DE2056999A1 - Teaching for the production of a concrete bridge beam excretion from 2039Π8 - Google Patents

Description

HANS-JOACHIM KANTNER

(IMMEDIATELY NEAR THE EXHIBITION CENTER AND UNIVERSITY)

PATENT Attorney D1PL.-INQ. H.-J. KANTNER. * TELEPHONE: (0411) -774604

FRANKFURT AM MAIN, QEORQ-VOIQT-STRASSE 17 TELE (/ RAMM: KANTNERPATENTE FRANKFURTMAIN

N. V. Nederlandse Spanbeton Maatschappij

Teaching for the production of a concrete bridge beam

The invention relates to a teaching for the production of prefabricated Concrete bridge girder.

In the case of the known bridge beams, the ends of the supports are wider formed as the! part between the end regions, while Furthermore, a flange is arranged at both ends of the web, so that the cross section is approximately I-shaped. the End parts have the widening for the purpose of absorbing transverse forces and are often called hammer ends,

The disadvantage of these known bars, from a manufacturing point of view, is their unfavorable shape. Different gauges have to be used for the production of beams of different lengths and / or different heights. Accordingly, a large number of lessons must be _o kept in stock and must etellungflverfahrens repeated teachings be changed during the production ^. ro It is possible to build gauges from parts, with

o> dependance of the length and the height of the to be produced

can be. However, this procedure is complicated and expensive.

The invention is intended to provide a teaching for the production of prefabricated concrete beams which allows them to be produced more quickly and cost-effectively than the known methods with less effort. The aim is an established means of the inventive teaching beams combined with the same end to bulk concrete · "pressure laminates the same mechanical properties have ψ as the known beam.

The invention is characterized in that such a teaching has a clear cross-section in the form of an inverted one T, in which the side surfaces forming the web of the beam have inwardly directed longitudinal ribs, and that it can be closed by at least one head bulkhead movable in the longitudinal direction.

Advantageously, in an inventive development, the clear cross section can have the same shape over its entire length. According to a further advantageous port map ^ tion of the invention can be the clear distance between the The web of the beam-forming side surfaces must be almost constant over the entire cross-sectional length.

By inventing it becomes complicated without applying the familiar Lessons possible to manufacture concrete bridge girders inexpensively and quickly, which in terms of their use did have the same qualities as previously known Bar. By moving one of the head bulkheads, the length of the beam can be varied, while the filling level of the doctrine determines the height of the beam, due to the presence of the longitudinal ribs in the doctrine arise in the , Bars a number of spaced longitudinal grooves

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in the side surfaces of the web of the inverted T. The so-called notches affect the strength of the beam only to a small extent and serve as supports for the cladding plates for those to be poured onto the beams Print layer. A bar produced in such a teaching thus has regardless of the selected height on the a notch.

The invention is explained in more detail with reference to the drawing.

Figure 1 shows a teaching according to the invention for the production of a concrete beam; and

Figure 2 shows a section of part of a bridge, which has concrete beams, which by means of the invention Teaching are made.

The beam 1 is in the shape of an inverted T with a web 2 and a flange 3. Such a beam becomes in a teaching with a part 4 · in the form of an inverted one T shaped, this part 4 having longitudinal ribs 5 on its side walls delimiting or forming the web and has at least one movable head bulkhead 6. By moving the head bulkhead 6 in the longitudinal direction the length of the bar 1 can be varied.

By filling the gauge to the desired size, the height of the bar can be varied. Due to the longitudinal ribs 5, several longitudinal grooves are in fact in the web of the beam or notches are formed, but these have little effect on the strength of the beam. The notch is used later when using the prefabricated beam to support cladding panels 7 of the so-called "lost type" for pouring the printing layer 8, the connection between the beams 2 and the printing layer 8 being

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resistance between the same and through a hairpin-shaped part 9 of the steel reinforcement protruding from the beam 1 the beam 1 can be manufactured · Appropriately, can be particularly advantageous to achieve beams The shape of the clear cross-section of such a teaching according to the invention is four to five times the clear distance the clearance between the side walls forming the web 2 of the beam 1 and the lateral end faces of the flange 3 of the beam 1 have forming side walls.

109830/0206

Claims (1)

Teaching for the production of a bridge beam, characterized in that its clear cross-section has an inverted T-shape, in which the side surfaces forming the stem (2) of the beam (1) have inwardly directed longitudinal ribs (5), and that they are through at least one head bulkhead (6) movable in the longitudinal direction can be closed. 2 ·) Teaching according to claim * t, characterized in that its clear cross-section has the same shape over its entire length. 3 ·) Teaching according to claim 1 or 2, characterized in that its clear distance between the side surfaces forming the web (2) of the beam (1) is almost constant over the entire cross-sectional length. 4 ··) Teaching according to one of the preceding claims, characterized in that its clear cross-section has a clear distance corresponding to four to five times the clear area of the side walls forming the web (2) of the beam (t) between the lateral end faces of the flange ( 3) of the beam (1) has forming side walls Patent attorney 109830/0206 Blank page