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Design and Construction of Driven Pile Foundations

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Design and Construction of Driven Pile Foundations ( design-and-construction-driven-pile-foundations )

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7.3.6.1 Recommended Approach for Downdrag ....... 341 7.3.6.2 Methods for Reducing Downdrag and Drag Force ......................................................... 348 7.3.7 Horizontal Pile Foundation Deflection......................... 351 7.3.7.1 Pile Head Fixity........................................... 353 7.3.7.2 Lateral Design Methods............................... 355 7.3.7.3 p-y Method ................................................. 356 7.3.7.4 Strain Wedge Method.................................. 362 7.3.7.5 Single Piles ................................................ 364 7.3.7.6 Pile Groups ................................................ 364 7.3.7.6.1 Lateral Resistance Increases Through Ground Improvement ........................... 371 7.3.8 Lateral Squeeze of Foundation Soil and Solutions ...... 374 7.3.9 Overall Stability ........................................................ 375 7.4 EXTREME EVENT LIMIT STATES ....................................... 376 7.4.1 Extreme Event Scour During Check Flood.................. 376 7.4.2 Seismic and Seismic Induced Downdrag .................... 377 7.4.2.1 AASHTO Recommendations for the Equivalent Static Seismic Force ................... 378 7.4.2.2 Liquefaction................................................ 382 7.4.3 Ice and Collisions ..................................................... 385 7.4.3.1 Ice Loads ................................................... 386 7.4.3.2 Vehicle Collison .......................................... 387 7.4.3.3 Vessel Collision .......................................... 387 7.4.4 Combined Extreme Events ........................................ 388 7.5 DETERMINATION OF MINIMUM PILE PENETRATION......... 388 7.6 DETERMINATION OF Rndr TO ESTABLISH CONTRACT DRIVING CRITERIA ............................................................ 390 7.7 DRIVABILITY ANALYSIS ..................................................... 391 7.7.1 Factors Affecting Drivability ....................................... 392 7.7.2 Methods for Determining Pile Drivability ..................... 393 7.7.3 Drivability versus Pile Type........................................ 395 7.8 CONSIDERATIONS FOR BATTER PILE DESIGN AND CONSTRUCTION................................................................ 395 7.9 CORROSION AND DETERIORATON................................... 397 7.10 ADDITIONAL DESIGN AND CONSTRUCTION CONSIDERATIONS............................................................. 398 7.10.1 Minimum Pile Spacing, Clearance, and Cap Embedment.............................................................. 398 7.10.1.1 Special Considerations for Large Pile Sizes .. 399 vii

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