Execution Of Pile Load Test

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By: dhruvbhavsar (19 month(s) ago)

Thank You....it was really a good information

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EXECUTION OF PILE LOAD TEST : 

EXECUTION OF PILE LOAD TEST Presented By: HAFIZ ASIF ARSHAD Regt. # 07-MSc-Str-13

OBJECTIVES OF PRESENTATION : 

OBJECTIVES OF PRESENTATION Static axially compressive, load-controlled test Loading applied against kentledge Necessary field observations

STEPS OF PILE LOAD TEST : 

STEPS OF PILE LOAD TEST Construction record Loading arrangements Pile movement measurement Calibrations Loading and unloading Time interval for settlement readings Safety measures

1. CONSTRUCTION RECORD : 

1. CONSTRUCTION RECORD PILE LOCATION should be representative: pile diameter pile length sub-surface conditions pile cut-off level pile construction method

1. CONSTRUCTION RECORD : 

1. CONSTRUCTION RECORD DRILLING RECORD Time consumed Type of drilling Type of drilling fluid Any difficulty during drilling Borehole log GWT depth Use of casing

1. CONSTRUCTION RECORD : 

1. CONSTRUCTION RECORD CONCRETING RECORD Concrete mix ratio and w/c ratio Over consumption Method of concreting Reinforcement details Cylinder test results Any problem during concreting

1. CONSTRUCTION RECORD : 

1. CONSTRUCTION RECORD PILE DIMENSIONS AND SURVEY RECORD Pile cut-off level Pile tip elevation Pile length Pile diameter

2. LOADING ARRANGEMENT : 

2. LOADING ARRANGEMENT Weight Main Girder Secondary Girders Cribbing

2. LOADING ARRANGEMENT : 

2. LOADING ARRANGEMENT WEIGHT Working load for pile Test load for pile Required weight on kentledge Total weight on kentledge Centering of weight Stability/verticality of loading arrangement

2. LOADING ARRANGEMENT : 

2. LOADING ARRANGEMENT SIDE (KENTLEDGE) SUPPORT/CRIBBING Total load on kentledge Cribbing area Bearing pressure > Bearing capacity

2. LOADING ARRANGEMENT : 

2. LOADING ARRANGEMENT SIDE (KENTLEDGE) SUPPORT/CRIBBIBG Cribbing

2. LOADING ARRANGEMENT : 

2. LOADING ARRANGEMENT TEST BEAM(S) Placement Stiffness Bearing plate b/w test beam & jack Centering over pile Connection over cribbing

2. LOADING ARRANGEMENT : 

2. LOADING ARRANGEMENT TEST BEAM(S) Main Girder Bearing Plat Stiffeners

2. LOADING ARRANGEMENT : 

2. LOADING ARRANGEMENT BEARING PLATE Thickness Diameter Grouting Centering Surface smoothness

2. LOADING ARRANGEMENT : 

2. LOADING ARRANGEMENT BEARING PALTE Bearing Plat Bearing Plat Thickness

2. LOADING ARRANGEMENT : 

2. LOADING ARRANGEMENT HYDRAULIC JACK Piston diameter Centering Verticality Capacity Max piston travel Calibration Sensitivity Condition of hydraulic jack

2. LOADING ARRANGEMENT : 

2. LOADING ARRANGEMENT Hydraulic Jack Hydraulic Jack Piston Travel Centering of Jack

2. LOADING ARRANGEMENT : 

2. LOADING ARRANGEMENT Hydraulic Jack Pressure Gage

3. MOVEMENT MEASUREMENT : 

3. MOVEMENT MEASUREMENT REFERENCE BEAM Placement Support distance One end free to move Rigidity Glass plate for dial gauges

3. MOVEMENT MEASUREMENT : 

3. MOVEMENT MEASUREMENT Reference Beam Reference Beams Free End Condition Pin End Condition Rigid Section

3. MOVEMENT MEASUREMENT : 

3. MOVEMENT MEASUREMENT DIAL GAUGES Numbers Travel Precision Check dial gauges mechanism Gauges marked as numbers Gauge mounting

3. MOVEMENT MEASUREMENT : 

3. MOVEMENT MEASUREMENT Dial Gages Dial Gauges 3 or C 2 or B 1 or A

STEPS OF PILE LOAD TEST : 

STEPS OF PILE LOAD TEST Construction record Loading arrangements Pile movement measurement Calibrations Loading and unloading Time interval for settlement readings Safety measures

4. CALIBRATIONS : 

4. CALIBRATIONS Calibration of dial gages Calibration of pressure gages Calibration of hydraulic jack

4. CALIBRATIONS : 

4. CALIBRATIONS Calibration of Dial Gages

4. CALIBRATIONS : 

4. CALIBRATIONS Calibration of Pressure Gages

5. LOADING AND UNLOADING : 

5. LOADING AND UNLOADING Loading increments should be 25% of design load Unloading decrement should be 25% of test load

6. TIME INTERVAL FOR SETTLEMENT READINGS : 

6. TIME INTERVAL FOR SETTLEMENT READINGS During increments: after 5 min for 1st half hour after 10 min for 2nd half hour During full load sustaining: after each half an hour

6. TIME INTERVAL FOR SETTLEMENT READINGS : 

6. TIME INTERVAL FOR SETTLEMENT READINGS During decrements: after 5 min for 1st half hour after 10 min for 2nd half hour During zero load sustaining: after each half an hour

FIELD OBSERVATIONS PERFORMA : 

FIELD OBSERVATIONS PERFORMA

7. SAFETY MASURES : 

7. SAFETY MASURES Remove scrap and debris etc Remove snow, oil, greece like substances Loading should be centered Monitoring of the loading system Only authorized persons to enter in test area

REFERENCES : 

REFERENCES ASTM D-1143-81 (1994) “Foundation Analysis and Design” by Joseph E. Bowles “Principle of Foundation Engineering” by Braja M. Das

THANKS : 

THANKS