Dismantling of shale plant buildings.
As part of the project, the company’s specialists dismantled buildings and structures, as well as foundations and utilities on the territory of the compressor shop of “Slantsy” Plant in the Leningrad Region.
40 structures were dismantled on the territory, including such complex objects as:
1. Reinforced concrete chimneys with a height of 110 meters,
2. Overpasses and galleries located above existing gas pipelines and highways
3. High-rise industrial buildings (up to 40 meters)
4. Underground reservoirs and containers containing waste from the processing of oil shale
5. Needle coke warehouse
Despite the fact that the building has already been decommissioned, the Customer did not receive a demolition permit for some of the buildings, and alternative uses of the territory were considered. In this regard, it was necessary to preserve the existing communications and not damage the nearby buildings. In this regard, the company’s specialists performed manual cut-off from neighboring buildings and took additional measures to protect the pipelines.
Production shops with kilns had a height of 30-40 meters. Their dismantling was carried out with the use of demolition excavators and was carried out on separate axes.
One of the most difficult tasks facing Crushmash Group was the dismantling of four reinforced concrete chimneys with a height of 110 meters on the territory of the existing plant. For determining the technical condition and reliability of the structures, Crushmash’s employees conducted a comprehensive survey of them. As a result of the analysis, it was revealed that the reinforced concrete chimneys are in a critical condition, and they cannot be disassembled in the traditional way. Then it was decided to use the technology of directional dumping of large fragments.
The weight of the dismantled fragments was estimated to determine their seismic impact on the preserved buildings, and zones of well-preserved concrete were determined in each of the four reinforced concrete pipes. The largest discarded fragment of the chimney had a height of about 50 meters and weighed more than 380 tons. To ensure safety when dropping such large elements, special trenches were dug. After lowering the height of the pipe to 30 meters, the works were carried out in a mechanized way.
According to the same principle, the dismantling of overpasses and inclined galleries was carried out. Due to the fact that they passed over the road and the existing communications – as well as because some of them were in disrepair – the works were carried out simultaneously by mechanized means and industrial climbers.
Reinforced concrete, concrete, and brick were completely recycled and used to fill underground chambers, channels, wells, and level the terrain on the construction site. The oil-containing waste was pumped out and transported to a special landfill.
