MONITORING OF DISPLACEMENT ABUTMENTS OF MOTORWAY VIADUCT

The aim of the paper is controlling the behavior of the bridge supports of the motorway viaduct WA-164 on strengthened subsoil using soil-cement columns made in DSM technology. Monitoring of the construction was carried out for a period of 16 months by measuring the settlement and rotation of the structure. The settlements were measured by means of the geodesic precision leveling method. Changes in the rotation of the supports were recorded using a inclinometer sensors installed on the walls of the abutments. For mapping of the construction work, numerical models of span and abutments were performed. The abutment was modeled in computer program SOFiSTiK. The stiffness of subsoil was calibrated with regard to the measured settlement of the abutment on DSM columns. The results of field measurements shows that after backfilling the abutments, it leaned in the embankments direction. This is also confirmed by numerical analysis. Monitoring conducted in 2014 showed that settlement is stabilized, and the measured values are safe and lower than the SLS limit stage. Numerical modeling along with geotechnical and geodetic monitoring has enabled a better understanding of the behavior of the bridge foundation on strengthened subsoil and verify the calculation assumptions taken at the stage of design calculations.

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[1] Detailed design of the road viaduct WD-164 located at km 582+247.98 A4 motorway: "Realization of Building Design, Project realization and tender documents for the construction of A-4 motorway on the section Rzeszow - Jaroslav from km 581+250.00 to km 621+930.00", MP MOSTY Katowice, 2010.

[2] Geological - engineering assessment engineering-geological conditions of the substrate under the projected A4 motorway section Rzeszow - Jaroslaw from
km 581 + 250 to km 621 + 930. Geostandard Sp. z o.o. Wrocław, 2009.

[3] Measuring operate no. GP/02.2014 / II-3926 GEOPRZEM, 21/02/2014.

[4] Report of monitoring settlement viaduct WA-164. Technical and scientific supervision engineering objects on A4, carried out under the investment project entitled.: Construction of A-4 motorway, section Rzeszow - Jarosław - 15.12.2014 r.