SU1511353A1 - Multiple-span prestressed beam system - Google Patents

Abstract

The invention relates to construction and is intended for use in multi-span beam systems. The purpose of the invention is to simplify installation. The multi-span beam pre-tensioned system contains beams, reinforcement rods 2 installed in their body, two pairs of L-shaped unequal arms 3 and 4. Levers 3 and 4 are installed with short arms into the slots 5 in the beam and have stepped bevels at the ends of the long arms of the arms for fixing when mounted in the resulting locks. The long arms of levers 3 and 4 are mounted at an obtuse angle to the longitudinal axis of the beam 1. At the ends of the beam, additional grooves are made to accommodate in them when mounting the ends of the long arms of the arms of adjacent beams and provided with wedges 8 placed in the gap between the end wall of the slots 5 and the levers 3 and 4. 14 Il.

Description

FIG. 2

The invention relates to construction and is intended for use in multi-span beam systems.

The purpose of the invention is to simplify installation.

ten

25

FIG. 1 shows a span structure, top view, FIG. 2, section A-A in FIG. one; FIG. 3 is a section BB in FIG. 1; FIG. 4 is a section B-B in FIG. 1; Fig, 5 is a section of GG in Fig, 2; fig 6 is a section d-d of fig 2; FIG. 7 shows the initial position of mounted adjacent structures} in FIG. 8, the intermediate position of adjacent adjacent spans; FIG. 9 shows the final position of the adjacent adjacent 20 span structures; FIG. 10 shows a span for an extreme span; FIG. 11 is a multi-span beam system, a general view; FIG. 12 is a design diagram of the proposed span; Fig. 13 is a section E-E of Fig. 11;; Fig. 14 shows a lever joint with a span.

A multi-span beam pre-stressed system includes beams 1 interconnected in length, In each beam, in a plot of moments. This is placed in the channels of prestressed reinforcement 2, Beam 1 at the ends is equipped with at least one 35 T-shaped lever 3 and 4, which are installed in the grooves 5 with a short arm, Levers are made with stepped bevels at the ends of the long arms to be fixed during installation into the deputy 40 how. Strained reinforcement is placed in the channels of the span, and passed through the long arms of levers 3 and 4 and secured in the latter.

The length of the short arm of each lever 3 and 4 depends on the height of the wool 9, and the height of this arm can be taken from zero. The beam has embedded parts 10 with which the embedded parts 1 1 of the short arms of the arms contact

The Montana girder system is manufactured as follows.

The 5 L-shaped, non-equalized levers 3 and 4, pre-installed in the sump 5, connected to the reinforcement rods, when lifting with their long ends, turn into the corresponding Gaza 6 of the adjacent beam until the locks are fixed (stepped bevels with tall 7 ), When beam I is lowered, the levers are rotated relative to the hinges created by the abutment of the ends of the short arms of levers 3 and 4 into the angle of the grooves 5, as a result of which the reinforcement bars gain tension and the system itself is pre-tensioned by its own weight that levers, whose long shoulders are fixed in locks. After that, the grooves and joints of the connectors

thirty

Claims (1)

beams are monolithic with concrete. Invention Formula A multi-span beam prestressed system, including beams with tension reinforcement placed in channels over a moment plot, is connected by itself, meaning that, with the aim of simplifying installation, each beam is made at its ends with at least one L-shaped an unequal arm, installed in one of the long arms of the levers, is installed 45 calls of the beam with a short shoulder with an image five 0 . 50 grades of an obtuse angle between the long arm of the lever and the longitudinal axis of the beam. The length of the short arm of each lever 3 and 4 depends on the height of the thread 9, and the height of this arm can be set to zero. The beam has embedded parts 10, which are in contact with embedded parts 1 1 short arms of levers, The Montana girder system is manufactured as follows. Previously installed 5 grooves in the grooves, 1 L-shaped non-equalized levers 3 and 4, connected to reinforcing bars, when lifting with long ends, are fitted into the corresponding Gazy 6 of the adjacent beam until the locks are locked (stepped bevels with projections 7), When beam I is lowered, the levers are rotated relative to the hinges created by the abutment of the ends of the short arms of levers 3 and 4 into the corner of the grooves 5, as a result of which the reinforcement bars gain tension, and the system itself is pre-tensioned by its own weight. ota arms, long arms that are locked in the castle. After that, the grooves and joints of the connectors 0 beams are monolithic with concrete. Invention Formula A multi-span beam prestressed system, including beams with tension reinforcement placed in channels over a moment plot, is connected by itself, meaning that, with the aim of simplifying installation, each beam is made at its ends with at least one L-shaped unequal arm mounted in one of the pa at an obtuse angle to the longitudinal axis of the beam 1, Additional grooves 6 are made at the ends of the beams for accommodating the ends of the long arms in them levers of adjacent beams, In addition, Q and the reinforcement of the beam is passed through the grooves, there are protrusions 7 for engaging the stepped bevels of the levers. In addition, the beam is equipped with wedges 8 placed in the gap between the end wall of the grooves 5 and the angles of the levers 3 and. 55 4, in order to achieve the required velidpin shoulders of the levers and fastened at their ends, the beam is equipped with wedges installed in the slots between the arms and the beam, and the long / shoulders with the lever of one beam are installed in the grooves of the beam adjacent to it. between the long arm of the lever and the longitudinal axis of the span of the obtuse angle, and has stepped bevels on the ends of the long arm  and the beam reinforcement is passed through The shoulders of the arms are fixed and fixed at their ends, while the beam is equipped with wedges installed in the slots between the arms and the beam, and the long / shoulders with the lever of one beam are installed in the slots of the beam adjacent to it. t 3-B .1 / Phie L 6 1 // Clll 5 fie. one AT FS / e.Z 6 Lbdj five 6 7 fiv.8 ld ooh j / f jiyyy fi & .e X. / vAv f t FIG. 12 dzig.yu and 1 F fug. fJ -7 ft ////// 3 h - : z &