Abstract
This investigation focused on the three-dimensional (3D) seepage field simulation of an asphaltic concrete core rockfill dam (ACRD) under the design water level conditions. At first, the finite element theory of seepage is introduced in the arid area; then, a hydro-junction projection on the Nuer River in Xinjiang is selected as engineering background, the finite element model of a seepage field of an asphaltic and concrete core rockfill dam under the design water level condition is established, and a boundary condition is determined, and the next distribution of a seepage field of different profiles are plotted, and the monitoring value of different points is compared with the finite element solution; conclusions can be drawn that when the antiseepage system of the dam foundation is good, the water level at the downstream side of the core wall is greatly reduced; for the dam foundation, the effects of reducing head of the cutoff wall are rather obvious, and for the dam body, certain leakage defects at the joint of an impermeable body in the cross sections 0 + 456.5 m and 0 + 540 m can exist. For the dam-around seepage, the hydrogeological condition conforms to the actual conditions. These conclusions can provide great significance for the future design.
Highlights
A dam is a water storage construction, and it has many types [1], for example, an embankment dam and a concrete dam, but a core wall dam is applied widely in the world currently [2, 3], because it has many virtues, such as simple construction, good adaptability to dam foundation conditions, good seismic performance, and economy to invest in [4]
For the core wall dam, the distribution of a seepage field is an important issue for the safety of the dam [5]
A nonlinear elastic deformation and an unsteady seepage coupling model are suggested to simulate the seepage and deformation process by Chen and Zhang [10]; the Monte Carlo simulation and random field theory are applied to simulate the seepage of an embankment dam by Tan et al [11]; the seepage behavior in the drainage area of a face sand is investigated by Choo et al [12]; an inversion of dam seepage parameters based on the finite element model is performed by Ren et al [13]
Summary
A dam is a water storage construction, and it has many types [1], for example, an embankment dam and a concrete dam, but a core wall dam is applied widely in the world currently [2, 3], because it has many virtues, such as simple construction, good adaptability to dam foundation conditions, good seismic performance, and economy to invest in [4]. A nonlinear elastic deformation and an unsteady seepage coupling model are suggested to simulate the seepage and deformation process by Chen and Zhang [10]; the Monte Carlo simulation and random field theory are applied to simulate the seepage of an embankment dam by Tan et al [11]; the seepage behavior in the drainage area of a face sand is investigated by Choo et al [12]; an inversion of dam seepage parameters based on the finite element model is performed by Ren et al [13] These investigations intend to the wet area, for the distribution of a seepage field in the arid area; the investigation is scarce; the investigation area in the paper is located in Xinjiang Province, China.
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