Numerical analysis the calcium leaching effect in concrete and concrete-rock interface on concrete gravity dam anti-sliding stability AITranslate
Abstract AITranslate
Decomposition of concrete calcium compounds in the leaching process constantly changed the concrete gravity dam’s sliding and resisting forces, which endangered project safety. Nonetheless, the calcium leaching effect on dam sliding stability has not been studied previously, and the dam factor of safety(FOS) evolution remained unknown. This research numerically investigated the impact of calcium leaching on concrete gravity dam stability. A relation between bonded cohesion of concrete-rock interface and CaO/SiO2 ratio of CSH is presented to investigate the shear strength deterioration in the leaching process. The evolution of dam FOS, sliding and resisting forces in a hundred years is obtained. The results showed that the calcium leaching reduced dam stability. Parameter sensitivity analysis showed that the grout curtain hydraulic conductivity and rock foundation type significantly affect the dam FOS. We can improve dam stability in the leaching process by reducing the initial hydraulic conductivity of the grout curtain.
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DOI：https://doi.org/10.1016/j.cscm.2022.e01158
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Decomposition of concrete calcium compounds in the leaching process constantly changed the concrete gravity dam’s sliding and resisting forces, which endangered project safety. Nonetheless, the calcium leaching effect on dam sliding stability has not been studied previously, and the dam factor of safety(FOS) evolution remained unknown. This research numerically investigated the impact of calcium leaching on concrete gravity dam stability. A relation between bonded cohesion of concrete-rock interface and CaO/SiO2 ratio of CSH is presented to investigate the shear strength deterioration in the leaching process. The evolution of dam FOS, sliding and resisting forces in a hundred years is obtained. The results showed that the calcium leaching reduced dam stability. Parameter sensitivity analysis showed that the grout curtain hydraulic conductivity and rock foundation type significantly affect the dam FOS. We can improve dam stability in the leaching process by reducing the initial hydraulic conductivity of the grout curtain.
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| GB/T 7714-2015 | [1] Juan Yue, Zhenzhong Shen, Liqun Xu, et al. Case Studies in Construction Materials, 2022(17). DOI:10.1016/j.cscm.2022.e01158. |
| MLA | [1] Juan Yue, et al., Case Studies in Construction Materials, no. 17, 2022, https://doi.org/10.1016/j.cscm.2022.e01158. |
| APA | [1] Juan Yue, Zhenzhong Shen, Liqun Xu, & Kailai Zhang. (2022). Case Studies in Construction Materials(17). https://doi.org/10.1016/j.cscm.2022.e01158 |
| IEEE | [1] Juan Yue, Zhenzhong Shen, Liqun Xu, and Kailai Zhang, Case Studies in Construction Materials, no. 17, 2022, doi: 10.1016/j.cscm.2022.e01158. keywords: {CH Calcium hydroxide;Calcium hydroxide;CSH Calcium silicate hydrate;Calcium silicate hydrate;FOS Factor of safety;Factor of safety;LEM Limit equilibrium Method;Limit equilibrium Method;NFEM Nonlinear finite element method;Nonlinear finite element method;DDA Discontinuous deformation analysis;Discontinuous deformation analysis;KC relation KozenyCarman relation;KozenyCarman relation;ODEs Ordinary differential equations;Ordinary differential equations;DAEs Differential algebraic equations;Differential algebraic equations;DEM Discrete Element Method;Discrete Element Method;LEM;Concrete gravity dam;Stability;Calcium leaching} |