DE1084652B - Anchoring exposed fixed point pipes of penstocks - Google Patents

Description

GERMAN

To form the fixed points of pressure pipelines for hydropower plants or the like. So far, mostly a pipe provided with thrust rings poured into a concrete block. Because on the one hand, as a result of the current Improvement of the steel grades used due to the increase in the permissible stresses in the Pipe material the fixed point concrete can no longer follow the expansion of the pipe and on the other hand For reasons of safety and corrosion resistance, the aim is to include the fixed point pipes on all sides to arrange accessible, one has recently switched to exposed fixed point pipes.

It is already known to encase the fixed point pipe with a sheet steel hood which is fastened to the concrete foundation of the fixed point with the aid of anchor bolts. Apart from the inaccessibility of the space between the sheet steel hood and the pressure pipe, there is the disadvantage that the anchor bolts only allow slight position corrections when installing the manifold, that the longitudinal forces in the pipeline can only be dissipated unevenly and unfavorably via the anchor bolt, which is because of the construction of the mechanically machined parts is relatively expensive and that the anchor bolts arranged on both sides of the fixed-point pipe make it necessary to increase the distance between pressure pipes laid in parallel. In the solution of the hood into individual, not mixed by means of anchor bolts to the concrete foundation fixed bracket brings no substantial \ ^f IMPROVING with it. In another known construction, the fixed point tube is provided with a main bearing ring in the middle and an auxiliary bearing ring at each end. The main bearing ring is through struts, the anchoring

exposed fixed point pipes
of penstocks

Applicant:

United Austrian Iron

and Stahlwerke Aktiengesellschaft,

Linz / Danube (Austria)

Representative: Dipl.-Ing. H. Neureiter, patent attorney,
Nuremberg, Pirkheimer Str. 94

Claimed priority:
Austria, September 14, 1957

Dipl.-Ing. Georg Feder, Linz / Danube (Austria),
has been named as the inventor

is which the longitudinal forces occurring in the pipeline into the concrete body via loops or base plates of the fixed point, and is mounted in the support rings so that it can be moved and fixed. The support rings can have a T-shaped or box-shaped or any cross section. the Forces or force components acting perpendicular to the concrete body are controlled by the belts of the support rings transferred into the concrete body, with

are cast in the concrete body of the fixed point and no measure due to the closed loop shape show better adhesion, measurements required to improve adhesion anchored. The disadvantage here is the local longitudinal force. are and the possibility is given. the concrete introduction at the junction of the struts, close the softening through the loop as if through an eyelet the construction against bending around the vertebrae, so that an absolutely reliable anchorage kalachse and the need for a lot of welding work. 40 is achieved. In addition, this type of purpose allows According to the invention, the elimination of this anchoring is an arbitrary shifting of the fixed point deficiencies and the creation of a fixed point pipe during assembly so that it can be set up, Anchoring is a particularly simple and inexpensive means of checking if several parallel pipes are to be laid Structure has a good aesthetic effect, one possible, the distance between the individual fixed point pipes absolutely reliable anchoring of the exposed 45 is to be reduced to a minimum, since the loop disturbance

Fixed point pipes guaranteed and the possibility offers to move the fixed-point tube unrestrictedly during assembly for setting up.

The anchoring in accordance with the nomination is characterized by migen belts of the fixed point pipes of neighboring Do not string a special concrete body between each other require.

The loop-shaped anchorages can also

essentially in that the belts of the opening 5 ° are pretensioned to the unfavorable effects extended down into the concrete body, which are longer anchors due to stretching and there form a closed loop and
that borrowed if the fixed point pipe with longitudinal

vertical aprons running in the direction

COPY

arise to avoid.

The material is usually used with the full, permissible voltage. Dn the concrete

BATH ORIGINAL

inert parts can thereby detach mcIi from the concrete, consists the risk that moisture will penetrate into the resulting gap and cause corrosion leads. To eliminate this risk, the appointment the concrete surface is provided with grooves at the entry points of the metal parts with a plastic permanent mass are puttied.

Since the soffit pressure on the concrete suddenly drops to zero at the edge of the loops, this occurs in the concrete Stress peaks that can lead to cracks. Finally, to avoid this, the parts are the Loop-shaped anchors that exert pressure on the concrete reveal, beveled at the edges.

In the drawing, the subject matter of the invention is shown, for example, namely shows

1 shows a fixed point anchoring in side view, FIG. 2 in section along the line H-II in FIG. 1 and

3 and 4 are cross-sections along the lines IH-III and IV-IV of FIG. 1.

1 with the fixed point tube is referred to, which at its two ends in support rings 2 with, for example box-shaped cross-section is held. The straps 3 of the bearing rings 2 are down in the concrete body 4 is extended and there form a closed loop. To transfer the in the Forces or force components occurring in the longitudinal direction of the pipeline are shown on the fixed point pipe 1 vertical. Aprons 5 welded on, the transfer into the concrete body also taking place through loops 6, 7. The one indicated in phantom in Fig. 1 Reinforcing steels 9 engage in the loops like a chain link in another, so that a absolutely reliable anchorage is achieved. The in the concrete body 4 for the use of the anchoring parts Recessed cavities are of course filled with concrete after assembly.

Claims (5)

Patent claims: 1. Anchoring exposed fixed point pipes of pressure pipelines, with anchored Auflagerririge are provided at the ends of the Festpunktsrohrc in the depth of the fixed point, characterized in that the belts (3) of the support rings (2) are extended down into the concrete body (4) and there form a closed loop and that, if necessary, the fixed point pipe (1) is provided with longitudinally extending, vertical aprons (5) which transmit the longitudinal forces occurring in the pipeline via loops (6, 7) or clamping plates into the concrete body of the fixed point, "and is mounted displaceably and fixable in the bearing rings. 2. Anchoring according to claim 1, characterized in that that the bearing rings (2) have a T-shaped or box-shaped cross-section. 3. Anchoring according to claim 1 or 2, characterized in that the loop-shaped Anchors (3 or 6, 7) are prestressed. 4. Anchoring according to one of claims 1 to 3, characterized in that the parts of the loop-shaped anchors (3 or 6, 7) that exert pressure on the concrete, bevelled at the edges. 5. Anchoring according to one of claims 1 to 4, characterized in that the concrete surface has grooves at the entry points of the metal parts, which remain plastic with a Mass are cemented. Considered publications: A. Schocklitsch, "Handbuch des Wasserbaues", P. 717, Springer-Verlag, Vienna 1952; Adolf Ludin, "Wasserkraftanlagen", p. 282, first Half, reference library for civil engineers, Berlin, 1934, Juiius Springer publishing house. 1 sheet of drawings COPY BAD ORIGINAL © 009 548/166 6.60