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Critical State Stress Analysis for Soil Body of Potential Heave
High head hydraulic pressure in confined aquifer could cause failure of heaving if the confined aquifer was buried under the bottom of excavation. Therefore, analysis of heaving stability plays a significant role in the dewatering design. The objective of analysis is to determine drawdown as well as layout of wells and land subsidence due to water withdrawal. Currently, the formula widely used in the industry is based on the pressure balance theory. Physical meaning of the formula is that the effective stress of the soil below the bottom of excavation is ensured to be greater than zero. Terzaghi derived a similar formula for excavation in sand. This paper compares these two approaches and verifies that these two approaches are essentially similar in case of safety factor of heaving being unity.
Critical State Stress Analysis for Soil Body of Potential Heave
High head hydraulic pressure in confined aquifer could cause failure of heaving if the confined aquifer was buried under the bottom of excavation. Therefore, analysis of heaving stability plays a significant role in the dewatering design. The objective of analysis is to determine drawdown as well as layout of wells and land subsidence due to water withdrawal. Currently, the formula widely used in the industry is based on the pressure balance theory. Physical meaning of the formula is that the effective stress of the soil below the bottom of excavation is ensured to be greater than zero. Terzaghi derived a similar formula for excavation in sand. This paper compares these two approaches and verifies that these two approaches are essentially similar in case of safety factor of heaving being unity.
Critical State Stress Analysis for Soil Body of Potential Heave
Yang, Jian-Min (author) / Zheng, Gang (author)
GeoShanghai International Conference 2010 ; 2010 ; Shanghai, China
2010-05-14
Conference paper
Electronic Resource
English
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