DE6609772U - COMPONENT FOR THE PRODUCTION OF SLOTTED OR DRILLED PILE WALLS. - Google Patents

Description

Company HEILMANN 4 LITTMANN BAU-AKTIENGESELLSCHAFT Munich, Federal Republic of Germany

Component for the production of slotted or bored pile walls

The innovation concerns a component for the production of slot or bored pile walls for construction pit enclosures, building security and permanent E

Diaphragm walls and bored pile walls are used in ever larger Uofang for the construction of underground structures and for construction pit enclosures. According to prior known technique of the protection walls is in the way the procedure ₅ that used after the completed possibly with the aid of a support liquid excavation of the trench wall slot or drilling the Bohrpfahlloches reinforcement cages in the manufacture and the slit wall and the bored pile then in situ concrete, suitably in the tremie, getting produced. When constructing bored pile walls, the borehole can optionally also be made with casing and, depending on the water conditions, the concrete can be placed using the contractor method or by means of Y-pipes.

This known manufacturing technique is unsatisfactory in several respects. The completed diaphragm wall or bored pile wall is at their exposed after the excavation of the construction pit

Inside unsightly; if the diaphragm or bored pile wall should form a permanent part of the structure, this inner side is not easily suitable and required as a visible surface complex spraying work. Furthermore, the watertightness of such in Grtbetc «t # <shnik hergesfe & Hter Seblifez- or bored pile walls not guaranteed * so that separate sealing layers may have to be applied. Finally, in general, the face of difficult Conditions of placing the concrete doubted the quality of the contractor concrete, so that in many structures this Walls are only permitted as auxiliary structures to enclose the construction pit, in whose protection only the actual construction walls are then allowed must be produced separately.

The innovation thus relates to a component for the production of Slotted or bored pile walls for construction pit enclosures, building security and permanent building walls after the per se known method, in which after the excavation or Drilling of the trench wall slot or the borehole in sections the diaphragm wall or the bored pile wall made of reinforced concrete will. The aim of the innovation is the described, in the conventionally manufactured slotted or bored pile walls given disadvantages reliably avoided and a technically simple production of high quality Schlitzbzw. Bored pile walls are made possible, their pit-side Surface are suitable as visible surfaces without any further processing worth mentioning and those with regard to the general concrete quality and watertightness meet high requirements and especially as permanent structures or structural parts are suitable.

For this purpose, according to the innovation, the construction of the component used for the diaphragm or bored pile wall as a steel

precast concrete or prestressed concrete, which steel parts for static Connection and / or sealing with adjacent prefabricated concrete components and has a cross-section corresponding to the slotted or bored pile wall; in the preparation of leraen uie ane-one another to send precast concrete parts by means of the Steel parts provided for this purpose in the course of excavation connected to one another to form a continuous and sealed wall. According to a preferred embodiment, provision can be made be that the precast reinforced concrete part is lined continuously with wall sheet metal on its inner surface on the pit side when installed whose edges are used for waterproofing and power transmission between adjacent components. After a A further advantageous embodiment can be provided that the precast concrete part in addition to or instead of the lining ■ Steel profile parts for connection to the wall panels on the pit side and / or has sealing between adjacent precast concrete components.

The use of precast concrete parts according to the innovation, which can be produced under factory conditions with high, easily controllable constant concrete quality and perfect dimensional accuracy, ensures that the diaphragm walls produced in this way on the pit side flawless visible surfaces, even in the embodiment without full-surface cladding with wall sheets, and their general quality corresponds to the requirements to be placed on permanent parts of the building. The steel parts embedded in precast concrete parts or provided on them according to the innovation ensure a perfect static and sealing connection of the individual prefabricated concrete parts to a continuous slotted or bored pile wall. The flat lining of the prefabricated parts with wall panels made of steel or combibblecii can be omitted wherever the concrete as such ₃ for the on-

Due to the fact that it is manufactured in a factory, a higher general quality in any case than with the previous in-situ concrete technology is guaranteed, already possesses sufficient watertightness by itself, especially when it is used of pre-stressed concrete parts, in which the concrete is already highly watertight due to the pre-tensioning applied Properties. The connection of the individual prefabricated parts from a static point of view and the butt joint sealing takes place here a with the help of the steel profile parts provided in the prefabricated parts. Of course, the precast concrete parts can according to the innovation have both steel profile parts and sheet metal linings, with the static and gasket-wise Connection of the prefabricated parts to one another both by means of the mandrel plates and also by means of the steel profile parts can be done by means of both.

The overall construction using the components according to An innovation can be a steel composite construction in which the steel cells (wall sheets and / or steel profile parts) of the individual Prefabricated parts are connected to the normal round steel reinforcement of the prefabricated parts.

The shape of the precast reinforced concrete parts according to the innovation can in principle be adapted to the most diverse purposes of the final structure., in addition to sheet pile piles or plates, which probably 'will represent the most common form, for example single or double T-beams, normal beams, cross-sections with recesses, semicircular profiles, etc. in question. For the production of bored pile walls, crescent-shaped pile shapes are recommended, i.e. prefabricated parts, whose cross-sectional profile has convex and concave parts, anifc which the successive piles interlock. However, here too there are the most varied of forms, depending on the form Variation and combination options.

The connection of two abutting precast concrete parts and / or the sealing of the joint can be done by means of connecting plates, which over the joint between two adjoining Placed precast concrete and rait the wall sheets and / or the steel profile parts to be connected to each other Precast concrete parts are connected, in particular welded. Alternatively, the connection and / or seal by means of a protruding part of a wall plate or a steel profile, which is carried out with the wall plate or steel profile part connected to the abutting precast concrete part, in particular welded will.

When using the components according to the innovation for production With the diaphragm or pile walls, the prefabricated parts can either simply be placed on the diaphragm wall base; alternatively can In order to achieve a secure integration of the precast concrete parts, first concrete in the contractor process before they are used introduced a small height into the slot or the borehole and then the prefabricated parts into the still plastic concrete = be pressed.

The components according to the innovation are also suitable for combined use in connection with the known production in in-situ concrete, if part of the diaphragm walls, for example part of the diaphragm wall located below the base of the structure, using in-situ concrete technology is to be produced; this can initially be carried out using in-situ concrete technology, in particular using the contractor method Part of the diaphragm wall produced and then the prefabricated parts corresponding to the remaining height of the diaphragm wall in the still plastic cast-in-place concrete. Appropriately it can be provided that the reinforcement of the precast concrete part on protrudes lower end for connection with the part of the diaphragm wall made in in-situ concrete or its reinforcement.

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The component in accordance with the innovation is also suitable for simultaneous Establishing the connection of a building floor or a building ceiling to the diaphragm wall or bored pile wall; this can be expediently provided that the precast concrete parts in the area the connection of the building floor or ceiling have devices for static and / or sealing connection with the building floor or ceiling.

In certain cases, especially in the case of tunnels, It may be desirable that no diaphragm wall remains in the area above the upper edge of the building after the building has been built. For this purpose it can be provided according to one embodiment of the innovation that there are precast concrete parts at the level of the upper edge the building ceiling has a flat, continuous recess. This can be used after the completion of the building the continuous reinforcement was cut off and the upper part of the diaphragm or bored pile wall that was thus freed up in the course of backfilling the excavation.

In the following, exemplary embodiments of slotted and bored pile walls produced with components according to the innovation are based the drawing described; in this show:

Fig. 1 in horizontal section a diaphragm wall with components according to an embodiment of the innovation with the pit side Lining with wall sheets made of steel or combination sheet;

2 shows a diaphragm wall with components according to another embodiment of the innovation in horizontal section stored steel profile parts;

3, also in a horizontal sectional view, a trench wall with components according to a slightly different from FIG. 2

modified embodiment;

Fig. 4 in horizontal section a trench wall with components according to a further embodiment of the innovation, with Steel profile parts and lining on the pit side with wall sheets;

Fig. 5 in vertical section the connection between an innovation according to the invention Component and a building base;

6 shows an exemplary embodiment for a part of the diaphragm wall above the structure that can easily be drawn again;

7 to 9, each in horizontal section, different embodiments of components according to the innovation for the production of bored pile walls.

In the following, the production of diaphragm walls with reinforced concrete prefabricated parts according to the innovation in the form of reinforced concrete sheet piles is described with reference to FIGS. Here, in the usual way, a corresponding slot in the ground is first flushed out, drilled or excavated, if necessary with the aid of a supporting liquid. The slot is indicated in FIGS. 1, 3, ¹ IsS and β by its outer wall la and its wall Ib on the pit side. The precast reinforced concrete parts forming the diaphragm wall in the form of the plate-shaped or plate-shaped reinforced concrete sheet piles 2 are introduced into this slot. These are formed on their one end face with a groove 3 and on their other end face with a corresponding tongue 4 and are then attached next to one another in such a way that they interlock with their tongues and grooves; the springs 4 can be kept smaller here compared to ramming piles for Stan! sheet piling, in such a way that a cavity 5 is created,

which is subsequently grouted from above with a high-quality mortar can be, for example through special channels 6 in the groove-side end of one of the precast concrete parts 2,

The reinforced concrete sheet piles 2 are manufactured according to the innovation as precast concrete parts ₃ ie under easily controllable process conditions j such that a consistently high concrete quality can be achieved, which is not guaranteed in the known production of Schlitzwänöe with in-situ concrete in the contractor process.

The prefabricated parts 2 have a round steel reinforcement 7 of a conventional type. Furthermore, the precast reinforced concrete elements according to the innovation on connecting and sealing means, which in the following with reference to the special shown in dea Figures 1 to 6 Embodiments are illustrated.

In the embodiment shown in FIG. 1, the reinforced concrete panels are precast panels 2 over the whole area of the pit side with steel wall sheets, which according to the static requirements as Composite structure connected to the concrete. The steel sheets 8 are expediently with the reinforcement 7 in any way connected, for example screwed or welded to a conventional stirrup reinforcement, and have those for a composite structure necessary anchors or dowels with the concrete of the prefabricated part 2, for example butt welded ("shot up") bolts, welded-on brackets or welded-on stiffening ribs. The wall panels 8 act in this way as full-fledged composite reinforcements to absorb both access and shear loads, in addition to their main function as a seal and as a connecting and sealing means at the joints between two adjacent sheet piles 2. This static connection of the individual precast concrete parts 2 with one another and simultaneous sealing of the butt joints takes place

by means of connecting plates 9, which are placed in the necessary strength over the joints between two adjacent planks and with the wall panels 8 of the two precast concrete parts 2 are connected in a suitable manner, preferably by two welds 10. The attachment and welding of the sealing and connecting plates with the wall plates of the two adjacent prefabricated parts takes place in sections in the course of the excavation, with the connecting plates 9 ensure static power transmission and, at the same time, reliable sealing of the joints; it This creates a continuous longitudinal reinforcement, which is produced in sections in the course of the excavation.

The equipment of the precast concrete parts 2 with the wall panels 8, in connection with the high concrete quality that can be achieved from home the precast concrete parts, guarantee in connection with the joint sealing by the connecting and sealing plates reliable watertightness.

In cases in which sufficient watertightness is already guaranteed by the concrete properties of the precast element, especially when using prestressed precast concrete elements, where the concrete already has watertight properties due to the applied prestress ₃ , continuous cladding of the precast concrete elements on their construction pit side can be dispensed with. The static connection and butt joint sealing between the prefabricated parts arranged next to one another is then expediently carried out with the help of steel _{profile elements 3} embedded in the prefabricated parts in conjunction with externally applied connection sheets of this type are shown in detail in FIGS. 2 and 3. In the embodiment shown in Fig. 2, pit-set steel profile parts 11 are embedded in the concrete on the abutting sides of the precast concrete parts 2;

860977221; ». 72

Define the right corners of the precast concrete elements.

The static connection of the adjoining prefabricated parts and the butt joint is sealed again by means of and Biehüngsblochen 9 »which over the pit side exposed legs of the profile angle 11 and placed with them in a suitable manner, preferably by welding, are connected. The anchoring of the steel profile parts 11 in the precast concrete 2 can take place in any manner known per se. In the embodiment shown in Fig. 2, the steel profile parts 11 are with the conventional round steel reinforcement 7 of the precast concrete part 2 is not connected separately. In Figure 3, an embodiment is shown, which largely with the Embodiment according to FIG. 2 coincides, however, the Steel profile parts 11 with the conventional reinforcement 7 at 7a connected is. In addition, in Fig. 3 there is also a special reinforcement 7b for that acting as a spring of the hat-spring connection Part of the sheet piles indicated.

FIG. 4 shows an exemplary embodiment which represents a combination of the embodiments according to FIG. 1 on the one hand and according to FIGS. 2 and 3 on the other hand, in which the precast concrete parts 2 on the pit side include both longitudinal steel profile parts 11 and continuous wall sheets 8 exhibit. The static connection of the adjacent sheet piles 2 and the simultaneous sealing of the butt joint can in turn take place by means of connecting and sealing strips 9 placed over the butt joint, which are connected in a suitable manner _3, preferably by welding, to the wall plates and / or cantilever profiles of the abutting precast concrete elements «at 12 FIG. 4 shows an alternative embodiment of the static connection and sealing at the joints; with a correspondingly strong formation of the wall plate 8 or * the steel profile 11, this can be formed protruding on the hand of the prefabricated part 3 ^, in such a way.

that the protruding part 12 can be connected directly to the wall plate or corner profile of the adjacent precast concrete part. This embodiment is technically simpler, since there is no need to attach special connecting plates 9 and when the connection is made by welding a single weld seam ( ^{indicated in Pig. 1} J at 13) is sufficient, compared to two weld seams 10 when using the separate connecting plates 9.

When the sheet piles 2 are introduced into the excavated slot la, Ib, the prefabricated parts are guided by a correspondingly strong guide led above; in connection with the adjacent, already introduced prefabricated part and the tongue and groove engagement with This caused guidance ensures the exact fit of the finished parts. The remaining cavity m on the outside is either compacted with the excavated material or preferably filled with lean concrete using a contractor or a similar method . Any necessary expansion joints can be provided without difficulty by appropriately designing the prefabricated parts will.

The introduced prefabricated sheet piles 2 can in the simplest case be placed directly on the protective sole. Alternatively can to ensure a particularly secure integration into the upcoming To ensure soil, concrete can be placed in the slot at a certain low height using the contractor method ^ viorauf the prefabricated parts are then pressed into the still plastic concrete will.

The wall plates 8 and / or the steel profiles 11 and the corresponding sealing and connecting parts 9 £> between. 12 do not need to extend over the entire length of the prefabricated parts 2 ^ but only as far as ₅ as required for the later building

6M97722M.72

is. The prefabricated part according to the innovation is also very suitable good for combination with conventional diaphragm wall concreting methods., if it appears advantageous for economic or other reasons, the one below the base of the excavation to manufacture the parts of the walls in the contractor process; here it can be expediently provided that the Reinforcement 7 of the prefabricated parts 2 protrudes at the lower end in any length, and after moving the prefabricated parts this The lower area is concreted over a recess in the precast part using the normal contractor method.

The component according to the innovation also allows a connection to be established between the diaphragm wall in a simple manner and a building floor or a building ceiling with Sealing connection. In Fig. 5, the connection between a precast concrete part 2 according to the innovation is in vertical section Wall plate 8 on the pit side and a building base 15 are shown. The wall plate 8 is in the area of the connection with the building floor 15 with clamping devices 16 for production a tightly fitting connection with sole insulation 17 provided; Furthermore, the wall sheet 8 has welded-on static supports 18 for the sole 15, the reinforcement thereof 19 is indicated.

In some cases, particularly in the case of tunnel structures, it may be desirable that no diaphragm wall parts remain in the area above the uppermost ceiling after the structure has been built. This can for example be achieved in that the precast concrete used for the diaphragm wall has at that point a continuous shallow recess so ₃ that the slot wall prefabricated practically consists of two separate from each other by the recess portions, with the innovation according to the component represented by the reinforcement together-

are held. After the construction, for example the tunnel ceiling, has been produced, the reinforcement is then placed at the cut-out point severed, in such a way that the upper part of the prefabricated part is drawn again after backfilling the excavation and, if necessary can be used for further use. According to one shown in Fig. 6 The alternative illustrated can be provided for the same purpose that in the area above the structures in which later no diaphragm walls are preferred, panels 20 composed of sheet piles and cross girders between vertical Carrier 21 are inserted; these panels form the construction pit wall; which are easily pulled back after the building has been completed can be.

The embodiments of the innovation according to the invention described above Components for diaphragm wall constructions serve only as examples, d5.e of course modified in many ways can be. With regard to the dimensions, in particular the height and width of the precast concrete elements, exist no restrictions in principle; these are based on the static conditions or on the weight of the required length can still be managed by the commercially available lifting equipment. Also with regard to the shape of the precast reinforced concrete parts and the wall plates and / or steel profile parts provided for connection and sealing are the most varied Variations are possible depending on the respective building requirements. In addition to the sheet pile wall shapes described, simple or Double-T-beams, normal beams, cross-sections with recesses, semicircular profiles, etc. are possible. Essential is alone the basic idea, which consists in the use of prefabricated parts, which are formed with steel parts so that they after Once the excavation has been excavated, they can be statically and properly connected to one another in terms of sealing.

Modifications are also possible with regard to the type of connection. For example, instead of welding the connecting plates to the wall plates and / or the profile parts or the protruding edge of the wall plates, gluing with high-strength adhesives could also be provided. Furthermore, in cases ₃ where the static connection of the prefabricated parts takes place in some other way, for example by screwing or clamping the engaging steel profile parts of adjoining prefabricated parts, or where a significant loadable static connection is not required, the butt joints could also be sealed by plastic foils, which are in the prefabricated concrete are stored or glued to the end faces of the finished parts and are connected to one another with freely overlapping parts _s for example by welding or gluing.

In the following, the production of bored pile walls from prefabricated parts according to the innovation with continuous reinforcement and seal is described with reference to FIGS. The most appropriate shape for the piles prefabricated as reinforced concrete parts is likely to be the shape of the half-moon piles, ie pile shapes which are convex or concave crescent-shaped in cross-section in the areas intended for connecting the next bored piles. Otherwise, however, the shape of the prefabricated parts allows for many possible variations. In FIGS. 7 and 8, bored pile walls are shown, which consist of the sequence of pile shapes 23 and pile shapes 2k with a predominantly circular sector-shaped cross-section, which have parallel sides, wherein in FIG. 7 two similar pile shapes are arranged in pairs one after the other, while in FIG Pile shapes 23 and 2k alternate with one another. In the embodiment shown in FIG. 9, both successive bored piles are convex on the mutually facing sides, again with

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/ 13 ^l

Section S forms 26 with parallel sides and a cross - _t-sectional shape 26 having a substantially part-circular cross-j successive cut. The individual bored piles have round steel reinforcements 7 of the conventional type; On the pit side, they have steel profiles 11 or 11a and partially continuous wall sheets 8 for sealing and as composite reinforcement. The connection of the individual bored piles with one another and the sealing of the butt joints is again carried out by means of connecting plates 9> which are welded to the steel profile parts 11 or 11a or to the wall plates 8 of abutting bored piles.

In the usual way in the production of bored pile walls, a borehole is first made, depending on the type of soil and the flow of water manufactured with or without piping; A prefabricated part 23 to 26 is then placed in this borehole. The concave The crescent-shaped recess of the finished part used enables the next borehole to be drilled to the correct dimensions and serves at the same time as a guide when inserting the next prefabricated pile by removing any pipework that may be used or the drilling device and the prefabricated part used in the following engages in this recess. To a secure integration to obtain, the prefabricated part, as described above in the manufacture of the diaphragm walls, and as per se in the Production of Berlin shoring known to be pressed into a lean or solid concrete. The remaining cavity the borehole is made by injection concrete or backfilling filled in, whereby only the strength of the existing soil needs to be achieved.

The variation and combination described above with reference to the production of the diaphragm walls with components according to the innovation Ion possibilities are also in the production in an analogous manner given the bored pile walls.

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The innovation has been described above with reference to preferred exemplary embodiments, which, however, are not restrictive in any way Should be important. Essential for the innovation is the design of the components for the manufacture of seat and and bored pile walls as a precast reinforced concrete part the prefabricated parts are statically and sealed with one another by means of steel parts provided in or on the prefabricated parts can be connected.

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Claims (8)

Protection to s ρ r ü c h e 1. Component for the production of slotted or bored pile walls for construction pit enclosures, building security and permanent building walls, characterized by the design as reinforced concrete or prestressed concrete prefabricated part (2, Flgg. 1 to 6; 23 to 26, Fig. 7 to 9), which Has steel parts (8,9JlIjIIa) for static connection and / or sealing with adjacent prefabricated concrete components and has a cross-section corresponding to the diaphragm or bored pile wall./ 2. Component according to claim 1, characterized in that that the precast reinforced concrete part is lined continuously with wall plate (8) on its inner surface on the side of the pit in the installed state whose edges are used for waterproofing and power transmission between adjacent components. . 3. Component according to claim 1 or 2, characterized in that that the precast concrete part on the pit side steel profile parts (11 j, lla) for connection and / or sealing between adjacent ones Has precast concrete elements / 4. Component according to claim 2 or 3j, characterized in that that the wall plate (8) and / or the steel profile parts (11) are connected to a round steel reinforcement (7) of the precast concrete part are. 5. Component according to one or more of the preceding claims, characterized. That the reinforcement of the Precast concrete part at the lower end for connection with a part of the diaphragm wall made in in-situ concrete or its reinforcement protrudes./ 6. Component according to one or more of the preceding claims, for the simultaneous production of the connection of a building slab or a building ceiling to a Slotted or bored pile wall, characterized in that that the precast concrete part (2, Fig. 5) in the area the connection of the building floor (15) or ceiling welded supports (18) or clamping devices (16) for static and / or sealing connection with the building floor or ceiling. ^ - T. component nacia one or more of the preceding claims, For use in cases where there is none in the area above the top of the building after completion of the building Diaphragm wall parts are desired, characterized in that the precast concrete part in the amount of Upper edge of the building's ceiling a flat, continuous recess having. / 8. Component according to one or more of the preceding claims, characterized in that the precast concrete part on its side faces with a groove (3) and tongue (* 1) for engagement with neighboring components is trained. /