Physical and analytical modeling of soil loss caused by a defective sewer pipe with different defect locations

Tang, Yao; Zhu, David Z.; Chan, Dave; Zhang, Shuai

doi:10.1007/s11440-022-01747-7

Cited by 7 publications

(3 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This escalation may be attributed to the heightened hydraulic gradient at the defect as it approached the pipe bottom, leading to increased water discharge rates and consequently more substantial ground collapse. However, these findings contrast with those reported by Tang et al [4,8] . Their experimental results indicated that as the defect location shifted from top to bottom of the pipeline, sand and water flow rates slightly decreased.…”

Section: Test Resultscontrasting

confidence: 76%

“…Other factors affecting ground collapse have also been studied in detail by researchers, including the water head, soil grading, soil type, and shape of defects [6,7]. Furthermore, an analytical model based on the free-fall arch theory was proposed to predict the rate of sand and water loss induced by pipe leakage, which was validated using a model test [7,8]. However, because of the shortcomings of experimental studies investigating the mesoscopic mechanism of soil erosion, a numerical method was adopted to explore this mechanism in depth.…”

Section: Introductionmentioning

confidence: 99%

“…However, to the best of our knowledge, no recent studies have focused on the changes in the forces acting on pipe structures during leakage. Although many studies have investigated pipeline erosion, limited attention has been paid to the effects of different leak locations on soil erosion [8]. Therefore, this study aims to investigate the effects of various leak locations on soil erosion and the development of soil pressure in pipelines.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental and numerical investigation on soil erosion under different pipeline-leaking locations

Wang,

Tan,

Long

2024

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

In recent years, cave-in ground failures have become increasingly common worldwide. The leakage of defective pipelines buried below ground level has been identified as a significant contributor to these failures. This study utilized experimental seepage-erosion tests to characterize ground collapses resulting from pipeline leakage and examined the impacts of leakage locations on soil and water losses. Subsequently, discrete element method-finite difference method (DEM-FDM) coupling analyses were conducted to elucidate the mesoscopic mechanisms of pipeline leakage, including changes in seepage force, effective stress, and soil pressure on the pipeline during leakage. The findings include: (1) The locations of leaking spots on pipelines significantly influenced soil and water losses; (2) Leaking spots closer to the pipe bottom led to more severe ground collapses due to larger seepage forces; (3) Soil pressure exhibited decreasing trends near the leaking spot and increasing trends at other locations due to the soil arching effect. These insights provide valuable guidance for preventing pipeline leakages.

show abstract

Section: Test Resultscontrasting

confidence: 76%