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Geotechnical Engineering

 

Drilled Shaft Construction & Pay Summary

(pdf, 21 kb.)

Project Name
 
Page
  of  
FIN Project No.
 
Pier No.
 
Contractor
 
Shaft No.
 
Inspected By
  Date  
Station
 
Approved By
  Date  
Offset
 

Type of Construction Casing
  Dry   Wet/Drill mud only   None
  Wet/Casing only   Wet/Drill mud and casing   Removed
    Permanent
Notes
 

Construction Activity Time Date
(mm/dd/yy)
Shaft Details Plan Built
Set Casing     Shaft Top El. ST    
Begin Excavation (Below Casing)     Casing Top El. CT    
Begin Soil Excavation     Water Table El. WT    
Finish Soil Excavation     Perm. Casing ID CID    
Beg. Rock Excav.     Perm. Casing OD COD    
Fin. Rock Excav.     Ground Surf. El. GS    
Rock Core Taken     Casing Bot. El. CB    
Overream     Shaft Diameter SD    
Init. Inspection     Top of Rock El. RT    
Fin. Inspection     Rk. Core Top El. RCT    
Beg. Concrete Pl.     Rock Core Dia. RCD    
Fin. Concerte Pl.     Rock Socket Dia. RD    
Constr. Complete     Overream Top El. OT    
      Overream Bot. El. OB    
      Shaft Bottom El. SB    
      Rk Core Bot. El. RCB    

  Length
Provided
(ft)/(m)
Length
Adjustment
(ft)/(m)
Pay Length
(ft)/(m)
Notes
Permanent Casing CT-CB        
Soil Excavation GS-RT        
Rock Excavation RT-SB        
Extra Depth Excavation (SBplan-SBbuilt)          
Overream Length OT-OB        
Drilled Shaft Length ST-SB        
Rock Core Length RCT-RCB        
           
           

Adjustments
Soil Excavation = (GS - RT) x (SBplan - SBbuilt)/(SBplan) =  
Rock Excavation = (RT - SB) x (RDplan - RDbuilt)/(RDplan) =  
Drilled Shaft Length = Excavation Adjustments + Any Other Adjustments

TOC

PDF files can be viewed with the Acrobat® Reader®
Updated: 04/07/2011

FHWA
United States Department of Transportation - Federal Highway Administration