DE2531344A1 - Insulated concrete sheathed layered silo walls - use sliding formwork for site erection and insulating panel insertion - Google Patents

Abstract

The wall structure is multi-layered for high temperature-loaded silo construction. It comprises two or more outer reinforced-concrete shells and at least one heat-insulating intervening layer. Sliding formwork is used in erection. During the sliding process both concrete shells are erected in situ. The insulating layer is then inserted in the sliding framework, in prefabricated panel form, and held firmly in position. A constantly extended retaining structure may be used for this, until the concrete sets hard. Subsequently the two concrete shells are kept at the correct spacing, but, are free to move vertically.

Description

Multi-layer wall construction produced in sliding formwork The invention relates to a method for producing a multi-layer wall construction, Primarily for silo construction under high temperatures, with at least two wall thicknesses delimiting outer reinforced concrete shells and at least one arranged therebetween Intermediate layer, in the form of a thermal insulation layer, and a holding structure for Implementation of this procedure.

It is known to make multilayered structures slide produce that prefabricated panels with insulation layer attached to them in ground the sliding formwork and only one, namely the load-bearing concrete shell the wall construction is concreted on the spot during the sliding process. Another option is to use only the load-bearing structure in in-situ concrete as a sliding structure to produce and subsequently to hang two-layer elements.

In the construction methods described above, imnier only carries a concrete shell, while the second is used to decorate or protect the intermediate layer. Mainly However, in the case of silos subject to thermal stress, it is necessary to support both concrete shells to train.

The outer shell supports the structure and delimits it outside and minimizes the silo pressure, while the inner shell absorbs the frictional forces of Vertilcalcales forces originating from the silo must lead downwards. Different Movements of one shell in relation to the other resulting from different levels of warming may come from, be possible. The known methods are for such structures not suitable.

The object of the invention is that in the silo and bunker construction in particular Economical sliding construction, also for those made up of several concrete shells Walls of high temperature silos to be able to use, where the outer Wall horizontal and vertical, the inner one, the thermal insulation layer against the silo protective fleton shell, must transmit at least vertical forces. The task is achieved in that the second concrete shell with in-situ concrete in the sliding formwork will be produced.

Both shells are created as monolithic in the vertical direction, not subdivided structures, of which, however, the inner one in the horizontal direction can be subdivided by eyes as required.

To carry out the method, a support structure for the Intermediate layer (thermal insulation layer) needed to meet several requirements Has. You must 1. the intermediate layer (thermal insulation layer) against buoyancy and unintentional Keep shifting safely during the concreting and sliding process, 2. different Allow movements of the two concrete shells, 3. the concrete shells on a constant Keep a distance from each other, 4. Pressures acting normal to the shell surface from the temperature-stressed silo inside, which because of their vcrtical joints no can absorb horizontal forces, on the horizontal tensile forces absorbing Transfer the shell to the outside of the silo. This is the intermediate layer of normal pressures relieved in connection with the relative swings of the concrete shells Temperature lead to the destruction of the intermediate layer.

The invention is illustrated by illustrations.

It shows Fig. T the horizontal section through an inventive Wall piece. Between the concrete inner shell lying on the temperature-stressed side 1 and the load-bearing concrete outer shell 2 is the intermediate layer (heat insulation) 3 arranged. The concrete shell 1 is divided by vertical joints 4 to create horizontal ones To enable temperature expansions without constraint.

The distance between the concrete shells 1 and 2 for the intermediate layer 3 is secured by spacers 5 which can slide between the plates 6. The plates 6 simultaneously form the holder for the intermediate layer 3 during the Concreting process. Anchors 7 hold cover plates 8 which prevent the joints 4 from penetrating of silo goods. Anchor rails 8 are embedded in the outer shell 2, in which the armature 7 are movably guided. Guide plate 9 in the anchor rails hold the elastic intermediate layer 10 for the joints 4 firmly in their position and force the sliding movement of the armature 7. By the sliding plate 11 different Movements of the edges of the intermediate layer 3 waxed unscädlich.

FIG. 2 wall detail with vertical section through a joint 4, FIG. 3 wall detail with anchor 7.

Claims (8)

Claims Process for the production of a multi-layer wall construction, primarily for silo structures subject to high temperatures with two limiting wall thicknesses Reinforced concrete shells and at least one intermediate layer arranged therebetween, d a it is clear that both concrete shells with in-situ concrete during of the sliding process and the intermediate layer (thermal insulation layer) in Prefabricated slab shape set in the sliding formwork and in a suitable manner is held firmly in place. 2. Multi-layer wall construction according to claim 1, d a d u r c h It is not noted that one lengthened with the sliding progress of the wall Holding structure the intermediate layer (thermal insulation layer) during manufacture up to Hardening of the concrete against buoyancy and unintentional shifting in its position fixed and later in use the two wall-delimiting concrete shells at a distance holds, and that they have an independent movement of the concrete shells in a vertical direction Direction allows. 3. Support structure according to claim 2, d a d u r c h g e k e n n z e i c h n e t that spacers in the form of profile iron between the concrete shells are arranged which, by transferring the compressive forces between the concrete shells, Relieve the intermediate layer (thermal insulation) from pressure. 4. holding structure according to claims 2 and 3, d a d u r c h g e k e It is noted that the spacers are slidably disposed between the concrete shells are. 5. Support structure according to claims 2 to 4, since dur c h gek e n n z e i c h ne t that the possibility of sliding between the concrete shells and the spacers is achieved by inserting strips of sheet metal or asbestos cement. 6. Support structure according to claims 2 to 5, d a d u r c h g e k E n n z e i c h n e t that spacer according to claim 3 and sliding plates according to claim 5 together the bracket and support of the intermediate layer (thermal insulation) during installation and form during concreting. 7. Support structure according to claim 2, d a d u r c h e e k e n n z e i c h n e t that fixed vertically displaceably in the outer concrete shell Anchors arranged in the vertical joints of the inner temperature-loaded concrete shell and hold the cover plates that seal the joints against the silo. 8. Support structure according to claim 2 and 7, d a -d u r c h g e k e n n z e i c h n e t that between the anchors according to claim 7 guide plates the elastic intermediate layers in the vertical joints of the temperature-loaded concrete shell include and horizontally immovable and in slots of the outer concrete shell guide vertically sliding and force the sliding movement of the armature according to claim 7. L e r s e i t e