Repair and maintenance of highway bridges. (1984)

Freeway.

Viaduct over the road.

The bridge over the ravine.

Bridge supports and connections.

The slopes of the bridge, covered with tiles.

Bridge over the river.

Deformations in the internal diaphragms of the bridge floors.

View of the river and the bridge above it.

Destruction of bridge floors.

The destroyed fences of the bridge.

Plants grow in the seams between the floors, which destroy the floors themselves with their root system.

The constant impact of water on the bridge floors leads to concrete leaching.

Water seeps through the insulation onto the supporting structures.

White growths and spots are harbingers of the loss of strength of the structure.

The most common deformations: sinks and chips in concrete, exposed and rusting fittings.

Damaged deformation seam.

Cartoon with an explanation of the work of the deformation seam.

Deformation seam on the surface of the bridge.

Pits and cracks on the surface of the bridge.

Examples of damage to the curb and fences of the bridge.

An overgrown riverbed in a floodplain span leads to a rise in the river level in spring.

The river washes away the bridge supports, destroys cones and road embankments.

Alternating frames with destroyed bridges.

A team of bridge repairmen is approaching the bridge.

All damage to a particular bridge is detected.

Thorough inspection and fixing of damages.

A worker paints the curb and railings of the bridge, cleans dirt from the surface of the bridge and inside the drainage pipes.

It is necessary to clean the slopes of bridges from plants.

The watering machine washes the surface of the bridge.

Testing of bridges and overpasses.

Static load tests.

Cars with cargo are being driven onto the bridge.

Devices are installed on the inner surface of the floors

to check the condition of the structure.

Measurement of internal tension of bridge floors with a strain gauge.

Measurement of the degree of deflection of the bridge under load by the Maximov deflection meter.

Such an important indicator as the deflection of the bridge is duplicated visually with the help of levelers.

The vibrations of the bridge are measured by a Geiger device.

Laboratory for the development of new methods of bridge repair.

New materials are being developed.

Testing of new polymer repair compounds.

For example, latex cement concretes and mortars, repair compounds based on colloidal cement glue and epoxy resins.

The method of waterproofing repair using polymers is successfully applied.

A cartoon explaining the operation of this method.

Deformation seam.

Installation of new edges during the average repair.

In the area of the seam, a cutting is made and filled with a concrete mixture.

View of the repaired seam.

Road links perform bridge maintenance and maintenance work.

Repair of slopes.

Surface cleaning and repair.

A machine for cleaning concrete surfaces.

Cleaning of the concrete surface.

Then a cement-sand mortar is supplied under pressure.

It turns out a strong and durable coating.

Repaired bridge.

Alternating frames with bridges and viaducts.