DE3129643C2 - Concrete ring lining for manholes and the use of such a lining for repairing manholes that have already been built - Google Patents

Abstract

In the case of a ring lining for manholes, whose supporting structure, which is preferably backfilled with a sliding compound and consisting of concrete rings, has axial joints in its radial butt joints, which serve to seal the manhole in the butt joints and with which the concrete rings are supported on one another, is to simplify the manhole lining and for Avoidance of edge pressures on the concrete parts in the wake of the adaptation of the load-bearing expansion to the deformations of the shaft provided that the rings made of solid concrete serve as a seal for the shaft between the butt joints, in which adjacent concrete surfaces of the rings are separated with squeezing, and that the Rings in the connecting joints (18) are movable tilting with one-sided opening of the butt joints.

Description

a) the horizontal ring joints (11) are on the The side facing away from the excavated wall bridged by connecting joints;

b) the connecting joints each consist of two angle profiles, one of which Leg (14 or 15) in one of the end faces delimiting the respective annular joint (e.g. 12, 13) adjacent concrete rings (9, 10) is concreted in and the other tavern! (e.g. 16 resp. 17), forming the joint delimitation, in a recess in the associated end face (12 or 13) of the associated Betciringes (9, 10) is arranged, the non-concreted Legs (16, 17) of adjacent concrete rings (9, 10) at their free ends (19, 20) with a die with a pinch (21) provided joint (11) bridging ring spring (18) welded are.

2. Ring expansion according to claim t, characterized in that that the free ends (19, 20) of the exposed legs (16, 17) of the angle profiles in recesses (25,26) of the concrete rings (9,10).

3. Ring extension according to one of claims 1 to 2, characterized in that a sealing ring (24a) arranged between it and the annular spring (18) adjoins the pinch position (21) in the joints (11).

4. Ring support according to one of claims 1 to 3, characterized in that the individual concrete rings (9,10) in a manner known per se from segments (53, 54) with the formation of vertical butt joints (55) are composed, which are connected by sealing radial joints, and that the concrete ring segments (53, 54) in the connecting joints with opening and closing of the vertical joints (55) are movable tangentially.

5. ring support according to one of claims 1 to 4, characterized in that the connecting joints the butt joints (55) are designed like the connecting joints of the ring joints (U) and the associated Ring feathers (18, 18 £>, f these joints with one another are connected.

6. Use of a ring support according to claims I to 5 as a front column for a repairable, Shaft originally having a segment lining, characterized in that the ring joints (11) of the concrete ring lining in the plane the segment flanges (44, 45) are placed.

7. Use of a ring support according to claims 1 to 5 as a front column for a to be renovated, Shaft originally built with segments, characterized in that the ring joints (11) in the area of the segment flanges (44,

45) are placed that the pinch (21) of their connecting joints each directly on the underside (51) of the annular flanges (44) of the segment lining (40,42) are in contact.

The invention relates to a concrete ring lining for manholes according to the preamble of claim I.

The invention also relates to the use of such an extension for repairing already removed Shafts.

With such an expansion, day shafts are preferably brought down using the freezing process Part expanded. In the previously common, mountain-connected manhole support in Tübbingen it was assumed that the shafts by previously established safety pillars not from the The rock movements caused by the mining are recorded. In the manhole ring lining according to the invention on the other hand, one does not only record the mountain movements that one cannot avoid earlier could. The rock movements caused by the bypassing in the area of the shaft are also removed Degradation are triggered. This is due to the composition, which is usually made up of an asphalt mass existing sliding layer. This separates the load-bearing shaft lining from the mountains that are in can adapt the butt joints of the individual rings to the curvatures in the shaft axis, soft through the floating movements of the mountains are triggered. In addition, such a manhole ring expansion must still have the same properties as the slab concrete lining already owns. This includes, above all, the sealing of the shaft in the case of the required Expansion resistance.

The invention is based on a decanted concrete ring expansion for manholes. This is where the seal is made of the shaft with a closed steel cylinder that is back-filled with the sliding compound and in which the rings of the load-bearing structure made of in-situ or precast concrete are placed on top of one another (DE-PS 11 67 777). In the steel cylinder, the concrete rings that form a cylinder body are independent of one another tilting both in the direction of the shaft axis and among each other with one-sided opening of the joints movable. This makes it possible without losing the tightness of the shaft curvatures Manholes and, to a limited extent, also compressions and elongations.

On the other hand, such steel cylinders are subject to considerable stresses. One has to do that through use a material with high elongation at break and sufficient strength with high flow grenix. as take into account in detail through special training of the shaft extension. On the one hand, that must Steel cylinder inside executed in its entire length £; latted will. On the other hand, a thin, further sliding layer are attached, which allows the relative movements that occur in the described Adjust the deformations of the shaft between the supporting structure and the steel cylinder. As a result Proper concrete ring expansion of this type is therefore associated with considerable technical effort, especially since the expansion often does not take place as a whole and all at once with the usual manhole ring measurements.

can bring

In operation it is also found that considerable edge pressures occur in the butt joints on the concrete rings. As is well known, concrete parts are very sensitive to this, because this causes the concrete to have a high local level Shear forces that lead to the formation of cracks or flaking. Give cause for sharing.

In the known, after the one described above manhole ring expansion is also based on principle known (Glückauf 103 (1967) 12,553,560-553,554, in particular Paragraphs 1 and 2 -) to provide connecting joints between the concrete rings. To do this, the Concrete rings each have an inner and an outer steel jacket made of U-profile sections. Neighbors Concrete rings of this type are supported on one another with the radially oriented flanges of the steel jackets. the Supported steel flanges are riveted and in this way form a seal against the Sliding layer

The inner and outer steel jacket represent a significantly higher cost compared to extension rings, which are designed as solid concrete rings, <'■ h. consist of a non-reinforced concrete or reinforced concrete. In addition, the inner steel jacket is sensitive to corrosion and water pressure and can therefore only be protected with difficulty against leaks during the relatively long service life of day shifts. Solid concrete rings, on the other hand, can be made watertight and are not subject to corrosion.

The aforementioned, previously known expansion also has practically only within the rivet connections given limits the possibility of following the mountain movements in the manner described adjusting deformations of the shaft tube. It is sufficient to deal with the within a Shaft safety pillar to compensate for rock movements that occur, among other things. by the strongly flattening The critical angles in the floating mountain layers are anything. Without shaft safety pillars but must rock movements and consequently deformations of the concrete rings bf-standing. supporting shaft column, which overload the connections described.

It is already known (DE-OS 29 22 327; DE-AS 28 08 387). building on the above Manhole ring construction connecting joints with relaiiv low bending stiffness in the horizontal joints To be provided With such an expansion, the concrete rings are also to be provided with one inner and one outer Steel jacket provided. The sheaths are on the radial ring surfaces with disc-shaped steel flanges tied together. These flanges are parts of elastic rings, soft the connecting joints described form.

As well-known bills (news for mining of GHH. Sterkrade issue 1 »The stability sliding manhole pipes as articulated chain «), such an expansion kinks under certain conditions Conditions are not met. For this purpose, the main requirement must be met that the weight of the expansion does not exceed its buoyancy in the sliding layer. the Forming the connecting joints is also relatively complicated, because these are not only the elastically yielding ones Links of an articulated chain should form, but also the sealing of the shaft to the Create horizontal butt joints in the projecting structure have to.

In an otherwise known concrete ring lining for manholes (magazine »Glückauf« 117 (198t) No. 7, 374 and 375) are the successive steel-reinforced sections of the shaft lining with two angle profiles connected, each with a leg in one of the end faces delimiting the respective annular joint adjacent concrete rings are concreted in. The legs of adjacent concrete rings that are not set in concrete are welded together at their free ends. However, the individual sections are not articulated here connected to one another, as the flanges are not only welded to one another but also to one another are screwed.

The invention is based on the object of a composite of concrete rings arranged on top of one another Shaft expansion of the type described above to continue to develop that even if the at such an expansion usually as a sealing element used, continuously closed sheet steel jacket, a watertight shaft extension

Λ ΐ ** ΐ ** 1 WUl ΐτϊΐ * VV \ JM ^ t UUWIl U.Ul XJ3W WrkUllll V ^ * ^ / ftUUIUlltltlUll the individual concrete rings can be dispensed with.

This task is done with the characteristic Meikmalen of claim 1 solved. Expedient embodiments of the invention are the subject of the claims.

The use according to the invention of the rings made of solid concrete for sealing the manhole between the butt joints makes it possible to dispense with the previously required external and internal walls Stole. That yield! a significantly simplified overall structure of the expansion, which reduces the technical effort lowers and simplifies and accelerates the work for introducing the extension. The connecting joints use the sliding layer additionally by causing the rings to tilt and move. In the Butt joints and outside the connecting joints However, the concrete rings still depend on each other, which improves the buckling resistance Edge pressure, however, is avoided by the known means of squeezing.

The main advantage of the invention is that you only have to work in the area of the connecting joints Steel parts are used, which can therefore be reliably protected against corrosion, and that despite the joints the concrete rings supported on each other, which are in the course of curvatures in the shaft axis on each other roll off, whereby the edge pressures are switched off by the crushing.

In the invention, arranged in the connecting joints annular spring has the advantage of that with it not nu ^r the necessary joint, but also an inner seal of the joint form can, so that the joint sealing dene.t also in the points at a Unilateral opening of the butt joints sets, is considerably simplified. A soft ring spring can be z. B. in a flat iron that is welded together on the spot with the help of vertical seams to form a resilient ring arranged in a radial plane of the shaft, for example.

With the features of the claim? one moves the ring spring in the butt joint. In this way one can, in the case of the described, in the course of curvatures in the shaft axis sioh adjusting rolling movement Prevent adjacent concrete rings from being pressed against the edges on the inside of the manhole without also being able to attaches squeezing there.

if the butt joint opens, it depends on the restoring force the described ring seal from when the opening has reached a level at which the gaping part the butt joint is no longer sealed against the ingress of sliding compound. Because of that and not about yourself rely solely on the tightness of the ring spring must, a further seal is provided with the features of claim 3; which of the ring spring is upstream.

So far it has been assumed that the concrete rings are essentially rigid in the tangential direction, even if they are composed of several segments. This is intended to cause excessive dents of the steel jacket provided in conventional manhole extensions can be avoided. on the other hand One-sided loads on the manhole rings can occur in the course of the loads on the rock, which act as radial pressures and strains on the supporting shaft lining. With the features of claim 4, therefore, the ring expansion is designed so that connecting joints are also radial joints result, so that the concrete ring segments in the joints open or close the vertical Can move butt joints radially.

Legs 14 and 15 axially and with the leg 16 and 17 at right angles thereto oriented radially in the ring. she are used to attach an annular spring 18, which is located within the annular joint and according to the embodiment

play at the ends 19 and 20 of the legs 16, 17 facing the inside of the manhole, each welded with a fillet weld is. The ring spring 18 consists of a flat iron which is curved according to the ring shape. The legs 16 and 17 of the profiles and the end faces of the end faces 12, 13 formed by the concrete Rings are supported on flax chipboard, which form a pinch layer 21. The crush is enough, however not all the way to the outer surface 22 of the supporting structure, so that an outer annular groove 23 is formed in which has a ring seal 24 which is supported on the inside of the pinch seal 21. Between the bruises 21 and the ring spring 18 is located according to the embodiment al «O-Rintr 2 ^ i? trained further Sealing ring.

When building the supporting structure, the concrete rings are placed, as shown in the illustration in FIG. 2 based on the annular joint between the concrete rings 9 and 10 emerges, one on top of the other. Before that, you have the bruise 21 and the outer seal 24 attached. Thereafter

The subject of the invention is described below with reference to FIG. 25, the inner ring seal 24a ~ is inserted and fastened of the exemplary embodiment shown in the drawings, the annular spring 18 with the free endings subsequently explained in more detail; it shows the 19, "3. These lie within recesses 25,

F i g. 1 schematically and in longitudinal section the ab- 26 on the inner surface 27 of the concrete rings and cut someone standing in the floating mountains behind the later shaft joint. The Aussparun day shaft after a curvature occurs in the 30 gene, 29 ge shaft axis with a solidifying potting compound in longitudinal section, fills, which cover the steel parts ·. and so from corrosion

F i g. 2 the detail of FIG. 2 labeled B. 1 on an enlarged scale,

F i g. 3 shows a modified embodiment of the invention in FIG. 2 corresponding representation,

F i g. 4 the repair of a segment shaft with the aid of a concrete ring exterior designed according to the invention protects After introducing one or more rings, they are backfilled with an asphalt compound, which a sliding layer 30 forms. This is arranged between the preliminary expansion 4 and the concrete rings 6-10. The seal 24 and the sealing ring 24a ensure that the shaft is blocked against from the outside

Build in longitudinal section through a shaft joint in drained water and against the penetration of the asphalt mass broken representation, the sliding layer 30 remains tight, while between the

FIG. 5, in the representation corresponding to FIG.
Segment shaft and

F i g. 6 shows a manhole ring lining according to the invention with additional vertical butt joints in elevation and FIG

broken representation.

In the embodiment according to FIGS. 1 and 2 it is the first construction of a sunk shaft. The mountain body 1 is frozen State erupted, as a result of which the rock face 2 occurs a curvature in the one drawn at 32 Shaft axis, the concrete rings 6-9 are tilted, the ring joints 11 open on the outside 33 of curvature, while on the inside 34 the Ring spring 18 is loaded on bending and compression. The unilateral opening of the annular joint at 33 leads to Relief of the seal 24, whose restoring forces, however, have a balancing effect and the joint is initially tight

This is initially provisional, z. B. hold up with 50. Edge pressures do not occur because Jiese sprayed concrete secured at 3 The fuse is used by the bruising 21 of the sensitive forehead Introduction of a preliminary expansion 4, which are kept away from concrete according to surfaces 12, 13. The inside The illustrated embodiment made of molded stone sealing ring 24a retains its sealing function, imagine consists, which are put together to form rings. Since the resilience of the ring spring 18 rend for a Such an expansion can be introduced intermittently 55 ensures seamless deformation of the connecting joint must, there is a certain depth in each case Shaft base, which is shown at 5, generally use bending radii of 3000 m. The

As soon as the sight is provisionally expanded, the deformations that occur are introduced into the final expansion. This consists of single connecting joints easily grown,
individual concrete rings which, for example, as prefabricated parts in 60 In the case of the shaft shown and described above, are lowered and placed on top of one another. Expansion is on the outer surface 22 of the concrete rings

These are shown in FIGS. 1 designated 6-110 between the concrete rings 6-10 there are ring joints II, the formation of which can be seen from the enlarged illustration of h 1 g. 2 shows

Then the end faces 12 and 13 of each concrete ring made of concrete are embedded angle profiles. These steel profiles are provided with an additional seal in the form of a polyethylene film 35 provided. These foils are applied after the concrete rings in question have been introduced and for example at the joints, as shown schematically at 36, welded together. They provide together with a paint 37 previously applied to the outer surface 22 and one between the paint

and the film 35 attached sliding layer 38 for a reliable sealing of the concrete rings, the paint and the sliding layer 38 protect the film 35 against local overloads.

The embodiment according to FIG. 3 differs in this respect from the embodiment according to FIGS F i g. 1 and 2. In this embodiment, a film 3S protective paint 37 is followed by one Sliding layer 38 is provided. On the outside of the film, however, there is a fleece 39, the one over the entire surface 22 forms a continuous layer and is again covered on the outside with a film 3t can. This allows the water that is sitting there to be drained.

The F i g. 4 and 5 show the application of the manhole ring construction described for solving a repair task. This is an existing shaft built in steel segments. The ring-shaped tubing rings 40-42 have ring flanges or tubbing flanges 43 and 44, 45. In the event of an impending leakage of the segment lining or when an existing shaft safety pillar has to be dismantled and consequently the segment lining has to be overloaded, the task arises of expanding the existing shaft in such a way that its load-bearing structure can withstand loads such as those shown in FIG. 2 are shown schematically. In the embodiment according to FIG. 5 one uses again concrete rings for the load-bearing expansion, of which, however, two adjacent concrete rings 47 and 48 are drawn. These two concrete rings are produced with the aid of a lost outer formwork 49 and a recoverable inner formwork (not shown) in in-situ concrete, with reinforcement being provided, which is shown in phantom and shown schematically at 46. In the area of the tubbing flanges 44, 45 of the tubbing 40-42, annular joints 11 meet. The horizontal annular joint is shown in FIG. 6 and is formed between the concrete rings 9 and 10. The vertical joints 55 in turn are provided with joints corresponding to their training after derr in connection with FIGS. 1 and described to 5 joints of the ring groove 11, as shown, there arises matching reference numerals from the designated with the index B. Of course, there are also corresponding recesses that are later closed with a potting compound. In order to bring the concrete ring segments 53, 54 into the correct position to one another required for welding in the ring spring 186, recesses 57 are provided in the outer profile legs 16 and 7b

is appropriate. They are the size of an M 16 screw, so that a screw bolt can be inserted as a straightening element. The ring spring iSb is welded at its vertical end, as shown at 58, with the hooves of a Kehinähi to the ring spring IS of the ring segments in this direction

25 gen.

Ultimately, such vertical butt joints, even during repair work according to FIGS. 4 and 5 are provided.

30th

35 Here are 5 sheets of drawings

3 training described. The only difference because of the in-situ concrete design is that between the annular spring 18 laid in the annular joint during such an expansion and the inside 27 of the concrete ring expansion Squeezing in the form of flax chipboard, as indicated at 50 are provided. Behind the lost Formwork 49 and the inside of the segment lining are introduced with the asphalt mass in stages. The later the sliding layer 30 forms, which according to FIG. 5 is replaced on partial lengths 43a by earth pressure plates

Such a repair has the advantage that the existing segment lining can be used as a preliminary expansion continued to be used and only a minor restriction of the existing shaft cross-section to be accepted needs

In the embodiment according to FIG on the other hand, integrating the segment lining into the concrete ring lining as backfilling by using the segment lining as Formwork used and the connecting joints in the annular joints 11 are arranged so that the pinch 21 each lie directly on the underside 51 of the annular flanges 44 of the segment lining. Because of the sealing, the segment lining through the annular spring 18 and possibly through the sealing ring 24a does not need to hold tight, the result is an articulated shaft extension that is sufficiently tight

In the embodiment according to FIG. 6 will be the concrete rings Installed in segments as prefabricated parts Then between the individual ring segments 53, 54 vertical butt joints 55, those with the horizontal

Claims (1)

Patent claims: 1. Ring expansion for manholes, consisting of one above the other arranged, no steel casing having concrete rings, which are arranged one above the other a shaft column that is flexible in relation to loads acting on it radially to the shaft axis form, soft preferably can be backfilled with a sliding compound, the adjacent concrete rings support each other to form a horizontal ring joint, marked by combining the following characteristics: