DE2308928A1 - DEVICE FOR PROVIDING A FLOWABLE, POSSIBLE OR NON-HARDENABLE MASS LIKE (CONCRETE MORTAR), ASPHALT BITUMES AND THE LIKE, UNDER WATER - Google Patents

Description

Rotewa B. V. Katwijk aan Zee, The Netherlands

Device for providing a flowable, well or not hardenable mass such as (concrete) mortar, asphalt bitumen and the like under water

The invention relates to a device for providing a flowable, well or not hardenable mass such as (concrete) mortar, asphalt bitumen and the like under water, provided with a pouring pipe hanging from a supporting structure with a filling device.

Such devices, which are used, for example, for pouring concrete under water in the construction of hydraulic structures or for lining the floor of waterways with asphalt (concrete), are already known in various designs . Thus, it is to work under water pouring of concrete according to the known so-called Kontraktorprinzip remain after which the bulk tube permanently filled with concrete is to meet water to the Lindringen

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and with pouring opening permanently below the already The poured concrete mass is to be held in order to prevent segregation during the outflow. It is important that the outflowing mass, which under the influence of the pressure of the material column in the discharge pipe, on the outer wall of the discharge pipe is dammed along over a certain distance, is in can spread over a relatively large area. This means that working according to this principle is relatively easy Flowing masses (for example concrete masses with a fairly large "slump") can process and that in this way only layers or soils with a relatively large thickness can be obtained. For lining the floors of waterways with a This type of device is therefore not suitable for a relatively thin cladding layer or for the production of thin floors.

From the Dutch patent application 6808349 put for inspection, a device is known which for Processing of concrete masses with smaller settlements is suitable. The pouring pipe has flexible walls through which this pipe inclination has to be flattened under the influence of the surrounding water pressure or by the passage through the pipe to close falling mass. By means of one executed in this way, evenly over the to be poured Subsurface locomotives may have relatively thin layers of cladding placed over bottoms of waterways which cladding layers also have a uniform thickness due to the fact that the outflow end of the flexible pouring pipe follows the unevenness in the can add to clad floor. For pouring layers or soils whose surface does not follow the unevenness of the subsoil, but should be flatter, this could be flexible pouring tube at its lower end with a dimensionally stable tubular end piece or "shield" be surrounded. The advantage of using such a "composite" pour tube over the pouring pipe, which works according to the contractor principle, is practically any desired layer thickness, in particular Thicknesses which are far below those for the contractor procedure

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Applied Mlniaumdicke lie, can be realized.

A disadvantage of both the contractor chute and the composite chute is that due to variations in the height of the material column in the chute, variations in the Distance over which the mass flowing out along the outside of the pouring pipe or the end piece or the shield accumulated, can occur, causing unevenness in the surface of the poured layer or soil may occur.

The invention now aims to remedy the above concerns and achieves this aim in that the Chute pipe is surrounded at its outflow end with the interposition of a space by at least one short pipe section.

When using the device according to the invention, the Material which, under the influence of the pressure inside the chute, is dammed up along the lower part of this chute, in the first place in the annular space between added the chute and the pipe section. The zone around the pipe section is "fed" from this annular space, whereby the material is backed up again and now along the outside of the pipe. It arises from the Outside of the pipe section a level that is lower than the level inside the pipe section. Starting from a ' certain position of the outflow end of the chute, for example at a short distance above the surface to be poured When using the above-mentioned contractor principle, the pipe section provided according to the invention around the outflow end of the pouring pipe will therefore lead to the thickness of the The cladding layer or the floor with the difference in level between the inside and outside of the pipe section is reduced will. This difference in level depends, of course, on the viscosity of the mass being processed. Where in the contractor procedure, As noted above, it is usually possible to work with larger masses and therefore with more easily flowing masses It is therefore advisable to use this method to provide one or more further pipe sections around the pipe section. the Pipe pieces then cause a kind of labyrinth effect thanks to

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which one can control the pouring process as desired and, in particular, can also be adjusted to smaller layer thicknesses. The variation in the definitive bulk level, i.e. the level around the outer pipe section, with a varying height the material column within the actual chute, will be further the smaller after more pipe pieces are used,

When the material column within the chute has a relatively low height, for example as a result of the application a chute with flexible walls, a single piece of pipe could be around the end piece or the shield of such The chute around it is enough. With the smaller slurries usually used in such cases, the material usually have little or no tendency to build up along the outside of the pipe section. this means that the lower edge of the pouring pipe or the pipe section in this case is the definitive surface of the poured layer or of the poured soil. Variations in the material level in the space between the discharge pipe end piece and the pipe section as a result of height variations in the material column inside the pouring pipe will then have no consequences for the pouring level outside the pipe section. One could then Simply place the pouring pipe with the lower edge of the surrounding pipe section down to the desired level of the soil to be poured or lower the lining layer to be poured and continue the pouring pipe while feeding in the mass to be processed Adjust in the horizontal direction over the area to be coated. That in the space between the actual chute (resp. the end piece of the same) and the surrounding piece of pipe existing "excess" material is with the adjusting Taken the chute and it has been shown that this material forms little or no resistance because this Material is still in full motion.

The device according to the invention also has the The advantage of this is that those parts of the surface to be coated which, for example, are in one of sheet piles limited excavation an undercut position opposite to the

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Take up the upper side of this construction pit provided belts or such obstructions, are easily pourable.

The invention is explained in more detail below with reference to the drawing with an exemplary embodiment.

Fig. 1 shows a schematic vertical section through a rubble pipe with two around the lower end of the same provided pipe pieces according to the invention}

FIG. 2 shows a vertical section through an excavation pit with the device according to the invention and arranged therein

Fig. 3 shows a section along the line III-III in Fig. 2.

In Fig. 1, the lower part of a pouring pipe is shown with 1, by means of which a cladding layer or a floor 3, for example made of concrete, is to be produced on a sub-surface 2 lying under water. During the pouring of the layer or the soil 3, the pouring pipe 1 is kept filled with concrete. The height of the material ^{column in the J} 'pouring tube is indicated in old R. The concrete mass flowing out at the lower end of the pouring pipe 1 is dammed up along the outside of the pouring pipe according to the arrows P>, namely up to the height

The pouring pipe 1 is at the outflow end of a pipe section 4, through which the concrete mass accumulating from the pouring pipe 1 according to the arrows P is caught in the annular space 5 between the pouring pipe 1 and the pipe section 4. Normally, that is to say without the pipe section 4 being provided, as is the case with the normal contractor pipe, the whole would Environment around the pouring pipe 1 to be poured up to the height H. This last-mentioned height would then at the same time be the minimum thickness of the relevant cladding layer or of the relevant one Ground, which in the normal way, starting from a column of material with a height H and a minimum distance A. «Between the lower edge of the pouring pipe 1 and the underground 2 to be filled could be realized.

In the annular space enclosed by the pipe section 4, there is a build-up around the lower end of the pipe section instead, namely according to the arrows P. and up to a height

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B ₀ which is significantly smaller than the height H ₁ . The height H would also determine the level of the poured layer or the poured soil if no further pipe sections were provided. In the example of FIG. 1, however, a second pipe section 4 * is used at a radial distance around the pipe section 4, as a result of which the (minimum) floor thickness is reduced even further, to a value corresponding to the bed height H ₃ .

In the embodiment according to FIGS. 2 and 3, the device according to the invention is provided with a pouring pipe of a special type, consisting of a pipe la with flexible walls, which pipe is surrounded at the bottom by a dimensionally stable tubular end piece Ib. The flexible pouring pipe la is fastened at its upper end by means of a clamp 6 around the outflow end of the filling funnel 7 and extends loosely with its lower end into the end piece Ib. The end piece 1b is suspended from the hopper 7 by means of connecting rods 8. Instead of connecting rods, flexible connecting elements such as chains could also be used. In the exemplary embodiment under consideration, the hopper 7 with the pouring pipe 1 a, 1 b attached to it is movably supported on impellers 9 by a support frame, which support frame consists of the longitudinal beams 11 serving as guide rails for the impellers 9 and the transverse beams 12.

The support frame 10 can for its part be moved in the transverse direction over a pair of rails 14 by means of four running wheels 13 mounted in the crossbeam 12. In the exemplary embodiment shown, the rails 14 are formed by pipes which are fastened, for example, by welding to the upper edge of the sheet piles 15, which sheet piles delimit an excavation pit, and a layer 3 of concrete, for example, is to be poured onto the submerged floor 2 of the same which layer could serve as a floor, support layer between the sheet piles 15 or as a work floor or support floor, for example for a pillar.

Fig. 2 shows the inventive device with the pouring pipe la, Ib hanging down in the excavation pit in one Position in which the funnel 7 with the pouring pipe la, Ib hanging on it during pouring in the direction of the arrow on

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Support frame 10 is offset along.

In accordance with what has been discussed above with reference to FIG. 1, the concrete mass occurring at the lower end of the pipe stucco Ib is under the influence of the pressure of the material column h on the Be dammed up along the outside of the pipe section Ib. As a result, however, that the column height h as a result of the use of a rubble pipe la with flexible walls (which causes these walls to fall under Under the influence of the pressure of the surrounding water constantly trying to contract) only needs to be relatively small »the The distance over which the material is dammed up along the outside of the pipe section Ib 'can be relatively small. This Distance h could nevertheless vary with a varying height h of the material column within the end piece Ib in such a way that a irregular surface of the layer 3 would arise. To avoid this, a piece of pipe is around the end piece 1b 4a is provided, the effect of which is comparable to that of the pipe section 4 around the pouring pipe 1 in FIG. In connection with the relatively small column height h, the height could be of the pipe section 4a can be selected to be much smaller than that of the pipe section 4 in FIG. The varying height h. of the material in annular space Sa between the end piece Ib and the pipe section 4a itself is so small that there is little or no tendency for the material to accumulate on the outside of the pipe section 4a along consists. This means that in the exemplary embodiment according to FIGS. 2 and 3, the use of a single pipe section 4a is sufficient to obtain a layer or floor 3 with a flat surface. This surface is then through the plane through the determined lower edge of the pipe section 4a.

Has the assembled pouring pipe la, Ib in Fig. 2 their End of the operation from left to right, the support frame 10 is in a direction perpendicular to the plane of the drawing "Wrong" »after which the pouring pipe la, Ib could start a next operation from right to left.

To adjust the pouring pipe la, Ib or the support frame 10, conventional means can be used, such as Winch devices which do not need to be explained in more detail and are also not shown in more detail in the drawing.

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The pipe sections 4 or 4 'or 4a are, for example, by spokes or not shown in detail in the drawing such fastening members connected to the rubble pipe 1 or the end piece Ib. The lower edge of the pipe section or the Pipe pieces need not lie in the same plane with the lower edge of the end piece 1b or the pouring pipe 1, but could also be located at some distance above or below this edge.

In particular when the invention is used in a chute, working according to the contractor principle, according to which one Usually the pouring pipe sinks relatively close to the ground to be filled, it is advantageous to use the pipe section or the Pipe sections adjustable lengthways around the lower part of the chute to mount around. You then have the option of placing the pipe section or the outer pipe section at such a height set that there is no accumulation of material on the outside of the pipe section or along the outer pipe section along there is more and the lower edge of that piece of pipe thus determines the definitive bulk level. With reference to Fig. this would mean that the outer piece of pipe 4 'is arranged so far opposite the pouring pipe 1 upwards that the lower The edge of this piece of pipe comes to rest on the level indicated by H. For this purpose, the pipe section in question could be guided along the actual pouring pipe 1 in the vertical direction and are more or less "celebrated" by means of chains or the like

The suggestion "flowable mass" does not only include viscous masses. The inventive device could for For example, other types of flowable material such as sand or gravel can also be used under haters, when it comes to obtaining a level base for the arrangement of caissons or tunnel sections, for example.

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Claims (2)

A W SPARDS {1. / Device for providing a flowable , well or not hardenable mass under water, such as (concrete) mortar, asphalt bitumen and the like, provided with a pouring pipe hanging down from a supporting structure with a filling device, characterized in that the pouring pipe on your Outflow end is surrounded by at least one short piece of pipe with the interposition of a space. 2. Device according to claim 1, characterized in that the pipe section or the outer pipe section is mounted so that it can be adjusted in the lengthwise direction around the lower part of the pouring pipe. 309837/0379