【Daily Discussion】Public Utilities – Water Resources and Hydropower – 20210216
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What are the engineering measures to prevent permeable deformation? We welcome active participation in discussions; the system offers generous rewards for answering questions from VIP members! ! !
1. Adopt horizontal or vertical impermeabilization measures to extend the seepage path as much as possible, thereby reducing the seepage gradient; 2. Implement drainage and pressure-reduction measures to lower the seepage pressure at the water saturation line of the dam body and at the seepage outlets downstream. At areas where piping may occur, a filter layer should be installed to prevent fine particles from being carried away by seepage flows; in areas downstream where soil flow might happen, a weight load can be applied to enhance the soil’s capacity to resist permeable deformation.
1. Adopt horizontal or vertical impermeabilization measures to extend the seepage path as much as possible, thereby reducing the seepage gradient; 2. Implement drainage and pressure-reduction measures to lower the seepage pressure at the water saturation line of the dam body and at the seepage outlets downstream. At areas where piping may occur, a filter layer should be installed to prevent fine particles from being carried away by seepage flows; in areas downstream where soil flow might happen, a weight load can be applied to enhance the soil’s capacity to resist permeable deformation.
1. Adopt horizontal or vertical impermeabilization measures to extend the seepage path as much as possible, thereby reducing the seepage gradient; 2. Implement drainage and pressure-reduction measures to lower the seepage pressure at the water saturation line of the dam body and at the seepage outlets downstream. At areas where piping may occur, a filter layer should be installed to prevent fine particles from being carried away by seepage flows; in areas downstream where soil flow might happen, a weight load can be applied to enhance the soil’s capacity to resist permeable deformation.
1. Adopt horizontal or vertical impermeabilization measures to extend the seepage path as much as possible, thereby reducing the seepage gradient; 2. Implement drainage and pressure-reduction measures to lower the seepage pressure at the water saturation line of the dam body and at the seepage outlets downstream. At areas where piping may occur, a filter layer should be installed to prevent fine particles from being carried away by seepage flows; in areas downstream where soil flow might happen, a weight load can be applied to enhance the soil’s capacity to resist permeable deformation.
1. Adopt horizontal or vertical impermeabilization measures to extend the seepage path as much as possible, thereby reducing the seepage gradient; 2. Implement drainage and pressure-reduction measures to lower the seepage pressure at the water saturation line of the dam body and at the seepage outlets downstream. At areas where piping may occur, a filter layer should be installed to prevent fine particles from being carried away by seepage flows; in areas downstream where soil flow might happen, a weight load can be applied to enhance the soil’s capacity to resist permeable deformation.
1. Install horizontal and vertical impermeable barriers to increase the length of the seepage path, reduce the seepage gradient, or prevent seepage flow. 2. Install drainage ditches or pressure reduction wells to reduce the seepage pressure at the downstream seepage outlets, and systematically remove seepage water. 3. In areas prone to piping, a filter layer should be installed to prevent fine particles from being carried away by seepage flow. 4. In areas where soil flow may occur, the weight of the cover at the seepage outlet should be increased. A filter layer should also be laid between the cover weight and the protective layer.
1. Adopt horizontal or vertical impermeabilization measures to extend the seepage path as much as possible, thereby reducing the seepage gradient; 2. Implement drainage and pressure-reduction measures to lower the seepage pressure at the water saturation line of the dam body and at the seepage outlets downstream. At areas where piping may occur, a filter layer should be installed to prevent fine particles from being carried away by seepage flows; in areas downstream where soil flow might happen, a weight load can be applied to enhance the soil’s capacity to resist permeable deformation.
First, an anti-filter layer is used to achieve the function of filtering soil and draining water (both preventing the loss of fine particles and reducing water pressure)； The second approach is to reduce the seepage gradient by increasing thickness (for example, by adding impermeable linings upstream or increasing the thickness of the core wall of the earth dam).
1. Adopt horizontal or vertical impermeabilization measures to extend the seepage path as much as possible, thereby reducing the seepage gradient; 2. Implement drainage and pressure-reduction measures to lower the seepage pressure at the water table of the dam body and at the seepage outlets downstream； 3. At areas where piping may occur, a filter layer should be installed to prevent fine particles from being carried away by seepage flow. 4. In areas downstream where soil flow may happen, a surcharge can be applied to enhance the soil’s capacity to resist permeable deformation.
1. Adopt horizontal or vertical impermeabilization measures to extend the seepage path as much as possible, thereby reducing the seepage gradient; 2. Implement drainage and pressure-reduction measures to lower the seepage pressure at the water saturation line of the dam body and at the seepage outlets downstream. At areas where piping may occur, a filter layer should be installed to prevent fine particles from being carried away by seepage flows; in areas downstream where soil flow might happen, a weight load can be applied to enhance the soil’s capacity to resist permeable deformation.