DE60025521T2 - METHOD FOR FORMING A CONTAINER - Google Patents

Abstract

Method for casting together a plurality of prestressed concrete elements (103) to a tank (100) with joints (1-19) between each respective concrete element (103) and pre-stress cables (43) guided through the concrete elements (103), where a first joint (1) starts to be filled and then, with a time delay, the subsequent respective joints (2, 3), etc., until all the joints (1-19) are filled. The joints are formed in such a way that joint concrete rises in a transcend hole positioned beside an embedded tube going through the concrete elements. Further, a tank comprising concrete elements prestressed both horizontally and vertically.

Description

Territory of invention

The The present invention relates generally to concrete elements be merged, and in particular that biased Concrete elements are poured together to a tank.

background the invention

nowadays There is a need for a tank that is easy to assemble is. It is lighter and less labor intensive, bias wire ropes in Interior of concrete elements as external through holes to lead in ribs, using mechanical devices, so-called push-through machines become. Furthermore There is less risk that the Vorspannungsdrahtseile rupture or be cut through due to sabotage when the prestressing wire ropes within the concrete elements and not on the outside of the concrete elements.

Prestressed concrete elements for tanks are in the EP 0 514 583 (Parenti) and in BFT No. 4/89 "Concrete Precasting Plant and Technology", pages 90-93 by Josef Imkamp described. A circular tank, which has precast concrete parts, goes out of the DE 3335141 out.

Preloaded Concrete elements are usually made as whole parts. If these latter are shed to a tank together, the for example, a liquid Without leakage should be on the one hand prestressed wire ropes used to hold the concrete elements together, and on the other hand the joints are poured together between the concrete elements. The prestressing wire ropes, which pass through the concrete elements are defined by embedded tubes, e.g. Plastic pipes, guided. The prestressing wire ropes need protected against corrosion which, among other things, requires that they have no contact with should have air. To the prestressing wire ropes against corrosion to protect, They are provided with a grease-containing plastic wrap.

The Fugue between two concrete elements must be designed so that she solves several problems. Because the tank is made of straight concrete elements, there is while guiding the prestressing wire ropes around the tank are in danger of being damaged to hang in the joints stay if they are not led straight to the next tube inlet. The joints between the concrete elements are in the assembly itself not sure what she favorably would, because the to be poured in the joints Joint concrete very liquid is. If the regular pouring of Fugitive problems occur, it is sometimes necessary to separate each joint individually to shed again. From to pour up and at the same time eliminating the air that could weaken the cast is complicated.

Summary the invention

task It is the object of the present invention to provide a durable tank manufacture.

A Another object of the present invention is to provide a Tank in which the protection against corrosion and mechanical damage the prestressing wire ropes is improved.

Yet Another object of the present invention is to provide concrete elements to produce with vertical sections that have a mechanical Allow pouring from bottom to top by means of a pump.

Yet Another object of the present invention is to provide a To produce tank with improved structural strength.

According to the present Invention is a tank with the features of claim 4 and a concrete element for one Tank according to the characteristics of Claim 1 provided.

Around Furthermore, to protect the Vorspannungsdrahtseile against corrosion leading the bias wire ropes embedded pipes during casting the joints are also filled with joint concrete.

Around To prevent air bubbles from forming when the joint concrete filled is a method is used in which with the filling of a first fugue is started and after a time delay with the filling the next Joints on both sides of the first joint is started. After a further time delay will be filled with the following joints started and so on, until with the filling of all joints was started. By casting the joints becomes a coherent Tank received.

The to lead used the Vorspannungsdrahtseile around the tank inside the concrete elements Plastic pipes have a funnel-shaped design at one end, so that they better absorb the prestressing wire rope at that end can, when it comes around the tank.

Preferably Sealing devices are inserted into the outer parts of the joint to the Prevent joint concrete from leaking when pouring.

Of the Cavity or the through hole, the side of the horizontal Pipes and is arranged by the track of the Vorspannungsdrahtseile serves partly for introducing the joint concrete when pouring the tank and partly as a security channel for a manual filling with joint concrete, if in the ordinary fill the joint concrete is a problem.

Further Features and advantages of the present invention will become apparent from the following description.

Short description the drawings

The The present invention will become more apparent from the following detailed description of embodiments With reference to the accompanying figures clear, the only for illustrative purposes and not for limitation of the present invention. It shows:

1 a tank with a pump for filling the joint concrete;

2 a portion of a piping system for filling joint concrete in a tank according to a preferred embodiment;

3 a float to indicate that a joint is full;

4 a section through a joint between two concrete elements; and

5 a system for filling joint concrete in a tank according to another embodiment.

detailed Description of embodiments

In The following description is for explanatory purposes and not as restriction specific details, such as specific procedures and Applications called to a thorough understanding of the to lead present invention. However, one skilled in the art will recognize that the present invention in other embodiments in the practice can be implemented by these specific details differs. In other cases is based on a detailed description of known methods and Devices dispensed with the description of the present invention not with unnecessary details to charge.

It The description of the invention follows by way of illustrative examples based on the drawings.

It follows a more detailed description of a preferred embodiment.

A tank 100 , the nineteen concrete elements 103 is in 1 shown. There is also a pump 101 and a piping system 102 to every fugue 1 - 19 is connected, shown. Every concrete element 103 has several embedded tubes 42 , Plastic pipes, which for guiding bias wire ropes 43 , eg steel wire ropes, around the tank 100 are thought around. The prestressing wire ropes 43 are used to concrete elements 103 hold together when the joints 1 - 19 be poured together. So that a uniform filling with joint concrete in all joints 1 - 19 and all embedded pipes 42 in a tank 100 can be achieved without air pockets, a method is used, in which the filling with joint concrete first in the joint 1 is started. After a time delay is filled with the joints 2 and 3 started, and then after a further time delay with the filling of the joints 4 and 5 , and so on, until with the filling of all joints 1 - 19 started with joint concrete. The joint concrete is filled under pressure beginning with the lower end.

A pump 101 and piping 102 to distribute the joint concrete under pressure will be in the tank 100 used. A system of pipelines, where 2 shows a part of the piping system, to distribute the joint concrete on the various joints 1 - 19 is assembled so that a first pipe from the pump 101 to a three-way junction 20 near the concrete elements 103 leads. The two following pipelines in the three-way junction 20 continue around the inside of the concrete elements 103 around. Every fugue has a three-way branch 20 arranged further along the inside of the concrete elements and into a nozzle in the joint. There is a valve at each joint 21 For example, a ball valve or a spool valve arranged as a shut-off valve 21 for each corresponding joint. There are also valves 22 shown, such as ball valves, in the piping system 102 between the corresponding joints 1 - 19 are arranged and at the time delay of the start of delivery of joint concrete of different joints 1 - 19 be used.

When the in 1 shown pump 101 is started and the mixing of the joint concrete begins, is the pump 101 from the piping system 102 disconnected, are all valves 22 between the corresponding joints 1 - 19 closed and are all check valves 21 open. When the joint concrete in the pump 101 has reached an acceptable quality, the pump will 101 with the piping system 102 connected and is the joint concrete in the pipeline system 102 forced out. First, the joint concrete comes in a three-way junction 20 on and, as the valves 21 . 22 are adjusted accordingly becomes the first joint 1 directed. The joint concrete is introduced into the respective joint via an embedded bent pipe. The bent pipe is at the bottom of the concrete elements 103 embedded. The joint concrete fills the joint 1 and the pipes 42 used to guide the prestressing wire ropes 43 be used to the adjacent concrete elements, and if the joint concrete the top of the joint 1 reached, so in 3 shown float 34 on, indicating that the first fugue 1 is filled. The swimmer 34 is disposed in an upper seal and is further used to prevent leakage of joint concrete.

A bottom seal of the joints is obtained when around the lower end the concrete elements a casting is performed, otherwise one must temporary Seal be created by a sealing device is introduced which is held with wedges at the bottom of the joint.

To allow air to escape through the system, holes are provided in each joint around the floats. When the swimmer 34 Rises through that joint concrete the joint 1 achieved, then seals a sealing ring 33 on the float 34 the upper part of the fugue 1 prevents and prevents joint concrete from leaking. When the swimmer 34 ascends and the upper part of the fugue 1 seals, then this is an indication that the fugue 1 is filled. The top part 35 of the swimmer 34 For example, it could be colored to make it clear when it moves up.

The air in the system should also be allowed to escape from any embedded pipe. For this to be possible, any embedded pipe is with a vent pipe 105 provided at the holes where the Vorspannungsdrahtseile be introduced into the concrete elements. The vent pipes 105 flow into the interior of the tank 100 , Each vent pipe 105 is provided with a closing valve, eg a ball valve. When the joint concrete through a vent pipe 105 escapes, this indicates that the tube is filled and the corresponding closure valve is closed.

One alternative method to let the air out of each embedded pipe is using small holes instead of vent pipes. From a small hole with a diameter of about 3 mm Air and water escapes from the embedded pipes while the concrete is escaping stays inside.

After a delay of a few minutes, after filling the first joint 1 started, the two valves 22 Open the joint concrete further into the joints 2 and 3 involved. After a further time delay of a few minutes, the joint concrete will continue in the joints 4 and 5 opening valves open and so on. This continues until the joint concrete has begun to fill all the joints 1 - 19 to fill. If then the floats 34 in the upper part of the respective joints rise and indicate that the respective corresponding gap is filled, the respective check valve 21 closed. Closing the check valves 21 takes place with a certain time delay. If it was indicated that the joints 2 and 3 as well as the fugue 1 are filled, then the check valve 21 at the fugue 1 closed. This prevents the joint concrete from sagging backwards. Now when the next swimmer indicates that his joint is full, then the check valve 21 , which belongs to the adjacent fugue whose swimmer has previously indicated a filled gap, closed. Finally, when all swimmers indicate that their respective joints are full, eventually all the valves will become 21 . 22 closed.

Should when completely pouring the tank 100 If there is a problem, the joints can also be filled in hindsight. By lowering a tube into the through hole 41 and filling of joint concrete from above from the point where the incomplete casting ended, and by raising the filler pipe with the rising joint concrete air inclusions can be avoided.

hereafter the pipeline system is dismantled and cleaned, which means that it is reusable.

4 shows a section through a joint between two concrete elements 103 , The joint is designed so that prestressing wire ropes 43 safely over the joint can be carried away when the Vorspannungsdrahtseil 43 around the tank 100 is led around. The pipe 42 which is the bias wire rope 43 in the direction of the insert out of the joint and into the subsequent concrete element of the prestressing wire rope 43 leads, has a funnel, which is the bias wire rope 43 fields. The pipe 42 , which introduces the Vorspannungsdrahtseil in the joint, should with the pipe 42 Aligning the Vorspannungsdrahtseil out of the joint, be aligned. If in the production of a concrete element at the end of a pipe is slightly wrong, then the funnel mentioned above is special This is important because during assembly a biasing wire rope is not then fed straight into the inlet of the next tube.

In order to prevent joint concrete from leaking when filling the joint concrete, sealing devices are provided in the outer parts of the joint 40 arranged, for example, precompressed compression bands or a sealing connection, and are attached to the upper and at the lower end of the joint sealing plates. This additional sealing device 40 is preferred because the joint concrete is introduced under pressure. Besides, besides the paths of the prestressing wire ropes 43 also a cavity (through hole) 41 designed so that the joint concrete rise in the joint gap and also the pipes 42 can fill with joint concrete (each concrete element has several pipes 42 , which are distributed on different levels depending on the height of the concrete element). The arrangement of the through hole 41 next to the path of the prestressing wire rope is important if there is a problem during casting. So that the pouring of the tank 100 can progress easily, even if a part of the joint concrete already in the tank 100 could be filled through the through hole 41 a pipe can be lowered and joint concrete poured from the top of the joint, but the joint concrete is still filled from below (which continues where the casting has been interrupted). When the through hole 41 placed on the Vorspannungsdrahtseil, one could not lower a pipe through the through hole.

The distance between the concrete elements at the through hole 41 is greater than the distance in the Vorspannungsdrahtseil 43 to minimize the amount of joint concrete needed to pour the tank. The through hole 41 preferably has a diameter of about 40 mm to receive joint cement from below or to receive the refilling tube from above. The distance between the concrete elements on the prestressing wire ropes is preferably 10-15 mm, which, in addition to minimizing the amount of joint concrete, also facilitates guiding the prestressing wire ropes through a joint. In addition, the joint plug-in receptacles to allow easy insertion of sealing devices 40 and protruding and corresponding recessed parts which engage with each other to hold the concrete elements in position during assembly. The protruding and recessed parts are convex and concave, respectively, and they reduce the stress imposed on the concrete elements by the bias.

The swimmer 34 which is used to prevent the joint concrete from escaping from the top of the joint, and is used to indicate a filled-in joint, is disclosed in U.S. Pat 3 shown closer. The float includes a plastic tube with a seal 31 on the lower side, which prevents the joint concrete from escaping from the pipe, and instead causes the pipe to rise as the joint concrete rises in the joint. Around the pipe, the air is allowed to escape. It is pushed out by the poured joint concrete. In addition, the tube also has a sealing ring 33 on, which seals the air leaking gap, so that the joint concrete does not escape when it reaches the top of the joint. The sealing ring 33 is through a container 32 kept in place. When the swimmer 34 goes up, also becomes a flag 35 that is, the end of the tube raised, which may be colored, for example, indicating that the gap is filled.

Another embodiment will now be described in detail with reference to FIG 5 described.

In this embodiment, the joint concrete is merely through an inlet pipe 23 introduced into the concrete elements. This pipe passes the joint concrete preferably through joint 1 that the concrete element with the ventilation pipes 105 opposite. In this embodiment, an additional thick embedded pipe is used in the lowermost part of the concrete elements to allow the joint concrete to spread well over all the concrete elements. After the bottom pipe has been filled, the joint concrete rises in the joints 1 - 19 in the same way as described above, without needing to open valves. This embodiment uses no other supply valves except for the single inlet tube. In the same way as described above, vent valves are closed when the joints are filled.

Using this method, the only piping system necessary to distribute the joint concrete to the joints is that within the concrete elements, and the pump can be in substantial proximity to the joint 1 to be ordered. Since only one inlet tube is necessary, this tube can be located outside the tank and it is not necessary to lift a pump into the tank but it can be connected from outside the tank. As a precaution, for example, at the joints 12 and 13 additional inlet pipes 24 to be ordered. If the pump is located outside the tank, the vent pipes may also be directed out of the tank. Since the entire system is to be filled from one point, a higher pressure is needed, which places greater demands on the sealing devices. To the backwards To reduce acting pressure in the system, it is possible in the joints 1 - 19 to use check valves between different levels, eg where the tubes carrying the prestressing wire ropes are distributed.

One check valve For example, it can simply be a horizontal lid attached to a End is hinged and from the horizontal plane at his other end is movable upwards, and also a stop device that prevents the moving part from moving horizontally Level to move down. The pressure exerted by the pump raises the lid up and when the pressure from above is greater should, falls the lid back and prevents the joint concrete from flowing back into the system.

at another embodiment, not shown, is the piping system designed to be of a single person inside the tank could be served. After the pump, a three-way junction is arranged, and on each further branch is another three-way branch arranged. Each further branch has valves, e.g. Ball Valves, to control the flow of joint concrete to each joint be used. The filling Fugenbeton done as well as for the above-mentioned embodiment was described, but with the difference that stopping the river can now be done with the same valve that controls the flow of joint concrete allowed. The check valves are closed after the entire casting process is completed and all joints are filled with joint concrete.

systems the above mentioned Kind of can Naturally also be easily automated. Instead of having a flag mechanical is raised, if a gap is filled, a sensor could also signal, e.g. output an electrical pulse to a control unit, which then further controls the valves to turn on after a suitable time delay further filling to stop from joint concrete. The same control unit could then also control the pump and valves for opening and closing.

at a preferred embodiment The concrete elements of the tank are both vertical and horizontal biased. Vertically prestressed concrete elements are formed by molding Prestressed wire ropes in the concrete elements during manufacture. Horizontal prestressed concrete elements are as described above produced. By preloading the concrete elements both in the horizontal as well as in the vertical direction becomes a significant improved structural strength achieved. Elements for higher tanks, i.e. longer in their casting Elements are more robust in their handling. Such vertically biased Elements are opposite gradient forces, such as temperature differences or horizontal preload, less sensitive. Furthermore are the vertical prestressing wire ropes in the concrete elements embedded while the horizontal prestressing wire ropes on one of the concrete elements are anchored.

It It is obvious that the present invention has many uses can be varied. Such variations should not be considered one Deviation from the scope of the present invention. All such variations, for a person skilled in this Area are to be understood, within the scope of defined in the claims present invention.

Claims (4)

Concrete element ( 103 ) for a tank ( 100 ), where the element embedded horizontal tubes ( 42 ) for receiving bias cables ( 43 are arranged, wherein the element is formed so that in an arrangement of two elements side by side, a joint gap for the casting together of the two elements is defined between them, characterized in that the joint gap a cavity ( 41 ) next to the horizontal pipes ( 42 ) to allow a joint concrete to rise and introduce a filler pipe down, wherein in the joint gap, the distance between the two concrete elements on the cavity larger than on the horizontal tubes ( 42 ). Concrete element according to claim 1, wherein sealing devices ( 40 ), preferably precompressed compression bands, are disposed on the outer parts of the joint space. Concrete element according to claim 1 or claim 2, wherein one side of the element has a depression and an opposite one Side has a protruding part, wherein the sides are formed are that when arranging two elements side by side the above Part of one of the elements with the depression of the other element engages. Tank ( 100 ) with several concrete elements ( 103 ) which are cast together, wherein the concrete elements are biased vertically and horizontally embedded tubes ( 42 ), the horizontal bias cables ( 43 ), wherein the embedded pipes and the joints between the adjacent concrete elements are filled with joint concrete, wherein the tank is characterized in that the concrete elements so out are formed, that each of the joints has a filled with concrete joint gap, in addition to the bias cable ( 43 ) containing a horizontal cavity ( 41 ), in which the joint concrete was filled, and in each filled with concrete joint gap, the distance between two juxtaposed concrete elements on the cavity is greater than on the horizontal tubes.