EP0435823A1 - Treillis pour couvertures en béton - Google Patents

Treillis pour couvertures en béton Download PDF

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Publication number
EP0435823A1
EP0435823A1 EP90810994A EP90810994A EP0435823A1 EP 0435823 A1 EP0435823 A1 EP 0435823A1 EP 90810994 A EP90810994 A EP 90810994A EP 90810994 A EP90810994 A EP 90810994A EP 0435823 A1 EP0435823 A1 EP 0435823A1
Authority
EP
European Patent Office
Prior art keywords
lattice girder
belt
lattice
cross
hollow profile
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Withdrawn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
EP90810994A
Other languages
German (de)
English (en)
Inventor
Jean Bernold
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0435823A1 publication Critical patent/EP0435823A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04—Lining with building materials
    • E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/065—Light-weight girders, e.g. with precast parts

Definitions

  • the invention relates to a lattice girder for concrete linings on rock walls, with at least three belt bars, which are rigidly connected to each other by a strut to form a triangular or quadrangular cross section.
  • the concrete is either spray-applied after the installation of lattice girders and reinforcement grids, or it is poured in after the formwork elements have been installed on profiled steel girders at a distance from the rock wall behind them.
  • the profiled steel girders which are more resilient, are not suitable for shotcrete.
  • the invention has for its object to find a lattice girder of the type mentioned, which has a considerably increased load capacity at a relatively low weight, so that it is suitable both for the concrete spraying method and for the concrete shell construction.
  • This object is achieved according to the invention in that at least one outer belt rod facing the rock wall has a hollow profile, the space enclosed by the hollow profile being larger than the cross-sectional size of the other belt rods.
  • lattice girders 1-6 serve to secure the rock by correspondingly to the progressive Tunnel excavation in the circumferential direction of the tunnel cross section can be mounted on the rock wall 8.
  • individual arch-shaped carrier elements are firmly connected to one another in the circumferential direction at their ends to form a supporting arch.
  • This work is made considerably easier by its low weight in relation to its strength.
  • Another advantage is that, due to their strength and structure, they can be used not only for inclusion in shotcrete, but also as a support for formwork and reinforcement elements to absorb the loads that occur when the formwork is backfilled.
  • the lattice base structure formed from round steel material is combined to a limited extent with a rolled profile which consists of a hollow profile with a high section modulus.
  • the outer belt rod 9 facing the rock wall 8 is formed from a steel sheet which is curved in cross section, so that its outside is rounded and its cross-sectional legs 10, 11 form a continuation of the triangular cross-sectional shape of the lattice girder.
  • the strut elements 13, 14 that connect this belt bar 9 with the two inner belt bars via welding points also run in the same plane as its cross-sectional leg 10, 11.
  • the cross-sectional size of the outer belt rod 9 having the hollow cross-section is selected taking into account the relatively large sheet thickness so that the static center of gravity lies in the middle of the cross-section of the beam.
  • the length of the straight part of the cross-sectional leg of the outer belt rod 9 is in the range of 20 to 40% of the straight side length of the cross section of the beam.
  • the strut elements 13, 14 either consist of individual round steel bars inclined in the longitudinal direction of the girder bars 9, 16, 17 or they are bent from a strand material in a wave or zigzag shape, so that they are in this form between the belt bars 9, 16 or 9.17 back and forth, as is known per se from FR-A-1.098.003.
  • individual strut elements 19-21 are provided at regular intervals, which run perpendicular to the belt bars 16, 17 and enclose them in a bow-like manner from the inside of the beam cross section.
  • the bent ends 23 of the strut elements 19 can protrude outward from the cross-section of the beam in order to attach a reinforcement grid 24 to them.
  • the reinforcing mesh 24 is attached to the lattice girder 2.
  • the lower right part of the cross-sectional view of FIG. 2 shows an embodiment in which the strut elements 19 enclose the belt bars 16, 17 in the form of a flat ring.
  • formwork and reinforcement grids 26 are attached to the strut elements connecting the inner belt rods 16, 17, as shown in FIGS. 1, 3, 5 and 6, which are made from a combination of coarse-mesh girder lattice and fine-mesh formwork lattice consist.
  • separate formwork and reinforcement lattices (27) are provided, which have strut brackets 28 at regular intervals, the hook-shaped bent ends 29, 30 of which are arranged opposite one another inner straps 17, 16 of adjacent lattice girders 2 can be hooked in as shown in FIG. 5.
  • the preferably outer belt rod 32 facing the rock face or two outer belt rods 33, 34 can be designed as a perforated tube which has a filler neck 36 protruding inwards from the concrete lining 35 , 37 is connected for a cement mixture.
  • an injection material i.e. a cement mixture in the or the tubular belt rods 32-34
  • these are filled so that their strength increases.
  • the injection material is pressed through numerous holes 38, 39 into the surrounding shotcrete mass, so that voids remaining through the formation of splash shadows are filled and a concrete supporting arch of increased quality is created by a force-fitting connection with the rock wall 8.
  • a closure cap 50 prevents concrete mass from flowing back after completion.
  • the two outer and two inner belt rods 33, 34, 40, 41 of the embodiment of the lattice girder 6 according to FIG. 9 are connected to one another in four cross-sectional directions by strut elements 42 to 45 running in two diagonal and two mutually parallel planes.
  • the filler neck 37 has two branches 47, 48 in a V-shaped arrangement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Lining And Supports For Tunnels (AREA)
EP90810994A 1989-12-29 1990-12-17 Treillis pour couvertures en béton Withdrawn EP0435823A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH467689A CH680379A5 (fr) 1989-12-29 1989-12-29
CH4676/89 1989-12-29

Publications (1)

Publication Number Publication Date
EP0435823A1 true EP0435823A1 (fr) 1991-07-03

Family

ID=4280533

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810994A Withdrawn EP0435823A1 (fr) 1989-12-29 1990-12-17 Treillis pour couvertures en béton

Country Status (2)

Country Link
EP (1) EP0435823A1 (fr)
CH (1) CH680379A5 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2791074A1 (fr) * 1999-03-19 2000-09-22 Desquenne & Giral Procede, armature coffrante et cintre pour realiser un parement
CN106640146A (zh) * 2017-03-07 2017-05-10 安徽理工大学 三维钢筋网架与混凝土组合衬砌结构

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR75216E (fr) * 1958-08-04 1961-05-12 Perfectionnements aux poutrelles métalliques composites pour planchers en béton armé
CH356582A (de) * 1959-02-20 1961-08-31 Anderegg Ernst Gitterträger
DE1484111A1 (de) * 1963-02-12 1969-01-09 Bau Ingenieurbuero Dipl Ing Wi Stahlleichttraeger
DE1559459A1 (de) * 1964-05-04 1970-03-05 Ainedter Ing Othmar Montagesteifes Bewehrungselement fuer Stahlbeton-Bauelemente
DE2427168A1 (de) * 1974-06-05 1975-12-11 Julius Georg Stefan Dip Keller Gittertraeger zum bewehren von betonplatten
CH615728A5 (en) * 1977-02-14 1980-02-15 Amberg Rudolf Supporting and securing arrangement in cavities, hard headings or on rock sections
EP0027896A2 (fr) * 1979-10-30 1981-05-06 Kaiser-Omnia Bausysteme Vertriebsgesellschaft mbH Elément de panneau rigide préfabriqué et procédé pour sa fabrication
DE3236569A1 (de) * 1982-10-02 1984-04-05 Ruhrkohle Ag, 4300 Essen Verbundausbau

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR75216E (fr) * 1958-08-04 1961-05-12 Perfectionnements aux poutrelles métalliques composites pour planchers en béton armé
CH356582A (de) * 1959-02-20 1961-08-31 Anderegg Ernst Gitterträger
DE1484111A1 (de) * 1963-02-12 1969-01-09 Bau Ingenieurbuero Dipl Ing Wi Stahlleichttraeger
DE1559459A1 (de) * 1964-05-04 1970-03-05 Ainedter Ing Othmar Montagesteifes Bewehrungselement fuer Stahlbeton-Bauelemente
DE2427168A1 (de) * 1974-06-05 1975-12-11 Julius Georg Stefan Dip Keller Gittertraeger zum bewehren von betonplatten
CH615728A5 (en) * 1977-02-14 1980-02-15 Amberg Rudolf Supporting and securing arrangement in cavities, hard headings or on rock sections
EP0027896A2 (fr) * 1979-10-30 1981-05-06 Kaiser-Omnia Bausysteme Vertriebsgesellschaft mbH Elément de panneau rigide préfabriqué et procédé pour sa fabrication
DE3236569A1 (de) * 1982-10-02 1984-04-05 Ruhrkohle Ag, 4300 Essen Verbundausbau

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2791074A1 (fr) * 1999-03-19 2000-09-22 Desquenne & Giral Procede, armature coffrante et cintre pour realiser un parement
CN106640146A (zh) * 2017-03-07 2017-05-10 安徽理工大学 三维钢筋网架与混凝土组合衬砌结构
CN106640146B (zh) * 2017-03-07 2020-02-07 安徽理工大学 三维钢筋网架与混凝土组合衬砌结构

Also Published As

Publication number Publication date
CH680379A5 (fr) 1992-08-14

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