SE442654B

SE442654B - Prefabricated foundation beam

Info

Publication number: SE442654B
Application number: SE8403031A
Authority: SE
Inventors: Johnny Johansson
Original assignee: Johnny Johansson
Priority date: 1984-06-06
Filing date: 1984-06-06
Publication date: 1986-01-20
Also published as: SE8403031D0; SE8403031L

Abstract

This invention concerns a prefabricated foundation beam for houses, intended to be mounted on separate pressure plates etc. and designed to be dimensioned for the appropriate primary bending stresses caused by its own weight and usable load from the building resting on the foundation beam, and for the appropriate secondary bending stresses which can arise while it is being worked on, handled and fitted.The prefabricated foundation beam consists of two longitudinally parallel construction units (1) and (2), consisting of concrete beams reinforced with sheet metal sections (3), the upper one with Z- or L- shaped cross-section and the lower one with L- or I- shaped cross section, designed to withstand appropriate primary and secondary bending stresses, and, between these construction units (1) and (2), a pre-cast thin mesh- or fibre-reinforced concrete plate (4) designed to be the waist of the I shaped beam which has construction units(1) and (2) as flanges, and to provide support for the earth employed. The prefabricated foundation beam further consists of an appropriate number of fastening components (5) for fixing and spacing the sheet metal sections (3) in the body of the casting, and for application of any lifting devices when the finished foundation beam is handled.<IMAGE>

Description

10 15 20 25 30 8403031-1 och 2 , tunnplåtprofiler armerade betongbalkar, kens långsidor löpande konstruktionsenheter 1 bestående av med den övre med Z- eller L-liknande tvärsektion den undre med L- eller I-liknande tvärsektion, avsedda att klara uppkom- mande primära och sekundära böjspänningar, samt en mellan dessa konstruktionsenheter gjuten tunn rut- eller fiber- armerad betongskiva avsedd att utgöra balkliv i den I-lik- nande balkongkonstruktion som har konstruktionsenheterna 1 och 2 diga jordmassorna. som flänsar, samt att utgöra stöd för de utvän- Grundbalk enligt föreliggande uppfinning uppvisar en rad fördelar jämfört med förut kända grundbalkar för samma an- vändningsområde nämligen: låg egenvikt på grund av att balklivets tjocklek endast behöver göras 80_- 100 m egenvikten kan sänkas ytterligare på grund av att lättballastbetong med volymvikter ner mot 1100 kg/m3 kan utnyttjas låg materialkostnad på grund av att betong med låg tryckhållfasthet kan användas samt att ett lågt armeringsinnehâll kan utnyttjas. 10 15 20 25 30 8403031-1 and 2, sheet metal profiles reinforced concrete beams, kens long sides continuous construction units 1 consisting of with the upper with Z- or L-like cross section the lower with L- or I-like cross-section, intended to withstand primary and secondary bending stresses, as well as an intermediate these structural units cast thin checkered or fibrous reinforced concrete slab intended to form beam life in the I-like balcony construction which has the construction units 1 and 2 diga the soil masses. as flanges, as well as to support the external The foundation beam according to the present invention has a row advantages over previously known basic beams for the same turning area namely: low dead weight due to the thickness of the beam life only need to be made 80_- 100 m the dead weight can be further reduced due to lightweight ballast concrete with volume weights down to 1100 kg / m3 can be used low material cost due to concrete with low compressive strength can be used as well as a low reinforcement content can be used.

Uppfinningen kommer att beskrivas närmare nedan i anslutning till bifogade ritningar som visar en utföringsform av upp- finningen, och på vilka sifferbeteckningen l visar den i balkens övre längsgående kant, Z- eller L-liknande konstruk- tionsenhet som tillsammans med den L- eller I-liknande konstruktionsenheten i balkens undre längsgående kant, med sifferbeteckningen 2, är avsedd att motstå uppkommande vertikala och horisontella, primära och sekundära böjpåkän- ningar. 10 8403031-1 Tunnplåtprofilerna med sifferbeteckningen 3 är armerings- enheter som är en förutsättning för grundbalkens ringa be- tongtvärsnitt. Balklivet med sifferbeteckningen 4 kan på grund av att det till övervägande delen endast utsätts för tryckkrafter armeras med enkel rutarmering eller fi- berarmering.The invention will be described in more detail below in connection to the accompanying drawings which show an embodiment of the finding, and on which the numeral 1 indicates it in upper longitudinal edge of the beam, Z- or L-like construction unit together with the L- or I-like unit the structural unit in the lower longitudinal edge of the beam, with the numeral 2, is intended to withstand emerging vertical and horizontal, primary and secondary bending stresses nings. 10 8403031-1 The sheet metal profiles with the numeral designation 3 are reinforcing units which is a prerequisite for the basic tongue cross section. The beam life with the number designation 4 can on due to the fact that it is predominantly only exposed for compressive forces is reinforced with simple window reinforcement or fi- reinforcement.

Infästningselementen med sifferbeteckningen 5 används för att distansera och fixera tunnplâtprofilerna i formen vid gjutning samt för applicering av lyftredskap vid hantering av den färdiga grundbalken.The fastening elements with the numeral designation 5 are used for to distance and fix the sheet metal profiles in the mold at casting and for application of lifting gear during handling of the completed basic code.

Claims

10 15 20 25 30 8403031-1 Patent claim l. Reinforced concrete prefabricated foundation beam for house buildings, intended to be mounted or similar, and therefore intended to be dimensioned for pre- on separate pressure plates or primary bending stresses caused by dead weight and useful load from the building resting on the foundation beam, as well as for any secondary bending stresses that may arise during manufacture, handling and assembly, characterized by two parallel construction units (1) and (2) running along the long sides of the beam, consisting of sheet metal profiles (3) reinforced concrete beams, the upper with Z- or L-like cross-section the lower with L- or I-like cross-section, intended to withstand emerging primary and secondary bending stresses, and a thin window cast between these structural units U) and (2) or fiber-reinforced concrete slab (4) intended to form beam beams in the I-like beam structure having the structural units (1) and (2) as flanges, and provide support for the external soil masses, further consisting of the required number of fastening elements (5) for fixing and spacing the sheet metal profiles (3) in the mold when casting, and for applying lifting gear when handling the finished base beam.

Base beam according to Claim 1, characterized in that the sheet metal profiles (3) are provided with a punched-out pattern suitable for adhesion to the concrete prior to installation.

Base beam according to claims 1 and 2, characterized in that the concrete in the beam consists of light-ballast concrete.

Base beam according to claims 1, 2 and 3, characterized in that a rigid insulating material (6) is attached via adhesive and or cast joints to static interaction with the concrete slab (4).