Effect of Groundwater Fluctuations on Pore Pressures and Earth Pressures on Coastal Excavation Retaining Walls |
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| Authors: | Lisha Zhang Kanghe Xie Dazhong Huang |
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| Institution: | 1. Coastal and Urban Geotechnical Engineering Research Center, Zhejiang University, Hangzhou, China;2. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou, China;3. National and Local Joint Engineering Laboratory of Rail Traffic Survey and Design, Third Railway Survey and Design Institute Group Corporation, Tianjin, China |
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| Abstract: | Pore water and earth pressures acting on retaining structures are investigated using an efficient coastal double-layered excavation model to determine offshore excavation responses to groundwater fluctuations outside foundation pits. Total pore water pressure includes excess pore water pressure (due to groundwater fluctuations) and steady pore water pressure (due to steady seepage) determined using one-dimensional consolidation theory of double-layered soil and one-dimensional steady-state flow theory, respectively. Rankine's active and passive earth pressures are obtained from pore water pressure. This method is applicable to arbitrary groundwater fluctuation conditions. How physical parameters affect pore water pressure is numerically investigated using examples, demonstrating the method's practicality for calculating pore water and earth pressures. |
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| Keywords: | analytical solution coastal excavation earth pressure groundwater fluctuations pore water pressure |
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