【Daily Discussion】Public Utilities – Water Resources and Hydropower – 20210510
Thread Content
What is the purpose of seepage calculation for earth dams? Answer: The purpose of seepage analysis for earth and rock dams is to: ① determine the water saturation lines within the dam body as well as the locations where water escapes downstream, and to create maps showing the distribution of equipotential lines or flow networks within the dam body and its foundation; these maps provide a basis for assessing the stability of the dam, conducting stress and strain analyses, and selecting appropriate drainage systems； ②Calculate the seepage flux through the dam body and its foundation in order to estimate the leakage losses of the reservoir and determine the size of the dam’s drainage systems ； ③Determine the seepage gradients at the outlet section of the dam slope and on the downstream foundation surface, as well as the seepage gradients between different soil layers, in order to assess the seepage stability at that location ； ④Determine the position of the free water surface within the upstream dam shell when the reservoir water level drops, and estimate the resulting pore pressure for use in the stability analysis of the upstream dam slope. Based on these analysis results, the initially proposed dam cross-section is modified. Feel free to participate actively in the discussions – the system offers generous rewards for answering questions from VIP members! ! !
(1) Determine the seepage force to provide a basis for assessing the stability of the dam body； (2) Test the seepage stability of the soil, and determine the dimensions of the impermeable layers in the dam body and foundation, as well as the type and dimensions of the drainage facilities ； (3) Determine the seepage loss through the dam and riverbanks, and design the capacity of the drainage system.
①Determine the positions of the seepage line along the dam body and the outlet points downstream, and draw equipotential lines or flow net diagrams within the dam body and foundation; ② Calculate the seepage rates through the dam body and its foundation in order to estimate the leakage losses of the reservoir and determine the size of the dam’s drainage systems; ③ Determine the seepage gradients at the outlet sections of the dam slopes and on the downstream foundation surface, as well as the seepage gradients between different soil layers, in order to assess the seepage stability at those locations; ④ Determine the position of the free water surface within the upper part of the dam when the reservoir water level drops, and estimate the pore pressure for use in analyzing the stability of the upstream dam slopes.
(1) Determine the seepage force to provide a basis for assessing the stability of the dam body； (2) Test the seepage stability of the soil, and determine the dimensions of the impermeable layers in the dam body and foundation, as well as the type and dimensions of the drainage facilities ； (3) Determine the seepage loss through the dam and riverbanks, and design the capacity of the drainage system.
①Determine the positions of the seepage line along the dam body and the outlet points downstream, and draw equipotential lines or flow net diagrams within the dam body and foundation; ② Calculate the seepage rates through the dam body and its foundation in order to estimate the leakage losses of the reservoir and determine the size of the dam’s drainage systems; ③ Determine the seepage gradients at the outlet sections of the dam slopes and on the downstream foundation surface, as well as the seepage gradients between different soil layers, in order to assess the seepage stability at those locations; ④ Determine the position of the free water surface within the upper part of the dam when the reservoir water level drops, and estimate the pore pressure for use in analyzing the stability of the upstream dam slopes.
(1) Determine the seepage force to provide a basis for assessing the stability of the dam body； (2) Test the seepage stability of the soil, and determine the dimensions of the impermeable layers in the dam body and foundation, as well as the type and dimensions of the drainage facilities ； (3) Determine the seepage loss through the dam and riverbanks, and design the capacity of the drainage system.
(1) Determine the seepage force to provide a basis for assessing the stability of the dam body； (2) Test the seepage stability of the soil, and determine the dimensions of the impermeable layers in the dam body and foundation, as well as the type and dimensions of the drainage facilities ； (3) Determine the seepage loss through the dam and riverbanks, and design the capacity of the drainage system.
The purpose of seepage analysis for earth-rock dams is: 1. To determine the saturation line of the dam body and the locations where water escapes downstream, and to draw contour maps or flow network diagrams within the dam body and foundation, thereby providing a basis for assessing the stability of the dam, conducting stress and strain analysis, and selecting drainage systems； /2. Calculate the seepage rates through the dam body and its foundation, in order to estimate the leakage losses of the reservoir and determine the size of the dam’s drainage systems ； 3. Determine the seepage gradients at the outlet section of the dam slope and on the downstream foundation surface, as well as the seepage gradients between different soil layers, in order to assess the seepage stability at those locations ； 4. Determine the position of the free water surface within the upstream dam shell when the reservoir water level drops, and estimate the pore pressure for use in the stability analysis of the upstream dam slope.
(1) Determine the seepage force to provide a basis for assessing the stability of the dam body； (2) Test the seepage stability of the soil, and determine the dimensions of the impermeable layers in the dam body and foundation, as well as the type and dimensions of the drainage facilities ； (3) Determine the seepage loss through the dam and riverbanks, and design the capacity of the drainage system.
(1) Determine the seepage force to provide a basis for assessing the stability of the dam body； (2) Test the seepage stability of the soil, and determine the dimensions of the impermeable layers in the dam body and foundation, as well as the type and dimensions of the drainage facilities ； (3) Determine the seepage loss through the dam and riverbanks, and design the capacity of the drainage system.
1. Determine the seepage force to provide a basis for assessing the stability of the dam; 2. Evaluate the seepage stability of the soil, and determine the dimensions of the impermeable layers in the dam and its foundation, as well as the type and size of drainage systems; 3. Determine the amount of seepage water that passes through the dam and riverbanks, and design the capacity of the drainage system.