KR19990029599A - Slurry wall device - Google Patents

Abstract

An adjustment mechanism is provided on the slurry wall device with cable mounting with a support cable for guiding the slurry wall device, and the support cable contact point moves laterally so that the slurry wall device can be controlled for its deflection in the trench. This allows the orientation of the slurry wall device and consequently its contact angle on the bottom of its bore hole is controlled using particularly simple means. It is also possible to remount the slurry wall device having such an adjustment mechanism.

Description

Slurry wall device

The present invention relates to a slurry wall device having a cable mounting with a support cable for supporting and guiding the slurry wall device and a mechanism for directional control of the slurry wall device.

Slurry wall grabs or cutters make narrow trenches or open holes up to 80 m deep. As a function of a particular application, the trench width is usually between 300 mm and 1500 mm. The slurry wall device is lowered into the trench produced by the support cable and is oriented and positionally stabilized by the side guide frame. The dimensions of the guide frame generally coincide with the cross section of the cutting wheel arrangement of the open shovel or scoop or slurry wall cutter of the slurry wall grab.

Usually trenches are made that are exactly vertical. However, sometimes it is necessary to deviate slightly from the vertical to meet specific needs. Therefore, it is important to be able to carry out direction modifications or changes for this case where the slurry wall apparatus can be directionally controlled to some extent. This control can be initiated by turning the grab blades in the case of grabs. For this purpose, it is necessary to turn the bearing block with the grab blades mounted thereon for the entire structure of the slurry wall grab. As a result, a change in direction can be made and possible deviations from a given vertical trench orientation can be corrected. This is disclosed in JP-A-560 077 423 or DE-C-3602 387.

Another directional control possibility exists in structuring the parts of the guide frame in a movable or slidable manner to plan the inclination of the slurry wall device by the planned movement or deflection of the guide frame parts and their interaction with the trench walls. . The use of so-called control flaps can be obtained from DE-A-38 05 868 or DE-C-41 19 212.

Two possibilities of directional control of slurry wall grabs are known from EP 412 477 B1.

On the basis of the slurry wall apparatus mentioned above, it is an object of the present invention to provide a slurry wall apparatus capable of directional control in a highly accurate manner using simple means.

1 is a front view of the slurry wall grab according to the present invention,

2 is a side view of the slurry wall grab according to the present invention;

3 is a front view of the slurry wall grab according to FIG. 1, showing that the support cable contact points have been moved laterally,

4 is a side view of the slurry wall grab according to FIG. 2, showing that the support cable contact points have been moved laterally,

5 is a plan view of the first sun of the tuned earth,

6 is a plan view of a second sun of the tuned earth,

7 is a partial elevation view of a slurry wall cutter according to the present invention;

8 is a view in an inclined position of the slurry wall cutter according to FIG. 7, FIG.

FIG. 9A is a front view of another slurry wall cutter according to the present invention having a lever mechanism, FIG. 9B is a detailed view at the neutral position of the lever mechanism of FIG. 9A, and FIG. 9C is at an inclined position of the lever mechanism of FIG. 9A Detail view.

The object of the invention is achieved by claim 1.

Other advantageous aspects of the invention are given in the dependent claims.

According to the basic principle of the present invention, a slurry wall device having a cable mounting to which a support cable for guiding the slurry wall device and a mechanism for directional control of the slurry wall device is attached moves the attachment or contact point of the support cable from the side. The slurry wall device is controllable with respect to its vertical orientation so that an adjustment mechanism is provided. The slurry wall device has a cable mounting to which the support cable is fixed. Usually the cable mounting support directly forms the contact point of the support cable, which is essential for the action of the upward force of the support cable. However, the support cable may be guided or deflected at other points connected to the slurry wall device to form contact points of the cable mounting. The lateral movement of the contact point across the vertical line inclines the slurry wall device, since the center of gravity remains vertical all the time under the crane anchor of the device outside the trench.

Lateral or vertical movement of the support cable contact point is understood in such a way that the support cable normally contacts the geometric center of the slurry wall device where the center of gravity of the slurry wall device is located thereon and moved off the axis. On the one hand the connection of the center of gravity of the slurry wall device and on the other hand the contact point of the support cable to the geometry axis forms a different angle from zero. As a result of this movement of the support cable contact point, the eccentric suspension and thus the inclined position of the slurry wall grab are obtained so that the latter contacts the bore hole bottom at this deflected position.

Such control of the slurry wall device can be carried out at low cost, in particular allowing precise control to allow unnecessary interaction with the walls of the trenches made. In addition, existing slurry wall devices can relatively easily refit the control according to the invention.

The adjustment mechanism is preferably located above the top region of the slurry wall device. As a result, it is particularly easily accessible during maintenance work and can be easily fixed in case of refit. It is also possible to place the cable mounting in the slurry wall device and to guide the support cable up out of the slurry wall device, but it is also preferred that the support cable is fixed to the top region of the slurry wall device. However, cable mounting is preferably placed above the center of gravity of the slurry wall device, as this ensures stable guidance with the support cable.

In the case of slurry wall devices, which can be slurry wall grabs or slurry wall cutters, there is the possibility of positioning and moving the cable mounting directly to the adjustment mechanism. It is also possible to position the cable mounting above the slurry wall device above the adjustment mechanism and to carry the support cable through the movement of the adjustment mechanism and to move the support cable contact point again and consequently the slurry wall device to change its vertical position.

In the case of the first mentioned possibility, the cable mounting is located on a block movable in the X-direction within the rail, the rail moving in the Y-direction. Thus, a cable mounting that is movable in two directions in a simple manner is carried out. The second fundamental possibility can be implemented in such a way that two parallel rods are provided and the support cables are guided between them and move together in the X-direction. For this purpose, two additional parallel rods are provided, which are located perpendicular to the other two and are movable in the Y-direction. The support cable passes between parallel rods and is thus fixed in both X and Y-directions. As a result of the movement of the parallel rods, there is also a movement of the contact point of the support cable through the adjustment mechanism, which is fixed to the cable mounting located below the adjustment mechanism.

The adjustment mechanism is preferably such that the device is operated manually when the device is located outside the trench. Manual movement can be achieved by a worm gear or lever mechanism. In another aspect, the adjustment mechanism is preferably mechanically actuated and used as a hydraulic or electric hydraulic drive or electromechanical means, for example a hydraulic cylinder. Preferred is remote control for the operation of the adjustment mechanism. It is also advantageous to combine the drive means such that the adjustment mechanism can be operated manually or mechanically.

It is emphasized that in either case, the adjustment mechanism is designed for the movement of the support cable contact points in both the X and Y-directions, based on a plane running perpendicular to the support cable.

According to a preferred aspect of the present invention, the adjusting mechanism is constructed in such a way that the support cable contact point is in the geometric axis of the slurry wall device when the adjusting mechanism is in the neutral position. According to a preferred aspect the adjustment mechanism has a control mechanism which measures the vertical orientation of the slurry wall device and moves the cable mounting to the adjustment mechanism in such a way that the predetermined vertical orientation of the slurry wall device is set. This ensures a permanent and precise vertical orientation of the slurry wall device.

The slurry wall apparatus is preferably designed in such a way that the center of gravity is located just below the geometric center of the slurry wall apparatus. This is preferable because the closer the center of gravity is to the adjustment mechanism, the greater the direction deflection of the slurry wall device, and the greater the angle between the deflected support cable and the center of gravity on the one hand and the geometric axis on the other hand for constant deflection of the support cable. Do. It is also important for the stability of the slurry wall device that the center of gravity is below the geometric center, ie below the buoyancy center, because only in this way a stable upright position of the slurry wall device is achieved. Thus, if the center of gravity of the slurry wall device is just below its geometric center, it will best meet both requirements. For movement of the center of gravity, for example, the side guide frame can be made solid or hollow. Preferably, the slurry wall device guide frame is constructed in a hydraulically adjustable manner and has a control mechanism, which completes the setting of the guide frame so that there is no inclination or bending in the trench walls even when the slurry wall device is tilted. Readjust and calibrate as a deflection function of the slurry wall grab.

The present invention provides a controllable slurry wall device having a particularly simple structure and low manufacturing cost due to limited construction costs. It is also easy to refit the adjustment mechanism according to the invention to an existing slurry wall apparatus.

The invention is described in more detail with reference to the following aspects and the accompanying drawings.

1 and 2 show slurry wall grabs from two different aspects. An important element of slurry wall grab 1 is a shovel or scoop 2 in which a trench or opening is dug. Shovel 2 is operated by externally operated cables or by push and pull linkage 8 with hydraulic cylinder 9 located in slurry wall grab 1. Slurry wall grab 1 has a guide frame 6, the dimensions of which roughly match the dimensions of shovel 2, which are actually slightly smaller than the dimensions of shovel 2 to prevent it from tilting in the trench. The guide frame 6 has a grating structure 10 in the direction in which the shovel 2 opens and closes, so that the guide frame 6 coincides with the width of the shovel 2 in which the guide frame is opened. The width of the guide frame 6 in the other direction is apparent from FIG. 2. In the plane shown in FIG. 2, the width of the guide frame 6 is somewhat smaller than the width of the shovel 2. Center of gravity 4 of slurry wall grab 1 is indicated by a black circle. The height of the center of gravity 4 is also determined by the structure of the guide frame 6, which may be partially solid or empty to move the height of the center of gravity 4.

Slurry wall grab 1 has an adjustment mechanism 7 in its upper region, which essentially has an adjustment box 11 and a fastener 12. Fastener 12 detachably but securely connects adjustment mechanism 7 to the remaining slurry wall grabs 1. The support cable 3 which guides the slurry wall grab 1 and lowers it into the trench enters the adjustment box 11 of the adjustment mechanism 7. 1 and 2, the support cable 3 is fixed centrally to the geometric center of the adjustment mechanism 7. As a result, support cable 3 forms an extension of the geometry axis of slurry wall grab 1, on which the center of gravity 4 is also located.

3 and 4, the contact point of support cable 3 is moved out of geometry axis 13 of slurry wall grab 1. 1 and 2 the slurry wall grab 1 is oriented through the arrangement of the support cable 3 in the vertical position, and in FIGS. 3 and 4 the slurry wall grab 1 is deflected by the movement of the suspension point of the support cable 3. In FIG. 3 the deflection of the slurry wall grab 1 is represented by the displacement in the X direction of the support cable 3, and in FIG. 4 the deflection of the slurry wall grab 1 is represented by the movement in the Y direction of the support cable 3. This deflection originates from the angle between the geometry axis and its imaginary line between the center of gravity of slurry wall grab 1 and the moved contact point of support cable 3. This line is shown at 14 in FIGS. 3 and 4. From this it is clear that in order to obtain a larger deflection angle, the support cable 3 must be deflected more ie in a more eccentric position or the center of gravity 4 of the slurry wall grab 1 must be moved upwards. In other words, to achieve the same deflection angle of slurry wall grab 1, by placing the center of gravity 4 further upward, it is not necessary to deflect the support cable 3 so markedly. The height of the center of gravity 4 may be determined to some extent during the structure and design of the slurry wall grab 1, for example by the structure and design of the grab 1, in particular the structure of the guide frame 6. Therefore, the center of gravity 4 should be located below half of the slurry wall grab 1 to ensure its stability. As a result, it is desirable to design slurry wall grab 1 in such a way that its center of gravity 4 is directly below the geometric center of slurry wall grab 1. Through the movement of the support cable 3, the eccentric suspension of the grab and the orientation of the inclined position are obtained to contact the bottom of the bore hole under the same deflection angle. Thus, the bore direction can be changed in a planned manner. If desired, any displacement that occurs can be corrected by scraping the bore hole wall and a planned displacement can be obtained from the vertical. In order to assist this orientation, it may be advantageous to adapt the guide frame accordingly. For this purpose, a joint 17 between the brace 15 and the inner region of the slurry wall grab 1 is provided on the brace 15 of the grating structure 10, which joint 18 is also located between the brace 15 and the guide frame 6. Due to the joints 17 and 18, it is possible to pivot the guide frame 6 with respect to the remaining slurry wall grabs 1 at an angle approximately coincident with the deflection angle of the entire slurry wall grabs 1. In addition, the brace 15 can slide in and out by hydraulic pressure so that the width of the guide frame 6 can also be changed through the length of the brace 15, to adapt to the changed bore hole geometry if necessary if the slurry wall grab 1 is deflected.

5 is a plan view of the first aspect of the adjustment mechanism 7. In this aspect, the adjustment cable 3 passes through the adjustment box 11 and is fixed to the slurry wall grab 1 behind the latter. 5 and 6, the adjustment box 11 is rectangular. However, the adjustment box 11 may have a square or other structure. The dimensions of the adjustment box 11 should be such that the necessary deflection of the support cable is achieved in the box 11. The adjusting box 11 has two parallel rods 19 and 20 which are movable in the X-direction, between which the supporting cable 3 passes. Rods 19 and 20 are rounded to minimize friction with the support cables. The spacing of the two rods 19 and 20 is somewhat larger than the cross section of the support cable 3. The two rods 19 and 20 are also reinforced by transverse brace means 21, 22, which are located near the edge of the adjustment box 11. Parallel rods 19 and 20 move by both worm gears 23 and 24. However, it is also possible to use a hydraulic mechanism. The movement in the Y-direction takes place in a similar manner by two parallel rods 25, 26, which have bracing means 27, 28 located near the edge of the adjustment box 11. The support cable 3 also passes between these two rods 25, 26 such that the support cable 3 is fixed in a small area by the two transverse rod arrangements. The movement of the parallel rods 19, 20 and parallel rods 25, 26 makes it possible to arbitrarily change the contact point of the support cable 3 on the slurry wall grab 1, so that the deflection effect of the grab 1 described in connection with FIGS. 3 and 4 Is achieved. Parallel rods 25 and 26 may be replaced by a worm gear not shown. Above control box 11 is control mechanism 29, which is connected to two sensors 30 and 31 to measure the orientation of slurry wall grab 1 in the X and Y-directions. The control mechanism 29 is provided prior to the desired deflection of the slurry wall grab 1, so that the control mechanism 29 moves the parallel rods 19, 20 and 25, 26 in such a way that the support cable moves so that the slurry wall grab 1 enters the desired deflection exactly. The movement is controlled, which is measured by sensors 30 and 31 and the result determined by the latter is fed to the control mechanism 29. The control mechanism 29 may be used with great advantage for accurate vertical orientation of the slurry wall grab.

A second aspect of the adjustment mechanism according to the invention is shown in FIG. 6. Unlike the aspect of FIG. 5, here the cable mounting 40 of the support cable 3 is fixed directly to the adjustment box 11. In this aspect, a rail 32 movable in the X-direction is provided, which is moved by the hydraulic cylinder 33. The rail 32 travels in guides 34 and 35 fixed to the side of the adjustment box 11. The rail 32 has a tightening block 36 to which the support cable 3 is fixed. The tightening block 36 is movable in the Y-direction on the rail 32 by the hydraulic cylinder 37. Also in the aspect of this adjustment mechanism, it is also possible to use a control mechanism with the sensors 30 and 31 shown in FIG. Above the adjustment box 11 is also provided a receiver which is electrically connected to the actuating means by which the cable mounting 40 moves, which also forms a contact point of the support cable 3, ie the hydraulic cylinders 33 and 37. The receiver 38 can be controlled by the remote 39, which makes it possible to deflect the slurry wall grab 1 even when the latter is located in the trench during operation.

In this aspect it is also possible to use a circular adjustment box 11, in which case the rail 32 is rotated over the circular guides in the adjustment box and the movable bearing block is located on the rotary rail.

In the case of a so-called two-cable grab with support cable 3 and actuation cable, the adjusting mechanism 11 is firmly connected to the guide frame 6. As mentioned above, the support cable 3 is connected to the adjustment mechanism 11. The actuation cable is guided by passages or links. The support cable suspension points and the links are interconnected so that they can move jointly through the adjustment mechanism 11.

7 and 8 show a slurry wall cutter 51 according to the invention with a guide frame 56 and a cutting wheel 52. Guide frame 56 is suspended over support cable 53 by gimbal suspension 55. In the normal position the center axis of gravity center 54 and gimbal suspension 55 and an unshown support point, i.e., one end of the crane jib, are located jointly in a vertical line 64, so that the latter coincides with the geometry axis 63 of the slurry wall cutter 51.

The slurry wall cutter 51 has a manually changeable adjustment mechanism 57, which comprises a support 65 in a substantially vertical direction, which is mounted in a deflectable manner on the guide frame 56 by a spherical joint 66 at its lower end. At its top the support 65 is connected with a gimbal suspension 55 for a support cable 53. The support 65 penetrates the substantially horizontal guide plate 68 on the bearing plate 67. By means of a clamping mechanism 69 which can be inserted into a threaded bolt, the position of the guide plate relative to the bearing plate 67 securely fixed to the guide frame 56 and consequently the position of the support 65 can be fixed manually.

As shown in FIG. 8, the support 65 and consequently the gimbal suspension 55 move from the geometry axis 63 of the slurry wall cutter 51 through the horizontal movement of the guide plate 68. This results in a deflection from the vertical of the geometry axis 63.

9A shows another similarly structured slurry wall cutter 51a with guide frame 56 and support 65a pivotally mounted thereon. Gimbal suspension 55a for support cable 53a is fixed to the top of support 65a.

For deflection of the slurry wall cutter 51a to the left and right in the plane of the drawing, a first hydraulic cylinder 70 in a substantially horizontal direction is provided. The first hydraulic cylinder 70 is pivotally connected to the guide frame 56a on the one hand and to the support 65a on the other hand.

For pivoting the slurry wall cutter 51a perpendicular to the plane of the drawing, a second hydraulic cylinder 71 is provided at the bottom of the support 65a which is connected by a lever mechanism with a rectangular lever 72. As can be guessed from Figs. 9b and 9c, the lifting operation of the second cylinder is switched to the turn of the support 65a by a suitable swivel joint.

It is clear from the above that the fundamental advantage of the present invention consists of limited mechanical costs for implementing the control of the slurry wall apparatus. It also offers the possibility of simple remounting to existing slurry wall equipment.

Claims (13)

A slurry wall device having a cable mounting with a support cable for supporting and guiding the slurry wall device and a mechanism for controlling the direction of the slurry wall device, the adjustment of moving the support cable contact point across a vertical line on the slurry wall device. A slurry wall device, comprising a mechanism, wherein the orientation of the slurry wall device is controllable. 2. The slurry wall device of claim 1, wherein the adjustment mechanism is located in the top region of the slurry wall apparatus and the support cable is secured to the top region above the center of gravity of the slurry wall apparatus. The slurry wall device according to claim 1, wherein the slurry wall device is constructed as a slurry wall grab or a slurry wall cutter. 2. The slurry wall device of claim 1, wherein the cable mounting for the support cable and the guide for the actuation cable are movable through the adjustment mechanism. 5. The slurry wall device of claim 4, wherein the cable mounting is located on the block movable in one direction on the rail, and the rail is movable in a direction perpendicular to the block. The slurry wall device of claim 1, wherein the cable mounting is located below the adjustment mechanism. 7. The method of claim 6, wherein the adjustment mechanism has two parallel rods, between which support cables are guided and they are movable in the X-direction, and the adjustment mechanism has two different parallel rods between them. And guided and they are positioned perpendicular to two different parallel rods and movable in the Y-direction. 2. The slurry wall device of claim 1, wherein the adjustment mechanism is manually operable. 2. A slurry wall apparatus according to claim 1, wherein the adjusting mechanism has a means for operating mechanically and the adjusting mechanism is operated hydraulically. The slurry wall device according to claim 1, wherein a remote control is provided to control the adjustment mechanism. 2. A slurry wall device according to claim 1, wherein in the neutral position of the adjustment mechanism the support cable contact point is located above the vertical connecting line between the center of gravity of the slurry wall device and the suspension point of the crane located outside the trenches made. The apparatus of claim 1, wherein the adjustment mechanism has a control mechanism that sets the orientation of the slurry wall device according to a predetermined orientation, and the sensor is provided to measure the orientation of the slurry wall device in the X and Y-directions and to be electrically connected to the control device. Slurry wall device, characterized in that the. 2. The slurry wall device of claim 1, wherein the slurry wall device is designed in such a way that the center of gravity is located just below the geometric center of the slurry wall device.