PSI - Issue 13

Vera Vujović / Procedia Structural Integrity 13 (2018) 1901 – 1907 Vera Vujovi ć / Structural Integrity Procedia 00 (2018) 000–000

1904

4

. Fig. 2. Designer and Contractor on the Mala Rijeka Bridge.

2.2. Main rehabilitation project The "Mala Rijeka" bridge requires complex and well-planned and organized maintenance, continual monitoring of soil and bridge (treated separately by parts of the structure - monitoring of steel and concrete). The rehabilitation project with anti-corrosion protection started with the main inspection carried out in the period from 08.-12.12.2008. (RIoM (ŽICG), Faculty of Civil Engineering, Podgorica and Transport Institute CIP Belgrade). Based on the results of the inspection and the accompanying assessment, this project was submitted for financing from EIB funds (including the remaining 15 steel bridges). Based on several years of research, the existing project task was improved in cooperation with the RIoM (ZICG) engineers and PIU, and served as the basis for the development of tendering documentation (design and revision). The project task required special attention to be paid to the seismic control of the structure, to make the preliminary design of the monitoring and maintenance design. The corrosion protection is worsened, while the construction of the bridge is in a relatively good condition, so that in the procurement plan, the bridge is on the second priority list compared to the 15 steel bridges. After the inspection and testing carried out in 2014. by the consortium iC consulent Ziviltechniker GesmbH, DB Engineering and Mostprojekt, the Main Rehabilitation design (with anticorrosion protection) was developed in early 2015. The main design of investment maintenance consists of 12 books: General documentation; Static calculation; Graphic documentation; Protection against corrosion; Works on the superstructure; Geotechnical study; Study on Environmental Impact Assessment of the Bridge; Geodetic observations; Fire protection design; Technical specifications, consolidated BoQ; Preliminary design for bridge lighting (functional and decorative) and bridge maintenance design, test load program, preliminary design of the monitoring. 3. Construction The difficult configuration of the terrain, complexity and seriousness of the project required detailed and careful preparation, which included the construction of numerous auxiliary facilities and the use of special equipment. For the needs of the transport of construction materials and equipment, produced cable crane of a range of 630 meters with a capacity of 12 tons was built. Build 3,5 km access paths and an auxiliary crane of 650 meters were built. For the safer movement of workers and the transport of concrete from one shore to another 70 meters downstream from today's bridge, a hanging bridge span of 100 meters, 80 m high above the riverbed, was built. From 1 to 6 pillar, 6 km of paths were built. During the construction of the bridge, the concrete was transported by means of transport pumps, and at the same time the coating and reinforcement bars were transported with the "KLETER" crane and cable crane. Steel constructions were mounted using a cable crane using cantilever erection technique. More than 70 organizations and companies from the regional environment participated in the construction of the bridge. The installation of the steel grid of the bridge was carried out in a direction free from the shore to the center by a cable crane. By completing the assembly in both directions, the bridge steel construction of the V porthole is around the pillar no. 5 is rotated and placed in its definitive position on column No. 6.

Table 2. Construction

Item

Description

Contractor Deadline

GP Mostogradnja

since April 1969 to September 1972

Number of workers:

200-250 per day