MONOLITHIC R.C. WALLS

Transcription

1 Building Constructions 6. 3rd Lecture MONOLITHIC R.C. WALLS Dr. Bálint Petró Prof. Emeritus Gergely Dobszay Lecturer Zsuzsanna Fülöp Lecturer Dr. Miklós Kézdi Miklós Svéd

2 Formwork Types for In-situ Reinforced Concrete 2 1. Formwork panel systems 3. Creeping formworks moved in increments 2. Sliding formworks moved without dismount 4. Tunnel shuttering

3 The Effect of Shuttering on the Floorplan Layout 3 1. Panel-type formwork Box-like layout

4 1. Formwork Panel Systems 4 Large wall formwork panels are removed by crane from the outside Smaller slab formwork panels are removed manually through the openings

5 Formwork Panel Systems 5 PERI Modul Slab Formwork, Duna Tower PERI Vario Wall Formwork, Germany

6 Formwork Panel Systems - Walls 6 DOKA Top 50 tri-ply saturated softwood panel glued timber I beam supports DOKA AluFramax Laminated timber panels with plastic foil Extuded aluminum alloy supports

7 Formwork Panel Systems - Walls 7 Story-high wall formwork panels Independent floor slab shuttering Positioning: top and bottom guide rails, Vertical adjustment: wedges Wind pressure: bracing Horizontal pressure of concrete: spacers

8 Formwork Panel Systems Columns and Beams 8 Glued-laminated timber formworks for beams Column formworks

9 Formwork Panel Systems Floor Slabs 9 PERI Slab Formwork Modul-coordinated Custom timber formwork around column

10 Formwork Panel Systems Floor Slabs 10 PERI drop-head slab formwork Ready for use Dismounting

11 Formwork Panel Systems 11 Up-to-date systems allow complex building geometries Vertical loadbearing elements (e.g. walls, columns) are no longer distinguishable

12 RC Technology - influenced Details 12 Up-to-date formworks Concreting next to neighbouring building Concrete permanent shutter-body Creeping formwork

13 RC Technology - influenced Details 13 Connection grooves and pockets Space for moving the formwork Crane acces Formwork removal and rotation Concrete inlets become pillars that are removed later

14 RC Technology - influenced Details 14 tunnel sh., large formwork panels: simultaneously creeping formwork: subsequently pockets removable inserts ready-made products hard to join monolithic to prefab. elements prefab. connection elements are concreted in

15 RC Details Zipper Re-bars 15 Connecting structures built in different construction phases

16 RC Details Connection Grooves and Pockets 16 Custom formwork keeps concrete out at connection points

17 RC Staircase Construction phases: walls monolithic landing prefabricated stair flights 17 pockets landing stair flight stair flight

18 RC Stair Flight 18 monolithic, with supporting beams, built subsequently prefabricated (even with covering)

19 RC Stair Flight 19 Acoustic dampening at flight-to-landing connection

20 RC Foundation Beam 20 Strip foundation with RC foundation ringbeam: distribution of loads connection to wall bracing of thin RC wall wall-to-foundation connection

21 RC Foundation Beam 21 RC foundation beams Supports excenric loads Waterproofing membrane layouts

22 External Walls of RC Buildings 22 External wall choice depends on RC construction method: similar all around or different endwalls and elevations tunnel shuttering sanwitch panel or lightweight wall panel monolithic RC external wall thermal insulation + plaster or ventilated composites residential buildings: curtain walls are not suitable contemporary office buildings: free-form RC walls + window strips or curtain wall Differences between RC skeleton frames and wall-type loadbearing systems diminsh Thermal insulation + plaster systems Thermal insulation is reinforced at corners

23 External Külső Walls falak of RC Buildings 23?

24 RC Buildings - Finishings windows, doors: formwork or dummy frames interior finishing: quick construction, no wet technology storey-high partition wall panels, later drywall floors: soft contact-type, then floated, now false floors MEP: directly into the concrete? pipes for electric wires are concreted in plumbing and water pipes: vertical. ducts, above false ceiling 24 Edge protection Concrete-cosmetics, internal renderings

25 The Effect of Shuttering on the Floorplan Layout Tunnel shuttering Transversal wall system, open elevations

26 4. Tunnel Shuttering 26 Floor slab and walls are made simultaneously Shuttering is pulled out at the elevation Bracing walls are cast later into connection grooves

27 Tunnel Shuttering 27 Cross-section of formwork unit

28 Tunnel Shuttering 28 Longitudinal section showing cantilevering elevation scaffold

29 External Walls Sandwitch Panel 29 Sized to fit the loadbearing elements Window Cantilever

30 External Walls Sandwitch Panel Cantilevering steel beam supports the panel 30 Wrong solution Neoprene support Cantilever

31 Creeping Formwork 31 Mostly applied for staircase blocks that brace skeleton frame buildings Floor slabs are constructed subsequently using formwork lowering technology

32 Creeping Formwork 32 Thoma Formwork System: Support rod remains in place, Internal-external scaffold Synronized electro-hydraulic elevator units Initially constructed without intermediate horizontal structure

33 Sliding Formwork 33 Shuttering moved in increments For large scale constructions

34 Sliding Formwork 34 Formwork kit pair of given height The previously completed RC section supports the new construction level Constructing the pier of a highway bridge

35 Sliding Formwork 35 Constructing the pier of a highway bridge

36 Sliding Formwork 36 Formwork of monolithic RC beam bridge creeping forward Formwork of turbine tunnel of hydroelectric station