EP0496926A1 - Grabenfräse - Google Patents

Grabenfräse Download PDF

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Publication number
EP0496926A1
EP0496926A1 EP91101361A EP91101361A EP0496926A1 EP 0496926 A1 EP0496926 A1 EP 0496926A1 EP 91101361 A EP91101361 A EP 91101361A EP 91101361 A EP91101361 A EP 91101361A EP 0496926 A1 EP0496926 A1 EP 0496926A1
Authority
EP
European Patent Office
Prior art keywords
milling
cutter
trench
milling cutters
rotation
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Withdrawn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
EP91101361A
Other languages
English (en)
French (fr)
Inventor
Giosuè Miotti
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.)
Ctr - Consulenti Tecnico-Commerciali Riuniti Sas Di Miotti Anna E C
Original Assignee
Ctr - Consulenti Tecnico-Commerciali Riuniti Sas Di Miotti Anna E C
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 Ctr - Consulenti Tecnico-Commerciali Riuniti Sas Di Miotti Anna E C filed Critical Ctr - Consulenti Tecnico-Commerciali Riuniti Sas Di Miotti Anna E C
Priority to EP91101361A priority Critical patent/EP0496926A1/de
Publication of EP0496926A1 publication Critical patent/EP0496926A1/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Withdrawn legal-status Critical Current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
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/13—Foundation slots or slits; Implements for making these slots or slits
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/20—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels
    • E02F3/205—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels with a pair of digging wheels, e.g. slotting machines

Definitions

  • the present invention relates to a trench cutter having a milling head and a supporting frame, which milling head is mounted to the support frame and includes at least one rotatable milling cutter.
  • Such trench cutters are used e.g. for excavation work where long and deep slots are excavated in the ground and filled thereafter. Such slots are excavated at construction procedures known as diaphragm wall technique and as slurry trench technique.
  • the critical components of these trench cutters are the milling heads with the milling cutters.
  • the generally known milling heads have, however, a number of drawbacks.
  • the milling heads include generally two milling cutters mounted side-by-side on a common axis. This axis extends perpendicularly to a supporting plate at which the milling cutters are suspended, which supporting plate extends vertically between the two drum shaped milling cutters. Due to this plate an area exists at the bottom of the trench being excavated in the ground which cannot be reached by the milling cutters or their tools, respectively, leaving an elongated ridge at the bottom of the trench. When the ground is of a soft material, this ridge may be crushed by the supporting plate.
  • the material which has been loosened by the milling cutters is transported off together with the scavenging slurry by means of e.g. an air lift or a pumping device. Since the milling heads and the center supporting plate of the known designs occupy the entire front face area of the milling head, the intake of the mouth piece of the pipe for removing the material and the slurry must be located someplace above the milling cutters and, therefore, a considerable distance away from the area where the actual working of the soil occurs. Accordingly, the milled off material must be moved past the drum-shaped milling cutters, a procedure which not only consumes energy but also adds to the abrasion of the milling tools.
  • the slurry being pumped off includes about only 3% milled off material which obviously means that enormous amounts of scavenging slurry must be circulated and that the advancing of the milling is rather small.
  • the invention as claimed is intended to provide a remedy. It solves the problem of how to design a trench cutter in which the area to be worked is completely swept by the milling cutters, in that the milling cutters are supported to pivot relative to the supporting frame thereof.
  • the advantages offered by the invention are mainly that the complete surface area of the soil to be removed is acted upon by the milling cutter tools, further that the intake of the suction pipe is located in a zone where the slurry transporting the milled off matter flows and not at a location where the freshly fed slurry which has not come into contact with the milled off matter is present.
  • the trench cutter illustrated in Fig. 1 comprises a milling head 1 which includes in this specific example two pairs of counterrotating milling cutters 3, 4 and 5, 6 arranged in a tandem-like sequence. It shall be noted, however, that this arrangement is exemplary only and other arrangements, e.g. only one pair of milling cutters, are foreseen, too.
  • the milling head 1 is mounted to a support frame 7 suspended from the jib 8 of a construction machine 9.
  • Reference numeral 10 denotes in this specific example the pump for the removal of the scavenging slurry and milled off material which is fed through a conduit 17 for removal at a corresponding site.
  • other devices such as an air lift device can be utilized in place of the pump 10.
  • the trench being excavated by the trench cutter is identified by the reference numeral 11.
  • Fig. 2 illustrating a front view of the milling head with parts partly cut away, and, for a better understanding, also to Fig. 7 of the drawings.
  • Fig. 2 specifically shows the milling head in an operational position in a trench 11.
  • the center area 14 of the trench 11 is not worked by the two milling cutters 3, 4 when they are in the illustrated position, which position, by the way, is typical for the designs of the prior art.
  • Both milling cutters 3, 4 are now mounted to a pivot arm, i.e. milling cutter 3 to the pivot arm 15 and milling cutter 4 to the pivot arm 16.
  • These pivot arms 15, 16 are generally platelike structures such as e.g. designed in Fig. 6. Since the designs regarding the left and the right hand side of Fig. 2 are the same, the here following description is confined to the left half of Fig. 2.
  • Pivot arm 15 is pivotably mounted to a framelike intermediate support structure 18. To this end, the pivot arm 15 has upwards projecting lugs 38 and the intermediate support structure downwards projecting lugs 19, and the interconnection therebetween is made by a horizontally extending bolt 39.
  • This intermediate support structure 18 carries an actuator e.g. in form of a hydraulic piston/cylinder device 20. The lower end of its piston rod 21 is provided with a lug 22.
  • a linkage arm 23 is hinged at the one end to the lug 22 and at the other end to the pivot arm 15, which has a recess 40 for receipt of the linkage arm 23.
  • the pivot arm 15 is connected to a spring 26 which rests against a projection 27 of the intermediate support structure 18.
  • the purpose of this spring 26 is to dampen the oscillating movements of the pivot arm 15.
  • the two milling cutters 3, 4 can sweep and work accordingly the entire bottom area of the trench 11 in that they oscillate between the position illustrated in Fig. 2 and the position illustrated in Fig. 3 such that no elongated center ridge remains at the bottom of the trench 11 and also that rocks and rubble located in this center area are also worked and milled by the milling cutters.
  • the intermediate support structure 18 can be an integral part of the support frame 7 or, as disclosed in this embodiment can be in turn pivotably mounted to the support frame 7. This arrangement will now be described based mainly on Figs. 2 and 6.
  • the intermediate support structure 18 includes along one of its upper edges lugs 28, via which it is hinged to complementary lugs 29 of the support frame 7.
  • Actuators 30, again e.g. hydraulic piston/cylinder devices, are hinged at the one end to webs 31 (Fig. 7) of the support structure 7 and at the other end to lugs 32 (Fig. 6) of the intermediate support structure 18. Accordingly, the intermediate support structure 18 can pivot around a pivot axis 33 extending perpendicularly to the pivot axis 24 of the pivot arm 14 and 15.
  • milling cutters 3, 4 this means that they can also pivot forward upwards seen in the direction of advance of the milling operation such that not only the bottom of the trench 11 but additionally at least a part of the vertical face surface of the trench 11 can be completely swept by the two milling cutters 3, 4.
  • the pump 10 is supported on the intermediate support structure 18. Its outlet is connected to the discharge conduit 17 leading to the site where the slurry and the excavated material are treated in accordance with any technique commonly known in this art.
  • the inlet of the pump 10 is connected to a suction tube 34.
  • This suction tube 34 extends curvilinearly ending at the intake end 35 which is located lower than the axes of rotation 12, 13 of the milling cutters 3, 4.
  • this tube 34 and the intake end are located in a space area within the envelope defined by the circumference of the milling cutters and not outside or above, respectively, thereof.
  • This feature and specifically the location of the intake end 35 is possible due to the novel design of the suspension of the milling cutters, namely by the two pivot arms 15, 16, between which there now is a space for accommodating the suction tube 34.
  • the pivot arms 15, 16 have a recess or cut-out 36, respectively, such that they do not interfere with the tube 34 in their closed position e.g. according to Fig. 5. Because this intake end 35 of the suction tube 34 is at a low location below the axes of rotation of the milling cutters, they and specifically their tools are in operation along a much smaller section of the circumference of the milling cutters immersed in the scavenging slurry and in the milled off material such that their wear is considerably decreased and accordingly also less power is necessary for their operation. Also, in a given volume of scavenging slurry a much higher percentage of milled off matter than hitherto possible will be dragged along such that for a given operation a smaller amount of scavening slurry must be circulated.
  • the milling head 1 includes two contra-rotating milling cutter pairs 3, 4 and 5, 6 such as illustrated in Fig. 1 and also indicated in Fig. 4, which are arranged in a tandem-like sequence.
  • the pivoting initiated by the actuators 30 is such that the milling cutter pairs, seen in the longitudinal direction of the trench, can move somewhat away from each other and thereafter again towards each other; in other words, the milling cutter pairs can be controlled to spread in the longitudinal direction of the trench being excavated.
  • the milling cutters 3, 4 and 5, 6 are of a design incorporating a motor having a fixed rotor and a rotating stator, a design which is generally known in this technical field.
  • the motors can be of any known design, may such be electric, hydraulic or any other kind. They may be of low speed or equipped with mechanical reducers such that they can be designed with a stationary housing and a rotating hub instead of a fixed hub and a rotating housing. It can be a variable speed motor or connected to a variable speed reducing unit.
  • the working tools 37 of the milling cutters can be rock bits or kennemetal picks or teeth, or other tools, depending from the quality of the soil to be worked.
  • the milling cutters Due to the small width the milling cutters can be brought to act with a higher pressure per surface unit onto the ground surface to be milled, thus enabling the use of rock bits, but at the same time due to the pivoting movement of the milling cutters the width of the trench being excavated can be kept as broad as hitherto possible with the previously known milling head designs.
EP91101361A 1991-02-01 1991-02-01 Grabenfräse Withdrawn EP0496926A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP91101361A EP0496926A1 (de) 1991-02-01 1991-02-01 Grabenfräse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91101361A EP0496926A1 (de) 1991-02-01 1991-02-01 Grabenfräse

Publications (1)

Publication Number Publication Date
EP0496926A1 true EP0496926A1 (de) 1992-08-05

Family

ID=8206359

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101361A Withdrawn EP0496926A1 (de) 1991-02-01 1991-02-01 Grabenfräse

Country Status (1)

Country Link
EP (1) EP0496926A1 (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0716190A1 (de) * 1994-12-09 1996-06-12 Wirth Maschinen- und Bohrgeräte-Fabrik GmbH Schlitzfräse
EP0735199A1 (de) * 1995-03-28 1996-10-02 Bauer Spezialtiefbau GmbH Schlitzwandfräse
DE19754399A1 (de) * 1997-12-09 1999-06-17 Juergen Posch Vorrichtung zur Bearbeitung einer länglichen Vertiefung im Erdreich
DE19838513C2 (de) * 1997-09-20 2000-06-29 Wolfgang Zeilinger Schlitzwandfräse
US6429250B1 (en) 1998-12-11 2002-08-06 Targor Gmbh Talc-reinforced polypropylene molding composition with high impact strength
EP1486620A1 (de) * 2003-06-11 2004-12-15 Compagnie Du Sol Fräswerkzeug zur Herstellung von Schlitzen, das ein schnelles Wechseln des Schneidekopfes zulässt.
US7367143B2 (en) 2004-08-12 2008-05-06 Bauer Maschinen Gmbh Cutter and method for working the soil
US7572859B2 (en) 2002-06-26 2009-08-11 Basell Polyolefine Italia S.R.L. Impact-resistant polyolefin compositions
US7700690B2 (en) 2002-06-26 2010-04-20 Basell Poliolefine Italia S.R.L. Impact-resistant polyolefin compositions
US8039540B2 (en) 2004-06-08 2011-10-18 Basell Poliolefine Italia S.R.L. Polyolefin composition having a high balance of stiffness, impact strength and elongation at break and low thermal shrinkage
EP2378002A1 (de) 2010-04-16 2011-10-19 BAUER Maschinen GmbH Fräsvorrichtung zum Erstellen vertikal verlaufender Schlitze im Boden
US8058350B2 (en) 2003-11-06 2011-11-15 Basell Poliolefine Italia, s.r.l. Polypropylene composition
RU2705984C1 (ru) * 2019-02-20 2019-11-14 Федеральное государственное бюджетное учреждение науки Хабаровский Федеральный исследовательский центр Дальневосточного отделения Российской академии наук (ХФИЦ ДВО РАН) Способ разработки маломощных наклонных жил
US11519153B2 (en) 2017-09-25 2022-12-06 Soletanche Freyssinet Boring machine for producing a non-rectilinear trench

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3683522A (en) * 1970-04-13 1972-08-15 Louis Rousseau Frustoconical rotary cutter for digging trenches
FR2211027A5 (de) * 1972-12-14 1974-07-12 Soletanche
DE2655317A1 (de) * 1976-12-07 1978-06-08 Schymura Heinz Juergen Elektromotor mit feststehender welle und umlaufendem gehaeuse
EP0109907A2 (de) * 1982-11-19 1984-05-30 SOLETANCHE Société Anonyme dite: Vorrichtung zur Sicherstellung der senkrechten Lage von Bohreinrichtungen
DE3602387C1 (de) * 1986-01-28 1987-06-04 Hochtief Ag Hoch Tiefbauten Vorrichtung zum Einbringen eines im wesentlichen vertikalen Bodenschlitzes
DE3805868A1 (de) * 1988-02-25 1989-09-07 Hochtief Ag Hoch Tiefbauten Seilgefuehrter schlitzwandgreifer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3683522A (en) * 1970-04-13 1972-08-15 Louis Rousseau Frustoconical rotary cutter for digging trenches
FR2211027A5 (de) * 1972-12-14 1974-07-12 Soletanche
DE2655317A1 (de) * 1976-12-07 1978-06-08 Schymura Heinz Juergen Elektromotor mit feststehender welle und umlaufendem gehaeuse
EP0109907A2 (de) * 1982-11-19 1984-05-30 SOLETANCHE Société Anonyme dite: Vorrichtung zur Sicherstellung der senkrechten Lage von Bohreinrichtungen
DE3602387C1 (de) * 1986-01-28 1987-06-04 Hochtief Ag Hoch Tiefbauten Vorrichtung zum Einbringen eines im wesentlichen vertikalen Bodenschlitzes
DE3805868A1 (de) * 1988-02-25 1989-09-07 Hochtief Ag Hoch Tiefbauten Seilgefuehrter schlitzwandgreifer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 466 (M-772)(3313) December 7, 1988 & JP-A-63 189 526 (TONE BORING ) *

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0716190A1 (de) * 1994-12-09 1996-06-12 Wirth Maschinen- und Bohrgeräte-Fabrik GmbH Schlitzfräse
EP0735199A1 (de) * 1995-03-28 1996-10-02 Bauer Spezialtiefbau GmbH Schlitzwandfräse
DE19838513C2 (de) * 1997-09-20 2000-06-29 Wolfgang Zeilinger Schlitzwandfräse
DE19754399A1 (de) * 1997-12-09 1999-06-17 Juergen Posch Vorrichtung zur Bearbeitung einer länglichen Vertiefung im Erdreich
US6085446A (en) * 1997-12-09 2000-07-11 Posch; Juergen Device for excavating an elongated depression in soil
DE19754399C2 (de) * 1997-12-09 2002-04-25 Juergen Posch Vorrichtung zur Bearbeitung einer länglichen Vertiefung im Erdreich
US6429250B1 (en) 1998-12-11 2002-08-06 Targor Gmbh Talc-reinforced polypropylene molding composition with high impact strength
US7700690B2 (en) 2002-06-26 2010-04-20 Basell Poliolefine Italia S.R.L. Impact-resistant polyolefin compositions
US7572859B2 (en) 2002-06-26 2009-08-11 Basell Polyolefine Italia S.R.L. Impact-resistant polyolefin compositions
US7114271B2 (en) 2003-06-11 2006-10-03 Compagnie Du Sol Cutting tool for digging trenches, and enabling the cutter head to be changed quickly
JP2005002785A (ja) * 2003-06-11 2005-01-06 Compagnie Du Sol 切削工具
FR2856088A1 (fr) * 2003-06-11 2004-12-17 Cie Du Sol Outil de fraisage pour la realisation de tranchees, permettant un changement rapide de la tete de coupe
EP1486620A1 (de) * 2003-06-11 2004-12-15 Compagnie Du Sol Fräswerkzeug zur Herstellung von Schlitzen, das ein schnelles Wechseln des Schneidekopfes zulässt.
JP4503360B2 (ja) * 2003-06-11 2010-07-14 コンパニー ドゥ ソル 切削工具
US8058350B2 (en) 2003-11-06 2011-11-15 Basell Poliolefine Italia, s.r.l. Polypropylene composition
US8039540B2 (en) 2004-06-08 2011-10-18 Basell Poliolefine Italia S.R.L. Polyolefin composition having a high balance of stiffness, impact strength and elongation at break and low thermal shrinkage
US7367143B2 (en) 2004-08-12 2008-05-06 Bauer Maschinen Gmbh Cutter and method for working the soil
DE102005017093B4 (de) * 2004-08-12 2008-07-24 Bauer Maschinen Gmbh Fräse und Verfahren zur Bearbeitung des Erdbodens
EP2378002A1 (de) 2010-04-16 2011-10-19 BAUER Maschinen GmbH Fräsvorrichtung zum Erstellen vertikal verlaufender Schlitze im Boden
US8640364B2 (en) 2010-04-16 2014-02-04 Bauer Maschinen Gmbh Cutting device for producing vertically running trenches in the ground
US11519153B2 (en) 2017-09-25 2022-12-06 Soletanche Freyssinet Boring machine for producing a non-rectilinear trench
RU2705984C1 (ru) * 2019-02-20 2019-11-14 Федеральное государственное бюджетное учреждение науки Хабаровский Федеральный исследовательский центр Дальневосточного отделения Российской академии наук (ХФИЦ ДВО РАН) Способ разработки маломощных наклонных жил

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