STRUCTURAL REPAIR, WATERPROOFING AND PROTECTION OF FOUNDATIONS AND PILARS IN RANDE BRIGE WITH DRIZORO® PRODUCTS
Freudenstein, S. Technical University of Munich, Chair and Institute of Road, Railway and Airfield Construction, Munich, Germany
Alitinform №2 (55) 2019 г. 64-71 p.
Highly loaded concrete pavements in industrial areas such as container-terminals require the special design and dimensioning of concrete structures. These areas can be managed with gantry cranes to lift the containers from rail to road and vice versa or with heavy reach stackers. Those reach stackers are capable of having axle loads of more than 120 tons, which are distributed over four wheels with high contact pressure between them and the concrete pavement. For storage, the containers are placed closely together and stacked in three, four or maybe five layers, even when fully loaded. In extreme situations, up to four corners are directly next to each other. Additionally, horizontal wind pressure increases the indirect vertical forces at the container corners. The combination of these loading conditions induces high vertical loads at the support points of the containers.
Furthermore, the concrete surface has to fulfil special requirements. Due to the fact that the containers have to be stacked above each other, the maximum incline of the storage area is limited to 0.5 %. Additionally shear forces can be caused by pushing the containers in a horizontal direction. This may be critical for the durability of the concrete in the joint area.
Therefore, highly loaded container terminals are designated to be constructed in concrete structures, which can generally be compared to airfield design.
A group of specialists with experience in concrete road construction and experts from railway companies are working on a document in order to specify requirements and give guidelines for the construction of these heavy loaded areas. This includes the dimensioning of standard loading situations and construction methods. This document is expected to be published in 2018.
concrete road construction, container terminals, heavy axle-load, combined traffic, dimensioning