EP3810870B1 - Tank of prefabricated parts - Google Patents

Description

The invention relates to a precast container, which consists at least partially of precast concrete wall elements standing on a foundation plate and forming vertical joints between them, each standing precast concrete wall element having at least two horizontally arranged cladding tubes, the ends of which are opposite the ends of the cladding tubes of the other precast concrete wall elements. and wherein the cladding tubes accommodate tension strands, via which the prefabricated container is placed under pretension.

Concrete tanks, which are used, for example, as fermenters, water storage tanks, chip silos or water towers, have long been made from in-situ concrete, with a sliding circuit being used to achieve the desired height of the tank. It is true that large heights of the containers can be realized. However, these tanks, which are produced using in-situ concrete construction, are very expensive and production is time-consuming.

For this reason, the prefabricated containers of the generic type are already being produced, in which prefabricated concrete wall elements standing upright on a foundation plate are connected to one another by horizontally arranged circumferential strands and are prestressed. The advantage of this precast container is that the precast parts can be produced quickly, at any time under optimal conditions and cost-effectively in a precast concrete plant, and can be taken to the respective construction site if required.

The shipment of the ready-made concrete wall elements to the appropriate construction site is carried out regularly by means of trucks, which are usually first on move with the normal road network. For this purpose, regulations on the length and width of the trucks and possibly also the height of the trucks must be taken into account. For this reason, precast concrete wall elements with a length, which later represents the height, can be transported from 15 to a maximum of 18 m and widths of a maximum of 4 m, although these are special vehicles. The precast concrete wall elements are usually manufactured in height dimensions of 6 to 12 m and widths of up to 3 m for good transport.

This means that prefabricated containers can be erected at heights of just 6 to 12 m, and a maximum of 18 m. If greater heights of the containers are to be realized for procedural reasons, these can only be produced in the expensive and time-consuming in-situ concrete construction method.

through the DE 10 2009 014 926 A1 already prefab structures of greater height have become known in which the climbing construction method was used. These wind turbine towers are vertically prestressed to absorb the appropriate forces. An internal pressure, as can occur in concrete tanks such as fermenters, liquid manure tanks or water tanks, is not to be expected in these tower structures. Tightness does not have to be taken into account with these tower structures either. This means that these structures cannot be used as prefabricated containers. GB 2 322 901A shows a prefabricated container according to the preamble of claim 1. EP 0 207 337 A1 , WO 2013/029743 A1 , U.S. 3,407,007 A and U.S. 1,370,415 A disclose prefabricated containers which reflect the further state of the art.

The invention is based on the object of further developing generic containers in such a way that heights greater than 15 m can be realized inexpensively and very quickly, and to show an assembly concept which ensures the fast, inexpensive and safe construction of the prefabricated container.

To solve the problem, it is proposed that an even number of prefabricated concrete wall elements standing on the foundation slab be provided, with one half of the standing precast concrete wall elements is only half the height of the second half of the standing precast concrete wall elements, that at least one further full and/or half height precast concrete wall element stands on each of the precast concrete wall elements standing on the foundation plate, that the precast concrete Half-height wall elements have at least two vertically spaced, horizontally arranged cladding tubes and the precast concrete wall elements of the full height have at least four vertically spaced, horizontally arranged cladding tubes, with the at least two or four cladding tubes of adjacent precast concrete wall elements of a precast container being arranged in the same planes, and enclose all-round prestressing strands in each level.

In principle, it is also possible to provide an odd number of precast concrete wall elements standing on the foundation plate. In the area of the then non-changing precast concrete wall element heights, additional measures such as the introduction of not only full-height precast concrete wall elements but also half-height precast concrete wall elements and/or the provision of additional fasteners can be planned for a good hold of the wall .

The full-height precast concrete wall elements can e.g. B. have easily transportable lengths of 10 m and widths of 3 m, while the half-height precast concrete wall elements have only 5 m in length and 3 m in width and are also easy to transport. By erecting the precast concrete wall elements alternately in full length and half length, there are gaps between the full length precast concrete wall elements, in which the easily transportable and also easily tradable full length precast concrete wall elements can be used again. This results in a climbing construction, with which heights of the prefabricated container greater than 15 or 18 m are easily possible, with the precast concrete wall elements being light and without Special permission to transport and are easy to process on site because of their tradable size.

It has been proven that the prestressing strands run at right angles to the respective abutting surface of the precast concrete wall elements from which they protrude.

This ensures that the clamping forces in the area of the joints are always introduced into the wall elements at right angles to the joint surface, so that the joint surfaces are always optimally arranged relative to one another and can absorb the frictional forces between them particularly well and no sliding movements can occur.

It is advantageous if a plurality of cladding tubes accommodating tension strands are provided in the horizontal planes in which the at least two or four cladding tubes are arranged.

As a result, a particularly high density of tendons is made possible by internal and external clamping elements, which can be used for high prefabricated tanks, especially in their lower area, for optimal prestressing adjustment.

It is significant that in the area of the horizontal joints between the prefabricated concrete wall elements a tongue and groove connection is provided which extends essentially over the entire length of the joints. Alternatively, at least two horizontally spaced bolts arranged in recesses in the opposite precast concrete wall elements can also be provided in the area of each horizontal joint between the precast concrete wall elements.

The tongue and groove connection in the area of the horizontal joints, but also the bolts, prevent the precast concrete wall elements standing on top of one another from being able to move against one another unintentionally towards the outside or inside of the container. The tongue and groove connections also ensure better tightness of the container, since the connecting surface between the precast concrete wall elements standing on top of each other and thus the sealing area is increased and liquids, e.g. B. would first have to be pressed upwards in order to then be able to escape on the outer wall.

In order to achieve as uniform a structure as possible for the walls and good sealing of the joints or joints, it has proven useful that both the vertical and the horizontal joints are grouted with injection mortar. In order to achieve even greater safety, it is proposed that the prestressing strands arranged in the cladding tubes be encased and the cladding tubes injected with injection mortar.

This results in an essentially uniform and, above all, tight wall design of the prefabricated container.

Such prefabricated containers can be designed in a round, polygonal or oval shape.

Although this construction, unlike the previously known prefabricated containers, also has horizontal joints in addition to the vertical joints, these prefabricated containers can be made watertight. Contrary to expectations, no vertical tension cords need to be provided for these high prefabricated containers, in contrast to the high towers constructed using the climbing method. The necessary support is achieved by its own weight, pressed joints and the offset of these joints. The following method for the production of the precast container according to the invention is worth imitating, in which, after a foundation slab has been created and set, a ring of upright precast concrete wall elements is arranged on it, with precast concrete wall elements of half length and full length precast concrete wall elements alternating the at least two vertically spaced cladding tubes of the half-height precast concrete wall elements and the lower cladding tubes of the full-height precast concrete wall elements communicating with these prestressing strands are drawn in and the ends of the prestressing strands are connected to one another in a tensionable manner, so that the standing precast concrete wall elements are held by the prestressing strands against one another support, then full-length precast concrete wall elements are then inserted into the gaps between the full-length precast concrete wall elements and secured by tension strands. This process of inserting full-length precast concrete wall elements into the gaps that keep occurring is repeated until the desired height of the precast container is reached. When the desired height of the precast container has been reached, precast concrete wall elements half the height are inserted into the existing gaps between the precast concrete wall elements and again secured by tension strands. After this, both the vertical and horizontal joints and the ducts are filled with injection mortar. After the injection mortar has set, the prestressing strands are tensioned in such a way that the prefabricated container has the desired prestressing, with the prestressing exceeding the internal pressure to be expected when the prefabricated container is used regularly.

Figur 1

den vereinfacht dargestellten unteren Ring eines erfindungsgemäßen Fertigteilbehälters,

Figur 2

eine Teilansicht eines Behälters mit angedeuteten Hüllrohren und Spannlitzen, und

Figur 3

zwei aufeinander angeordnete Fertigbeton-Wandelemente in Seitenansicht und geschnitten.

The invention is explained in more detail with reference to a drawing. It shows:

figure 1

the simplified lower ring of a precast container according to the invention,

figure 2

a partial view of a container with indicated cladding tubes and tension cords, and

figure 3

two precast concrete wall elements arranged one on top of the other in a side view and section.

figure 1 shows a foundation slab 1 in perspective, on which half-height precast concrete wall elements 2 and full-height precast concrete elements 3 alternate. In simplified form, a polygon made up of only eight elements is shown here. The prefabricated containers, for example as water reservoirs, fermenters or liquid manure reservoirs, are usually made of 10 or more, preferably an even number, of prefabricated concrete wall elements which can also have a curvature, so that round containers can be realized.

figure 2 shows a section of a prefabricated container according to the invention. Here 1 precast concrete wall elements half height 2 and full height 3 are arranged alternately on the foundation plate. In turn, full-height precast concrete wall elements 3 are inserted into the gaps between the full-height precast concrete wall elements 3 .

In figure 2 the at least two cladding tubes 4 of the half-height precast concrete wall elements 2 and the at least four cladding tubes 5 of the full-height precast concrete wall elements 3 are also indicated. In the cladding tubes 4 and 5, the tension cords 6 are indicated.

The vertical joints 7 and horizontal joints 8 shown and the cladding tubes 4 and 5 are filled with injection mortar, resulting in a uniform wall 9 which also has no cavities inside in the region of the cladding tubes 4 and 5 .

figure 3 shows a side view and a section of two ready-made concrete wall elements of full height 3 in the area of their horizontal joint 8. The cladding tubes 5, in which the prestressing strands 6 are arranged, can also be seen. Both the horizontal joint 8 and the cladding tubes 5 are filled with injection mortar.

Reference List

1

foundation plate

2

Half height precast concrete wall panel

3

Full height precast concrete wall element

4

cladding tube

5

cladding tube

6

tension cords

7

Vertical joint

8th

Horizontal joint

9

Wall

Claims (9)

1. Prefabricated-part container at least partially consisting of precast-concrete wall elements standing vertically on a foundation plate (1) that are formed between vertical joints (7), wherein each vertical precast-concrete wall element comprises at least two horizontally arranged cladding tubes (5), the ends of which are opposite the ends of the cladding tubes (5) of the other precast-concrete wall elements, and wherein the cladding tubes (5) accommodate tension strands (6) via which the prefabricated-part container is prestressed,

   characterized in that

   a preferably even number of precast-concrete wall elements standing vertically on the foundation plate (1) is provided, wherein half of the vertical precast-concrete wall elements are only half the height (2) of the second half of the vertical precast-concrete wall elements,

   that, on each of the precast-concrete wall elements standing vertically on the foundation plate (1), at least one other precast-concrete wall element stands vertically at full height (3) and/or at half height (2),

   that the precast-concrete wall elements (2) at half height comprise at least two vertically spaced, horizontally arranged cladding tubes (4) and the precast-concrete wall elements at full height (3) comprise at least four vertically spaced, horizontally arranged cladding tubes (5),

   wherein the at least two or four cladding tubes of adjacent precast-concrete wall elements of a prefabricated-part container are arranged on the same respective planes and respectively enclose circumferential tension strands (6) on each plane.
2. Prefabricated-part container according to Claim 1, characterized in that
   the tension strands (6) run perpendicular to the respective vertical abutting surface of the precast-concrete wall elements from which they project.
3. Prefabricated-part container according to Claim 1 or 2, characterized in that,
   on the horizontal planes, on which the at least two or four cladding tubes are arranged, a plurality of cladding tubes (5, 5') can each be provided for tension strands (6).
4. Prefabricated-part container according to any one of the Claims 1 to 3, characterized in that,
   in the area of the horizontal abutting points (8) between the precast-concrete wall elements, a tongue-and-groove- connection essentially extending across the entire length of the abutting points is provided.
5. Prefabricated-part container according to any one of the Claims 1 to 3, characterized in that at least two horizontally spaced bolts arranged within respective recesses of the opposite precast-concrete wall elements are provided in the area of each horizontal abutting points between the precast-concrete wall elements.
6. Prefabricated-part container according to any one of the Claims 1 to 5, characterized in that both the vertical and horizontal abutting points are pressed with injection mortar.
7. Prefabricated-part container according to any one of the Claims 1 to 6,
   characterized in that
   the tension strands (6) arranged in the cladding tubes (4, 5) are encased, and the cladding tubes (4, 5) are pressed with injection mortar.
8. Prefabricated-part container according to any one of the Claims 1 to 7, characterized in that the prefabricated-part container is round, polygonal or oval.
9. A method for manufacturing prefabricated-part containers according to any one of the Claims 1 to 8, characterized in that,

   after the creation and setting of a foundation plate (1) on this, a ring of vertical precast-concrete wall elements is arranged, wherein there is an alternation between precast-concrete wall elements at half height (2) and precast-concrete wall elements at full height (3),

   that tension strands (6) are drawn into the at least two vertically spaced cladding tubes (4) of the precast-concrete wall elements at half height (2) and the lower cladding tubes (5) of the precast-concrete wall elements at full height (3) communicating with these, and the ends of the tension strands (6) are clamped together so that the vertical precast-concrete wall elements are held by the clamping strands (6), thereby resting against one another,

   that, now precast-concrete wall elements at full height (3) are inserted into the gaps between the precast-concrete wall elements at full height (3) and secured by tension strands (6),

   that this process of inserting precast-concrete wall elements at full height (3) into the gaps that increasingly form is repeated until the desired height of the prefabricated-part container is reached, that, when the desired height of the prefabricated-part container is reached, precast-concrete wall elements at half height (2) are inserted into the existing gaps between the precast-concrete wall elements at full height (3) and these, in turn, are secured by tension strands (6),

   that, subsequently, both the vertical and horizontal joints and the cladding tubes (4, 5) are filled with injection mortar,

   and that, after setting the injection mortar, the tension strands (6) are clamped in such a way that the prefabricated-part container has the desired pretension, wherein the pretension exceeds the expected internal pressure when using the prefabricated-part container.

Images