Micropiles – An Overview Micropiles – An Overview - AGC

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Limitations for Micropiles • Vertical micropiles may be limited in lateral capacity; • Cost effectiveness; • Potential buckling under seismic loading and liquefaction But Need to Consider Methods Available to Quantify and/or Deal With These Limitations
Overview of Micropile Applications Overview of Micropile Applications Ref: FHWA NHI-05-39, Table 3-1 In-Situ Reinforcement [Case 1 and Case 2 Micropiles] (Est 0-5% of world applications) Slope Stabilization And Earth Retention [Case 1 and Case 2] Ground Strengthening [Case 1 and Case 2] Settlement Reduction [Case 2] Structural Stability [Case 2] Structural Support [Case 1 Micropiles] (Est 95% of world applications) Earth Retaining Structure Foundations Foundations For New Structures Underpinning Existing Foundations Seismic Retrofitting Scour Protection Repair/Replace Existing Foundations Stop/Prevent Movement Upgrade Foundation Capacity
Page 1 and 2: Micropiles - An Overview April 1, 2
Page 3 and 4: Definition - Micropile • A small
Page 5 and 6: Micropile Classification System Ref
Page 7 and 8: Case 1 Micropiles (After FHWA NHI-0
Page 9 and 10: Case 2 Micropiles (After FHWA NHI-0
Page 11 and 12: Micropile Classification Based on G
Page 13: Possible Applications of Micropiles
Page 17 and 18: Micropile Installation (After: FHWA
Page 19 and 20: Drilling Techniques May Be Propriet
Page 21 and 22: Drilling Techniques May be propriet
Page 23 and 24: Steel Reinforcement • Steel casin
Page 25 and 26: Footing Connections Compression
Page 27 and 28: Footing Connections Compression and
Page 29 and 30: Footing Connections Compression and
Page 31 and 32: Grouting (Including Post-Grouting)
Page 33 and 34: Grouting Equipment
Page 35 and 36: Foundation Arrangement
Page 37 and 38: Design for Structure Foundations
Page 39 and 40: Basic Design Process Step 1 >>>Eval
Page 41 and 42: Step 4 >>> Prepare Preliminary Desi
Page 43 and 44: Step 8 >>Evaluate Geotechnical Capa
Page 45 and 46: Step 8 >>Evaluate Geotechnical Capa
Page 47 and 48: Design for Lateral Loading • Same
Page 49 and 50: Basic Design Process Step 1>>>Evalu
Page 51 and 52: Load Testing Program • “Verific
Page 53 and 54: QA/QC
Page 55 and 56: QA - During Construction Contractor
Page 57 and 58: Birmingham Bridge Retrofit for Capa
Page 59 and 60: Numa T-150 Eccentric Percussive Dri
Page 61 and 62: Installing Casing
Page 63 and 64: Flushing the Hole Clean During Dril
Page 65 and 66:
Installing Reinforcing Bar with Spa
Page 67 and 68:
Birmingham Bridge Subsurface Profil
Page 69 and 70:
Typical Ultimate ά bond Micropile
Page 71 and 72:
Birmingham Bridge Pier 10N Strength
Page 73 and 74:
Birmingham Bridge Pier 10N Strength
Page 75 and 76:
Thanks to the following for selecte
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Micropiles – An Overview Micropiles – An Overview - AGC

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