Technogenic change of the geological environment of urban areas (by the example of Irkutsk town)

Kadetova, Alena V.; Rybchenko, A. A.; Trzhcinsky, Yu. B.

doi:10.12681/bgsg.16981

Cited by 3 publications

(4 citation statements)

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“…The scheme of the laboratory setup is presented in figure 1. The laboratory setup consisted of an intentionally damaged water pipe (2) buried in medium sand filling a cuboid box (1). The pipe was supplied by water form a container (4) located on the assumed 2 .…”

Section: Methodsmentioning

confidence: 99%

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Suffosion Holes as the Results of a Breakage of a Buried Water Pipe

Iwanek

Suchorab

Karpińska-Kiełbasa³

2017

Period. Polytech. Civil Eng.

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The result of a breakage of a buried water pipe is the water movement in soil, which can cause that fine soil particles are washed out from the solid matrix and transported through pores (suffosion process IntroductionDepressions or holes creating on the soil surface as a result of suffosion can be very dangerous, especially in urban areas. It is widely known that the most hazardous phenomena of this kind relate to water-engineering structures [1,2,3]. It stems from the fact that failures and damages of pipes occur in water, sewage and storm water systems all over the world during their operation [4,5,6]. Even the high-tech methods of pipes condition assessment do not enable to prevent leakages occurrence, because of their random character and multiplicity of their reasons [7,8,9]. Still insufficient knowledge about them [10] is caused by many different, both static (pipe and soil parameters) and dynamic (hydraulic working conditions), factors [11,12,13,14,15]. Creation of suffosion holes is a phenomenon specially typical and onerous for water supply systems of a high intensity rate placed in internally unstable soils. The result of a breakage of a buried water pipe is the water movement in soil, which can cause that fine soil particles are washed out from the solid matrix and transported through pores (suffosion process) [16,17,18,19,20,21]. As a result, depressions or holes can form on the soil surface. Holes creating on the soil surface by water outflowing after a failure of a buried pipeline (suffosion holes), are in different shapes and sizes.Recognition of factors influencing holes shapes and sizes would facilitate the prevention of hazardous suffosion effects connected with failures of water distribution systems. In the range of the presented article, the influence of pressure head in a water pipe on dimensions of suffosion holes was analysed. The basis of the analysis was results of laboratory investigations of the controlled leakage from a buried water pipe.

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Section: Methodsmentioning

confidence: 99%

“…It is widely known that the most hazardous phenomena of this kind relate to water-engineering structures [1,2,3]. It stems from the fact that failures and damages of pipes occur in water, sewage and storm water systems all over the world during their operation [4,5,6].…”

mentioning

confidence: 99%

Suffosion Holes as the Results of a Breakage of a Buried Water Pipe

Iwanek

Suchorab

Karpińska-Kiełbasa³

2017

Period. Polytech. Civil Eng.

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“…Ben-Mansour et al, 2012, Bakker et al, 2014, Berardi et al, 2014, creating not only onerous problems of water and financial losses for WDN exploiters (e.g. Eliades and Polycarpou, 2012, Deidda et al, 2014, Kutyłowska and Hotloś, 2014 but also the social and environmental risk connected with possibility of creation of empty spaces below the soil surface by the water flowing out from a damaged pipe under pressure , Kadetova et al, 2007, Khomenko, 2009. The empty spaces are dangerous especially in urban areas, because they can cause depressions or holes on the soil surface, threatening the vehicles on roads, existing infrastructure or even human life.…”

Section: Application Of Fractal Sets In Investigations Of Water Pipe Failuresmentioning

confidence: 99%

Fractal Geometry in Designing and Operating Water Networks

Iwanek¹,

Kowalski²,

Kowalska³

et al. 2020

J. Ecol. Eng.

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Fractals are self-similar sets that cannot be easily described by classical geometry. Fractal sets have been implemented in almost all areas of human activity since they were introduced to science by Mandelbrot in 1982. For the last 10 years, the interest in fractal geometry has increased by the issues connected with water distribution networks (WDNs). The aim of this paper was to review the application of fractal geometry in designing and operating WDNs. Treating a WDN as a fractal pattern enables its description and classification, simplifies the assessment of a network reliability, helps to solve the problems of routing and dimensioning WDN, as well as enables to select the places to locate measurement points in a network to control water quality, pressure in pipes and water flow rate. Moreover, the application of tree-shaped fractal patterns to reflect WDNs helps to solve the problems of their optimization. Fractal geometry can be also applied to investigate the results of WDNs failures connected with leakage of water to the ground. Using fractal dimension of a pattern created by points reflecting places of water outflow on the soil surface after a prospective pipe breakage enables to determine the zone near a pipe, where the outflow of water on the soil surface is possible. It is an important approach for the security of humans and existing infrastructure. Usage of fractal geometry in description, optimisation and operation analysis of WDNs still continues, which confirms the efficiency of fractal geometry as a research tool. On the other hand, it can be supposed that fractal geometry possibilities have still not been fully used.

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“…The second consequence of the leakage is the phenomenon of suffosion that could be defined as a process of flushing the small particles from the ground and displacing them which results in the presence of hollows or caverns. These may be particularly harmful in the urbanised areas, constituting the threat of construction disasters, dangerous for the people's lives and generating significant costs for the repairs of the streets or pavements [14][15][16]. Suffosion is possible if two conditions are met: geometricalconnected with soil physical parameters, and kinematicconnected with velocity of water outflowing from a damaged pipe [17].…”

Section: Introductionmentioning

confidence: 99%

FEM simulation of water lost through damaged household water connection

Iwanek

Suchorab

2019

MATEC Web Conf.

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The problem of water supply pipe’s failures is one of the most onerous for water distribution network’s (WDN) operators. Multiple actions undertaken to detect, minimise and eliminate the phenomenon of water losses are mainly focused on financial aspect of lost water. However, at some point, the further minimisation of water losses is unprofitable due to reaching the economic level of water leakages. In WDNs failures analysis the biggest emphasis is put on damages of main pipes and distribution pipes, while failures of household water connections are often neglected. That is because the most typical water losses in household connections are hard-to-detect background leakages with relatively small water outflow. Still, in a long-time perspective, such leakages can cause significant water losses. The aim of this paper was to evaluate the parameters of water lost through damaged household water connection (volume, velocity, suffosion conditions). The basis for the analysis were laboratory investigations and a numerical simulation of a pipe failure using the FEFLOW v. 5.3 software. The results of the simulation, compared with laboratory tests results, enabled to state that, contrary to the widespread practice, leakages from household connections cannot be ignored.

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Technogenic change of the geological environment of urban areas (by the example of Irkutsk town)

Cited by 3 publications

References 0 publications

Suffosion Holes as the Results of a Breakage of a Buried Water Pipe

Suffosion Holes as the Results of a Breakage of a Buried Water Pipe

Fractal Geometry in Designing and Operating Water Networks

FEM simulation of water lost through damaged household water connection

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