DE1634401A1 - Process for the production of cesspools, caissons or shafts as well as a basic structure designed as a cesspool, caissons - Google Patents

Description

Patent application

Process for the production of cesspools, caissons or · shafts as well as a basic structure designed as a cesspool, caissons

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The invention relates to a method for producing Sink wells, caissons or shafts as well as a base structure designed as a sink well, caisson or shaft.

The usual production of e.g. for the formation of foundations or sink wells or caissons used for water production takes place in such a way that the wall of the sink body walled up on a countersink, concreted or by stacking prefabricated well rings formed and the countersink with the wall resting on it, taking advantage of the weight of the same gradually is lowered. Among other things, there is the disadvantage here that floor collapses and cavities occur under the countersink can arise, although with further lowering by the

009819/0313

BATH ORIGINAL

The well wall to be covered after the inside of the well, but generally cannot be eliminated. Such cavities can long after the completion of the sink well to subsidence and to collapse in "terrain height" as well as to damage to neighboring structures or in the ground routed cables. The lowering of foundations on slopes or other unfavorable soil conditions can also be used lead to disturbances of the state of equilibrium in the soil, so that terrain breaks occur on slopes, for example fe kömsn.

From the Austrian patent specification 20 271, it is known to avoid such disadvantages for production a cesspool prefabricated concrete rings according to the construction progress one below the other in each case finished concrete ring to install excavated sections about the height of a concrete ring. Here, however, v / ground the respective excavation sections are made with a diameter that is considerably larger than the outer diameter the concrete rings, so that in each of the excavation sections that follow one another downwards, a free annular space between the Outer surface of the concrete ring in question and the pending soil is formed, which is filled with in-situ concrete. These well-known construction is relatively expensive, since it has additional besides the prefabricated concrete rings or frames Excavation work and the introduction of additional concrete required, which is not necessary for the load-bearing capacity of the well wall

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is exploitable and for which the prefabricated rings or frames form a permanent formwork. In addition, they have to go to the first concrete ring downwards following 'concrete rings each in Sections are built in, which increases the effort will. It is also not possible to have the well, box or shaft wall with inner and outer ring reinforcements to be provided that are connected to each other. can.

By the invention, a method is in contrast to similar create Ge, operating at the likewise with after successive below excavation sections, but in which subsidence or disturbances of the equilibrium state are avoided in the ground, must be carried out without any additional excavation and concrete work in excess of the work to be carried out to produce the hinge and frame in the strength required to absorb the earth pressure forces.

Accordingly, the invention consists in a displacer, to ' Manufacture of sink wells, caissons or shafts in which the well, box or shaft wall through each other resulting formation of well rings, box or manhole frames made of concrete or reinforced concrete in each case under a finished ring or frame made excavation sections of about the height of a well ring or frame being, in that the downward successive rings

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or frame with the help of removable inner formwork can only be formed from in-situ concrete, which is directly adjacent to the pending on the circumference of an excavated section The ground is concreted.

The method can be carried out in such a way that a cesspool, caisson or shaft trained basic structure is created, in which the on the

top ring or frame down following rings or frame all have the same dimensions with respect to their top and lower boundary surface as well as "have their inner surface and the inner surfaces of all rings or frames rise inwardly from bottom to top at the same angle of inclination, so that the inner surface of the well, box or shaft wall is designed in a sawtooth shape in longitudinal section.

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Instead, however, \ a corresponding basic structure can be created in which all rings or frames with perpendicular to their upper and lower boundary surfaces Inner surfaces are provided and the rings or frames following the uppermost ring or frame opposite each other The upper ring or frame protrudes inwards so that the well, box or shaft wall on the inside in Longitudinal section is step-shaped ..

In any case, when the invention is used, it is achieved that all to form the wall of the basic structure or Cast-in-place concrete rings or frames only in

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the strength required to absorb the earth pressure forces need to be made and with an inner and out ring reinforcement can be provided, which are connected to each other by a stirrup reinforcement. The In-situ concrete rings or frames in a preferred embodiment with the aid of an inner formwork that is the same for all rings or frames are concreted, which after each completion a ring or frame for concreting the next ■ lower ring or frame in the excavation section formed for this purpose by means of rope guides, racks or pneumatic (| or hydraulic lifting devices can be lowered.

The invention is based on the in the drawing illustrated embodiments illustrated as examples.

The drawing shows in a schematic representation:

Pig. "1 shows a vertical section through a sink well with an associated top view;

Pig. 2 shows a vertical section through a caisson or shaft, the wall of which is pointing downwards has increasing strength, also with plan view; .

Pig. 3 a construction stage during the manufacture of the sink well after Pig. 1 in vertical section;

Pig. 4 for the production of the Pig sink well. 3 ' used formwork ring in plan view, and

Pig. 5 a vertical section through the formwork ring after Pig. 4 in an enlarged view with

Details.

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ORIGINAL

The one in Pig. 1 sink well shown in the finished state 10 is produced in the manner shown in FIG. 3 in such a way that its wall 17 changes with the progress of construction rings 1, ″ 2, 3 built below one another are formed which are successively made of reinforced in-situ concrete, These in-situ concrete rings all have the same frustoconical shape designed inner surface 11, from the lower GretäTläche 12 upwards inwards to the upper limiter area 13 of the respective ring increases. All in-situ concrete rings 1, 2, 3 also have the lower and upper boundary surfaces 12, 13 same inside diameter and are concreted in such a way that their frustoconical inner surfaces 11 are perpendicular to one another lie. In this way, the wall 7 of the finished sink well 10 is sawtooth-shaped on its inside in a vertical section designed. The in-situ concrete rings 2, 3 have the same average wall thickness, while the average wall thickness of the uppermost in-situ concrete ring 1 can be larger, so that this ring, as shown in FIGS. 1 and 3, protrudes outward. In this embodiment, the in-situ concrete rings protrude 2, 3 with their upper boundary surface 13 opposite the lower boundary surfaces 12 of the one above them Concrete rings with the formation of equal ring surfaces 5 before.

G-emäss Fig. 3 is used to produce the sink well first excavated from the top of the ground to the depth indicated by the dash-dotted line 1, whereupon the formwork shown in Fig. 3 in the form

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a prefabricated, but dismantled into individual arched pieces

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barren, frustoconical. Formwork ring 6 on the Lower edge of this excavation section 1 "is placed against the ground.

Depending on the diameter of the sink well and the height of the cast-in-place concrete rings to be formed, e.g. may be a meter ·, comprises the formwork ring 6 a very strong construction and can according to Mg. 5 consist of a lower strap ring and an upper strap ring 19 made of steel girders + interconnected by truss members 20 and a Holzausfütterung 21 for the attachment of the Forming surface forming planks 22 are provided. Like Pig. 3 and 4 show, the support ring 6 is attached to a cable guide 7 "whose cables can be attached to the three points 23 of the formwork ring 6 and can be lowered by means of the cable guide". The formwork ring thus forms an inverted climbing formwork.

After or before the insertion of the shuttering ring 6 (the reinforcement 14 in the form of a ready-braided reinforcement cage from an inner and outer ring reinforcement and these connecting brackets are inserted into the space between the formwork ring 6 and the circumferential limit 15 of the excavation section 1 " and this space is concreted to form the top in-situ concrete ring *

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Then the floor is raised to the point indicated by the dash-dotted line Line 2 'is excavated and the excavation section 2 "is formed, the circumference of which is 16 has a slightly smaller diameter than the excavation section 1. Then the reinforcement 24 for the second ring introduced and the shuttering ring 6 from its position on the cast-in-place concrete ring 1 on the lower edge of the excavated section 2 "are placed on the existing ground. The in-situ concrete ring 2 can then be concreted after its completion the work on the formation of the in-situ concrete rings following below is explained in the for the second in-situ concrete ring Repeat way. The concrete for the rings 2, 3 following the uppermost in-situ concrete ring 1 is each replaced by the later annular surface 5 corresponding annular gap between the rising inner surface of the respective upper ring and the placed under this inwardly protruding formwork ring 6.

When the in-situ concrete ring, denoted by 3 in FIG. 1, has been completed and the last or deepest excavation section has been excavated, the formwork ring 6 is placed on the soil that is now on the lower edge of the sink well 10. The last in-situ concrete ring can then be concreted and then the formwork ring 6 broken down into its curved pieces, for example three curved pieces, and removed from the sink well. Instead of the last formwork ring, however, as shown in FIG. 1, a sole or

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Floor slab 4 are concreted, with the in-situ concrete as well as with the previous rings 1, 2, 3 close to the circumference pending soil, is concreted. In this case, the formwork ring 6 is taken apart before concreting and lifted out of the sink well. In the border area between the lower edge of the base plate 4 and the floor can be used, for example, to form a foundation body Sunk well cavities 9 are left in which a solidifying agent or substances, such as cement mortar, for Preloading the soil can be injected. In addition, the in-situ concrete rings, as shown in Fig. 3, at their production by vertically arranged slack or prestressed reinforcement members 8 slack reinforced or prestressed precast concrete parts 26 or steel oarlocks with one another get connected.

In the same way as the sink well 10 can also a caisson or a shaft with a non-circular cross-sectional shape, e.g. with a square or rectangular cross-sectional shape. The lowerable formwork is then ( formed by a truncated pyramid-like inner formwork,

Also the embodiment shown in FIG. 2. Shaft or similar basic structure 29 can "when applied of the process. The inner surfaces 27 of the in-situ concrete frames 31 ″ to 34 run perpendicular and are on each side of each frame following downwards

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of the square shaft cross-section compared to the inner surface of the upper in-situ concrete frame «m the same dimension inward forward. The shaft wall 28 is therefore on each Cross-section side of the shaft .29 stepped like a staircase.

A sink well made according to the invention or Caisson can be left in the form shown, as usual, e.g. to create a well for a water extraction system to form, but it can also be filled with concrete to form a foundation body.

Patent claims:

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Claims (12)

^ ^m ι ι * ™ Claims 1, \ Process for the production of cesspools, caissons or shafts, in which the well-y box or shaft wall through the formation of well rings, box or shaft frames made of concrete or reinforced concrete in each case under a finished ring or frame of approximately the height of a well ring or frame is made, thereby identifying '· ■' · '■' ■■ draws that the downwardly successive rings ^ or frames can only be formed from in-situ concrete with the help of removable inner formwork, which is directly adjacent to the Soil pending on the circumference of an excavation section is concreted. i 2. Method according to claim 1, characterized in that that for the production of the in-situ concrete rings or frames, an inner formwork which is the same for all rings or frames, depending on the case Completion of a ring or frame for loading! toning the next lower ring or frame in the excavation section formed for this is lowered. y. Method according to claim 1 or 2, characterized in that that instead of the last ring or frame, a floor slab is concreted in. 4. The method according to claim 4, characterized in that that in the border area between the lower surface of the 0038 19/03! 3 163UQ1 Floor slab and the ground voids are left in the solidifying agents or substances for pre-loading of the subsoil. 5. Formwork for performing the method according to claim 2, characterized in that it consists of one Conical or truncated pyramid-like collapsible formwork ring or frame (6) with inwardly rising from bottom to top Formwork surface (11) consists and the concrete through the space (5) between the upper edge of the formwork surface and the Lower edge of the concrete of the respective upper ring or frame can be introduced into the formwork. 6. Formwork according to claim 5, characterized in that it racks, climbing poles on a cable guide (7) or is attached to a pneumatic or hydraulic lifting device and can be lowered by means of this. 7. Construction designed as a sink well, caisson or shaft in which the well, box or shaft wall through the formation of well rings, box or manhole frames made of concrete or reinforced concrete in each manufactured under a finished ring or frame • Excavation sections about the height of a well ring or Frame is made, characterized in that the well rings, box or manhole framesM,! / ^^ bf & ^ Vn their all the strength necessary to absorb the earth pressure from concreted directly against the surrounding soil, 6AD 009819/0313 reinforced or unreinforced in-situ concrete. 8. Building after. Claim 7> characterized in that the on the top ring or frame (1) down following rings or frames (2, 3) all have the same dimensions in relation to their upper and lower boundary surface and have their inner surface and the inner surfaces of all rings or frames (1, 2, 3) with the same angle of inclination rise from bottom to top inside, so that the inner surface of the well, box or shaft wall in a longitudinal section (J. Is designed in a sawtooth shape. 9. Structure according to claim 7, characterized in that all rings or frames to their upper and lower The boundary surfaces are provided with vertical inner surfaces (λ ^ ·) and the rings or frames following the uppermost ring or frame opposite the respective upper ring or The frame protrudes inwards so that the well, box or shaft wall (2.Ä) on the inside in a longitudinal section Is formed in a staircase. 10. Building according to one of claims 7 to 9 »thereby marked that the uppermost ring or frame has a larger V / and thickness than the following ring or frame below has and with its outer surface opposite the outer surface the other rings or frames protrudes outwards. 009819/0313 11. Structure according to one of claims 7 to 10, characterized in that the wall of the sink well, caisson or shaft (M ₁ Z ^) forming rings or frames by slack or prestressed reinforcement (ö), slack reinforced or prestressed precast concrete parts (25) or are pegged together with steel oarlocks. 12. Bauwerknach one of claims 6 to 10, characterized in that the in-situ concrete rings or frames (Ί ₍ 23ί ^ to S ¹ A form part of a later foundation body or the foundation body itself. The Xfe-tentanwalt bath 009819/0313