Energy and<br/>infrastructure

Energy and
infrastructure

Energy and<br/>infrastructure

Energy and
infrastructure

Energy and<br/>infrastructure

Energy and
infrastructure

Energy and
infrastructure

Image

In more than three decades of experience working on a series of very demanding energy and infrastructure projects, ING-GRAD managed to complete the entire process of energy production in a diverse list of projects.

These are projects of construction, reconstruction, rehabilitation and extension of wind and thermal power plants, bio-powered power plants and infrastructural facilities. At the very end of the energy circle there is a series of gas stations of the largest Croatian oil company INA - industrija nafte d.d.

Work on these projects is complex precisely because of the challenging terrain, which in many cases is difficult to access, and the work includes everything from the construction of access roads and roads to massive concrete.

Energy (28)

Infrastructure (9)

Petrol stations (6)

Energy

In energy and infrastructure projects, we highlight the following works:

Geomechanics and earthworks

Geomechanics and earthworks refer to the construction of reinforced concrete piles that are drilled into the ground and reinforced with special reinforcing baskets or steel profiles that are installed in the wells and filled with concrete. In this way, on soil that is not favourable for foundation, a skeleton structure is made in the ground, which enables the load-bearing capacity of the entire building in the making.

Did you know?

During the restoration of the bridge on the Drava River in Osijek, the caisson foundations of the bridge were repaired by installing reinforced concrete panels - talps, underwater concreting with a concrete mass made according to a special recipe and injecting the foundation soil with micro-concrete.

Construction of reinforced concrete, steel and other structures

The construction of the object can be called its skeleton. The classic and most common is the reinforced concrete construction, while the steel construction is used in the construction of large halls or production facilities because it enables faster and easier construction.

Did you know?

The heat accumulator HEP TE-TO Zagreb is a steel tank with a diameter of 24 m and a shell height of 47.5 to 50.12 m, for which a reinforced concrete base plate with a diameter of 27 m and a thickness of 2 m is built, supported on 69 reinforced concrete piles with a length of 20 m.

Construction of sewage systems

In the construction of sewerage systems, we are talking about so-called linear structures, which differ from the construction of classic construction structures. These are facilities that are continuously developed on the given routes in the most populated areas and include, in addition to the construction of the route itself, the construction of accompanying facilities, gravity and pressure collectors, and the rehabilitation of roads damaged during the works.

Did you know?

The project to expand the sewage network of the city of Poreč included the construction of 64 km of sewage system, gravity and pressure collectors, and road rehabilitation.

Construction of transport infrastructure

When building infrastructural and energy facilities, it is necessary to ensure access to the construction site and the facility itself, so in that case, temporary macadam access roads are built, which are created primarily for the delivery and removal of materials, the flow of equipment and people, and are ultimately arranged as a permanent traffic infrastructure of newly built facilities.

Did you know?

The construction of the Korlat, Lukovac and Zelengrad wind farms was preceded by the routing and construction of several kilometres of access roads on the difficult and demanding terrain of the Dalmatian hinterland.

more than50

energy and infrastructure projects

more than330

MW of renewable energy

Revitalization of the hot water network in the area of ​​the city of Zagreb, Zagreb

Investor
HEP Toplinarstvo d.o.o.

Category
Energy

The project planned the replacement of channel-laid hot water pipelines with ductless pre-insulated hot water pipelines with a total length of 68.5 km and a range of different nominal diameters from DN 20 to DN 800. Theexisting dimensions of the pipelines were retained on the sections planned for revitalization on parts of the route of the existing hot water network CTS of the City of Zagreb. , that is, on parts of hot water mains and distribution networks within the built-up areas of urban settlements of the City of Zagreb: Siget, Sopot, Trnsko, Utrine, Donji grad, Folnegovićevo naselje, Kruge, Vrbik, Savica, Borovje, Sigečica, Gajevo Staglišće, Jarun, Srednjaci, Cvjetno naselje , Trešnjevka and Voltino.

The importance of this project for the City of Zagreb and its residents is best illustrated by the data that HEP Toplinarstvo d.o.o. performs energy activities of production, distribution, and supply of thermal energy in the area of ​​the City of Zagreb and manages a hot water distribution network 227.3 km long.

More than half of the hot water network in the City of Zagreb (56.2%) was built between 1962 and 1995, using the classic method of laying steel pipes in a concrete channel. Such technology is outdated and subject to externalinfluences such as a high level of underground water, possible leakage of water pipes and the penetration of rainwater into concrete channels, which favors the deterioration of pipes and the occurrence of corrosion. The consequence of the previously described problem is the constant growth of heat losses and water replenishment losses, as well as a large number of emergency interventions in the last few years.

The implementation of this project will result in a reduction of heat losses by 27.94%, a reduction of water replenishment losses by 47.36% and a reduction of the number of emergency interventions on the reconstructed sections of the spring by 90% compared to the state before reconstruction. The reduction of heat losses will result in less production of heat energy in power plants, and thus the reduction of emissions of harmful substances into the environment (CO2, NO2, SO2 and PM10), which will have a favorable effect on society.

The project is co-financed by the European Union.

 

hep_01 hep_02 hep_03 hep_04 hep_05 hep_06 hep_07 hep_08 hep_09 hep_10 hep_11

  2. Home
  3. What we do
  4. Energy and infrastructure
  5. Energy
  6. Revitalization of the hot water network in the area of ​​the city of Zagreb, Zagreb
Image

Company

ING-GRAD d.d.

Kalinovica 3/IV
10 000 Zagreb, Croatia

Contacts

+385 1 / 30 33 000

+385 1 / 30 33 010

ing-grad@ing-grad.hr

ING-GRAD d.d. © 2025, All rights reserved. | Privacy policy | developed by Prvi Program
Save
Cookies user preferences
We use cookies to ensure you to get the best experience on our website. If you decline the use of cookies, this website may not function as expected.
Accept all
Decline all
Read more
Nužno potrebni kolačići
Ti su kolačići neophodni za funkcioniranje web-mjesta i ne mogu se isključiti u našim sustavima. Obično se postavljaju samo kao odgovor na akcije koje ste izvršili, a kojima se upućuje zahtjev za usluge, primjerice postavljanje preferenci za privatnost, odjavljivanje ili ispunjavanje obrasca. Te kolačiće možete blokirati u pregledniku ili postaviti da vas preglednik o njima upozorava, no u tom slučaju određeni dijelovi web-mjesta možda neće raditi.
www.ing-grad.hr
Accept
Decline
Analytics
Tools used to analyze the data to measure the effectiveness of a website and to understand how it works.
Google Analytics
Accept
Decline