Table of Contents
What is a cast in place pile?
Cast-in-place pile construction is the method to complete the piles by placing the concrete after installing the reinforced cage to be arranged on site into bore hole. Cast-in-place pile construction has various methods based on drilling method, pile diameter, pile length, etc.
When should an auger cast pile be used?
Augercast piles can be used in low over-head clearance conditions by adding and then removing segments of auger during drilling. To help ensure continuity of the grouted hole during this process, it is typical (and required by IBC 1810.3.
How do you install auger cast piles?
CFA piles are installed by drilling with a hollow-stem, plugged, continuous-flight auger until a competent layer is reached. After the auger tip reaches the desired depth, concrete or grout is pumped through the hollow stem while, at the same time, the auger is withdrawn from the ground.
How deep do concrete piles go?
What is the maximum depth? With the benefit of using pile joints, precast concrete piles can be driven to lengths longer than 30mx. Often concrete precast piles can be driven down to 30m, however, in special circumstances, such as offshore projects, piles can be driven down to a maximum of 150m.
What is CFA drilling?
Continuous flight augering (CFA), also known as auger cast piling, is a technique used in construction to create a concrete deep foundation. Continuous flight auger has been used in the United Kingdom since 1966, but its use is relatively new in the United States.
How is a precast concrete displacement pile installed?
Piles are driven into the ground using a top driven hydraulic hammer, the hammer drives the piles into the ground which compacts and densifies the surrounding ground. Driven precast concrete piles generate zero spoil as they are a displacement pile, moving the ground beneath the surface.
What is a CFA pile?
Continuous flight auger (CFA) piles are drilled and concreted in one continuous operation enabling much faster installation time than for bored piles. Reinforcement is placed into the wet concrete after casting, enabling the pile to resist the full range of structural loading.
How much does concrete piling cost?
Piles cost about $20 to $60 per linear foot, with a typical minimum cost of $28,000.
How many types of piling are there?
There are three types of pile foundations according to their construction methods which are driven piles, cast-in-situ piles, and driven and cast-in-situ piles.
What is bentonite slurry?
Bentonite slurry is one of the most common excavation fluid used in constructing diaphragm wall. Bentonite clay (in powder form) and water are combined in a colloidal mixer and clay particles bond to each other and set to form a gel when left to stand for a period of time.
Where can I get auger cast piles installed?
American Deep Foundations (ADF) is a trusted source for the installation of auger cast piles. Auger cast piles may also be referred to by many names, such as auger cast in place piles, auger piles, augered piles, augered cast in place piles, continuous flight auger piles, CFA piles or auger pressure grouted piles.
What are the different types of cast piles?
Screw Piles Drilled Displacement (DD) Piles Auger Cast Pile Types Auger cast piles are a type of drilled foundation in which the pile is drilled to the final depth in one continuous process using a continuous flight auger.
What are the different types of auger piles?
Auger Pressure Grout Screw Piles Drilled Displacement (DD) Piles Auger Cast Pile Types Auger cast piles are a type of drilled foundation in which the pile is drilled to the final depth in one continuous process using a continuous flight auger. Auger Cast Piles Auger Cast Pile Types
Are augered cast in place piles economical?
Augered cast in place piles can be very economical under the right conditions. Augercast piles typically cannot be installed closer than six pile diameters until the grout in the adjacent pile has achieved its initial set without approval of the geotechnical engineer.