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Foundation Improvement Evaluation

Foundation Improvement Evaluation. A Major Qualifying Project for Stantec Consulting Services Inc . Michael Kendall Karyn Sutter. Kentucky River Lock and Dam No. 8. Worcester Polytechnic Institute Civil and Environmental Engineering. Major Qualifying Project Stantec Project Center

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Foundation Improvement Evaluation

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  1. Foundation Improvement Evaluation A Major Qualifying Project for Stantec Consulting Services Inc. Michael Kendall Karyn Sutter Kentucky River Lock and Dam No. 8

  2. Worcester Polytechnic Institute Civil and Environmental Engineering • Major Qualifying Project • Stantec Project Center • Project Advisors • Professor Suzanne LePage • Professor Frederick Hart • Stantec Consulting Service Inc. Mentors • Daniel Gilbert • April Welshans • Adam Hacker

  3. Problem Statement • LD 8 Foundation Improvement • Karst Features • Water Quantity and Quality Concerns • Foundation Stability

  4. Project Scope • Evaluate Existing Dam Conditions • Develop Design Options • Apply Evaluation Criteria to Design Options • Create a Preliminary Design of Best Foundation Improvement Option

  5. Kentucky River Lock and Dam No. 8

  6. Site Geology • Boring Layout • Water Pressure Tests Exploratory Borings by Geological Region

  7. Background: Grouting • Materials • Portland Cement • Admixtures • Design Techniques • Grout Curtain • Grout Cap

  8. Background: Cut-off Walls Secant Walls Diaphragm Walls

  9. Methodology • Design Selection • Evaluated Existing Conditions • Developed Three Design Options Design Options

  10. Methodology • Application of Evaluation Criteria • Cost • Environmental • Permitting • Risks • Reduction in Seepage • Foundation Damage • Constructability • Dewatering • Site Access • Design Creation

  11. Results: Curtain and Cut-off Depth Each Secant Shaft Designed with a 4 Ft. Diameter with a 1 Ft. Overlap on Each Side Two Row Curtain with 16 Ft. Space Between Rows and Injection Holes every 6 Ft. Grouting Cut-off Walls

  12. Results: Evaluation Criteria • Cost Design Option Costs

  13. Results: Evaluation Criteria • Environmental • Identical Permitting Requirements • Risks • Mostly Dependant on Grouting • Seepage Reduction Crucial • Constructability • All Designs Practical • Verifiability of Technique

  14. Capstone Design Project • Selected Design 2: Grout Curtain Throughout with a Secant Wall in Region 2 Design of Proposed Foundation Improvement

  15. Conclusions • Highest Water Loss Observed through Region Two • Favorable Cost to Permeability Reduction Ratio • Practical Design

  16. Questions?

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