J. Kawalec

Geotechnical Solutions for Linear Transport Infrastructure in Mining Areas

Design and construction of linear structures for transport like road or railway lines in areas with active or historical deep mining operations is always challenging due to various additional influential geotechnical data which needs to be considered. Surface subsidence and its negative impact on road geometry over time needs to be compensated by protection systems designed and implemented prior to time when real influence occurs. Linear or non-linear deformations are one of the most critical parameters to be overlooked at design stage. Also use of mining materials for construction of embankments as alternative to natural soils brings additional challenges and need for good identification of all geotechnical parameters of such material. As Silesia is region with one of the most concentrated deep coal mining activity in Europe problem of constructing safe and environmental friendly infrastructure is always critical. This paper discusses selected aspects of geotechnical practice implemented in the region for protection of transport infrastructure in such challenging geotechnical environment.

Environmental aspects of the implementation of geogrids for pavement optimisation

Technological developments in highway construction should not only result in durable, safe and cost-effective solutions for roads and pavements but also, and perhaps above all, lead to solutions that minimise the negative impact of construction on the environment. One of the ways to ensure these requirements are met is to apply technology using geosynthetics. This paper discusses the stabilisation of aggregate with hexagonal geogrids and the benefits - from the point of view of reducing the emission of harmful gases to the atmosphere - which can be realised from this approach, compared with traditional approaches. Solutions for the improvement of weak subgrades and optimisation of the entire pavement structure are discussed, along with the presentation of sample calculations of greenhouse gas emissions, carried out with the use of specialized software related to the construction of the structures in various technologies.