《基础工程》课程PPT教学课件（英文讲稿）Chapter 10 Single Piles（1/2）

Chapter 10 Single Pile-Static Capacity and Lateral Loads;Pile/Pile Bucking Dile cop Sofl clay Piles Raker pile (Bater Bile) Sand

Chapter 10 Single Pile-Static Capacity and Lateral Loads; Pile/Pile Bucking

Introduction What's pile? The purposes of piles ·Piles are structural To carry the superstructure members of timber, loads into or through a soil concrete,and/or steel that stratum are used to transmit To resist uplift,or overturning, surface loads to lower forces levels in the soil mass. ·To compact loose, cohesionless deposits This transfer may be by To control settlements vertical distribution of the To stiffen the soil beneath load along the pile shaft or machine foundation a direct application of load As an additional safety to a lower stratum through factor(if scour is a potential the pile point problem) The type of piles In offshore construction Frictional (or floating)pile 。End-bearing pile

Introduction – What’s pile? • Piles are structural members of timber, concrete, and/or steel that are used to transmit surface loads to lower levels in the soil mass. • This transfer may be by vertical distribution of the load along the pile shaft or a direct application of load to a lower stratum through the pile point – The type of piles • Frictional (or floating) pile • End-bearing pile – The purposes of piles • To carry the superstructure loads into or through a soil stratum • To resist uplift, or overturning, forces • To compact loose, cohesionless deposits • To control settlements • To stiffen the soil beneath machine foundation • As an additional safety factor(if scour is a potential problem) • In offshore construction

Examples of Pile Foundation Damping Compaction piles

Examples of Pile Foundation

Offshore Structures on Piles loading sleel pipe piles 10-2。m

Offshore Structures on Piles

Classification of Piles ·According to the ·According to the material: installation: Precast piles Timber pile ·Driven piles Steel pile ·Jacked-down piles ·Inserting piles Concrete pile Cast-in-place piles Concrete-filled steel ·Bored piles pipe pile ·Excavated piles Auger-placed pressure- -Composite pile injected piles ·Screw piles

Classification of Piles • According to the material: – Timber pile – Steel pile – Concrete pile – Concrete-filled steel pipe pile – Composite pile • According to the installation: – Precast piles • Driven piles • Jacked-down piles • Inserting piles – Cast-in-place piles • Bored piles • Excavated piles • Auger-placed pressure￾injected piles • Screw piles

Pile Foundations Concrete

Pile Foundations

Pile Types displocemen! Precasl concrete piles ·(Non prestressed pre. stressed) .Timber piles Driven 'cast-u-place piles [fronty 2aymand Monotube elc)】 Smoll dsplacement ·5teel4 piles piles ·pipe pilds Copen-endc Box piles Screco piles Non-displacement.Bored piles piles Ccased uncosed

Pile Types