Application of Biot Consolidation Theory to Analyze Land Subsidence

Wang, Shu Fang; Zheng, Ming Xin

doi:10.4028/www.scientific.net/amr.168-170.2615

Cited by 2 publications

(2 citation statements)

References 1 publication

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“…Such higher-order elements as quadratic 6-node and 4th-order 15-node triangular element are suitable to model the deformations and stresses in the soils (Wu et al, 2014). Plaxis 2D uses Biot consolidation theory, and the formulae are described in Eqs 1, 2 (Wang and Zheng, 2010;Sun et al, 2015). When undertaking the "consolidation calculation," the Biot consolidation theory accurately reflects the relationship between pore pressure dissipate and soil skeleton and realizes 3.59 Cohesion (consolidation fast shear), c q (kPa) 10.67 Friction angle (consolidation fast shear), φ q ( °)…”

Section: Numerical Methods Of the Piled Mountain By Using The Excavated Soilmentioning

confidence: 99%

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Stability Satisfied Design and Construction of Excavated Soil Dumps in a Soft Soil Region in China

Wang

Zhan

et al. 2022

Front. Earth Sci.

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Dumping is the main disposal method of the excavated soil from underground engineering in China; however, due to a lack of construction experiences and technical standards, landslide disasters often occurred during rapid dumping of excavated soil in soft soil regions. In this paper, geotechnical tests were conducted on the excavated soil from a foundation engineering site in Hangzhou, where the excavated soil would be used to construct a piled mountain. On this basis, a numerical study was carried out to investigate the effects of the design parameters (heap height, slope gradient) and construction parameters (layer thickness, heap speed) on the dump stability and failure mode. The results show that the safety factor of the excavated soil dump decreases with increasing heap height, slope gradient, layer thickness, and heap speed. The potential slide surfaces are toe circle, and compared to layer thickness and heap speed, the heap height and slope gradient have more remarkable influence on the depth and area of potential slide mass. The heap height limit increases with a decrease in slope gradient, and the heap speed limit decreases with an increase in layer thickness. Under the premise of ensuring the slope stability, the optimal design and construction parameters were obtained, i.e., heap height 28 m, slope gradient 1:2.75, layer thickness 1.0 m, and heap speed 0.50 m/day. Compared to the original design scheme, the storage capacity increases by 20.01%, and the construction duration decreases by 30.25% in the optimal design.

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Section: Numerical Methods Of the Piled Mountain By Using The Excavated Soilmentioning

confidence: 99%

“…the coupling in real significance (Wang and Zheng, 2010). Plaxis 2D uses the shear strength reduction technique and the formulae are described in Eqs 3, 4 (Matsui and San, 1992).…”

Section: Numerical Methods Of the Piled Mountain By Using The Excavated Soilmentioning

confidence: 99%

Stability Satisfied Design and Construction of Excavated Soil Dumps in a Soft Soil Region in China

Wang

Zhan

et al. 2022

Front. Earth Sci.

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Comprehensive database of land subsidence in 143 major coastal cities around the world: overview of issues, causes, and future challenges

Pedretti,

Giarola,

Korff

et al. 2024

Front. Earth Sci.

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Subsidence refers to the gradual lowering or sudden sinking of the ground surface and is known to impact human lives in terms of damages to the infrastructures, utility lines, and buildings as well as changes in the surficial drainage systems and groundwater conditions. The impacts of land subsidence will be greater in the future, considering the sea level rise, population growth, intensification of coastal erosion and extreme events, as well as increase in flood risk or freshwater salinization, mostly in coastal cities. The main aim of this work is to provide an open-source, peer-reviewed, and comprehensive database identifying the main and secondary causes of land subsidence in 143 coastal cities. We highlight the potential impacts of subsidence that are still unknown in some at-risk cities and non-existence of mitigation measures. The database additionally shows that mitigation measures, specifically those addressing subsidence due to groundwater extraction, have proven successful in the past. The proposed database aims to increase the knowledge on the subsidence phenomenon and also global awareness of land subsidence issues among researchers, the scientific community, stakeholders, and policymakers in terms of urban planning and development.

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Application of Biot Consolidation Theory to Analyze Land Subsidence

Cited by 2 publications

References 1 publication

Stability Satisfied Design and Construction of Excavated Soil Dumps in a Soft Soil Region in China

Stability Satisfied Design and Construction of Excavated Soil Dumps in a Soft Soil Region in China

Comprehensive database of land subsidence in 143 major coastal cities around the world: overview of issues, causes, and future challenges

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