the caisson 12 constituted by a perimeter of vertical metal plates that delimit a rectangular section of excavation.
  • the diameter of the blades is such as to excavate partially overlapping columns of diameter substantially equal to the smaller side of the rectangular section.
  • the areas at the four extreme corners 25 and the areas 26 not excavated by the bits, but in any case comprised within the rectangle, are demolished by the radial jets 23 of aggregating fluid, the position of which in height is at the level of the bottom rim 27 of the perimetral metal plates.
  • the jets reach with their action up against said metal plates and are by these hindered or limited.
  • the high kinetic energy with which the fluid is sprayed through the nozzles 23 and 24 is a determining factor in demolishing the soil in the «dead» areas-of the caisson 12.
  • motor means 28 Arranged at the top end of the rods 10 (see Figures 1 and 2), substantially as far as the envisaged depth of the excavation, are motor means 28 and means of synchronism 29 (for example gears) designed to impart on the rods rotation at the same speed and each in a direction opposite to the adjacent ones.
  • synchronism 29 for example gears
  • the device is substantially balanced to rotation.
  • the power-drive assembly is then guided on a tower-guide 30 that prevents undesirable rotation thereof.
  • the height of said guide constitutes a limit to the depth of treatment that can be reached.
  • the rods 42 are decidedly shorter than the depth of excavation, but carry once again at their free ends the set of bits 11 previously described and contained within the caisson 12.
  • the assembly 40 comprising the motors 28 and the means of synchronism (gears) 29 (they bear the same reference numbers as in Figures 1 and 2 since they correspond thereto) is then immersed in the mixture of soil and aggregating fluid and hangs from ropes 43 for the vertical movement of sinking and extraction. In this way the depths that can be reached are decidedly greater.
  • milling systems 44 capable of disgregating the aforesaid obstacles and enabling extraction of the equipment from the ground.
  • a known guide device For the orientation of the system at the start of excavation a known guide device is used. It is constituted by an external guide 45 hanging from the machine (crane), with hollow prismatic cross section, and an internal guided element 46, also with prismatic cross section.
  • the external guide is orientable by means of a motor-driven assembly 47 at the point of suspension.
  • the two guides 45 and 46 are engaged. At greater depths, the device becomes independent and guides itself along the walls of the excavation made.
  • For control of the direction of excavation guide devices 48 are used, which are also known, such as for example those described in the patent No. EP-0.791.690 .
  • drums 27 Located in the external guide are drums 27 for winding thereon hydraulic pipes 28 (or electrical cables) that supply power for the device.
  • Figures 8, 9 and 10 show a variant of the embodiment of Figures 6 and 7, in which, in order not to create an obstruction of the section of excavation, the mechanical means of synchronism 29 are eliminated and replaced with known (hydraulic or electrical) systems 50 for controlling the speed of the various motors 28.
  • Said systems do not ensure a perfect synchronism, so that the bits of the device 11 must have blades arranged at different heights to prevent any accidental interference.
  • motors 28 are located at different heights to facilitate the vertical movements of the device within the mixture of soil and aggregating fluid.
  • the lateral rods 42' are longer than the central ones 42'' (which are almost inexistent), so that the central motors 28'' will be located lower than the lateral ones 28'.
  • the set of bits 11 has - unlike what has been described with reference to Figures 3, 4 and 5 - two fixed overlapping and parallel structures 16' and 16''.
  • the set of bits carried by the left-hand long rod 42' and the one carried by the right-hand short rod 42" can be sent back in 51 by the top structure 16" and be carried by the bottom structure 16' so as to project further on the outside of the caisson 12, but at the same time as not to interfere with the individual bits of the set of bits carried by the right-hand long rod 42' and the one carried by the left-hand short rod 42", which, instead, are carried by the top structure 16" and sent back in 52 by the bottom one 16'.
EP06012793A 2005-06-28 2006-06-22 Verfahren und Vorrichtung zur in-situ Herstellung einer Schmalwand Withdrawn EP1741836A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000447A ITTO20050447A1 (it) 2005-06-28 2005-06-28 Attrezzatura e metodo di miscelazione in sito per la formazione di diaframmi.

Publications (1)

Publication Number Publication Date
EP1741836A1 true EP1741836A1 (de) 2007-01-10

Family

ID=36729256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06012793A Withdrawn EP1741836A1 (de) 2005-06-28 2006-06-22 Verfahren und Vorrichtung zur in-situ Herstellung einer Schmalwand

Country Status (4)

Country Link
US (1) US20070014637A1 (de)
EP (1) EP1741836A1 (de)
JP (1) JP2007009685A (de)
IT (1) ITTO20050447A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9091035B2 (en) * 2012-09-05 2015-07-28 Dewind One-Pass Trenching, Llc System and method of forming an underground slurry wall
BE1021266B1 (nl) * 2014-03-03 2015-10-13 Asenco Nv Bewerking van bulkgoederen tijdens het transport
CN105386479B (zh) * 2015-12-10 2022-12-06 中电建铁路建设投资集团有限公司 移动式钻凿导向定位装置及钻凿导向定位方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59106623A (ja) * 1982-12-06 1984-06-20 Tomoyoshi Shinohara 地中切削軸
JPS61196015A (ja) * 1985-02-22 1986-08-30 Kobe Steel Ltd 軟弱地盤改良装置
GB2270329A (en) * 1992-08-10 1994-03-09 Cementation Piling & Found Forming a hole in the ground
US5417522A (en) * 1993-09-23 1995-05-23 S. M. W. Seiko Soil fragmentation members and multiple lateral support structures for improved soil mixing and efficient boring for use on multi-shaft auger soil mixing apparatus
EP0663475A1 (de) * 1994-01-14 1995-07-19 Sondages Injections Forages "S.I.F." Entreprise Bachy Vorrichtung zur vor Ort-Herstellung von Pfählen aus verfestigter und verdichteter Erde
JPH10292362A (ja) * 1997-04-11 1998-11-04 Takenaka Doboku Co Ltd 地盤改良用の多軸同期装置及びこれを利用した多軸混合処理機とケーシングパイプ式地盤改良装置
JP2003275563A (ja) * 2002-03-26 2003-09-30 Hitachi Constr Mach Co Ltd 土砂攪拌装置
EP1359257A1 (de) * 2002-05-02 2003-11-05 BAUER Maschinen GmbH Bohrvorrichtung und Verfahren zum Erstellen einer Bohrung im Boden

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4909675A (en) * 1988-08-24 1990-03-20 Osamu Taki In situ reinforced structural diaphragm walls and methods of manufacturing
JPH07119462B2 (ja) * 1991-11-15 1995-12-20 大商新基株式会社 地盤改良用攪拌装置及びそれを使用した地盤改良工法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59106623A (ja) * 1982-12-06 1984-06-20 Tomoyoshi Shinohara 地中切削軸
JPS61196015A (ja) * 1985-02-22 1986-08-30 Kobe Steel Ltd 軟弱地盤改良装置
GB2270329A (en) * 1992-08-10 1994-03-09 Cementation Piling & Found Forming a hole in the ground
US5417522A (en) * 1993-09-23 1995-05-23 S. M. W. Seiko Soil fragmentation members and multiple lateral support structures for improved soil mixing and efficient boring for use on multi-shaft auger soil mixing apparatus
EP0663475A1 (de) * 1994-01-14 1995-07-19 Sondages Injections Forages "S.I.F." Entreprise Bachy Vorrichtung zur vor Ort-Herstellung von Pfählen aus verfestigter und verdichteter Erde
JPH10292362A (ja) * 1997-04-11 1998-11-04 Takenaka Doboku Co Ltd 地盤改良用の多軸同期装置及びこれを利用した多軸混合処理機とケーシングパイプ式地盤改良装置
JP2003275563A (ja) * 2002-03-26 2003-09-30 Hitachi Constr Mach Co Ltd 土砂攪拌装置
EP1359257A1 (de) * 2002-05-02 2003-11-05 BAUER Maschinen GmbH Bohrvorrichtung und Verfahren zum Erstellen einer Bohrung im Boden

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 224 (M - 331) 13 October 1984 (1984-10-13) *
PATENT ABSTRACTS OF JAPAN vol. 011, no. 025 (M - 556) 23 January 1987 (1987-01-23) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 02 26 February 1999 (1999-02-26) *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) *

Also Published As

Publication number Publication date
ITTO20050447A1 (it) 2006-12-29
US20070014637A1 (en) 2007-01-18
JP2007009685A (ja) 2007-01-18

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