US3793702A - Method of dismantling framework structures - Google Patents

Method of dismantling framework structures Download PDF

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Publication number
US3793702A
US3793702A US00245987A US3793702DA US3793702A US 3793702 A US3793702 A US 3793702A US 00245987 A US00245987 A US 00245987A US 3793702D A US3793702D A US 3793702DA US 3793702 A US3793702 A US 3793702A
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United States
Prior art keywords
structures
primary structure
vertical
dismantling
auxiliary
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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 - Lifetime
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US00245987A
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English (en)
Inventor
N Ahlgren
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Individual
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Individual
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Publication date
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Publication of US3793702A publication Critical patent/US3793702A/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G19/00—Auxiliary treatment of forms, e.g. dismantling; Cleaning devices
    • E04G19/003—Arrangements for stabilising the forms or for moving the forms from one place to another
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00—Material constitution of bridges
    • E01D2101/20—Concrete, stone or stone-like material
    • E01D2101/24—Concrete
    • E01D2101/26—Concrete reinforced
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49815—Disassembling
    • Y10T29/49819—Disassembling with conveying of work or disassembled work part

Definitions

  • the present invention relates to a method of dismantling framework structures or scaffoldings of the type used for building bridges and like constructions of considerable horizontal length, for supporting the shuttering and similar formwork for the construction, said framework structures comprising also vertical structures.
  • the method of the invention is characterised in that the vertical structures are mounted on the building construction by means of jacks, whereupon the lowermost parts of the vertical structures are dismantled at ground level and the vertical structures then are successively lowered to be successively dismantled at ground level.
  • the carrying capacity of the broad building construction is utilised for lowering the vertical structures, and this offers considerable advantages as compared to the use of a free-standing crane which cannot readily reach in under the broad construction.
  • FIG. 1 shows the horizontal beam structures suspended from the bridge
  • FIG. 2 illustrates how the vertical structures are successively lowered from the bridge for their successive dismantlingat ground level
  • FIG. 3 illustrates the lowering of the horizontal beam structures.
  • the vertical structures 2 are first mounted and between them are then positioned the horizontal beam structures 3 for the concrete forms 4 or the like.
  • the framework structure comprising the vertical structures 2 and the horizontal beam structures 3 is to be dismantled, and this is done in accordance with the method of the present invention.
  • the horizontal beam structures 3 are suspended from the bridge 1 by means of bar elements 5, whereupon the vertical structures 2 are suspended from the bridge 1 by means ofjacks 6.
  • the lowermost parts 7 of the vertical structures 2 are dismantled at ground level.
  • the vertical structures 2 are then lowered one stage so that the now lowermost parts 7' can be dismantled at ground level. This operation is repeated by further stages until the entire vertical structure 2 has been dismantled.
  • the jacks 6 are transferred to the bar elements 5 of the horizontal beam structures 3 so that also these structures may be lowered to ground level by means of said jacks.
  • the structure for supporting the form 4 merely comprises vertical structures 2, the operating steps involving the mounting and lowering of the horizontal beam structures 3 naturally are dispensed with.
  • the horizontal beam structures may be mounted together with the vertical structures 2 on the bridge 1 by means of the jacks 6, and then the horizontal beam structures 3 are lowered simultaneously with the vertical structures 2.
  • the hydraulic jacks 6 are used for suspending the framework structures from the construction or bridge 1. These jacks 6 are connected to a common central source 8 of pressure medium sothat all structures can be lowered simultaneously.
  • the invention provides a method fordismantling auxiliary structures such as the vertical structures 2, horizontal beam structures 3, and framework 4 used during the erection of a primary structure such as the bridge ll.
  • this method comprises the steps of connecting the auxiliary structure to the primary structure for overhead support thereby, using means such as the rods 5 and jacks 6; lowering the auxiliary structure from the primary structure while connected thereto and supported thereby to present portions of the auxiliary structure for access within a limited elevation range above a ground reference level; and dismantling those portions of the auxiliary structure presented within said limited elevation range.
  • the limited elevation range into which portionsof the auxiliary structure are lowered is a range which will allow workmen standing on ground reference level to reach and dismantle the portion of the auxiliary structure within such range.
  • the auxiliary structure has a horizontal section, such as represented by beam structure 3 and framework 4 that extends horizontally about the primary structure within a given elevation span located at considerable height above ground reference level.
  • the invention provides for separate overhead support from the primary structure of the horizontal and vertical sections. Accordingly, as is shown in FIGS. 2 and 3 one section of the auxiliary structure can be lowered progressively for dismantling from the bottom up by workmen at ground reference level, while the other section of the auxiliary structure is held in place for lowering and dismantling thereafter.
  • a method of dismantling auxiliary structures used during the'erection of a primary structure which comprises the steps of connecting the auxiliary structure to the primary structure for overhead support thereby, lowering the auxiliary structurefrom the primary structure while connected thereto and supported thereby to present portions of the auxiliary structure for access within a limited elevation range above a ground reference level, and dismantling those portions of the auxiliary structure presented within said limited elevation range.
  • auxiliary structure has a horizontal section that extends horizontally about the primary structure within a limited extends downwardly to said ground referencelevel, Y

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Bridges Or Land Bridges (AREA)
US00245987A 1971-04-29 1972-04-20 Method of dismantling framework structures Expired - Lifetime US3793702A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE05594/71A SE338582B (xx) 1971-04-29 1971-04-29

Publications (1)

Publication Number Publication Date
US3793702A true US3793702A (en) 1974-02-26

Family

ID=20266795

Family Applications (1)

Application Number Title Priority Date Filing Date
US00245987A Expired - Lifetime US3793702A (en) 1971-04-29 1972-04-20 Method of dismantling framework structures

Country Status (4)

Country Link
US (1) US3793702A (xx)
JP (1) JPS5535550B1 (xx)
CA (1) CA964485A (xx)
SE (1) SE338582B (xx)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3927865A (en) * 1973-01-29 1975-12-23 Wikstroem Int Ab Apparatus for lifting of heavy loads
US4064615A (en) * 1976-10-28 1977-12-27 Linden-Alimak Ab Method and device for dismounting or mounting jib sections on a tower crane
FR2760736A1 (fr) * 1997-03-11 1998-09-18 Philippe Devianne Engin de manutention d'une charge tel un plateau de coffrage de pont
ES2197773A1 (es) * 2001-10-23 2004-01-01 Martin Antonio Manuel Ramirez Procedimiento para la construccion de tableros de puentes o similares y los medios utilizados para dicha construccion
ES2212723A1 (es) * 2002-07-04 2004-07-16 Ulma C Y E, S. Coop. Procedimiento de desencofrado para viaductos y dispositivo para ejecucion del mismo.
US20120023840A1 (en) * 2009-04-10 2012-02-02 Bin Yuan Main Work Construction Method for Reinforced Concrete Building and Building Construction Machine
CN102605719A (zh) * 2012-04-17 2012-07-25 江阴大桥(北京)工程有限公司 混凝土预制梁节段拼装及架设的施工方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996284A (en) * 1958-12-15 1961-08-15 Welborn Jack Vernon Shinning jack
US3203669A (en) * 1961-05-17 1965-08-31 Byggforbattring Ab Climbing jack
US3296640A (en) * 1965-11-17 1967-01-10 Wilbur C Gunn Method and apparatus for erecting a bridge structure
US3692446A (en) * 1971-02-11 1972-09-19 Research Corp Apparatus for forming and lifting multi-story columns in one story increments

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996284A (en) * 1958-12-15 1961-08-15 Welborn Jack Vernon Shinning jack
US3203669A (en) * 1961-05-17 1965-08-31 Byggforbattring Ab Climbing jack
US3296640A (en) * 1965-11-17 1967-01-10 Wilbur C Gunn Method and apparatus for erecting a bridge structure
US3692446A (en) * 1971-02-11 1972-09-19 Research Corp Apparatus for forming and lifting multi-story columns in one story increments

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3927865A (en) * 1973-01-29 1975-12-23 Wikstroem Int Ab Apparatus for lifting of heavy loads
US4064615A (en) * 1976-10-28 1977-12-27 Linden-Alimak Ab Method and device for dismounting or mounting jib sections on a tower crane
FR2760736A1 (fr) * 1997-03-11 1998-09-18 Philippe Devianne Engin de manutention d'une charge tel un plateau de coffrage de pont
ES2197773A1 (es) * 2001-10-23 2004-01-01 Martin Antonio Manuel Ramirez Procedimiento para la construccion de tableros de puentes o similares y los medios utilizados para dicha construccion
ES2212723A1 (es) * 2002-07-04 2004-07-16 Ulma C Y E, S. Coop. Procedimiento de desencofrado para viaductos y dispositivo para ejecucion del mismo.
US20120023840A1 (en) * 2009-04-10 2012-02-02 Bin Yuan Main Work Construction Method for Reinforced Concrete Building and Building Construction Machine
US8863474B2 (en) * 2009-04-10 2014-10-21 Bin Yuan Main work construction method for reinforced concrete building and building construction machine
CN102605719A (zh) * 2012-04-17 2012-07-25 江阴大桥(北京)工程有限公司 混凝土预制梁节段拼装及架设的施工方法

Also Published As

Publication number Publication date
CA964485A (en) 1975-03-18
JPS5535550B1 (xx) 1980-09-13
SE338582B (xx) 1971-09-13

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