EP2631370A2 - Underfloor shaft - Google Patents

Abstract

The underfloor panel shaft (1) has main structure (2) that includes upper, horizontally encircling frame (4), plastic bottom plate (5), and plastic wall plates (8). Each wall plate has cable passage formed between two superimposed wall strips (8a,8b) which are fixed against each other. The breaking plates are sealed to longitudinal edges of wall strips, which are opened towards cable passage depressions (13). An independent claim is included for kit for manufacturing of main structure of underfloor shaft.

Description

I. Field of application

The invention relates to a usually arranged at ground level in the underground underfloor shaft, as it is required to lead underground cables in the subfloor shaft laterally in and out and usually in the underfloor shaft connecting the incoming and outgoing cables and against external moisture by means of a sleeve , usually a potting sleeve, seal.

II. Technical background

Such underfloor shaft has a trough-shaped main body, which is embedded in the ground and ends with its upper edge approximately flush with the earth's surface, and in which the cable connections are housed. The entire top of the main body forming opening is closed by an attached solid lid, which is usually made of metal.

The trough-shaped main body, however, currently usually consists mostly of concrete or sometimes metal, such as cast iron, and is usually made in one piece.

The problem is to introduce the underground cables already laid underground, which consequently terminate freely in a provisionally created excavation of the ground, into the main body by means of corresponding cable passages in its walls.

Since these underground cables are often relatively thick and thus rigid, they can not simply bend with their free ends so far that they could easily be inserted through the cable passage recesses of such a trough-shaped main body and this could then be lowered into the excavation into it, especially the underground cables usually protrude from different directions in the excavation.

The more rigid the underground cables are, the larger the excavation must be made to accomplish this with the main body.

Another problem is that at almost every job site, the number and also the diameter of the existing underground cables that must be led into the underfloor shaft is different. In order not to have to provide too many variants of the main body of an integrally manufactured main body, there are relatively many cable passage recesses in terms of number and diversity of diameter present. However, this leads to the fact that the unused cable passage recesses must be sufficiently sealed.

Although the underfloor shaft should not be completely waterproof in order to drain seepage water that has penetrated downwards, however, there must be sufficient impermeability to the penetration of the soil and large quantities of water, especially in the upper area.

III. Presentation of the invention a) Technical task

It is therefore an object of the invention to provide an underfloor shaft and a kit for its production and a method for installing the underfloor shaft available, which offers over the previously used underfloor shafts advantages in the production and handling.

b) Solution of the task

This object is solved by the features of claims 1, 10 and 14. Advantageous embodiments will be apparent from the dependent claims.

Since the trough-shaped main body of this underfloor shaft is composed of several parts, it can be assembled from these items only in the excavation in the ground, which has significant advantages in that the items much easier inserted into the excavation and under the in the excavation into it above ground cable can be introduced.

By the fact that the items are finned plastic parts - except stiffeners, which are made of metal - they are relatively light and easy to handle well in the excavation and unfavorable posture, which, given the fact that such a sub-shaft considered in the supervision quite a size 0.8 x 1.5 m, is a significant advantage. Correspondingly large concrete parts could only be moved with a lifting device, while individual wall parts or the posts made of plastic can be moved and used by hand.

By inwardly facing ribbing the bottom parts and wall parts have a smooth outer surface, so that when installed the soil can not later slip into the open recesses between outwardly facing ribs, which regularly has a lowering of the surface around the shaft around, and can get caught in depressions of the underfloor shaft, which makes subsequent removal and removal much more difficult.

Above all, however, the wall strips with their semicircular cable passage recesses facilitate the creation of the cable passages:

On the one hand, the wall plates in the form of the paired wall strips are arranged at the location with respect to the circumference and height of the main body, where they are actually required due to the exit point of the underground cables, so that further excavation, bending and the like of the underground cables is substantially avoided: Because preferably the entire walls of the main body consist exclusively of wall panels in which passage openings for cables can be opened when needed.

Since the wall strips have semicircular through openings - after knocking out the break plate from the corresponding cable passage recess which breaks clean along a semicircular break point - and always two wall strips from above and below against the ground cable mirror image must be placed against each other to create round cable passages can these are applied to the underground cables without threading the free ends of the cables through closed, round through openings.

In practice, the structure of the main body from bottom to top is completed, so first placed the bottom plate on the bottom of the excavation and possibly leveled, preferably already before the lower Frame placed on top of the bottom plate and was firmly connected to this.

Subsequently, the single wall panels are placed on the frame and connected by rotary latch with the underlying each while connecting the same height wall panels in the corner by vertical telescoping Eckverbindungsausbildung together.

The wall panels are previously formed from two mirror images of each other, so upper and lower, wall strip formed and clamped by means of clamping screws against each other.

Insofar as one of the wall panels has to be passed through from the side, grounding cables are first cut out of the wall strips of this wall panel at the points where a cable is to be passed through the cable openings, and the breakaway plates are cut out of the cable passage recesses, and only then then brought the two wall strips of this wall plate from the top and bottom of the underground cables, positioned on the already mounted underlying wall panels and then only one hand by means of the clamping screws the two wall strips of this wall plate braced against each other and on the other hand this wall plate in the corner areas with the adjacent, on the same High-lying wall panels connected.

In order to prevent abrasion of the jacket of the cable at the through-openings and to prevent the ingress of dirt into the main body, a seal, for example made of an elastic material, for example a foam, is inserted between the cable and the passage opening, preferably inserted in the longitudinal direction of the cable.

In the floor slabs, it has proven to be advantageous that this only downwardly open ribs and between a - closed except for a few water drain holes - plate, then then by means of the downward ribs by pushing back and forth a leveling and deliberate digging in the Ground of the excavation can be made. On the top, a flat surface may be present.

In this way, the walls of the main body are built up to the last uppermost wall parts. Then the upper frame is placed, which in turn is fixed by means of appropriate rotary latch to the underlying wall panels.

The successive parts such as wall panels and frames are preferably secured against slipping transversely to its main plane, preferably by partially vertically interlocking.

If the height to the upper end of the upper frame turns out to be too low, as a leveling between the top wall panels and the upper frame still a balance frame can be mounted in the same way.

The frames are preferably considered in two parts when viewed from above and consist of two U-shaped frame parts in order to make them easier to transport and above all to be able to produce with different lengths of free legs of the frame parts in an injection mold frame for different sizes of shafts.

The gap between the frame parts should be as far as possible from the joint between the bottom plates and not at the same point of the circumference. The advantage of this wall structure is the ease of installation due to function separations.

By shortening the injection mold for the wall strips also shorter wall plates can be produced.

The connection in the corner area is made by having a variety of wall panels, e.g. extending in the longitudinal direction of the underfloor shaft wall panels, extending beyond the corner region and laterally in the end region have a connection device, which preferably consists in that on one wall plate vertically extending, undercut grooves are present, and the other wall plate to be connected thereto as Tongue has matching projections, which can be designed preferably also conical in the vertical insertion direction.

The rotary bars are preferably not directly in the corner area, but offset from this, because directly in the corner area are vertically all wall panels flush penetrating through holes available, which are used for insertion of stiffening tubes, e.g. made of metal, and then pass through the walls of the underfloor shaft from the top frame to the lower frame.

In the wall strips are usually semicircular, up or down open, cable passage depressions for the same ever the same cable diameter available, which are initially all closed by frangible plates, but there are optional wall strips for different cable diameters and if necessary, wall strips can be created , in which openings for different cable diameters are present side by side, depending on the circumstances at the installation site.

If cable entry openings are not required, these breakage plates will not be removed.

For the height of the wall panels there is a grid, which is given by the height of the wall panels for the smallest cable diameter. All other wall panels have a height equal to this height or an integer multiple thereof.

Of course, the wall panels can all be the same height - which is the preferred solution - namely the same high wall panels, but with different sized cable passages in it.

First, the transverse displacement of stacked wall parts is prevented by the stiffening tubes in the vertical through holes, which are preferably housed in the corner.

On the other hand, the stability of the entire main body over the height of its walls is not ensured by a single, continuous over the entire height tie rods or the like, because then this tie rod and thus the stability of the main body could be made only when the entire main body is constructed.

Due to the layer-by-layer locking of wall parts on the respectively underlying wall parts as well as mutually at the same height by the connecting device, the main body is already very stable in each phase of the structure. The stiffening tubes can also be used at the beginning or during the growth of the walls and then used as guide tubes for the newly aufzusetzenden wall parts.

Additional stability is given to the main body by reinforcements made of flat material such as metal, which is preferably placed when creating each wall plate, for example, the top of the upper wall bar before the clamping screws are used to screw these against the lower wall bar of the wall plate. Of course, then these flat iron also need through holes through which the next coming from above rotary latch as well as the clamping screws can pass through them in the lower wall plate.

In order not to let the bottom plate on the one hand too heavy and on the other hand to be able to bring well into the excavation, which is usually to be able to bring under it protruding underground cables, the bottom plate is preferably divided, for example, halved in the longitudinal center, or even stronger divided so that the items are easy to handle and insertable.

The items of the bottom plate are either plugged together or preferably connected to each other by means of the lower frame screwed thereon.

kit:

It is obvious that the creation of the main body from individual parts by means of one and the same items also different sized main body can be created:

First of all, the height of the main body can be varied, depending on the number of superimposed wall parts.

If, on the other hand, one wishes to produce the main body with a different base area in the plan view, different types of wall strips and floor plates, namely with different lengths, are required and frame parts of different sizes, for example U-shaped frame parts with different lengths of free legs.

Furthermore, different types of wall strips may be present with regard to the height of their cable passage recesses.

For each planned height of a subfloor shaft, a variety of stiffening tubes of the appropriate length must also be available.

Furthermore, the kit includes - optionally or in the basic equipment - clamping screws to screw each two wall strips to a wall plate vertically against each other and / or screw the corresponding flat metal strips for interposing between two wall panels that serve the additional stiffening.

Further, the kit may include a lower frame and / or a height compensation frame.

Assembly procedure:

The main advantage of the prepared from these items main body is in the ease of installation, because in an excavation in the ground, projecting into the side of earth cables into creating such a main body, this should be possible as quickly as possible, with little effort and possible without auxiliary tools , When replacing an old shaft this should also be possible without loosening the cable connection housed in the shaft.

1. a) Befestigen des unteren Rahmens an der Bodenplatte,
2. b) Einlegen der Bodenplatte in die Ausschachtung und ggf. unter die dort seitlich mündenden Erdkabel,
3. c) Aufsetzen einer Lage von Wandplatten ohne entfernte Sollbruchplatten in den Bereichen, in denen keine Erdkabel münden,
4. d) falls auf dieser Höhe Erdkabel münden, Anlegen eines Paares der Wandleisten mit den durch Entfernen der Sollbruchplatten geöffneten, halbrunden Kabeldurchgangsvertiefungen von oben und unten gegen die mündenden Erdkabel,
5. e) Verschrauben der beiden Wandleisten mittels vertikal durch das Paar hindurch geschraubter Spannschrauben zu einer Wandplatte,
6. f) Verbinden der auf gleicher Höhe liegenden Wandplatten in den Eckbereich miteinander,
7. g) Aufsetzen weiterer Lagen von Wandplatten gemäß der Punkte c) bis f),
8. h) Verriegeln jeder neuen aufgesetzten Wandplatte mit der darunter liegenden Wandplatte, insbesondere durch Einsetzen und Drehen eines Drehriegels,
9. i) Aufsetzen des oberen Rahmens auf den oberen Rand der obersten Wandplatten,
10. j) vertikales Einschieben von Versteifungsrohren in die Eckbereiche der Wände des Hauptkörpers von oben über dessen gesamte Höhe.

A method for installing the main body of a subterranean shaft in a ground excavation, in which earth cables open, comprises the following steps as a minimum:

1. a) attaching the lower frame to the bottom plate,
2. b) inserting the floor slab into the excavation and, if necessary, under the underground cables opening there laterally,
3. c) placing a layer of wall panels without removed breakage plates in the areas where no underground cables open,
4. d) if at this level earth cables open, applying a pair of wall strips with the open by removing the predetermined breaking plates, semicircular cable passage recesses from above and below against the outgoing earth cable,
5. e) screwing the two wall strips by means of vertically screwed through the pair through clamping screws to a wall plate,
6. f) connecting the wall panels lying at the same height in the corner area,
7. g) placing further layers of wall panels according to points c) to f),
8. h) locking each new patch wall plate with the underlying wall plate, in particular by inserting and rotating a rotary latch,
9. i) placing the upper frame on the upper edge of the uppermost wall panels,
10. j) vertical insertion of stiffening tubes in the corner regions of the walls of the main body from above over its entire height.

Thus, first the bottom plate or the part bottom plates are placed on the bottom of the excavation, leveled there and brought to the correct height by appropriate underfilling, preferably after attaching the lower frame on top of the bottom plate. The individual part of the bottom plates are then fixed against each other, for example, locked and / or put on, the joints cross-bottom frame, which is screwed into the Teilbodenplatten.

Then the walls are built layer by layer up, so each one layer of wall panels circumferentially around the entire circumference with the underlying elements - be it the lower frame or the underlying wall plate, connected and at the same time lying on a height level wall panels in the Corner regions by means of the connecting device positively against each other.

If no cable has to be passed through the corresponding wall plate, the cable passage openings of this wall plate remain closed and the two wall strips of this wall plate can be screwed against each other with mutually facing cable passage depressions, ie with upper and lower wall bar, preferably below Insert a stiffening metal strip between the screw heads and the wall plate before inserting the clamping screws. This is done before installing the wall plate in the main body.

Only when a cable has to be performed by the corresponding wall plate, the predetermined breaking plates of the corresponding cable passages are first removed in the wall strips and thus opened the cable passage opening, and only then the two wall strips, one from below and one from above, against the corresponding one or more Ground cable laid and the two wall strips then - as described above - fixed against each other at the appropriate location in the wall of the main body. Each new layer patch wall plates is positively locked with the underlying wall panels on top of inserted rotary latch, which extend through the newly patched wall plate and into the underlying wall plate.

The countersunk in the upper wall plate heads of the rotary latch serve simultaneously as a locking element for the next brought up from above lower end of the next rotary latch located above.

After all wall panels are set in the required amount and height on top of each other, the upper frame, possibly previously a compensation frame for the additional height, placed on top and in turn locked by means of turning bars against the underlying elements in height.

The stiffening tubes in the through holes in the corner areas are either inserted only at the end of the structure of the main body, but can also be used before and then serve as a guide for the next from above aufzuschiebenden wall panels, if it is no longer such with open cable passages for underground cables, because these must be the bottom wall strip be set from below, which is no longer possible with existing upstanding stiffening tubes.

In this way, a main body is created, which is not completely waterproof, but is sufficiently tight at least against penetrating soil and dirt and water still allows the drainage of infiltrated leachate through the ever-present residual gaps between the assembled components through to the outside.

Subsequently, in the thus created and stabilized main body, the connection of the underground cables through sleeves, etc. are made and then the upper opening of the main body are closed by an attached lid.

c) embodiments

Fig. 1a:

den fertig montierten Hauptkörper des Unterflurschachtes,

Fig. 1b:

den Hauptkörper in Explosionsdarstellung

Fig. 2a:

eine einzelne Wandplatte in unterschiedlichen Betrachtungsrichtungen,

Fig. 2b:

den vergrößerten Endbereich der Wandplatte von oben,

Fig. 2c:

den Endbereich der Wandplatte von unten,

Fig. 2d:

die Wandplatte in Explosionsdarstellung,

Fig. 3:

den Eckbereich eines teilweise aufgebauten Hauptkörpers,

Fig. 4:

einen Drehriegel und

Fig. 5:

den Eckbereich eines aufgebauten Hauptkörpers in aufgeschnittener Darstellung:

Embodiments according to the invention are described in more detail below by way of example. Show it:

Fig. 1 a:

the fully assembled main body of the underfloor shaft,

Fig 1 b.:

the main body in exploded view

Fig. 2 a:

a single wall plate in different viewing directions,

Figure 2 b.:

the enlarged end area of the wall panel from above,

Figure 2 c.:

the end area of the wall plate from below,

Fig. 2 d:

the wall plate in exploded view,

3 :

the corner region of a partially constructed main body,

4 :

a rotary latch and

Fig. 5 :

the corner region of a built-up main body in a cutaway view:

The FIGS. 1a and 1b show the underfloor shaft 1 without the cover which normally closes the open top of the main body 2 shown in operation.

Also, on the main body 2, near the inner edge, plugged four strip-shaped formworks 3 are used only for casting a concrete upper end outside of the formwork 3 around. Thereafter, the formwork 3 is removed and reused and is therefore no longer present at the finished, in-service underground shaft. How best the exploded view of the Fig. 1b can recognize, the main body 2 is rectangular in plan view and consists - from bottom to top - of a bottom of the main body 2 forming the bottom plate 5 and along the edge region closed rectangular peripheral wall parts 6, which are set one above the other, starting with the lower frame 14, then wall parts, each consisting of the length and the width of the circumference forming wall panels 7 , which in turn consist of a respective lower and an upper wall bar 8 a, b and an upper frame 4 placed on the uppermost wall panels 7 are the frame 4, 14 and / or the bottom plate 5 each divided in half.

In the FIGS. 2a to 2d is shown in each case a single wall plate 7 and their cohesion, which is best from the exploded view of Fig. 2 d lets recognize:

Each wall plate 7 consists of two identical or almost identical wall strips 8 a, b, which are arranged mirror-symmetrically to their contact surface. In the longitudinal direction 10 of the wall strips these have juxtaposed and in the longitudinal direction 10 of the wall strips 8 a, b spaced in each case semicircular cable passage recesses 13 which are open to the contact plane of the wall strips 8 a, b. In addition, these cable passage recesses 13 are closed by predetermined breaking plates 28 made of thin material and in particular close to the outside of the wall strips 8 a, b lying.

The wall strips 8 a, b are connected to a wall plate 7 by the wall strips with the open sides of their cable through-holes 13 are placed against each other and by means of clamping screws 15 which vertically and thus transversely to the longitudinal direction of the wall strips 8 a, b through both pass through and secured on the opposite side by means of nuts 26 , screwed against each other.

The wall strips 8 a, b therefore differ at most in terms of the design of their screw 17 at the free end, which may have a torsion-proof recess for inserting the nut 26 at the lower wall bar 8 b.

If one removes one or more of the predetermined breaking plates 28 from the cable passage recesses 13 in a wall strip 8a , and also the predetermined breaking plates of the opposite analogous predetermined breaking recesses 13 of the other, lower wall strip 8b, then through the thus created round free cable passage openings earth cables from outside to inside through them Pass wall plate 7 by the wall strips 8 a, b with the open cable passage recesses 13 from above and below against corresponding Earth cables, which open in the excavation for the subfloor shaft, applies and only then screwed against each other, as described.

In this case, sealing sleeves, not shown, between the underground cables and the surrounding wall panels can be inserted.

Near their end portions, the wall strips 8 a, b also have vertically extending and with respect to the two wall strips 8 a, b mutually aligned through holes 19, in the top of each of which a rotary latch 18 can be used so that it is flush with its upper end face with the upper upper side of the upper wall bar 8a completes or even set back relative to this down.

In this state, the rotary latch protrudes with its lower end - as best in Fig. 2 c to recognize - down from the lower wall bar 8 b out.

This rotary latch 18 are not primarily the connection of the two wall strips 8 a, b with each other, but the attachment of the already assembled wall plate 7 on the underlying wall plate 7, to which the next higher is now placed.

How best the single representation of the rotary latch 18 in Fig. 4 shows, this has at its lower end a transverse knob 18 b, which projects radially in its course over the lower part of the shaft of the rotary latch.

The head of the pivot bolt 18 at the upper end has a slot 18a, which is the mouth of a disk inside undercut space which is dimensioned such that the knobs 18 b of an inserted from above brought up next rotating bolt 18 into the slot 18a and the knob 18b can be rotated in the slot 18a , causing it in the head of the rotary latch 18 is locked and can be pulled out of this only after he has completed the 90 ° rotation in the opposite direction.

Just below the head, which has a round outer periphery, a guide plate 18 c is also arranged round outer diameter, which serves as the head of the lateral guidance of the rotary latch 18 in the upper passage opening 19. Thus, the narrower lower shaft of the rotary latch 18 is guided well in the through hole 19 of the lower wall bar 8b laterally, a guide bush 25 can be inserted into this from below, up to the shoulder 25a.

In this way, two superimposed wall strips 8a, b are connected to a wall plate 7 and connected to the underlying wall plate 7 .

FIG. 3 now shows on the basis of an enlarged view of the corner area only for the lower wall bar 8b of a wall plate, as the connecting device is designed in the corner to connect at the same height wall panels and wall strips in the circumferential direction with each other:

First of all, one of the wall panels, for example here the longitudinally extending wall panel, extends so far in the longitudinal direction that the entire corner area is part of this wall panel and wall strips.

How best Fig. 3 shows, the connecting device consists of an undercut groove 21 and a therein insertable in the vertical direction extension 20, which acts as a sliding block.

In the end region, a part of the connecting device, in this case the groove 20, is incorporated on the side surfaces of the corner area containing wall panels and wall strips, while at the transversely extending wall panels and wall strips, here the wall strip 8b, which is there fitting extension 21 is formed ,

Accordingly, in the corner at the same height adjacent wall panels or wall strips vertically by means of groove 20 and extension 21 are pushed into one another and are thereby positively secured in the circumferential direction against each other. This can be done before or after the assembly of two wall strips 8a, b to a wall plate and before or after fixing superimposed wall plates 7 by means of the rotary latch 18 .

Preferably, in each case a layer of wall plates 7, which results in circumferentially a circumferentially closed wall portion 6 , assembled by means of this connection device and then placed the entire wall portion 6 on the already existing part of the main body 2 and locked by means of the rotary latch 18 thereto.

The FIG. 3 further shows that in the corner area additional through holes are present, which are aligned with each other and go through in the completed wall construction of the main body from top to bottom, as to the bottom plate 5 , in which they are no longer present. In this passage openings - preferably after completion of the main body - from above suitably sized stiffening tubes 23 are inserted, which additionally stabilize the main body 2 , since they are usually made of metal.

The FIG. 5 shows for improved understanding the cut corner portion of a completed main body 2, from which it can be seen how the rotary latch 18 each penetrate a wall plate 7 and anchored in the head of the underlying next rotary latch 18 and latched.

In the same way - only with a shorter rotary bolt - the upper frame 4 is mounted on the top layer of wall panels 7 .

In the lower frame 14 , however, only undercut clearances for receiving the toggle 18b of the first mounted thereon rotary latch 18 are present.

The FIG. 5 further shows that the lower edge of the outer wall of the lower wall bar and the upper frame are bent outwards and thereby overlaps the upper edge of the outer wall of the underlying upper wall bar.

LIST OF REFERENCE NUMBERS

1

Under air shaft

2

main body

3

formwork

4

upper frame

4 a, b

frame part

5

baseplate

6

wall parts

7

wall plate

8 a, b

baseboard

9

Cable outlet

10

Longitudinal direction, longitudinal extent

11

transversely

12

vertical direction

13

Cable passage grooves

14

lower frame

14 a, b

frame part

15

clamping screw

16

Flat material made of steel

17

screw

18

Spagnolet

18 a

deepening

18 b

gag

18 c

guide plate

19

Through openings

20

groove

21

extension

22

sealing sleeve

23

stiffening tube

24

hangable

25

guide bush

25 a

shoulder

26

mother

27

28

Breaking plate

Claims (15)

Underfloor shaft (1 ) comprising a trough-shaped main body (2) and a lid closing the upper opening, the main body (2) comprising an upper, horizontally encircling frame (4), a bottom plate (5), - Wall panels (8), each consisting of two superimposed wall strips (8a, b) with cable passages ( 9) between the wall strips (8a, b),
characterized in that - Bottom plate (5) and wall plates (8) are ribbed plastic parts, - have the wall strips (8a, b) each semicircular, initially all by predetermined breaking plates (22) closed, one of its longitudinal edges open, cable passage recesses (13) and two wall strips (8a, b) are arranged mirror images of each other superimposed, - The wall panels (8) in the corner region of the underfloor shaft (1) are positively fixed against each other and - Each two superposed wall panels (8) are positively fixed against each other. Underfloor shaft (1) according to claim 1,
characterized in that - The adjacent in the corner area wall plates (8) via vertically extending undercut grooves (20) and therein projections (21) are pushed vertically into one another, and / or - Between the bottom plate (5) and the wall plates thereon (8) a lower, horizontally encircling frame (14) is arranged, which is fixed in particular by screws from below through the bottom plate (5) on the bottom plate (5) , and /or - Wall plates arranged one above the other (8) and / or likewise superimposed wall plate (8) and frame (4, 14) via at least two vertically extending rotary latch (18), in particular for locking and unlocking only require a rotation of 90 °, against each other are fixed. Underfloor shaft (1) according to one of the preceding claims,
characterized in that - The upper and the lower frame (4, 14) are formed substantially identical, and / or - The upper and / or the lower frame (4, 14) viewed in the plan view are divided into two and consist of two U-shaped frame parts (4a, b, 14a, b). Underfloor shaft (1) according to one of the preceding claims,
characterized in that - The wall panels (8) and wall strips (8 a , b) have a length corresponding to the considered in the supervision length or width of the underfloor shaft and / or either the wall panels (8) for the longitudinal side or the wall panels (8) for the narrow side of the underfloor shaft (1) extend over the corner region and in the end regions of these wall panels (8) vertically extending passage openings (19) for insertion of stiffening tubes ( 23) are present, which consist in particular of metal. Underfloor shaft (1) according to one of the preceding claims,
characterized in that - The ribbed wall lines ( 8 a , b) carry the ribs on the inside and have a smooth, closed outside, and / or - An upper compensating frame ( 24) is provided as height compensation, which corresponds in shape and construction to the upper frame (4) . Underfloor shaft (1) according to one of the preceding claims,
characterized in that - The upper end frame (4) has smooth, closed surfaces on the top, inside and outside, and the ribbing is open at the bottom, and / or - Each pair of wall strips ( 8 a , b ) are screwed against each other by means of between the cable passage recesses (13) pushed through vertical clamping screws (15) . Underfloor shaft (1) according to one of the preceding claims,
characterized in that - Wall strips ( 8 a , b) with different sized cable passage recesses (13) are present. Underfloor shaft (1) according to one of the preceding claims,
characterized in that - Within a wall bar ( 8 a , b), the size of the cable passage recesses (13) is always the same, and / or - All walls of the main body (2) consist exclusively of wall strips with cable passage recesses (13) , except for the frame (4, 14, 24). Underfloor shaft (1) according to one of the preceding claims,
characterized in that - The bottom plate (5) has a closed flat surface and in particular their ribbing is open at the bottom, and / or - The height of a wall plate (8) an integer single or multiple, in particular a straight integer multiple, the height of the wall plate (8) with the smallest cable passage depressions (13), the so-called height grid has. Kit for producing the main body (2) of a subfloor shaft (1) according to one of the preceding claims,
characterized in that
the kit includes at least one kind of bottom plates (5), at least one sort of upper end frame (4), at least one sort of wall ledges (8a, b) with cable passage depressions (13), - At least one type of locking elements, in particular DrehRiegeln (18). Kit according to claim 10,
characterized in that - The kit includes different types of wall strips (8a, b) , each wall strip (8a, b) each have the same size, in each type of wall strips (8a, b) but different sized, cable passage recesses (13) and / or - The kit includes sealing sleeves (22), in particular C-shaped sealing sleeves. Kit according to claim 10 to 11,
characterized in that - The kit comprises clamping screws (15) for wall plates (8) and / or - The kit includes stiffening tubes (23) of different lengths. Kit according to claim 10 to 11,
characterized in that
the kit comprises a lower frame (14) and / or a balancing frame (24) . Method for installing the main body (2) of a subfloor shaft in a ground excavation, in which earth cables open, with the following steps: a) attaching the lower frame (4) to the bottom plate (5), b) inserting the base plate (5) into the excavation and, if necessary, under the earth cables opening there laterally, c) placing a layer of wall panels (8) without removed breakage plates ( 28) in the areas where no underground cables open, d) if at this level earth cables open, applying a pair of the wall strips (8a, b) with the open by removing the predetermined breaking plates ( 28) , semicircular cable passage recesses (13) from above and below against the outgoing earth cable, e) screwing the two wall strips (8a, b) by means of vertically screwed through the pair through clamping screws (15) to a wall plate (8), f) connecting the wall panels (8) lying at the same height to one another in the corner area, g) placing further layers of wall panels (8) according to points c) to f), h) locking each new patch wall plate (8) with the underlying wall plate (8), in particular by inserting and rotating a rotary latch (18), i) placing the upper frame (4) on the upper edge of the uppermost wall panels (8), j) vertical insertion of stiffening tubes (23) in the corner regions of the walls of the main body (2) from above over its entire height. Method according to one of the preceding method claims, characterized in that - Before or during the introduction of the bottom plate (5) in the excavation a leveling and underfilling of the bottom plate (5) .

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