【Daily Discussion】Public Utilities – Water Resources and Hydropower – 20210406

①Using water weight to increase the self-weight of the dam body: ② Adopting an optimal excavation profile: ③ Installing tooth walls: ④ Dewatering measures: ⑤ Strengthening the foundation: ⑥ Transverse joint grouting: Prestressing measures:

(1) The upstream surface of the dam is made into an inclined or stepped surface facing upstream, so as to utilize the weight of the water on the dam surface to increase its resistance to sliding. (2) The dam foundation surface is excavated into an upstream-facing slope to increase the anti-sliding force. (3) When there is a weak layer facing downstream within the dam foundation, a tooth wall that extends into the bedrock can be installed at the base of the dam to cut through the shallower weak layers, forcing the potential sliding surface to slide along the bottom of the tooth wall or together with part of the bedrock. (4) When the downstream water level is high, it is advisable to install a drainage system at the dam foundation surface to pump water out periodically in order to reduce the uplift force at the dam base. (5) During design and construction, it is necessary to ensure good bonding between the concrete and the bedrock; when the integrity of the rock at the dam foundation is poor, consolidation grouting should be used to reinforce the foundation. And carry out curtain grouting as well as treatment of faults, fracture zones, and weak interlayers. (6) In the case of embankment dam sections or rock foundations with fractured zones or interlayers, partial or full grouting of the transverse joints in some of the dam sections or the entire dam is carried out to enhance the integrity and stability of the dam. (7) Near the upstream face of the dam, high-strength steel cables are anchored using deep holes and prestressed, which not only enhances the anti-sliding stability of the dam but also eliminates tensile stresses at the dam foot.

(1) The upstream surface of the dam is made into an inclined or stepped surface facing upstream, so as to utilize the weight of the water on the dam surface to increase its resistance to sliding. (2) The dam foundation surface is excavated into an upstream-facing slope to increase the anti-sliding force. (3) When there is a weak layer facing downstream within the dam foundation, a tooth wall that extends into the bedrock can be installed at the base of the dam to cut through the shallower weak layers, forcing the potential sliding surface to slide along the bottom of the tooth wall or together with part of the bedrock. (4) When the downstream water level is high, it is advisable to install a drainage system at the dam foundation surface to pump water out periodically in order to reduce the uplift force at the dam base. (5) During design and construction, it is necessary to ensure good bonding between the concrete and the bedrock; when the integrity of the rock at the dam foundation is poor, consolidation grouting should be used to reinforce the foundation. And carry out curtain grouting as well as treatment of faults, fracture zones, and weak interlayers. (6) In the case of embankment dam sections or rock foundations with fractured zones or interlayers, partial or full grouting of the transverse joints in some of the dam sections or the entire dam is carried out to enhance the integrity and stability of the dam. (7) Near the upstream face of the dam, high-strength steel cables are anchored using deep holes and prestressed, which not only enhances the anti-sliding stability of the dam but also eliminates tensile stresses at the dam foot.

(1) The upstream surface of the dam is made into an inclined or stepped surface facing upstream, so as to utilize the weight of the water on the dam surface to increase its resistance to sliding. (2) The dam foundation surface is excavated into an upstream-facing slope to increase the anti-sliding force. (3) When there is a weak layer facing downstream within the dam foundation, a tooth wall that extends into the bedrock can be installed at the base of the dam to cut through the shallower weak layers, forcing the potential sliding surface to slide along the bottom of the tooth wall or together with part of the bedrock. (4) When the downstream water level is high, it is advisable to install a drainage system at the dam foundation surface to pump water out periodically in order to reduce the uplift force at the dam base. (5) During design and construction, it is necessary to ensure good bonding between the concrete and the bedrock; when the integrity of the rock at the dam foundation is poor, consolidation grouting should be used to reinforce the foundation. And carry out curtain grouting as well as treatment of faults, fracture zones, and weak interlayers. (6) In the case of embankment dam sections or rock foundations with fractured zones or interlayers, partial or full grouting of the transverse joints in some of the dam sections or the entire dam is carried out to enhance the integrity and stability of the dam. (7) Near the upstream face of the dam, high-strength steel cables are anchored using deep holes and prestressed, which not only enhances the anti-sliding stability of the dam but also eliminates tensile stresses at the dam foot.

(1) The upstream surface of the dam is made into an inclined or stepped surface facing upstream, so as to utilize the weight of the water on the dam surface to increase its resistance to sliding. (2) The dam foundation surface is excavated into an upstream-facing slope to increase the anti-sliding force. (3) When there is a weak layer facing downstream within the dam foundation, a tooth wall that extends into the bedrock can be installed at the base of the dam to cut through the shallower weak layers, forcing the potential sliding surface to slide along the bottom of the tooth wall or together with part of the bedrock. (4) When the downstream water level is high, it is advisable to install a drainage system at the dam foundation surface to pump water out periodically in order to reduce the uplift force at the dam base. (5) During design and construction, it is necessary to ensure good bonding between the concrete and the bedrock; when the integrity of the rock at the dam foundation is poor, consolidation grouting should be used to reinforce the foundation. And carry out curtain grouting as well as treatment of faults, fracture zones, and weak interlayers. (6) In the case of embankment dam sections or rock foundations with fractured zones or interlayers, partial or full grouting of the transverse joints in some of the dam sections or the entire dam is carried out to enhance the integrity and stability of the dam. (7) Near the upstream face of the dam, high-strength steel cables are anchored using deep holes and prestressed, which not only enhances the anti-sliding stability of the dam but also eliminates tensile stresses at the dam foot.

(1) The upstream surface of the dam is made into an inclined or stepped surface facing upstream, so as to utilize the weight of the water on the dam surface to increase its resistance to sliding. (2) The dam foundation surface is excavated into an upstream-facing slope to increase the anti-sliding force. (3) When there is a weak layer facing downstream within the dam foundation, a tooth wall that extends into the bedrock can be installed at the base of the dam to cut through the shallower weak layers, forcing the potential sliding surface to slide along the bottom of the tooth wall or together with part of the bedrock. (4) When the downstream water level is high, it is advisable to install a drainage system at the dam foundation surface to pump water out periodically in order to reduce the uplift force at the dam base. (5) During design and construction, it is necessary to ensure good bonding between the concrete and the bedrock; when the integrity of the rock at the dam foundation is poor, consolidation grouting should be used to reinforce the foundation. And carry out curtain grouting as well as treatment of faults, fracture zones, and weak interlayers. (6) In the case of embankment dam sections or rock foundations with fractured zones or interlayers, partial or full grouting of the transverse joints in some of the dam sections or the entire dam is carried out to enhance the integrity and stability of the dam. (7) Near the upstream face of the dam, high-strength steel cables are anchored using deep holes and prestressed, which not only enhances the anti-sliding stability of the dam but also eliminates tensile stresses at the dam foot.

(1) The upstream surface of the dam is made into an inclined or stepped surface facing upstream, so as to utilize the weight of the water on the dam surface to increase its resistance to sliding. (2) The dam foundation surface is excavated into an upstream-facing slope to increase the anti-sliding force. (3) When there is a weak layer facing downstream within the dam foundation, a tooth wall that extends into the bedrock can be installed at the base of the dam to cut through the shallower weak layers, forcing the potential sliding surface to slide along the bottom of the tooth wall or together with part of the bedrock. (4) When the downstream water level is high, it is advisable to install a drainage system at the dam foundation surface to pump water out periodically in order to reduce the uplift force at the dam base. (5) During design and construction, it is necessary to ensure good bonding between the concrete and the bedrock; when the integrity of the rock at the dam foundation is poor, consolidation grouting should be used to reinforce the foundation. And carry out curtain grouting as well as treatment of faults, fracture zones, and weak interlayers. (6) In the case of embankment dam sections or rock foundations with fractured zones or interlayers, partial or full grouting of the transverse joints in some of the dam sections or the entire dam is carried out to enhance the integrity and stability of the dam. (7) Near the upstream face of the dam, high-strength steel cables are anchored using deep holes and prestressed, which not only enhances the anti-sliding stability of the dam but also eliminates tensile stresses at the dam foot.

1) Utilize water weight: Make the upstream surface of the dam slope upward, and use the weight of the water on this surface to enhance the dam’s resistance to sliding； 2) Adopt an advantageous excavation profile: 3) Install a tooth wall to enhance anti-sliding stability ； 4) Impermeable drainage measures: to reduce the uplift force at the base of the dam. 5) Foundation reinforcement: to enhance the integrity and strength of the bedrock.

(1) The upstream surface of the dam is made into an inclined or stepped surface facing upstream, so as to utilize the weight of the water on the dam surface to increase its resistance to sliding. (2) The dam foundation surface is excavated into an upstream-facing slope to increase the anti-sliding force. (3) When there is a weak layer facing downstream within the dam foundation, a tooth wall extending into the bedrock can be installed at the dam foot to cut through the shallower weak layers... (4) When the water level downstream is high, a drainage system can be considered for installation on the dam foundation surface.

(1) The upstream surface of the dam is made into an inclined or stepped surface facing upstream, so as to utilize the weight of the water on the dam surface to increase its resistance to sliding. (2) The dam foundation surface is excavated into an upstream-facing slope to increase the anti-sliding force. (3) When there is a weak layer facing downstream within the dam foundation, a tooth wall that extends into the bedrock can be installed at the base of the dam to cut through the shallower weak layers, forcing the potential sliding surface to slide along the bottom of the tooth wall or together with part of the bedrock. (4) When the downstream water level is high, it is advisable to install a drainage system at the dam foundation surface to pump water out periodically in order to reduce the uplift force at the dam base. (5) During design and construction, it is necessary to ensure good bonding between the concrete and the bedrock; when the integrity of the rock at the dam foundation is poor, consolidation grouting should be used to reinforce the foundation. And carry out curtain grouting as well as treatment of faults, fracture zones, and weak interlayers. (6) In the case of embankment dam sections or rock foundations with fractured zones or interlayers, partial or full grouting of the transverse joints in some of the dam sections or the entire dam is carried out to enhance the integrity and stability of the dam. (7) Near the upstream face of the dam, high-strength steel cables are anchored using deep holes and prestressed, which not only enhances the anti-sliding stability of the dam but also eliminates tensile stresses at the dam foot.