Investigating the internal erosion behavior and microscopic mechanisms of chemically stabilized soil: an experimental study DOI Creative Commons
Buping Zhang, Xinghua Zhu,

Xuewen Tao

et al.

Frontiers in Earth Science, Journal Year: 2024, Volume and Issue: 12

Published: Aug. 27, 2024

Introduction Internal erosion triggered by water pipeline leaks seriously threatens the stability of urban ground. Hangzhou, a city in Zhejiang Province, China, is facing critical challenges due to ground collapse (UGC) caused internal erosion. However, there lack research on prevention UGC improving erodibility underground soil. Addressing this issue utmost importance ensure city’s and safety. This paper proposes improve typical sandy silt soils with chemical stabilisers. Methods The effects three stabilisers, lignosulphonate (LS), lime (LI), lignin fibre (LF), shear stress ( τ c ) coefficient k d were investigated, which from Zhejiang, hole test (HET) at different mixing amounts conservation times. Results findings indicate that LF mainly improves resistance increasing , maximum increase 2.38 times; LI decreasing decrease 2.18 After adding LS, did not change significantly. scanning electron microscope (SEM) revealed inclusion led formation larger agglomerates microstructure soil remained dispersed even after LS. Various stabilisers used exhibited distinct mechanisms. Sandy improved exfoliated into agglomerates, displaying high On other hand, treated still lacks protective layer shows minimal improvements its ability withstand In contrast, LS-amended remains stripped individual particles insignificant changes resistance. Discussion study can provide conceptual framework for choosing foundation treatment techniques future development projects.

Language: Английский

Applying Plaxis 3D To Model Leaking Water Supply Pipe Causing Sandy Soil Erosion and Sinkhole Formation DOI Open Access

Nhut Nhut Nguyen,

Yen Hai Tran,

Bao-Chi Le

et al.

IOP Conference Series Materials Science and Engineering, Journal Year: 2023, Volume and Issue: 1289(1), P. 012095 - 012095

Published: Aug. 1, 2023

Abstract Water supply pipes in urban areas are always buried underground. There many causes of pipe breakage and leakage high-pressure water from the to outside, flow has a pressure higher than soil erosion limit, causing structure be broken, eroding surrounding clayey sandy soil. The development eroded area, which expands over time, is cause formation sinkhole under road, dangerous for vehicles people. In this study, authors apply finite element software (Plaxis 3D) model pipelines case pipeline leaks with different pressures. Analytical models indicate that dependent on extent erosive soil, related direction pressurized jet, depth pipe.

Language: Английский

Citations

2
Investigating the internal erosion behavior and microscopic mechanisms of chemically stabilized soil: an experimental study DOI Creative Commons
Buping Zhang, Xinghua Zhu,

Xuewen Tao

et al.

Frontiers in Earth Science, Journal Year: 2024, Volume and Issue: 12

Published: Aug. 27, 2024

Introduction Internal erosion triggered by water pipeline leaks seriously threatens the stability of urban ground. Hangzhou, a city in Zhejiang Province, China, is facing critical challenges due to ground collapse (UGC) caused internal erosion. However, there lack research on prevention UGC improving erodibility underground soil. Addressing this issue utmost importance ensure city’s and safety. This paper proposes improve typical sandy silt soils with chemical stabilisers. Methods The effects three stabilisers, lignosulphonate (LS), lime (LI), lignin fibre (LF), shear stress ( τ c ) coefficient k d were investigated, which from Zhejiang, hole test (HET) at different mixing amounts conservation times. Results findings indicate that LF mainly improves resistance increasing , maximum increase 2.38 times; LI decreasing decrease 2.18 After adding LS, did not change significantly. scanning electron microscope (SEM) revealed inclusion led formation larger agglomerates microstructure soil remained dispersed even after LS. Various stabilisers used exhibited distinct mechanisms. Sandy improved exfoliated into agglomerates, displaying high On other hand, treated still lacks protective layer shows minimal improvements its ability withstand In contrast, LS-amended remains stripped individual particles insignificant changes resistance. Discussion study can provide conceptual framework for choosing foundation treatment techniques future development projects.

Language: Английский

Citations

0