T14 Ranney Well Engineering Study

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T14 Ranney Well Engineering Study

• Client Eli Lilly and Company
• Submitted by RBC Consulting
• September 16, 2009

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RBC Consulting
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Project Description

• Eli Lilly and Company
• T14 Ranney Well
• Primary water source
• Problem
• Differential Settlement
• Formation of Cracks

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Design Requirements

• Failure Determination
• Design Documentation
• Design Alternatives/Solutions
• Final Report
• Written
• Oral

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Project Approach

• Site Survey
• Soil Borings
• Failure Analysis
• Geotechnical
• Structural
• Hydrologic
• Design Alternatives/Recommendations

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Site Survey

• Performed on March 28, 2001
• Topographic Map

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Soil Borings

• Taken December 26 - 29, 2000
• Alt Witzig Engineering

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Soil Borings (cont.)

• Tests
• Stnadard Penetration Tests (SPT) at 2.5 ft
  intervals
• Atterburg Limits
• Moisture Content
• Density Determination
• Unconfined Compressive Strength
• Grain Size Analysis
• Unified Soil Classification

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Failure Analysis
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Typical Ranney Well
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Typical Ranney Well(profile)

• Well Caisson serves as the primary foundation
• Bearing below radial collection system

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T-14 Ranney Well

• Two foundations
• Well Caisson
• Chlorine Caisson
• Bearing for chlorine caisson above radial
  collection system

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T-14 Ranney Well (cont.)

• Aquifer consists of thick layer of fine, poorly
  graded sand
• From Grain Size Analysis - at 60 ft depth, 100
  passing No. 6 sieve

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Failure of T-14 Ranney Well

• Undermining causing settlement and unbalanced
  loading
• Unbalanced loading creating shear stress
  evidence by cracking

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Crack Pattern
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Design Alternaives

• Hydraulic Jack Support
• Support through H-Piles
• Compaction Grouting
• Complete Separation
• Joint Replacement/New Construction

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Design Recommendation

• Replace exposed section of pipe
• Install flexible joints at each end of the pipe
• Approximate cost 3200
• Plan for the construction of a new water
  collection system

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Conclusion

• Project Description
• Design Requirements
• Project Approach
• Failure Analysis
• Design Alternatives
• Design Recommendations
• Questions?