SU1219703A1 - Arrangement for preventing tipping-over of beam structure in mounting - Google Patents

Description

The invention relates to bridge construction and can be used when installing beams reinforced diaphragm bridge span structures.

The purpose of the invention is to provide the possibility of using the device when installing beams of reinforced concrete diaphragm spans.

FIG. I shows a device, longitudinal section, of a diaphragm superstructure; in fig. 2 is a section A-A in FIG. 1.

A device for preventing tilting of the beam 1 of the reinforced concrete span of the bridge during installation includes a hinged upper support and a lower support unit, secured with a supporting diaphragm 5 from the corresponding side of the wall of the beam, with a support shoe 4 and a support 4.

The upper support assembly contains an upper bracket 6, a lateral supporting diaphragm 5 in its upper part and installed relative to this diaphragm from the side of the span with a gap of 7 constant width, and from the end of the beam 1 - with a gap 8 that abuts downwards in the shape a wedge, and friction gaskets of rectangular 9 and trapezoidal 10 sections, placed respectively longitudinally-movable and vertical-feed in a gap 7 of constant width and in a gap 8, wider downwards, and attached with screws, respectively, by means of clamping screws 11 to the upper bracket 6 and through the hinge 12 to the upper end of the brace 2.

The lower support unit includes a bracket 13, enclosing the porous diaphragm 5 at the bottom and fixed with a gap of a constant height along the width, and friction pads 14 and 15 of rectangular section accommodated in them. Friction gasket 15 from end of beam 1; fixed on the bottom bracket 13 rigidly, and the gasket 14 from the side of the flight is fixed on this bracket longitudinally-movably by means of clamping screws 16.

T ha 3, made perforated, attached at one end by means of a hinge 17 to the bottom bracket 13, and the other

by means of a hinge 18 to the support shoe 4.

Friction pads 9, 10, 14, 15, interacting with the supporting diaphragm 5 and

retaining due to the forces of friction beams 1 against tipping, can be made of composite, for example, steel concrete. The device works as follows. Vertical support reaction from the jack

19, mounted on the support 20 under the support shoe 4, is transmitted to this shoe, and then unfolded into a tensile force in horizontal tension 3 and compressive in brace 2. Horizontal force in tension 3 is sensed by the lower support node, transmitting it to the diaphragm 5 through a friction gasket 14. The compressive force in spit 2 is transmitted to the trapezoidal friction strip 10 in the form of

a horizontal component which presses the wedge-shaped friction gasket 10 to the width of the 10 diaphragm of the support diaphragm 5 and which mixes this gasket up the gap 8, communicating the necessary adhesion force

with diaphragm 5,

The vertical component force in the strut is transmitted to the inner wedge face of the upper bracket 6, which transmits this force through the bracket body 6, the clamping screws 11 and the friction gasket 9 to the reverse face of the supporting diaphragm. Thus, all the components of the supporting reaction are perceived by the supporting diaphragm, which does not pose a danger to the beam, since the diaphragm is a sufficiently reinforced element of the superstructure. At the same time, there is enough space between the support diaphragm and the end of the beam to allow installation of support parts 21 under the bottom edge of the beam.

The application of the proposed device makes it possible to mount beams of reinforced concrete diaphragm spans with fastening the device on sufficiently mosh diaphragms, and not on console blocks of bklok, reinforced only from above and not, reproducible, therefore, loads from below without

damage to the beam.

AND

23/5

hr

: 3kaz 1240/39 Circulation 514Subscribed

SHIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch nnii Patent, Uzhgorod, st. Project, 4

./

Claims (1)

DEVICE FOR PREVENTING TIPPING BEAMS OF SPAN STRUCTURE AT INSTALLATION, including the upper support pivotally and equipped with the support shoe, the lower support units, mounted on the corresponding side of the beam wall, characterized in that, in order to enable the device to be used when mounting reinforced concrete beam beams , the upper support node is made in the form of an upper bracket, laterally surrounding the support _t diaphragm in its upper part and installed relative to the diaphragm on the span side with a gap of constant height in width, and on the side of the beam end, with a gap broadening downwards, and friction linings of rectangular and trapezoidal sections, respectively longitudinally movable and vertically movable in a gap of constant width and in a gap broadening down, and attached by clamping screws to the upper bracket and the hinge to the upper end of the strut, and the lower support node is made in the form. a lower bracket enclosing the supporting diaphragm from below and installed with a gap of constant width width, and friction bearings of rectangular section placed in them, moreover, the friction gasket on the side of the beam end is rigidly mounted on the lower bracket, and the gasket on the span side is longitudinally mounted on this bracket movably; prizhim- ^- GOVERNMENTAL screws, the rod is pivotally attached at one end to the bottom bracket by the end of the beam and the other end. to the support shoe. SU. ... 1219703>