EP0585657B1 - Method and device for replacing soil, especially next to roads and buildings - Google Patents

Abstract

Device (10) for replacing soil, especially next to roads and buildings, characterised by a sheeting arrangement of two parallel, vertical sheeting walls (12, 14) which are held at a distance apart and can be put into the ground by driving and/or into an excavated receiving pit; and a plate-shaped abutment (32) which is arranged transversely between the walls (12, 14) and is coupled to the sheeting walls (12, 14) via adjusting cylinders (34, 40). <IMAGE>

Description

The invention relates to a method and a device for exchanging soil material, in particular in addition to traffic routes, buildings or the like according to claim 1 or 2.

From EP-A-0 470 297 a method for soil exchange has become known, in which at least three tube-like containers with a rectangular cross-section are used in such a way that only the middle one or more middle ones are emptied from the jammed rams and that new soil material is introduced into the empty container or the empty container, the container be used along a working direction so that the rear container filled with new soil material is pulled out and is rammed in front of the front, rammed, container originally still contained in the ground. With the aid of such a method, the support measures or landfills that are otherwise involved in soil replacement work in the vicinity of structures or in operation are eliminated. The soil forces that occur are effectively absorbed by the containers, which support each other and form a formwork with a high level of support in relation to the adjacent, statically loaded floor. An open excavation pit directly next to traffic routes and buildings is omitted, and a container that is only temporarily empty is adequately secured by the neighboring container, so that no compromises have to be made with regard to the static load-bearing capacity of the adjacent floor. The use of at least three containers in the described mode of operation realizes a technological chain that allows continuous work.

The removal of soil material from the rammed containers, the refilling of empty containers with new soil material and also the compaction of the soil material appropriate tools must be used in the containers. There is also a corresponding device for ramming and pulling out the containers. In many cases, the space required for this is not available, for example if a floor exchange is to be carried out between railway tracks running at a short distance without the traffic on the tracks being restricted.

The containers are usually rammed in and pulled out with the help of suitable vibrators, which vibrate the entire container and thus the surrounding soil. Sometimes there is a risk that neighboring structures, such as buildings, bridges and the like, are endangered by vibrations.

From CH-A-582 282 a method for laying objects in the ground and a device for carrying out the method have become known, which can be referred to as moving formwork or excavation pit. Two formwork walls that are coupled to each other are driven forward step by step using a pressure plate in the rear area between the formwork walls. The formwork is used to ensure that workers have a safe stay between the formwork walls. At the same time, the trench in which the formwork is arranged is supported. When driving the formwork with the help of the pressure plate, first of all dug a trench into which the device is moved. With the excavation from the front trench section, the space behind the pressure plate can be filled.

A device of a similar type has become known from DE-A-24 61 254, in which a mobile scaffold can be moved on the formwork walls.

From US-A-3 969 904 a moving formwork or construction pit for laying pipes or the like has become known, in which the formwork walls can be extended downwards by suitable measures.

From EP-A-0 111 289 it has become known to provide a shoring plate for trench construction with a cutting-like front edge. A similar cutting-like design can also be found in a moving construction pit according to US-A-35 43 522. The cutting-like front edges of the formwork walls are also articulated about a horizontal axis on the formwork walls and their angle can be adjusted.

The invention is therefore based on the object of providing a method for exchanging soil material next to traffic routes without the need to move one using formwork structures or traffic routes at risk.

This object is achieved according to the invention by the features of patent claim 1.

In the method according to the invention, formwork walls are gradually driven horizontally, the upper edge of the formwork expediently projecting beyond the surface level of the floor. The area between the walls is divided into two sections. Old flooring material is removed from the front section, after which the formwork walls are moved horizontally. As a result, there is now an empty space in the rear area of the formwork walls that can be filled with new floor material. At the same time or afterwards, the now front area between the formwork walls can be emptied.

Driving the formwork does not require ramming into the ground and therefore the use of vibrators. Rather, the propulsion is carried out by means of suitable hydraulic adjusting cylinders. The plate-shaped abutment is supported on the compacted new floor material in order to horizontally advance the formwork walls by a certain stroke. For this it is necessary that after the formwork walls have been advanced, the plate-shaped abutment, e.g. B. in the form of a pressure plate, is brought into an approximately central position between the formwork walls before new floor material is introduced into the empty area of the rear formwork wall sections.

A device according to the invention for carrying out the method according to the invention is specified in claim 2. When improving the soil, geotextiles and / or drainage pipes can be laid at the same time.

So that the formwork walls are guided during the tunneling, the walls in the upper area are connected by at least one crossbar. As a result, the formwork walls can always be driven horizontally parallel to each other. In addition, suitable measures must be taken to ensure that the tunneling is carried out in the horizontal plane and that the formwork walls do not dig in or move diagonally upwards. This can be achieved by appropriate adjustment cylinders and suitable guide means in the lower area of the formwork walls. The advance of the formwork walls is facilitated if they are shaped like blades on the front vertical edges.

In particular for the front area of the formwork walls, it is advantageous if they are double-walled with internal stiffening. This prevents the formwork walls from undergoing undesirable deformation during the advance.

In order to obtain an adjustment to the width of the construction site along which a floor replacement is to be carried out, the length of the traverse can be adjustable. In this way, the distance between the formwork walls can be set to the desired distance. Traverse and / or pressure plate can be designed telescopically to change the length. In an alternative embodiment, the pressure plate and / or the crossmember can be constructed from these vertically dividing units of predetermined length. For example, these parts have a standard minimum length, whereby the length can be increased by adding units in stages.

It may be necessary to temporarily replace the floor in an area at a greater depth than is possible with the appropriate height of the formwork walls. This can be the case, for example, when crossing a more or less swampy area. An embodiment of the invention provides that the formwork walls in the front area are supported by a sword-shaped section that can be extended downwards. The sword-shaped section can be extended downwards or raised again, for example, by means of hydraulic adjusting cylinders. However, it is also possible to press the sword-shaped section down with the help of an excavator. The sword-shaped section is expediently only moved down during the exchange of the floor, while it is being pulled up when the circuit arrangement is propelled.

According to a further embodiment of the invention, the formwork walls have a steering section at the front end which is mounted so as to be pivotable about an approximately vertical axis. When advancing the formwork arrangement according to the invention, a change in direction can be given, so that it is ensured that the formwork arrangement moves along the predetermined distance during the advance. It is understood that the steering sections must be lockable in the angular position assumed so that no undesirable changes in direction occur.

If no precautions are taken, there is a risk that the formwork arrangement during its advance Depth changes, which means that it may move to a greater depth or a smaller depth. In order to remedy this disadvantage, an embodiment of the invention provides that the formwork walls are connected at the front upper end via a vertical skid which has an approximately triangular cross section in the front part with a forwardly pointing tip and obliquely downwardly directed sides which also face can be convexly curved at the bottom. Such a skid guarantees approximately the same height when propelling the formwork arrangement. Since this should also be movable at different heights, the formwork walls can have a plurality of vertically spaced fastening points for the height skids.

There may be a need to temporarily lift the formwork assembly and move it in the raised state. Therefore, an embodiment of the invention provides that legs are pivotally mounted about a horizontal axis in the upper region at the front and rear ends of the formwork arrangement, which have plate-like feet at the free end or are connected to one another by such feet, and the legs are made from a hydraulic adjusting cylinder approximately horizontal position to a vertical position and vice versa. The legs form stilts with which the formwork arrangement according to the invention can be raised. In the raised state, the formwork arrangement can be moved forward by suitable traction means, the feet of the legs then expediently being designed as runners. It is also possible to achieve a forward movement by walking with the help of the legs and an additional height-adjustable skid attached to the pressure plate. When walking, the legs and the runner of the pressure plate alternately engage with the ground, and when the runner engages the runner on the pressure plate, the formwork arrangement can be advanced in the manner described with the aid of the hydraulic cylinders articulated on the pressure plate.

In a further embodiment of the invention, a roadway for an excavator or the like is provided on the top of the formwork arrangement. The excavator can be moved with the advance of the formwork arrangement. It can be used to carry out the appropriate excavation in the area of the formwork arrangement and to fill the excavated spaces again. It can also be used for compaction purposes, especially if a compaction tool is attached to the excavator bucket.

In addition to the lanes, a conveyor belt can also be used the formwork arrangement to be arranged to transport material from the rear to the front end and vice versa.

In another embodiment of the invention, a box-like container is arranged in the middle area of the formwork arrangement and can be tilted backwards about a horizontal axis. The box-like container can serve as a storage container or buffer, for example in the described case that sword-like sections extend the excavation area downwards, the material stored in the box-like container then being used to fill up the lower region. The box-like container is also raised or lowered using a hydraulic cylinder.

Finally, according to a further embodiment of the invention, a built-in box or the like can be attached to the rear of the formwork arrangement, which box may be provided with leveling means. For example, when working on the formwork arrangement according to the invention in railway construction with the aid of the installation box, the formation protection layer and the frost protection layer can be installed with the advance of the formwork arrangement.

Fig. 1

zeigt schematische eine Vorrichtung in Draufsicht in vier Arbeitsstadien zur Erläuterung des Verfahrens nach der Erfindung.

Fig. 2

zeigt eine Draufsicht auf eine detaillierter dargestellte Vorrichtung zur Durchführung des Verfahrens nach der Erfindung.

Fig. 3

zeigt eine Seitenansicht der Vorrichtung nach Fig. 2.

Fig. 4

zeigt einen Schnitt durch die Darstellung nach Fig. 2 entlang der Linie 4-4.

Fig. 5

zeigt die Seitenansicht einer weiteren Ausführungsform einer Vorrichtung zur Durchführung des Verfahrens nach der Erfindung.

Fig. 6

zeigt die Draufsicht auf die Vorrichtung nach Fig. 5.

Fig. 7

zeigt die Seitenansicht der Vorrichtung nach Fig. 5 in Richtung Pfeil 7.

Fig. 8

zeigt die Seitenansicht einer dritten Ausführungsform einer Vorrichtung zur Durchführung des Verfahrens nach der Erfindung.

Fig. 9

zeigt die Draufsicht auf die Vorrichtung nach Fig. 8.

Fig. 10

zeigt die Seitenansicht einer vierten Ausführungsform einer Vorrichtung zur Durchführung des Verfahrens nach der Erfindung.

Fig. 11

zeigt die Draufsicht auf die Vorrichtung nach Fig. 10.

Fig. 12

zeigt die Rückansicht der Vorrichtung nach Fig. 10 in Richtung Pfeil i2.

Fig. 13

zeigt die Seitenansicht einer fünften Ausführungsform einer Vorrichtung zur Durchführung des Verfahrens nach der Erfindung im Betriebszustand.

Fig. 14

zeigt die Draufsicht auf die Vorrichtung nach Fig. 13.

Fig. 15

zeigt die Rückansicht der Vorrichtung nach Fig. 13 zwischen zwei Eisenbahnstrecken.

The invention is described below with reference to drawings explained in more detail.

Fig. 1

shows schematically a device in plan view in four working stages to explain the method according to the invention.

Fig. 2

shows a plan view of a device shown in more detail for performing the method according to the invention.

Fig. 3

shows a side view of the device of FIG. 2nd

Fig. 4

shows a section through the representation of FIG. 2 along the line 4-4.

Fig. 5

shows the side view of another embodiment of an apparatus for performing the method according to the invention.

Fig. 6

shows the top view of the device according to FIG. 5.

Fig. 7

shows the side view of the device of FIG. 5 in the direction of arrow 7.

Fig. 8

shows the side view of a third embodiment of an apparatus for performing the method according to the invention.

Fig. 9

shows the top view of the device according to FIG. 8.

Fig. 10

shows the side view of a fourth embodiment of an apparatus for performing the method according to the invention.

Fig. 11

shows the top view of the device according to FIG. 10.

Fig. 12

shows the rear view of the device of FIG. 10 in the direction of arrow i2.

Fig. 13

shows the side view of a fifth embodiment of an apparatus for performing the method according to the invention in the operating state.

Fig. 14

shows the top view of the device according to FIG. 13.

Fig. 15

shows the rear view of the device of FIG. 13 between two railway lines.

A shoring box 10 has two side walls 12, 14 which run parallel and at a distance from one another. As can be seen from FIG. 4, the walls 12, 14 are in the front area double-walled. They can also be stiffened (not shown) to give them high stability. The lower edge of the walls 12, 14 is formed by double-T profiles 16, 18, and on the top of the walls 12, 14 are arranged double T-profiles 20, 22, which are arranged over four crossbeams 24, 26, 28 and 30 are connected at a distance. Between the walls 12, 14 perpendicular to these, a plate-shaped abutment 32 is arranged in the form of a pressure plate, to which two adjusting cylinders 34, 36 and 36 are articulated near the walls 12, 14 via the piston rod. The cylinders themselves are articulated at 42, 44 and 46, 48 on the inside of the walls 12, 14 by means of brackets. In this way, the side walls 12, 14, on the one hand, and the pressure plate, on the other hand, can assume different relative positions, as indicated by dashed lines in FIG. 3. The maximum relative positions are predetermined by the maximum stroke of the adjusting cylinders 34 to 40.

As can be seen from FIG. 2, the walls 12, 14 run to the right into a cutting edge 50, 52. in Fig. 1 it is assumed that a shoring box 10 of the type described is inserted in a previously excavated excavation pit. This is shown at a in Fig. 1. The walls 12, 14 can protrude slightly above the floor surface. The Pressure plate 32 is located approximately in the middle between the walls 12, 14, ie the adjusting cylinders 34 to 40 are retracted to a minimum length. Accordingly, there is an empty space on both sides of the pressure plate 32. The rear area behind the pressure plate 32 is then filled with new soil material (with regard to the direction of advance to be described according to arrow 70), which may also be compacted. This is shown in Fig. 1b. Then the adjustment cylinders are extended. Since the pressure plate 32 is supported on the floor behind it, the walls 12, 14 move forward in the direction of arrow 70, so that now the front area between the formwork walls 12, 14 is filled with floor and the area behind it is empty. This can be seen in Fig. 1c. The printing plate 32 is then returned to the starting position, as can be seen in FIG. 1d. This results in an empty space behind the pressure plate 32, which in turn can be filled with new floor material. The area in front of the pressure plate 32 is full and can therefore be emptied (FIG. 1d). Before a further advance of the walls 12, 14 takes place in the working position FIG. 1d, the area behind the pressure plate 32 is first refilled with fresh soil material. Filling with and removing Soil material can be made simultaneously or one after the other, depending on the possibilities and the rational way of working.

The crossbeams 24 to 30 and / or the pressure plate 32 can be made adjustable in length in order to change the distance between the formwork walls 12, 14 to match the construction site.

As can be seen from FIG. 1, the rear part of the formwork walls 12, 14 can form a shoulder with the front part, into which the pressure plate 32 can protrude, so that the pressure plate 32 can be made up after the formwork walls 12, 14 have been lifted (FIG. 1c and d) can be done without problems.

Laying means can be attached to the device 10 at a suitable point in order to lay a material at the same time as the box is being driven, for example a geotextile mat, drainage pipes or the like.

FIGS. 5 to 7 show a formwork arrangement 10a with the formwork walls 12a, 14a. As can be seen, one is made up of three hydraulic cylinders on each side Existing hydraulic unit 60 is in turn coupled to the formwork walls 12a, 14a, front sections 62, 64 being connected in an articulated manner to the rear sections of the formwork walls 12a, 14a via joints 66, 68, the joint axis running vertically. As a result, the sections 62, 64 can be pivoted in order to change the direction of advance of the arrangement 10a. To achieve better stability, the sections 62, 64 are firmly connected to one another at the rear via a continuous wall 70.

As can be seen from FIGS. 5 and 6, the sections 62, 64 are connected to one another at the front upper end via a transverse runner 72. It is triangular in cross-section at the front end with a convexly downwardly extending side 74. From FIG. 6 it can be seen that the runner 72 consists of two sections 76, 78. Section 76 defines the minimum width of the arrangement 10a, while section 78 corresponds to a grid length, over which the width can be increased in each case. As can be seen, the front edge of the sections 62, 64 is provided with a trapezoidal part 80 which has a sharpened edge which extends to the underside of the sections 62, 64. In the lower area below the runner 72 is a further cross runner 82 is provided which connects the formwork wall sections 62, 64 to one another. The runners 72, 82 allow a relatively precise height control when propelling the formwork arrangement 10a. As shown at 84, various attachment points are provided for the upper runner 72 so that the arrangement 10a can be moved to different heights.

As is also apparent from FIG. 5, sword sections 86 shown in broken lines are provided, which can be extended downward in order to increase the depth of the formwork walls 12a, 14a in this area. This makes it possible to replace the soil at a greater depth. However, the sword sections 68 are pulled up during the advance so that they do not impair the advance. Two raceways 88, 90, which receive and guide the crawler tracks of an excavator 92, are arranged on the crossbars of the arrangement 10a connecting the formwork walls 12a, 14a. The excavator can, for example, refill empty spaces during operation of the arrangement 10a, carry out excavation work or also carry out compaction work. In the illustrated embodiment, a vibrator 94 is attached to the arm of the excavator 92.

As can be seen, it is sufficient between the lanes 88, 90 Space to place a conveyor belt (not shown) and run it below the excavator to transport material from front to back or from back to front on formwork assembly 10a.

In the formwork arrangement 10b according to FIGS. 8 and 9, legs 100, 102 are pivotally mounted about the axis 96 between the formwork walls 12b, 14b, as indicated by dash-dotted lines in FIG. 8. A skid-like foot 104 is articulated to the legs 100, 102, the width of which corresponds to the width between the formwork walls 12b, 14b. It is articulated on the free ends of the legs 100, 102 in such a way that it always lies in a horizontal plane, it having a cross section similar to that of the transverse runners 72 of the embodiment according to FIGS. 5 and 7. At the projecting end of the legs 100, 102 engages an adjustment cylinder 106 in order to adjust the legs 100, 102 from the horizontal position drawn in solid lines to a vertical position (drawn in broken lines). Analogously, an arrangement of two legs 106, 108 is pivotally mounted about the axis 110 in the rear area, which pivotally supports a skid-like foot 112 between them at the free end, which is also always directed horizontally with a similar cross-sectional profile as the foot 104. The legs as well 106, 108 can with the help of a not shown Adjusting cylinders from the horizontal position (indicated by solid lines in Fig. 8) to the vertical position (shown in dash-dotted lines) and vice versa. With the aid of the legs 100, 102, 106, 108, the arrangement 10b can be raised, as shown in FIG. 8. In this position, for example, it can be slid forward using a suitable pulling device. However, it is also possible to provide a walking movement using the legs if a skid 116 is attached to the rear of the pressure plate 32b using an adjusting cylinder 114. By supporting the skid base 116, the legs 100, 102, 106, 108 can be pivoted into a middle position (also shown in dash-dotted lines) in order to then be pivoted into the vertical position with the help of the pressure plate 32 b.

The skid-like foot 104, like the cross skid 72 in the embodiment according to FIGS. 5 to 7, allows the formwork arrangement 10b to be adjusted in the horizontal position of the legs, which is further supported by the rear skid-like foot formation 112.

The formwork arrangement 10c is not dealt with in detail, since it is approximately that of the preceding figures equal. It should only be pointed out that the front section of the formwork walls are connected to one another via a continuous wall 116, on which the hydraulic arrangement 60 engages. The special feature of the arrangement according to FIGS. 10 to 12 is that a tilting container 120 is arranged on the top of the arrangement 10c. As can be seen, it is articulated at 122 and loosely supported at 124. It serves to hold soil material, as shown at 126, which can be poured into the rear area of the formwork arrangement 10c by lifting the tilting container 120. It does not seem necessary to go into the details of the formation of the tilting container 120 in more detail.

The formwork arrangement 10d according to FIGS. 13 to 15 is similar to the formwork arrangement 10a according to FIGS. 5 to 7, so that these need not be discussed in more detail. As can be seen, the formwork arrangement 10d is shown in the lowered operating position. It moves in the direction of arrow 70. As can be seen from FIG. 15, this takes place between two train tracks 130, 132, between which a floor exchange is to be carried out. For example, the floor is being renovated between the railway tracks 130, 132. As can be seen, the track body for the tracks 130, 132 has a ballast bed 134, 136 and a double layer 138, 140 from a formation protection layer and a frost protection layer, which rest on a substructure 142. On the rear side of the formwork arrangement 10d, an installation box 144 can be seen, which is attached to the formwork arrangement 10d at 146. With the aid of the installation box 144, with the advance of the formwork arrangement 10d, which carries out a soil exchange for the substructure 142, a formation and frost protection layer can be installed at the same time.

As can be seen from FIGS. 13 and 14, leveling means 148 are provided in the box 144 in order to produce a desired flat surface with the aid of the box 144 when this is advanced together with the formwork arrangement 10d.

Claims (22)

1. A method for replacing soil, especially next to roads and buildings, characterized by the following method steps:

   a) inserting a shoring assembly consisting of a pair of parallel vertical shoring walls spaced by at least one cross-member into the earth by raming and/or in an excavated pitch next the road, the space between the shoring walls which is open rearwards and forwards with respect to the working direction being divided into leading and trailing areas by a thrust plate displaceable between the shoring walls by jacks;

   b) removing the soil in the leading area;

   c) horizontally advancing the shoring walls in the earth in the working direction next to the road by supporting the thrust plate against the soil therebehind;

   d) advancing the thrust plate to the soil in the leading area, with the thrust plate being approximately in the central area with respect to the longitudinal direction;

   e) filling the now empty trailing area between the shoring walls with fresh soil and removing the soil in the leading area between the advanced shoring walls simultaneously or thereafter; and

   f) repeating the steps b) to e).
2. A device for replacing soil, especially next to roads and buildings for performing the method of claim 1, comprising

   a shoring assembly consisting only of a pair of parallel, spaced, vertical shoring walls (12,14) and

   a plate-like abutment member (32) extending transversely between the shoring walls (12,14) and limiting a channel-like area between the shoring walls (12,14) which is open in forward and rearward directions, whereby those portions of the channel-like area which are ahead and behind of the plate-like abutment member between the shoring walls (12,14) may be cleared off or filled by soil,

   at least one jack (34,36,38,40) being disposed only on the leading side of the plate-like abutment member (32) in this marginal area and the latter being connected to the leading internal area of the associated shoring wall,

   at least one cross-member (24,26,28,30) fixedly connecting the shoring walls (12,14) in their upper areas to each other and means being provided at the device for mounting a device for laying geotextile mats, drainage pipes or the like.
3. The device according to claim 2 for performing the method of claim 1, characterized in that the shoring walls (12,14) in their leading areas are double-walled and provided with internal stiffening means.
4. The device according to claim 2 for performing the method of claim 1, characterized in that the upper edges of the shoring walls (12,14) are comprised of profiled beams (20,22).
5. The device according to claim 2 for performing the method of claim 1, characterized in that the leading vertical edges (50,52) of the shoring walls (12,14) are formed as cutting edges.
6. The device according to claim 2 for performing the method of claim 1, characterized in that the cross-member (24,26,28,30) and, respectively, the plate-like abutment member (32) are adjustable in length.
7. The device according to claim 6, characterized in that the thrust plate and/or the cross-member are comprised of vertically divided units of predetermined length.
8. The device according to claim 2 for performing the method of claim 1, characterized in that a sword-shaped portion (86) engages the shoring walls (12a,14a) in the leading areas so as to be downwardly extensible.
9. The device according to claim 8, characterized in that at least one hydraulic jack engages the sword-shaped portions (86) for adjusting the height thereof.
10. The device according to claim 2 for performing the method of claim 1, characterized in that top portions for the shoring walls and, if desired, for the thrust plate are provided so as to extend the shoring assembly upwards.
11. The device according to claim 2 for performing the method of claim 1, characterized in that a leading portion (82,84) of the shoring walls (12a, 14a) is mounted so as to be pivotal about a vertical axis and a steering device for said portions is provided.
12. The device according to claim 2 for performing the method of claim 1, characterized in that the shoring walls (12a, 14a) are connected at their leading upper ends via a height-rail (72) which is of approximately triangular cross-section at its leading portion and has a forwardly directed tip and downwards tapering side (74).
13. The device according to claim 12, characterized in that the downwards tapering side (74) is of downwards convex arcuate shape.
14. The device of claim 12 or claim 13, characterized in that the shoring walls (12a, 14a) include a plurality if vertically spaced mounting points (75) for said height-rail (72).
15. The device according to claim 2 for performing the method of claim 1, characterized in that legs (100,102,106,108) are mounted to the leading and trailing ends of the shoring assembly (10b) in the upper area so as to be pivotal about a horizontal axis (96,110), the legs having at their free ends plate-like shoes (104,112) and being pivotal by means of hydraulic jacks from a substantially horizontal position into a vertical position, and vice versa.
16. The device according to claim 15, characterized in that the shoes (104,112) are mounted to the legs (100,102,106,108) so as to be pivotal about a horizontal axis.
17. The device according to claim 15 or claim 16, characterized in that at least one rail (116) adjustable in height by a hydraulic jack (114) is mounted to the thrust plate (32b).
18. The device according to claim 2 for performing the method of claim 1, characterized in that the upper side of the shoring assembly (10a, 10d) has a road way (88,90) for an excavator (92) or the like.
19. The device according to claim 18, characterized in that a conveyor band is positioned on the top of the shoring assembly between the road ways (88,90) or laterally thereof.
20. The device according to claim 2 for performing the method of claim 1, characterized in that a box-like container (120) is disposed in the central area of the shoring assembly (10c) thereupon, which container is arranged to be pivoted rearwards about a horizontal axis (112).
21. The device according to claim 20, characterized in that the container (120) is arranged to be raised by at least one lifting jack on the side opposite to the mounting point.
22. The device according to claim 2 for performing the method of claim 1, characterized in that an assembly box (144) is arranged to be suspended from the trailing side of the shoring assembly (10d) and is provided with levelling means (148).

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