SU639989A1 - Method of mounting arched top road bridge - Google Patents

Description

the honeycombs of their rise, and the semi -ars are combined.

FIG. 1 shows the moment of raising the semi -ars; in fig. 2 - the combination of the plate of the passageway / key part and the bearing elements of the supra-articular structure of each of the semi-fuels with the subsequent descent of the semi-fuels; pas figs. 3 - union of converging hemispherd ends.

The method of mounting an arched bridge consists in installing two semi -ars / combined by posts 2 with load-bearing elements of the roof construction and a slab of the carriageway 3, using temporary equipment 4. Before combining the half-joints / and the bearing elements of the sublevel building with the road block 5 by means of locking blocks 5, 6 in the anchors 7 of the shore abutments secure the passage: the third part 3. Thereafter, with the help of jacks mounted on the rotary supports 4, the semi-armatures are raised / and the locking blocks 5 of the supporting elements of the nadarochny join together Structures of and the roadway slabs each of 3 ioluarok 1 together.

Then the semi-markers are lowered / with the help of jacks with the subsequent combination of the converging ends of the semi-fumes by the closing blocks 6.

The bridge pre-voltage is as follows.

After the installation of the semi-aisles /, joined by the uprights 2 with the padarochny elements and the slab of the carriageway 3, the temporary supports 4 are secured with the elements of the arch structure and the slab of the carriageway 3 in the anchors 7 of the abutments. At the same time, each of the semi-rollers / in the process of installation works according to the grating scheme, which makes it possible to create, with separate lifting of each of the helixes / with the help of jacks 8, installed on temporary supports 4, tensile forces in the semi-joints /, opposite in sign to the operating compressive forces in the arch. At the same time, during the ascent, the reinforced concrete slab of the roadway and the carriers (elements of the super-articulated structure) are crimped.

After this, the locking elements 5 combine the supporting elements of the adarochny building and the slab of the carriageway 3 with the subsequent lowering of 8 semi-arches / with the help of jacks of the carriageway 3 by an amount less than the pre-elevation, with the aim of more efficiently removing the thrust transmitted by the arch / on the foundations. In the process of lowering, there is an additional compression of the elements of the supra-arch span and the plate of the carriageway 3, some oelaksapi obtained by

by raising the tensile force in the semi-aerials /, the thrust between the joint slabs of the carriageway 3 half-folds / and the elements of the super-arc structure and the slab of the carriageway 5 and the thrust part of the arms is carried out by redistribution.

After alignment of the displacement of the jacks 8 of the pre-stressing of the semi-armatures / bearing elements of the overlay structure and the plate of the carriageway 3, the converging ends of the semi-blocks / end blocks 6 are joined.

Obtained as a result of the specified sequence of installation operations.

prestressing diagram

Elemepta arch bridge is characterized by

following features.

A significant part of the compressive force from its own weight and in the further from temporary loads is removed due to the preliminary stretching of the semi-armatures closed in the form of separate armrests.

and then redistributing during operation the stresses between the arch / and the slab of the carriageway 3, transmitting the force from the part of the total thrust to the anchors 7. At the same time, the stretched sections of plt of the carriageway 5, made of reinforced concrete, will be unloaded, which will make it possible to adopt a more compact the cross section of the latter, to avoid the appearance of stretching

stress and increase its crack resistance.

The application of the proposed method will reduce the consumption of materials for the bridge by 7–15% without special taps and other tensioning elements due to the creation of the arch and slab of the carriageway, which is predominantly made of reinforced concrete, and clearing the abutments of the bridge.

Claims (2)

Invention Formula A method of mounting an arched bridge with a ride on top, including installing semi-coils on temporary supports, installing elements of the nadarochny structure and roadway plate on semiarks and coastal foundations, combining semi-arrays and combining elements of the nadaroic structure and roadway plate, characterized in that, in order to reduce material intensity bridge constructions by their preliminary stresses, before combining the semi-boils, anchor the elements of the supra-articular structure and the roadway slab on the banks and raise the semi-markers with jacks, combine the elements of the supra-sochi-hydrochloroflow, J TnnOUTJCr TJ T7 ПТ; гттг. then lower semi-archs by an amount less than the height of their rise. Sources of information taken into account during the examination: 5 1. German patent number 539580, cl. 19 D 21/00, published 1931. 2. “Zdakov mostarna vitkovice hutni montage, Ostrava, 1965. 4./A,4V. (Pfjs, 2 FIG. 3