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Question Number 2 and 3 required hand calculation.

Question Number 2 and 3 required hand calculation.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question Number 2 and 3 required hand calculation.
Earth Dam 100 900 750 Soil Layer 1 Soil Layer 2 Soil Layer 3 Bedrock Problem: An Earth Dam, as presented in the above figure, is proposed on layered soil to store water which will be utilized for the hydroelectric project. Based on the hydrological analysis, for successful operation of the hydroclectric project, the combined seepage loose through the dam and foundation must be less than 1000 gallon/day. You are hired as a geotechnical engineer to conduct the seepage analysis of the Dam site. The soil parameters are listed in Table 1. Table 1. Soil Properties Soil Soil Type Cohesion, c Friction Unit Weight, Ver. Permeability, Hor. Permeability, Layers (psf) Angle, k, kh (Ib/ft') (cm/sec) (cm/sec) Earth Silty Clay 500 13 130 1x106 1х106 Dam FDN Fine Sand 35 120 0.1 0.1 Layer 1 FDN Silt 400 10 125 4x105 4x105 Layer 2 FDN Medium 750 17 130 4x109 4x10 | Layer 3 Clay *FDN = Foundation As a geotechnical engineer, your job is to conduct the following task using Flow Net Method. You can use analytical methods (hand calculation) OR numerical methods (SEEP/W, PLAXIS, etc.) OR both type of analysis. 1. Develop the flow of the proposed Earth Dam and Foundation soil. Conduct the seepage analysis of the proposed Earth Dam and the foundation soil. Determine if the seepage volume is within the limit. 2. Check the uplift force and if the proposed design is adequate for uplift? 3. Determine the factor of safety against piping failure of the proposed Dam section. 4. Provide an alternative design of the dam and revisc the initial flow net, if necessary. The geometry of the Earth Dam need to constant in vour alternative design however, you may propose the measure within Earth Dam and/or foundation to limit the seepage as well as to increase the factor of safety against uplift and piping. The alternative design must limit the seepage loss < 1000 gallon/day and should be safe against the uplift and piping failure with adequate factor of safety. 5. Prepare a final report summarizing all your work. Include all the detail calculations of the proposed Dam sections and alternative design in your report.
Transcribed Image Text:Earth Dam 100 900 750 Soil Layer 1 Soil Layer 2 Soil Layer 3 Bedrock Problem: An Earth Dam, as presented in the above figure, is proposed on layered soil to store water which will be utilized for the hydroelectric project. Based on the hydrological analysis, for successful operation of the hydroclectric project, the combined seepage loose through the dam and foundation must be less than 1000 gallon/day. You are hired as a geotechnical engineer to conduct the seepage analysis of the Dam site. The soil parameters are listed in Table 1. Table 1. Soil Properties Soil Soil Type Cohesion, c Friction Unit Weight, Ver. Permeability, Hor. Permeability, Layers (psf) Angle, k, kh (Ib/ft') (cm/sec) (cm/sec) Earth Silty Clay 500 13 130 1x106 1х106 Dam FDN Fine Sand 35 120 0.1 0.1 Layer 1 FDN Silt 400 10 125 4x105 4x105 Layer 2 FDN Medium 750 17 130 4x109 4x10 | Layer 3 Clay *FDN = Foundation As a geotechnical engineer, your job is to conduct the following task using Flow Net Method. You can use analytical methods (hand calculation) OR numerical methods (SEEP/W, PLAXIS, etc.) OR both type of analysis. 1. Develop the flow of the proposed Earth Dam and Foundation soil. Conduct the seepage analysis of the proposed Earth Dam and the foundation soil. Determine if the seepage volume is within the limit. 2. Check the uplift force and if the proposed design is adequate for uplift? 3. Determine the factor of safety against piping failure of the proposed Dam section. 4. Provide an alternative design of the dam and revisc the initial flow net, if necessary. The geometry of the Earth Dam need to constant in vour alternative design however, you may propose the measure within Earth Dam and/or foundation to limit the seepage as well as to increase the factor of safety against uplift and piping. The alternative design must limit the seepage loss < 1000 gallon/day and should be safe against the uplift and piping failure with adequate factor of safety. 5. Prepare a final report summarizing all your work. Include all the detail calculations of the proposed Dam sections and alternative design in your report.
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