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Bearing Capacity of a Strip Footing Situated on Reinforced Cohesionless Soil Slope Using Non-Associated Flow Rule
The influence of soil dilatancy on the bearing capacity of a surface strip footing, situated on the edge of the reinforced cohesionless soil slope, is investigated by incorporating a non-associated flow rule in lower bound finite elements limit analysis. A single layer of reinforcement is laid at various depths below the base of the footing. The improvement in the bearing capacity of the strip footing is expressed by an efficiency factor which is the ratio between the obtained values of bearing capacity factor associated with the unit weight of soil for reinforced and unreinforced slopes. The variation between the efficiency factor and depth of placement of the reinforcement layer are presented as a series of design charts for various combinations of slope angle, soil friction angle, and dilative coefficient. By keeping other parameters as constant, the efficacy of reinforcement layer increases up to a certain depth of placement of the reinforcement layer, after that it reduces. The design charts indicate that the reinforcing efficiency enhances with an increase in the value of dilative coefficient. It is found that as the value of slope inclination and friction angle of the slope fill increases, the efficiency factor also enhances. Failure patterns are also provided for few representative cases.
Bearing Capacity of a Strip Footing Situated on Reinforced Cohesionless Soil Slope Using Non-Associated Flow Rule
The influence of soil dilatancy on the bearing capacity of a surface strip footing, situated on the edge of the reinforced cohesionless soil slope, is investigated by incorporating a non-associated flow rule in lower bound finite elements limit analysis. A single layer of reinforcement is laid at various depths below the base of the footing. The improvement in the bearing capacity of the strip footing is expressed by an efficiency factor which is the ratio between the obtained values of bearing capacity factor associated with the unit weight of soil for reinforced and unreinforced slopes. The variation between the efficiency factor and depth of placement of the reinforcement layer are presented as a series of design charts for various combinations of slope angle, soil friction angle, and dilative coefficient. By keeping other parameters as constant, the efficacy of reinforcement layer increases up to a certain depth of placement of the reinforcement layer, after that it reduces. The design charts indicate that the reinforcing efficiency enhances with an increase in the value of dilative coefficient. It is found that as the value of slope inclination and friction angle of the slope fill increases, the efficiency factor also enhances. Failure patterns are also provided for few representative cases.
Bearing Capacity of a Strip Footing Situated on Reinforced Cohesionless Soil Slope Using Non-Associated Flow Rule
Halder, K. (author) / Chakraborty, D. (author)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 135-144
2019-03-21
Conference paper
Electronic Resource
English
| British Library Conference Proceedings | 2019
| British Library Conference Proceedings | 2018