期刊
SUSTAINABILITY
卷 15, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/su15118931
关键词
internal soil erosion; sinkhole; defective pipes; urban environments
Sinkholes are a major underground hazard that threatens infrastructure and lives, with significant costs and increased flood risk. Urban sinkholes are mainly manmade due to soil erosion from aging pipes. Climate change, storm surges, and urbanization contribute to increased subsidence in urban environments. Further experimental and numerical research is urgently needed to expand understanding of internal soil erosion due to defective pipes (SEDP).
Sinkholes are a significant underground hazard that threatens infrastructure and lives and sometimes results in fatalities. The annual cost of sinkhole damages exceeds $300 million, although this estimate is likely underestimated due to the need for national tracking. Sinkholes can also alter natural drainage patterns, leading to increased flood risk. While natural sinkholes occur, those in urban areas are predominantly manmade, caused by soil erosion from defective pipes, typically due to aging. Climate change, storm surges, and urbanization have accelerated subsidence in urban environments, posing greater risks to critical infrastructure and densely populated areas. Extensive research has focused on soil erosion in dams; however, this knowledge does not necessarily apply to erosion through orifices, where gravity and other factors play significant roles. This paper presents a critical literature review on internal soil erosion due to defective pipes (SEDP). The review highlights that hydraulic loading, backfill type, and pipe conditions (defect shape, size, and depth) influence SEDP. Key findings from experiments and numerical studies are summarized, while mechanisms and knowledge gaps are identified. However, it is concluded that the current understanding in this field remains limited, underscoring the urgent need for further experimental and numerical research to expand the knowledge base on SEDP.
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