DE1483898C - Flexible route extension made of curved reinforced concrete segments - Google Patents

Description

3 4

absorbable bending forces are higher. The once these flax chipboards deform during operation

applied preload force is increased by creeping a certain amount. This dimension is chosen so

of the concrete only changed significantly because the elastic that the deformation of the entire structure

The deformability of the supports is much greater than the elastic deformation of the segments.

the change in shape due to creeping. 5 makes.

In particular, the end faces can be the outside of the curvature of the segment

of the reinforced concrete segments, flat chipboard supports are provided with a friction-reducing support,

th received. which is not shown, however.

It is also advisable to carry out the expansion in per se. 3 and 4 are the segments with their

As is known, by driving wedges between io ren end-face supports butted on top of one another.

successive segments or by Vermör- This results in an elastic at the joints B.

Teln additionally to be tensioned against the mountains. yielding joint. Even if the segments

The outside of the reinforced concrete segments can twist at the joints B , but remains almost one

a friction-reducing edition, for example even distribution of compressive stresses in the

be provided with a bitumen paint. 15 segment cross-section obtained. This will cause the

In the following, the invention is reliably prevented on the basis of the disturbance of the segments. As all-

The exemplary embodiments shown in the drawings common dimensioning rule may apply that the

explained in more detail. It shows resistance in the case of solid rock at joint points B.

F i g. 1 in a perspective view a between the segment 7 with little yielding

curved segment for expansion according to the invention 20 deposits is formed, while with less solid

dung, mountains, the insert has a greater deformability

F i g. 2 the subject of F i g. 1 must sit partially.

Section, after F i g. 4 the segments are arranged so that

F i g. 3 the expansion according to the invention with open they form a diamond-shaped network. The one another

ner sole, 25 opposing diamond corners are through anchors 8

4 shows the expansion according to FIG. 3 connected to one another in a side view. The successive

and rhombuses are offset from one another as shown at 9

F i g. 5 supports a detail of the invention.

Route expansion. According to FIG. 5 wedges 10 are placed between the

The in Fig. The segment shown in FIG. 1 is curved against the end faces of the successive segments. It is made of concrete and is driven towards the front. In addition, the anchors 8 are so would absorb reinforcement from bending moments. twisted so that the articulations connected to them

F i g. 2 gives a section along the line aa of the points of expansion approaching each other. Through this

F i g. 1 again. The drawing shows that there is an increase in the scope of the

Reinforcement of a bracket 1 and several longitudinal 35 expansion, which are in a compression of the

steels 2 is formed. In addition, there is an additional requirement at the joints B which is noticeable. the

kerschiene 3 provided. It is used for attaching expansion is in this way against the mountains

from loads to the expansion and as an aid to the strained.

Assembly. It may be advisable to use the

On both of its front sides, the segment carries ela- 40 sole at the points shown by special features

statically yielding cushions. They exist according to the anchor 11 to be secured in addition. The backup is used

illustrated embodiment from Flachspanplat- only to fully support the capacity of the expansion

ten. to be able to exploit.

1 sheet of drawings

Claims (4)

1 2 deformability. Therefore, such an expansion is prak-patent claims: table rigid. Relatively difficult forms of 1. Flexible route extension, the concrete arches as segments of the route extension mig and open to the sole or self-contained 5 known. With such an expansion, the is formed, consisting of curved steel pressure peaks are absorbed, which the molded concrete segments, which can destroy their front end stones. The dimensions required for this have elastically resilient supports, but in practice they have a considerable effect which articulations form the expansion, there are difficulties. characterized in that the steel be- io The use of reinforced concrete segments that Clay segments (7), as is known per se, are lozenge longer than shaped stones, is door-shaped, among other things Form a network and that for Aufbrin- Stockausbau, known. In this expansion are the supply a bias against the mountains, the stamp with the cap of the door frame over each opposite rhombic corners connected in stretch - a shell joint. In the cup joint A cork plate rests against one another and can be displaced in the longitudinal direction. The purpose of this is to put things in order are. to make steer resilient. Next to it is an arch conveyor 2. Track expansion according to claim 1, characterized by mig and open to the sole or closed in itself, that the line extension formed on the frontal end from curved steel surfaces the reinforced concrete segments arranged clay segments known, in which the segments end face supports consist of flat chipboard. 20 days also with elastic, flexible pads. 3. Extension of the route according to claims 1 and are permitted to simultaneously use the joint points of the Aus-2, characterized in that the expansion in to represent building. known way by driving in wedges A disadvantage of all previously known types of expansion, between successive segments (7) or that it is not braced by itself with the mountains can also be made against the mountains 25 by mortar. Rather, the expansion must be in everyone can be prestressed. Case must be carefully connected to the mountains. 4. Extension of the route according to one or more If the extension is to be braced with the mountains, of the preceding claims, characterized by this, it must be placed on hydraulic rams, draws that the outside of the reinforced concrete seg- Such an expansion is, however, in general too elements with a friction-reducing edition, 30 expensive. It can therefore only be used in special cases preferably a bitumen paint. is. The invention has for its object to be a compliant route expansion of the initially to create a kind in which, by approaching 35 ter, in the expansion of fixed points, a tension of the expansion with the mountains can be brought about can. The invention relates to a flexible stretch This object is achieved according to the invention by gekenausbau, which is arched and open to the bottom or solves that the reinforced concrete segments, as known per se, is formed closed in itself. consisting of ge 40 form a diamond-shaped network and that to the curvature Reinforced concrete segments, which at their forehead bring a bias against the mountains term end surfaces elastically resilient pads on opposite diamond corners in stretches, which joints form the expansion. longitudinally displaceable against each other For reasons of the strength of the route expansion are. wooden segments are only used in exceptional cases uses. In addition, segments are generally used with the mountain range initially not braced. Will from steel. Then a resilience of the stretch - but then by taking advantage of the by the invention ken expansion through frictional connections ensures the slidability provided by the diamond corners, which are provided at the ends of the segments. approximated differently, i.e. the distances between the diamond corners Such connections are expensive and because of their not diminished from each other, it results in a magnification producible Friction values also technically under the scope of the expansion. These circumferences perfect. They can be avoided if the segment enlargement leads to the generation of a ments are supported on timbers, which are in stretch tension in the expansion segments as soon as they are run lengthways. However, this will create the mountains; The bias is the motive for you achieved a low elastic resilience, because 55 movement of the rock into the hollow space Wood permanently deformed very quickly and then turned in the opposite direction. In practice, the expansion looks like becomes practically rigid. a spring pretensioned against the mountains. A known expansion from steel segments forms such an expansion not only has the advantage that a diamond-shaped network of bars. D <- * r together is in frictional contact with the mountains The end of the segment ends is torsionally rigid. 60 and accordingly an even distribution This is to ensure that the segments are ^{1 of} the pretensioning forces and therefore an equal move against each other or the entire expansion has moderate stress on its segments. The movement device. Mountains must also, before they can enter the cavity Aticli is the use of segments from Verwandert to overcome the bias of the expansion, bundwerkstol'fen not new in mine expansion. She is 65 The subsidence of the ridges and the immigration of the among other things from the use of reinforced concrete joints in such a developed route therefore takes place Tubbings known by lead strips from each other only at a later point in time. In addition, the are separated. However, lead has no elastic pretensioning of the concrete segments, the advantage that the