EP3485097B1 - Vibrofloatation device - Google Patents

Description

The invention relates to a vibrator arrangement for producing stuffing columns.

Stuffing pillars are material pillars that are placed in the ground and used in construction to improve the soil properties for subsequent development. For the production of stuffing columns, vibrator arrangements can be used that partially penetrate the ground with the help of vibrations and create a borehole in the ground. Then material, such as dry concrete, recycled concrete, rubble, sand, gravel or a mixture thereof, is fed into the borehole via the vibrator arrangement and the material is then compacted. By repeating this process several times, the stuffing column made of material is filled piece by piece up to the surface of the ground. The time required for the production of stuffing columns is largely determined by the time needed to load the vibrator arrangement and to fill the stuffing columns.

US 2012/039671 A1 relates to a device for generating a column of compacted material in the ground by means of a vibrating probe. The material to be compacted is fed in via a feed pipe, at the lower end of which the vibrating probe is attached. At its end facing the vibrating probe, the feed pipe is designed as a divider pipe which has two outlets.

DE 102011 005267 A1 discloses a vibrator arrangement having two silo tubes extending in a longitudinal direction. The filling of the silo tubes with a material to be compacted takes place laterally through external closures which are arranged on a jacket of the silo tube in question.

EP 0 543 320 A1 shows an apparatus for producing piles from concrete. The device has a material feed pipe and two, three or four vibrating pipes.

NL 7 212 948 A also shows an apparatus for making piles. The device has two spaced apart delivery pipes and a filling pipe running between them, which are rammed together into the ground. Soil gets into the two delivery pipes. When the delivery pipes and the filling pipe are subsequently pulled, a concrete mix is introduced into the ground via the filling pipe.

EP 2 241 677 A2 relates to a device for soil compaction with a pipeline for supplying inert materials. as well as a drill set.

WO 2015/185121 A1 describes a depth vibrator tube arrangement with a telescopic tube which has tubular bodies which can be displaced relative to one another. The arrangement also includes a conduit.

Known vibrator arrangements have the disadvantage that only a limited amount of material can be conducted into the borehole per unit of time.

The object on which the invention is based can therefore be seen in creating an improved vibrator arrangement which allows more material to be directed into the borehole per unit of time.

The stated object is achieved by a vibrator arrangement according to claim 1. Different examples and further developments of the invention are the subject of the dependent claims.

An exemplary vibrator arrangement has a silo tube with a longitudinal axis and a first end and a second end. In addition, the vibrator arrangement has a vibrator unit which is mechanically coupled to the silo tube, and a filling arrangement which opens into the silo tube at the first end. The filling arrangement is designed to receive material and to guide it into the silo tube, the silo tube having at least two separate channels from the first end to the second end and parallel to the longitudinal axis.

• Figur 1 zeigt eine Schnittdarstellung einer beispielhaften Rüttleranordnung;
• Figur 2 zeigt eine perspektivische Ansicht einer beispielhaften Rüttleranordnung mit vier Kanälen;
• Figur 3 zeigt eine perspektivische Ansicht der beispielhaften Rüttleranordnung in Figur 2;
• Figur 4 zeigt eine Schnittansicht der beispielhaften Rüttleranordnung in den Figuren 2 und 3;
• Figur 5 zeigt eine Schnittansicht einer beispielhaften Rüttleranordnung mit einem Kanal;
• Figur 6 zeigt eine Schnittansicht einer beispielhaften Rüttleranordnung mit zwei Kanälen;
• Figur 7 zeigt eine perspektivische Ansicht einer beispielhaften Rüttleranordnung;
• Figur 8 zeigt eine perspektivische Detailansicht eines oberen Teils einer beispielhaften Rüttleranordnung;
• Figur 9 zeigt eine Schnittdarstellung einer beispielhaften Rüttleranordnung;
• Figur 10 zeigt eine weitere Schnittdarstellung der beispielhaften Rüttleranordnung in Figur 9;
• Figur 11 zeigt eine perspektivische Ansicht einer beispielhaften Versorgungseinheit;
• Figur 12 zeigt eine Draufsicht auf eine beispielhafte Rüttleranordnung mit einer Versorgungseinheit;
• Figur 13 zeigt einen oberen Teil einer weiteren beispielhaften Rüttleranordnung;
• Figur 14 zeigt eine perspektivische Ansicht eines beispielhaften Schütttrichters;
• Figur 15 zeigt eine weitere perspektivische Ansicht des beispielhaften Schütttrichters in Figur 14;
• Figur 16 zeigt eine Schnittansicht einer beispielhaften Rüttleranordnung mit einem Schütttrichter;
• Figur 17 zeigt eine Detailansicht eines Ventils des Schütttrichters in Figur 16;
• Figur 18 zeigt eine Detailansicht eines weiteren beispielhaften Ventils des Schütttrichters in Figur 16;
• Figur 19 zeigt einen Schütttrichter mit Federbeinen an einer Rüttleranordnung;
• Figur 20 zeigt eine Detailansicht des Schütttrichters in Figur 19 mit einer Führungsvorrichtung;
• Figur 21 zeigt beispielhafte Verfahren zum Befüllen der Rüttleranordnung mit Material.

The invention is explained in more detail below with reference to the examples shown in the figures. The illustrations are not necessarily true to scale. Rather, emphasis is placed on illustrating the principles on which the invention is based.

• Figure 1 Figure 12 shows a cross-sectional view of an exemplary vibrator assembly;
• Figure 2 Figure 12 is a perspective view of an exemplary four channel jogger assembly;
• Figure 3 FIG. 13 shows a perspective view of the exemplary vibrator arrangement in FIG Figure 2 ;
• Figure 4 FIG. 13 shows a sectional view of the exemplary vibrator arrangement in FIG Figures 2 and 3 ;
• Figure 5 Figure 12 shows a sectional view of an exemplary vibrator assembly having a channel;
• Figure 6 Figure 12 shows a sectional view of an exemplary two-channel vibrator assembly;
• Figure 7 Figure 12 is a perspective view of an exemplary vibrator assembly;
• Figure 8 Figure 12 shows a detailed perspective view of an upper portion of an exemplary vibrator assembly;
• Figure 9 Figure 12 shows a cross-sectional view of an exemplary vibrator assembly;
• Figure 10 FIG. 8 shows a further sectional illustration of the exemplary vibrator arrangement in FIG Figure 9 ;
• Figure 11 shows a perspective view of an exemplary supply unit;
• Figure 12 shows a plan view of an exemplary vibrator arrangement with a supply unit;
• Figure 13 Figure 13 shows an upper portion of another exemplary vibrator assembly;
• Figure 14 Figure 12 shows a perspective view of an exemplary hopper;
• Figure 15 FIG. 13 shows a further perspective view of the exemplary hopper in FIG Figure 14 ;
• Figure 16 shows a sectional view of an exemplary vibrator arrangement with a pouring hopper;
• Figure 17 FIG. 13 shows a detailed view of a valve of the hopper in FIG Figure 16 ;
• Figure 18 FIG. 13 shows a detailed view of a further exemplary valve of the hopper in FIG Figure 16 ;
• Figure 19 shows a hopper with spring legs on a vibrator assembly;
• Figure 20 shows a detailed view of the hopper in Figure 19 with a guide device;
• Figure 21 shows exemplary methods for filling the vibrator assembly with material.

In the figures, the same reference symbols designate the same or similar components with the same or similar meaning or function.

Figure 1 shows two sectional views of an exemplary vibrator arrangement. The vibrator arrangement can have a silo tube 110 with a longitudinal axis 101 and a first end 111 and a second end 112. The silo pipe 110 and a filling arrangement 150 can be rotationally symmetrical to the longitudinal axis 101. The silo tube 110 is that part of the vibrator arrangement which is designed to be used during operation of the vibrator arrangement to penetrate at least partially into the ground. At the first end 111 of the silo tube 110, the filling arrangement 150 can be arranged, which opens into the first end 111 of the silo tube 110 and which can be designed to receive material and to guide it into the silo tube 110. The filling arrangement 150 and the silo tube 110 can each have different cross-sectional shapes and cross-sectional sizes in a cross-sectional plane. The cross-sectional planes can run perpendicular to the longitudinal axis 101 of the silo tube 110. The material can be, for example, rubble, sand, gravel or a mixture thereof.

The silo tube 110 can be divided into at least two channels 121 and 122 from the first end 111 to the second end 112 and parallel to and / or along the longitudinal axis 101 of the silo tube 110. In Figure 1 two such channels are shown. The channels 121 and 122 can be separated from one another by a web 131, for example. The channels 121 and 122 can also be separated from one another in a gas-tight manner and can have at least approximately the same surface area in a cross-sectional plane which is arranged perpendicular to the longitudinal axis 101 of the silo tube 110.

The filling arrangement 150, which opens into the first end 111 of the silo tube 110, can have one or more chambers. In the example shown, the filling arrangement 150 has two chambers 151 and 152. The number of chambers can be selected depending on the number of channels in the silo tube 110. In the example shown, the chambers 151 and 152 are separated from one another in a gastight manner. A respective chamber 151 or 152 of the filling arrangement 150 can be connected to a respective channel 121 or 122 of the silo tube 110. Material can be fed into the channels 121 and 122 of the silo tube 110 via the chambers 151 and 152 of the filling arrangement 150. The chambers 151 and 152 can be designed to receive a predefined amount of material and to deliver it into the channels 121 and 122 of the silo tube 110. The chambers 151 and 152 can have one or more funnels 153 which facilitate the filling of the chambers 151 and 152.

In the example of Figure 1 can each of the chambers 151 and 152 of the filler assembly 150 both through a respective first valve 154 and 155 and through a respective one second valve 156 and 157 are opened or closed. The first valves 154 and 155 each form a gas-tight lock with the second valves 156 and 157. You can close the silo tube 110 and the chambers 151 and 152 gas-tight from the external environment. By alternately opening and closing the first valves 154 and 155 and the second valves 156 and 157, as is already known from pressure locks, it is possible to fill the filling arrangement 150 with material and at the same time to prevent gas from uncontrolled out of the silo tube 110 or flows into the silo tube 110. The gas can be compressed air or a gas mixture under pressure, for example.

The vibrator arrangement can have a vibrator unit 140 which can be arranged at the second end 112 and optionally also partially inside the silo tube 110 and / or can be mechanically coupled to it. The vibrator unit 140 can generate mechanical vibrations which mainly propagate in the transverse direction of the silo tube 110. During operation, the vibrator unit 140 can penetrate the ground with the vibrator unit 140 in advance. The channels 121 and 122 of the silo tube 110 can be arranged axially to the longitudinal axis 101 around the vibrator unit 140. In the left figure the Figure 1 the valves 154 and 155 are open and material can flow from the hopper 153 into the chambers 151 and 152. The valves 156 and 157 are closed. In the right figure the Figure 1 the valves 156 and 157 are open and material can flow from the chambers 151 and 152 into the silo tube 110, in particular into the channels 121 and 122. The valves 154 and 155 are closed. The channels 121 and 122 can be designed in such a way that they adapt to or cling to an outer contour of the vibrator unit 140 in a space-saving manner as possible.

Figure 2 and 3 show perspective views of the silo pipe 110 in a further example. The silo tube 110 can have one or more channels 121, 122, 123 and 124 (four channels are shown in the figures) and can have one or more supply channels that run parallel to the longitudinal axis 101 and partially inside the silo tube 110. In the example shown, the silo pipe 110 has four supply channels. In Figure 3 two of four supply channels 125 and 126 can be seen. The supply channels 125 and 126 can be gas-tight and in the silo tube 110 be separated from the channels 121, 122, 123 and 124 of the silo tube 110, for example, via a web 131 or a tube. Lines such as compressed air lines, electrical lines, hydraulic lines, data lines or water lines can be arranged in the interior of the supply channels 125 and 126. For example, the vibrator unit 140 can be supplied with electrical voltage via an electrical line that leads from the first end 111 of the silo tube 110 through the supply channels to the vibrator unit 140. In one example of the vibrator arrangement, water can be conducted to the second end 112 of the silo pipe 110 through the supply channels 125 and 126 or through a water line which lies in the supply channels 125 and 126. The vibrator arrangement can also have separate compressors for generating compressed air for each channel 121, 122, 123 and 124 of the silo tube 110. The supply channels can be arranged around the vibrator unit 140 and distributed evenly.

The supply channels 125 and 126 or the lines in the supply channels 125 and 126 can open into at least one of the channels 121, 122, 123 and 124 of the silo tube 110 in the area of the vibrator unit 140. As an alternative to this, the supply channels 125 and 126 or the lines in the supply channels 125 and 127 can also open into at least one of the channels 121, 122, 123 and 124 of the silo tube 110 in the region of the first end 111 of the silo tube 110. Furthermore, it is possible for at least some of the supply channels 125 and 126 or the lines in the supply channels 125 and 126 to lead out of the silo tube 110 at the second end 112 of the latter. In addition, the supply channels 125 and 126 or the lines in the supply channels 125 and 126 can open into the channels 121, 122, 123 and 124 of the silo tube 110 at several points.

In Figure 4 a sectional view of the silo pipe 110 is shown. The Figure 4 it can be seen that the silo tube 110 has four channels 121, 122, 123 and 124. The channels 121, 122, 123 and 124 of the silo tube 110 can be routed around the vibrator unit 140 and enclose the vibrator unit 140. The supply channels 125 and 126 can also be arranged around the vibrator unit 140. The vibrator unit 140 can be electrically operated via a supply channel 127 Be supplied with electricity. Compressed air is introduced into the channel 121 in the area of a plane 160 via the supply channel 125. In addition, compressed air can be introduced into the channel 121 in the area of a plane 161 which is arranged perpendicular to the longitudinal axis 101 of the silo tube 110. The silo tube 110 after Figure 4 can have a circular cross section in a plane which is oriented perpendicular to the longitudinal axis 101. The circular arrangement makes it possible to accommodate several supply channels in the silo tube 110. In the example shown, these are the supply channels 125, 126, 127, 128, 129, 171, 172, 173 and 174. Via the supply channels 125, 126, 127, 128, 129, 171, 172, 173 and 174, for example, water can be fed into the Borehole.

Figure 5 shows a sectional view of an exemplary silo pipe 110 with only one channel 121 and two supply channels 125 and 126. The vibrator unit 140 can be supplied with electrical power via the supply channel 126. Compressed air is introduced into the channel 121 in the area of a plane 160 via the supply channel 125. In addition, compressed air can be introduced into the channel 121 in the area of a plane 161 which is arranged perpendicular to the longitudinal axis 101 of the silo tube 110. It is possible to choose between a compressed air supply in the area of level 160 and a compressed air supply in the area of level 161 and to control them independently of one another.

Figure 6 shows a sectional view of an exemplary silo pipe 110 with two channels 123 and 124 and two supply channels 125 and 126. The vibrator unit 140 can be supplied with electrical power via the supply channel 127. Compressed air in the area of level 160 and / or in level 161 can be introduced into one of the channels 123 and 124 via the supply channels 125 and 126. The channels 123 and 124 are separated from one another in a gas-tight manner and can each be supplied with compressed air by a separate compressor and independently of one another. This ensures that both channels 123 and 124 can be supplied with the same pressure and the same volume flow of compressed air. A clogging of an individual channel can thereby be reliably prevented. The pressure and the volume flow of the compressed air can be in both channels 123 and 124 be different. Alternatively, the compressed air can be supplied to the two channels via a common compressor. In this case, a valve can be used that distributes the pressure and the volume flow of the compressed air to both channels, in particular evenly. The aim is to prevent significantly more compressed air from escaping through one of the two channels 123 or 124 than through the other channel 123 or 124.

Those related to the Figures 1-6 The vibrator arrangement described can be used for the production of stuffing columns. For this purpose, the vibrator arrangement with the filling arrangement 150 can be suspended from a crane or other lifting device (not shown). The vibrator arrangement can then be moved to the desired position on the stuffing column by crane. The vibrator unit 140 can be switched on and the second end 112 of the silo tube 110 can be brought into contact with the ground. Under the influence of the weight of the vibrator arrangement and the vibrations generated by the vibrator unit 140, the silo pipe 110 of the vibrator arrangement penetrates into the ground to a predefined depth and thereby creates a borehole (not shown). During the penetration of the silo tube 110 into the ground, water can be blown out at the second end 112 of the silo tube 110. This measure cools the second end 112 of the silo tube 110 and keeps the borehole free. The water can also flow off between the silo pipe 110 and the ground and from the second end 112 of the silo pipe 110 in the direction of the earth's surface. As a result, the friction between the silo pipe 110 and the ground can be reduced.

As soon as the silo tube 110 has penetrated the ground to the predefined depth, the crane can lift the vibrator arrangement a predefined distance out of the borehole and guide material from the channels 121 and 122 of the silo tube 110 into the borehole. The material can be conveyed out of the channels 121 and 122 under the action of gas, in particular compressed air. In one example, compressed air is introduced into the channels 121 and 122 in the region of the first end 112 of the silo tube 110 via one or more upper compressed air feeds. The number of upper compressed air supplies can be determined depending on the number of channels 121 and 122 in the Silo pipe 110 can be selected. This creates an overpressure inside the channels 121 and 122, which leads to the material in the channels 121 and 122 being pressed into the borehole. At the same time, the introduction of compressed air into the channels 121 and 122 prevents soil and sludge from penetrating into the channels 121 and 122. In addition, in the area of the plane 160, which is located between the vibrator unit 140 and the first end of the silo tube 110, one or more lower compressed air feeds (not shown) can open into the channels 121 and 122 of the silo tube 110 and compressed air at least partially into the channels 121 and 122 or through the channels 121 and 122 from the second end 112 of the silo tube 110 out. The plane 160 can be arranged perpendicular to the longitudinal axis 101. The number of lower compressed air supplies can be selected depending on the number of channels 121 and 122 in the silo tube 110. The line or the supply channel 125 or 126, which in the region of the second end 112 of the silo tube 110 introduces compressed air into the channels 121 and 122, can also be referred to as an injection line.

The use of an injection line has the effect that the material from the channels 121 and 122 is carried away by the air flow and wedging of the material parts due to dilatance can be avoided or weakened. Dilatancy is understood to mean an increase in the volume and thus an increase in the viscosity of a granulate such as a material. The dilatancy occurs in densely packed granular material that is subject to high shear forces. This is the case if the material is only blown out of the channels 121 and 122 via the upper compressed air supply. As a result, the channels 121 and 122 in the area of the second end 112 of the silo tube 110 are blocked. The additional use of the injection line ensures that the material can be discharged unhindered from the channels 121 and 122 into the borehole. The pressure and the volume flow that is introduced into the channels 121 and 122 via the injection line can be controlled. Depending on the nature of the material, the pressure and the volume flow in the injection line (lower compressed air supply) can be regulated. In addition, the pressure and the volume flow of the upper compressed air supply can be regulated. By supplying compressed air via the upper compressed air supply and / or the lower A material-air mixture can arise in the silo tube 110 when the compressed air is supplied. The proportion of air in the material-air mixture can be increased through the lower compressed air supply. As a result, the material-air mixture is loosened, as a result of which its viscosity drops and the material-air mixture can be more easily discharged from the silo tube 110.

After the material has been introduced into the borehole, the vibrator arrangement is reintroduced into the borehole by a predefined distance and the material introduced is thereby clogged laterally in the ground and compacted. The process steps described can be repeated until the stuffing column is completed in the desired diameter.

Figure 7 Fig. 13 shows a perspective view of a vibrator assembly according to another example. This vibrator arrangement comprises a silo tube 510, a filling arrangement 550 for charging the silo tube 510 with material and a supply unit 520 for feeding material into the filling arrangement 550. The material can be, for example, rubble, sand, gravel or a mixture thereof. The silo tube 510 has a longitudinal axis 501 and a first end 511 and a second end 512. The silo tube 510 and the filling arrangement 550 of the vibrator arrangement can be rotationally symmetrical to the longitudinal axis 501. The filling arrangement 550 opens into the silo tube 510 at the first end 511 and can receive material and guide it into the silo tube 510. The supply unit 520 can convey and fill material for the filling arrangement 550 of the silo tube 510. For this purpose, the supply unit 520 can be arranged at least on the silo tube 510 or on the filling arrangement 550 in such a way that the supply unit 520 can move parallel to the longitudinal axis 501 of the silo tube 510. The vibrator arrangement can have a vibrator unit 540 which can be attached in the area of the second end 517 and in the interior of the silo tube 510.

The silo tube 510 can have at least two channels 513, 514, as shown on the basis of the Figures 1-6 was explained. However, this is only an example. The silo tube 510 can also be designed such that it has only one or more channels.

The vibrator arrangement can have a support frame 560 which is arranged on a side of the filling arrangement 550 which faces away from the first side of the silo tube 510. The vibrator arrangement can be suspended from a crane via the support frame 560. The support frame 560 can be constructed as a tubular space frame and have one or more cable winches 530 and 531. The cable winches 530 and 531 can be fastened to the support frame 560 in terms of their position and their orientation to the support frame 560 and have cables 532 and 533, one end of which is fastened to the respective cable winch 530 and 531 and another end to the supply unit 520.

In the example of Figure 7 the vibrator arrangement has two cable winches 530 and 531 with cables 532 and 533. The cables 532 and 533 can each be guided over a deflection pulley 534 (another deflection pulley, which is attached to the support frame 560 for the cable winch 531, is not shown), which is attached to the support frame 560. In addition, the cables 532 and 533 can be guided over further deflection pulleys 535, 536, 538 and 539, which are attached to the supply unit 520. The support frame 560 and the supply unit 520 can each have a cross section perpendicular to the longitudinal axis 501 of the silo tube 510. The cross sections of the support frame 560 and the supply unit 520 can be rectangular in shape. For the most stable possible guidance of the supply unit 520 on the silo tube 510 and on the filling arrangement 530, in particular with a torsion-resistant relative to the longitudinal axis 501, the deflection rollers 534, 535, 536, 538, 539 and the further deflection roller can be as far away as possible from the longitudinal axis 501 of the silo tube on the support frame 560 and be arranged on the supply unit 520.

The ropes 532 and 533 can be wound or unwound from the rope winches 530 and 531. Provided that the silo tube 510 is approximately perpendicular to the ground, the supply unit 520 can move away from the support frame 560 along the longitudinal axis 501 of the silo tube 510 when the ropes 532 and 533 are unwound from the winches 530 and 531. The reverse applies to winding. As an alternative to the described cable winch concept, the vibrator arrangement can also have three or more cable winches. In one example, the vibrator assembly have four cable winches, whereby a tilting of the supply unit 520 can be ensured even without the use of pulleys. The four ropes of the four rope winches can be mechanically connected directly to the supply unit 520 at the points where the pulleys 535, 536, 538 and 539 are mounted in the previous example.

In one example of the vibrator arrangement, the silo tube 510 of the vibrator arrangement can be replaced by the silo tube 110, which is used in connection with the Figures 1 - 6 has been described. The vibrator arrangement can be suspended from a crane or an excavator via a pulley 570. The deflection roller 570 can also be referred to as a roller head.

In Figure 8 an exemplary vibrator arrangement is shown in a perspective view. The Figure 8 It can be seen that the supply unit 520 can be a tubular space frame in which one or more material containers 521 or 522 are arranged. The supply unit 520 can surround the filling arrangement 550 of the vibrator arrangement and be arranged on the latter. The supply unit 520 can have guide elements 523 which rest on an outside of the filling arrangement 550 and guide the supply unit 520 on the filling arrangement 550. The filling arrangement 550 and the silo tube 510 can have different cross-sectional areas and cross-sectional shapes perpendicular to the longitudinal axis 501 of the silo tube 510. For example, the silo tube 510 can have a circular cross section and the filling arrangement 550 can have an elliptical shape.

The guide elements 523 can be designed so that they can adapt to the different cross-sections and can guide the supply unit 520 both on the filling arrangement 550 and on the silo pipe 510. For example, the guide elements 523 can be rollers or runners which are pressed by a spring perpendicular to the longitudinal axis 501 of the silo tube 510 against the filling arrangement 550 or the silo tube 510. In one example of the vibrator arrangement, the guide elements 523 can also be designed such that the supply unit 520 cannot rotate about the longitudinal axis 501 of the silo tube 510. For example, can the guide elements 523 have a rail system. It is also possible that both the silo tube 501 and the supply unit 520 are arranged and guided on a leader (not shown).

In the Figures 9 and 10 the supply unit 520 is shown in section. When the vibrator arrangement is in operation, the longitudinal axis 501 can be parallel to an effective direction of gravity and / or thus approximately perpendicular to the earth's surface. The two material containers 521 and 522 can be arranged on opposite sides of the silo tube 510 in relation to the longitudinal axis 501 of the silo tube 510. Furthermore, through the design of the two material containers 521 and 522, it can be achieved that the weight distribution of the material added to them is likewise approximately equal parts by weight to the left and right of the longitudinal axis 501. This symmetrical arrangement in relation to the weight allows the weight of the supply unit 520 to be balanced so that the center of gravity of the supply unit 520 when the vibrator arrangement is in operation lies on the longitudinal axis 501 of the silo tube 510 and also moves along this longitudinal axis 501, both when it is full and when it is full in the empty state of the material containers 521 and 522. The supply unit 520 thereby does not transfer any bending moment to the silo tube 510 or to the filling arrangement 550, which would lead to an at least undesired but often impermissible deviation from the verticality during the production of the material columns. The design can also ensure that the orientation of the longitudinal axis 501 in relation to the earth's surface does not change regardless of a loading state of the material containers 521 and 522. The material containers 521 and 522 can also be replaced by a material container (not shown) designed as an integral component. The statements on the material containers 521 and 522 apply equally to the material container as an integral component, which can also be referred to as a hopper.

The Figures 9 and 10 it can also be seen that the material containers 521 and 522 taper in the direction of the silo tube 510 and can open into the filling arrangement 550. A pipe section 551 and 553 is arranged in the filling arrangement 550 for each material container 521 and 522, which pipe section guides the material from the material container 521 and 522 at least into the filling arrangement 550 or into the silo pipe 510. A material valve 552 or 554, which enables or blocks the flow of material into the silo tube 510, can be arranged on the sides of the pipe sections 551 and 553 facing the silo tube 510. The material in the material containers 521 and 522 can be emptied into the filling arrangement 550 via closures which open into the pipe sections 551 and 553. The closures can be, for example, snap locks, cone locks or slide locks. The closures can be both active and passive components.

The Figures 11 and 12 show an exemplary vibrator arrangement in a perspective view and in a plan view. In the example shown, the silo tube 510 has two channels 521 and 522, which extend along the longitudinal axis 501 of the silo tube 510 and are separated from one another by a web 561. In the web 561 and between the two channels 521 and 522, a supply channel 525 can be arranged, which can accommodate compressed air lines, water lines, hydraulic lines or electrical lines, for example. The supply channel 525 can also be a water line in itself, which guides water to the second end 512 of the silo pipe 510.

In the exemplary vibrator arrangement in Figure 12 it can be seen that the two pipe sections 551 and 553 are arranged offset from one another in the silo pipe 510. This arrangement has the effect that the pipe sections 551 and 553 can protrude further into the interior of the silo pipe 510, thereby making it easier to fill the silo pipe 510 with material from the material containers 521 and 522.

During operation of the vibrator arrangement, the silo tube 510 of the vibrator arrangement can have at least partially penetrated into the ground. During the subsequent production of a stuffing column, material is introduced via the silo tube 510 into a borehole (not shown) formed by the silo tube 510. For this purpose, the supply unit 520 is lowered by the cable winches 530 and 531 along the silo tube 510 to the surface of the ground. While the supply unit 520 is standing on the ground, the cables 532 and 533 are held taut by the cable winches 530 and 531 by a slight pre-tension.

As long as the supply unit 520 is on the ground or in the vicinity of the ground, the material containers 521 and 522 can be filled with material, for example by a wheel loader. In one example of the vibrator arrangement, the hopper 610 can be configured in such a way that it can be loaded completely and without restriction from only one side of the material container. The same also applies to an exemplary supply unit 520 with two or more material containers 521 and 522. In these cases, the material containers 521 and 522 can be designed and mechanically coupled to one another in such a way that, starting from one side of the supply unit 520, all of the material containers 521 and 522 of the supply unit 520 can be loaded. For example, the material containers 521 and 522 can be funnel-shaped for this purpose and can be connected to one another via a channel that guides material from one into the other material container 521 and 522.

After the material containers 521 and 522 have been loaded, they can be pulled by the cable winches 530 and 531 along the silo tube 510 in the direction of the first end 511 of the silo tube 510 as far as the filling arrangement 550. The cable winches 530 and 531 pull the supply unit 520 exactly as far to the filling arrangement 550 that the material containers 521 and 522 can be emptied into the filling arrangement 550 via the closures. The material is then at least partially fed into the filling arrangement 550 or into the silo tube 510 via the valves 552 and 554. After the material from the material containers 521 and 522 has been at least partially fed into the filling arrangement 550 or into the silo tube 510, the supply unit 520 can be moved back towards the ground by the cable winches 530 and 531. There the material containers 521 and 522 can be filled again and conveyed to the filling arrangement 550 of the vibrator arrangement. Thanks to the cable winches 530 and 531 mounted on the vibrator arrangement, the vibrator arrangement can penetrate further into the ground, fill the borehole or compact the material in the borehole, independently of the filling of the material containers 521 and 522. This process can be repeated until the stuffing column is completely filled.

In one example of the vibrator arrangement, driving the silo tube 510, controlling the winches 530 and 531, and the fluid valves 552 and 554 of FIG an at least partially automated control (not shown) can be taken over. In addition, it is possible that the process of filling the borehole and loading the silo tube 510 with material can take place simultaneously and without any coordination effort by the crane operator. It is thereby possible to convey larger quantities of material per unit of time into the silo tube 510 than would be possible without such a control. In addition, it is possible that the processes of filling the borehole and loading the silo tube 510 with material can take place simultaneously.

As an alternative to the cable winches 530 and 531, the supply unit 520 can also be moved along the silo tube 510 by a further cable winch. This alternative can also be referred to as the riding style of the supply unit 520. The vibrator arrangement can be attached to the crane via a double pulley head and controlled electronically for a twist-proof attachment and / or for cable guidance when using the additional cable winch. The electronic control can be designed, for example, so that a movement of the silo tube 510 into or out of the borehole is compensated for by the additional cable winch. A crane operator can completely control the vibrator arrangement using simple commands. There is no need for manual and separate control of the vibrator, crane and supply unit.

For example, the supply unit 520 can be controlled via the further cable winch in such a way that the supply unit 520 does not move or moves only in a predefined manner relative to the silo tube 510. The movements of the silo tube 510 can be synchronized with the movements of the supply unit 520. In this alternative, the weight of the supply unit 520 is taken up by the additional cable winch. In this alternative, the supply unit 520 can only transmit a very small or no bending moment to at least the silo pipe 510 or the filling arrangement 550. The center of gravity of the supply unit 520 can therefore also lie outside the longitudinal axis 501 and move outside the longitudinal axis 501 without a significant bending moment being created on the silo pipe 510 or the filling arrangement 550.

In Figure 13 an upper side of an exemplary vibrator arrangement is shown, which has the deflection roller 570 and four cable winches 571, 572, 573 and 574. The vibrator arrangement can be suspended from a crane or an excavator via the deflection roller 570. The ones in the Figures 7 to 12 The illustrated vibrator arrangements each have two cable winches 530 and 531 with which, for example, the supply unit 520 is moved along the silo pipe. In contrast, the exemplary vibrator arrangement in FIG Figure 13 two additional winches. The cable winches 571, 572, 573 and 574 shown are used to move the supply unit 520. The ropes of the cable winches 571, 572, 573 and 574 can be attached to the four outermost corners of the supply unit 520 to allow the supply unit to rotate around the longitudinal axis (in Fig. 13 not shown). A synchronous winding or unwinding of the cable winches 571, 572, 573 and 574 moves the supply unit 520 along the silo pipe.

Figure 14 FIG. 10 shows a perspective view of an exemplary pouring hopper 610. The pouring hopper 610 can have one or more material pits 621 and 622 and one or more guide rails 631. The hopper 610 can be guided by the guide rails at least on the silo tube 510 or on the filling arrangement 550.

The two material pits 621 and 622 can be arranged parallel and at a predefined distance from one another and be symmetrical in area to one another with respect to a predefined plane. Each of the material pits 621 and 622 can have a first side surface, the two first side surfaces running genuinely parallel to one another and also parallel to the predefined plane. The two material pits 621 and 622 can be mechanically connected via a drainage plate 611 to form a U-shaped, in particular horseshoe-shaped, pouring hopper 610. For this purpose, the drainage plate 611 connects the two first ends of the material pits 621 and 622. A U-shaped pouring hopper 610 can be understood to mean that it is in the installed state and while it is moving at least along the silo pipe 510 or the filling arrangement 550, at least the silo pipe 510 or encompasses the filling arrangement 550 in a U-shape. For example, the U-shaped hopper 610 can be the silo pipe 510 or enclose the filling assembly 550 at an angle of 160 ° to 300 °, an angle of 160 ° to 200 ° or an angle of approximately 180 °. The same also applies to a horseshoe-shaped hopper.

The drainage plate 611 can be designed in the form of a two-sided ramp. In each case one side of the two-sided ramp drops in the direction of one of the material pits 621 and 622, so that material is distributed over the two material pits 621 and 622 when it is filled in the area of the drainage plate 611. The highest point of the two-sided ramp can lie in the predefined plane and thus be arranged parallel to the two side surfaces at the same time.

The hopper 610 can also be accommodated in the supply unit 520 or linked directly from the cable winches 530 and 531. The hopper 610 can be articulated and moved via the cable winches 530 and 531 in the same way as was already described in connection with the supply unit 520. For example, the hopper 610 can be suspended from at least four of its outer corners via deflection pulleys and moved along the vibrator arrangement with the cable winches 530 and 531. The material pits 621 and 622 are arranged in such a way that, in the assembled state of the hopper 610 on the vibrator arrangement, they are arranged on opposite sides of at least the silo pipe 510 or the filling arrangement 550.

The drainage plate 611 can serve to facilitate filling of the hopper 610. The drainage plate 611 can be designed in such a way that an even filling of the hopper 610 is promoted and the material is evenly distributed over both material pits 621 and 622 when it is poured into the hopper 610. Furthermore, the geometric shape of the material pits 621 and 622 can be designed in such a way that the material is largely deposited in such a way that its center of gravity is approximately in the axis 501.

Figure 15 shows the hopper 610 in a further perspective view. Each of the material pits 621 and 622 may have one or more closures 641 and 642. In the example shown, the two closures are 641 and 642 Flap closures, the closure 641 being shown in the open state. In addition, other types of locks, such as cone locks or slide locks, can also be provided. The closures can be active or passive components and can also be referred to as valves.

In one example, closures 641 and 642 can be spring loaded closures, particularly flap valves. These can be designed in such a way that, in the closed state, they are already prestressed in their opening direction. For this purpose, springs can be used which are tensioned when the locks 641 and 642 are closed. After the pouring funnel 610 has reached a predefined position in the area of the filling arrangement 550, the closures 641 and 642 can be unlocked via a suitable unlocking mechanism. Due to the force of the springs, the closures 641 and 642 open automatically and the material can flow out of the pouring funnel 610 and into the filling arrangement 550. If the pouring funnel 610 leaves its predefined position again in the area of the filling arrangement 550, the closures 641 and 642 can be closed again automatically by means of a suitable mechanical device and with tensioning of the springs.

Figure 16 shows a sectional view of a vibrator arrangement with a silo pipe 651 and a longitudinal axis 650 of the silo pipe 651. A filling arrangement 652 is arranged on the silo pipe 651 on a first side of the silo pipe 651. The filling arrangement 652 runs parallel to the longitudinal axis 650. The vibrator arrangement can also be one of the vibrator arrangements described otherwise.

In the example shown, a hopper 653 is in a predefined position on the filling arrangement 652, in which material can flow from the hopper 653 into the filling arrangement 652. This position can be referred to as the filling position. The hopper 653 can be the hopper 610 already described. The material can flow independently from the pouring funnel 653 via at least one valve 660 into the filling arrangement 652 or be conveyed into it, wherein the valve 660 can be a slide valve with a slide plate 662. The valve 660 can also be a guillotine valve or be referred to as such, the functional principle of the valve being similar to that of a guillotine. It can be attached to the filling assembly 652 or to the hopper 653. If the valve 660 is attached to the pouring funnel 653, it also moves with this during operation parallel to the longitudinal axis 650.

In Figure 17 a detailed view of the valve 660 can be seen. The illustration shows the valve 660 in the filling position of the pouring funnel 653. The valve 660 is therefore shown in the open state and material can flow from the pouring funnel 653 into the filling arrangement 652. In the closed state, the valve 660 can be pretensioned in the closing direction by the action of a spring 663. In the example shown, the closing direction runs parallel to the longitudinal axis 650 and away from the first end of the silo tube 651. The spring 663 can be connected to the slide plate 662 at a first end and to the hopper 653 at a second end. The spring 663 can be mounted with its second end on the hopper 653. The preload by the spring 663 enables the valve 660 to be reliably closed if the pouring funnel 653 is not located at the predefined filling position but is moved, for example, along the vibrator arrangement. If the pouring funnel 653 moves from the silo tube 651 in the direction of the filling position, a side of the slide plate 662 opposite the spring 663 first rests against a stop point 664 on the filling arrangement 652. If the pouring funnel 653 then moves further in the direction of the filling position, the slide plate 662 is pressed against the force of the spring 663. As a result, an opening 665 in the slide plate 662 also moves against the force of the spring 663 and opens a passage for material from the hopper 653 into the filling arrangement 652. If the hopper 653 is moved away from the predefined filling position, the force of the spring causes an automatic one Closing the passage. This is achieved in that the opening 665 moves into its starting position and the slide plate 662 prevents the material from flowing out of the hopper 653. According to an in Figure 18 In the example shown, the slide plate 662 can also be moved via a linear drive 666. The linear drive 666 can be a hydraulic, an electric or a pneumatic linear drive.

The material in the hopper 653 is emptied into the filling arrangement 652 mechanically and automatically by moving the hopper 653 into the predefined filling position. The valves 660 and 661 can be identical in structure and function and can be arranged on opposite sides of the filling arrangement 652. Figure 19 illustrates an exemplary supply unit 700 with a silo pipe 701 and a hopper 710. The hopper 710 is guided on the silo pipe 701 via a guide system 720 and is connected to at least one cable winch (not shown) via cables 711 and 712. With the aid of the ropes 711 and 712, the hopper 710 can be moved along the silo tube 701. When moving the hopper 710, the guide system 720 can prevent the hopper 710 from tilting with respect to the silo pipe 701.

The hopper 710 and the guide system 720 can also be connected to a frame 730. At least one spring strut can be attached to the side of the frame 730 facing away from the hopper 710. In the example shown, four spring struts 740, 741, 742 and 743 are shown, which are directed towards the surface of the earth or towards the subsoil to be processed. When moving the hopper 710 along the silo pipe 701, if it has to be refilled, it is placed on the ground to be processed. The spring struts 740, 741, 742 and 743 are intended to cushion any contact with the ground to be processed and thus protect the entire vibrator arrangement and in particular the hopper 710 from damage. The suspension struts 740, 741, 742 and 743 can, in addition to pure suspension struts, also be spring-damper struts, as a result of which an additional vibration induced by the contact is dampened.

Figure 20 FIG. 13 shows an enlarged sectional view of FIG Figure 19 . The guide system 720 has two guide arms 721 and 722, each of which can be designed as a double scissor linkage. The two guide arms 721 and 722 are pressed against one another via springs, hydraulic linear drives or a gas pressure damper 723 and thus enclose the silo tube 701 on one side. Between the two guide arms 721 and 722 there is an opening 724 through which the silo pipe 701 protrudes when the guide arms 721 and 722 are closed. At each of the The side of the guide arms 721 and 722 facing the silo tube 701 can each have a guide roller 725 attached. The guide arms 721 and 722 can roll over this guide roller 725 when the hopper 710 is moved along an outside of the silo pipe 701. The guide arms 721 and 722 can thereby guide the hopper 710 along the silo pipe 701 or on a filling arrangement 550 attached to the silo pipe 701 with little wear.

In Figure 21 Exemplary methods for filling the silo tubes of the vibrator arrangements described are shown. The Figures 21a to 21d show method steps of a first method variant. The illustrated vibrator arrangement has a silo tube 810 and a supply unit 820, wherein the silo tube 810 can be separately connected to a crane or an excavator and suspended from a crane or an excavator via a rope 811 and the supply unit 820 via a rope 821. For this purpose, a cable winch can be provided on the crane or excavator for both the cable 811 and the cable 821. The suspended silo tube 810 is then placed on a substrate 800 to be processed and a borehole 801 is then drilled into it. In the Figures 21a to 21d the silo tube 810 is constantly moved up and down via the rope 811, while the supply unit 820 can be moved independently of this via the rope 821 relative to the silo tube 810. In Figure 21a the supply unit 820 is lowered in the direction of the subsurface 800. When the supply unit 820 has reached the ground 800, the movement of the cable 821 is stopped and the supply unit 820 stands on the ground 800 solely by its own weight. The supply unit 820 can be filled with new material. Figure 21c shows how, after filling, the supply unit 820 is pulled up again along the silo pipe 810 via the rope 821 and away from the ground 800. In Figure 21d the supply unit 820 has arrived at its predefined filling position on the silo tube 810 or on the filling arrangement attached to it. The rope 821 is moved in such a way that the supply unit 820 moves synchronously with the silo tube 810. This achieves synchronization between the silo tube 810 and the supply unit 820, which allows the material from the supply unit 820 to be transferred to the silo tube 810 in a process-reliable manner.

The Figures 21e to 21h show method steps of a second method variant. In this example, the silo pipe 810 is suspended from an excavator or a crane by means of a rope 811. The silo tube 810 also has a support frame 830 which is mechanically connected to the silo tube 810. The supply unit 820 is attached to the support frame 830 via at least one cable 821. The supply unit 820 can be moved relative to the support frame 830 and thus also relative to the silo tube 810 via the cable 821. For this purpose, at least one cable winch can be attached on or in the support frame 830. In Figure 21e the supply unit 820 is lowered in the direction of the ground 800, during which the silo tube 810 is moved up and down via the rope 811. In Figure 21f the supply unit 820 stands on the ground 800 while the silo pipe 810 is moved up and down. The ropes 821 of the supply unit 820 move anti-cyclically to the movement of the silo tube 810 during this method step. This can be understood to mean that the ropes 821 are pulled up in the direction of the support frame 830 while the silo tube 810 moves in the direction of the ground 800. The same applies vice versa. If the silo tube 810 moves out of the borehole 801, the cables 821 are unrolled from the support frame in the direction of the ground. The rope winch on the crane or excavator always moves the rope 811 in this state against the direction of movement of the rope 821. In Figure 21g the silo tube 810 continues to move up and down, whereas the supply unit 820 is lifted away from the ground 800 via the cables 821. In Figure 21h the supply unit 820 has arrived at its predefined filling position on the silo tube 810 or on the filling arrangement attached to it. The movement of the rope 821 is stopped and the supply unit 820 then moves synchronously with the silo tube 810. This results in synchronism between the silo tube 810 and the supply unit 820, which allows the material from the supply unit 820 to be transferred to the silo tube 810 in a process-reliable manner. The silo tube 810 is also moved up and down in the borehole during the transfer.

Claims (15)

1. A vibroflotation device, which comprises:

   a silo tube (110) having a longitudinal axis (101) and a first end (111) and a second end (112);

   a vibroflotation unit (140), which is mechanically coupled to the silo tube (110), and

   a filling arrangement (150), which opens into the silo tube (110) and is designed to accommodate material and conduct it into the silo tube (110), wherein

   the silo tube (110) has at least two separate channels (121; 122) from the first end (111) to the second end (112) and in parallel to the longitudinal axis (101),
   characterized in that

   the filling arrangement (150) opens into the silo tube (110) at the first end (111).
2. The vibroflotation device as claimed in claim 1, in which the supply tube (110) has at least two supply channels (125; 126), which each open into one of the channels (121; 122) and are designed to introduce compressed air into the channels (121; 122) .
3. The vibroflotation device as claimed in claim 2, which is designed to control pressure and volume flow of the introduced compressed air separately for each channel (121; 122).
4. The vibroflotation device as claimed in any one of claims 1 to 3, in which the at least two channels (121; 122) are separated from one another gas-tight.
5. The vibroflotation device as claimed in any one of the preceding claims, in which the channels (121; 122) are separated from one another by one or more webs (131).
6. The vibroflotation device as claimed in any one of the preceding claims, in which the filling arrangement (150) has at least two chambers (151; 152), each of which opens into one of the at least two channels (121; 122).
7. The vibroflotation device as claimed in any one of the preceding claims, in which each of the at least two chambers (151; 152) has at least two valves (154; 155; 156; 157).
8. The vibroflotation device as claimed in any one of the preceding claims, which furthermore has:
   at least one upper compressed air supply, which opens into one of the at least two channels (121; 122) in the region of the first end (111) of the silo tube (110) and is designed to conduct compressed air into the interior of the one channel (121; 122).
9. The vibroflotation device as claimed in claim 8, which has a number of upper compressed air supplies corresponding to the number of the channels, wherein each of the upper compressed air supplies opens into respectively one of the at least two channels (121; 122) in the region of the first end (111) of the silo tube.
10. The vibroflotation device as claimed in any one of the preceding claims, which furthermore has:
    at least one lower compressed air supply, which opens into one of the at least two channels (121; 122) in the region of a plane (160) of the silo tube (110) and is designed to conduct compressed air into the interior of the one channel (121; 122).
11. The vibroflotation device as claimed in claim 10, which has a number of lower compressed air supplies corresponding to the number of the channels, wherein each of the lower compressed air supplies opens into respectively one of the at least two channels (121; 122) in the region of the second end (112) of the silo tube (110).
12. The vibroflotation device as claimed in any one of the preceding claims, in which the silo tube (110) has at least one supply channel (125; 126; 127; 128; 129; 171; 172; 173; 174) which extends in parallel to the longitudinal axis (101) and in the interior of the silo tube (110).
13. The vibroflotation device as claimed in claim 12, in which the at least one supply channel (125; 126; 127; 128; 129; 171; 172; 173; 174) is designed to accommodate at least one compressed air line or an electric line.
14. The vibroflotation device as claimed in any one of the preceding claims, in which the vibroflotation unit is attached at the second end (111) of the silo tube (110).
15. The vibroflotation device as claimed in any one of the preceding claims, in which the at least two channels (121; 122) of the silo tube (110) have at least approximately equal surface areas in a cross-sectional plane which extends perpendicularly to the longitudinal axis of the silo tube (110).

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