【Daily Discussion】Public Utilities – Water Resources and Hydropower – 20210119

This post was last edited by Dariga on 2021-1-19 at 10:55 (1). The upstream surface of the dam is made into an inclined or stepped surface facing upstream, so as to use the weight of the water on that surface to increase the dam’s 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 deep into the bedrock can be installed at the dam heel to cut through the shallower weak layer, 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 dam 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 use 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 deep into the bedrock can be installed at the dam heel to cut through the shallower weak layer, 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 dam 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 use 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 deep into the bedrock can be installed at the dam heel to cut through the shallower weak layer, 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 dam 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 use 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 deep into the bedrock can be installed at the dam heel to cut through the shallower weak layer, 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 dam 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 use 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 deep into the bedrock can be installed at the dam heel to cut through the shallower weak layer, 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 dam 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 use 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 deep into the bedrock can be installed at the dam heel to cut through the shallower weak layer, 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 dam 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.

①By utilizing the weight of the water, the upstream surface of the dam is made to face upstream, and the weight of the water on the dam surface is used to enhance the dam’s resistance to sliding； ②Utilize an advantageous excavation profile ； ③Set up the tooth wall ； ④Pumping measures to reduce the buoyant force on the dam foundation ； ⑤Strengthen the foundation ； ⑥Transverse joint grouting ； ⑦Pre-stressing measures, etc.

(1) The upstream surface of the dam is made into an inclined or stepped surface facing upstream, so as to use 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 deep into the bedrock can be installed at the dam heel to cut through the shallower weak layer, 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 dam 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 use 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 deep into the bedrock can be installed at the dam heel to cut through the shallower weak layer, 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 dam 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 use 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 deep into the bedrock can be installed at the dam heel to cut through the shallower weak layer, 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 dam 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.