【Daily Discussion】Public Utilities – Water Resources and Hydropower – 20210601

Methods to improve anti-slip stability: using an inclined base; methods to improve overturning stability: widening the wall foot, changing the cross-sectional shape of the wall, and altering the slope of the wall face and the back side of the wall. (1) Anti-sliding retaining walls should be installed at the front edge of the landslide. If necessary, it can be used in combination with measures such as drainage, weight reduction, and anchoring. (2) Anti-sliding retaining walls should be designed based on the greater of the remaining sliding force of the landslide and the Coulomb earth pressure; their height and foundation depth shall prevent the sliding mass from slipping over the top of the wall or from moving within the soil layers beneath the foundation. (3) When the foundation depth of anti-sliding retaining walls is large and the stability of the soil is poor, temporary support measures should be taken. The construction must be carried out in stages to ensure the stability of the slope during construction and maintain safety.

Methods for providing an inclined base and using tenon foundations to enhance overturning stability: widening the wall foot, changing the cross-sectional shape of the wall, and altering the slope of the wall face and the back side of the wall.

(1) Increase the length of the covering, or, without compromising the impermeability and stability, move the drainage facilities closer to the bottom slab of the sluice in order to reduce the seepage pressure acting on the slab. (2) Utilize the upstream reinforced concrete deck as a slip resistance plate

Methods for providing an inclined base and using tenon foundations to enhance overturning stability: widening the wall foot, changing the cross-sectional shape of the wall, and altering the slope of the wall face and the back side of the wall.

Methods to improve anti-slip stability: using an inclined base; methods to improve overturning stability: widening the wall foot, changing the cross-sectional shape of the wall, and altering the slope of the wall face and the back side of the wall. (1) Anti-sliding retaining walls should be installed at the front edge of the landslide. If necessary, it can be used in combination with measures such as drainage, weight reduction, and anchoring. (2) Anti-sliding retaining walls should be designed based on the greater of the remaining sliding force of the landslide and the Coulomb earth pressure; their height and foundation depth shall prevent the sliding mass from slipping over the top of the wall or from moving within the soil layers beneath the foundation. (3) When the foundation depth of anti-sliding retaining walls is large and the stability of the soil is poor, temporary support measures should be taken. The construction must be carried out in stages to ensure the stability of the slope during construction and maintain safety.

1. Increase the length of the covering, or, without compromising the stability against seepage, move the drainage facilities closer to the bottom slab of the sluice in order to reduce the seepage pressure acting on the slab； 2. Utilize the upstream reinforced concrete deck as a slip resistance plate ； 3. Move the gate position slightly downstream, or extend the bottom plate of the sluice upstream, in order to make better use of part of the water’s weight ； 4. Increase the depth of the tooth wall in the gate chamber floor.

1. Adjust the layout of the superstructure: move the gates backward, lengthen the bottom plate, and increase the water weight. 2. Lengthen the covering slab. 3. Install sheet piles and tooth walls. 4. Install anti-sliding plates.

1. Increase the length of the covering layer, or, without compromising its impermeability and stability, move the drainage facilities closer to the bottom slab of the sluice in order to reduce the seepage pressure acting on that slab. 2. Use the reinforced concrete covering layer upstream as a slip resistance layer. 3. Shift the position of the gates slightly downstream, or extend the bottom slab of the sluice upstream, so as to make better use of part of the water weight. 4. Increase the depth of the toothed walls on the bottom slab of the chamber

Methods to improve anti-slip stability: using an inclined base; methods to improve overturning stability: widening the wall foot, changing the cross-sectional shape of the wall, and altering the slope of the wall face and the back side of the wall. (1) Anti-sliding retaining walls should be installed at the front edge of the landslide. If necessary, it can be used in combination with measures such as drainage, weight reduction, and anchoring. (2) Anti-sliding retaining walls should be designed based on the greater of the remaining sliding force of the landslide and the Coulomb earth pressure; their height and foundation depth shall prevent the sliding mass from slipping over the top of the wall or from moving within the soil layers beneath the foundation. (3) When the foundation depth of anti-sliding retaining walls is large and the stability of the soil is poor, temporary support measures should be taken. The construction must be carried out in stages to ensure the stability of the slope during construction and maintain safety.

Methods to improve anti-slip stability: using an inclined base; methods to improve overturning stability: widening the wall foot, changing the cross-sectional shape of the wall, and altering the slope of the wall face and the back side of the wall. (1) Anti-sliding retaining walls should be installed at the front edge of the landslide. If necessary, it can be used in combination with measures such as drainage, weight reduction, and anchoring. (2) Anti-sliding retaining walls should be designed based on the greater of the remaining sliding force of the landslide and the Coulomb earth pressure; their height and foundation depth shall prevent the sliding mass from slipping over the top of the wall or from moving within the soil layers beneath the foundation. (3) When the foundation depth of anti-sliding retaining walls is large and the stability of the soil is poor, temporary support measures should be taken. The construction must be carried out in stages to ensure the stability of the slope during construction as well as construction safety