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Foundation Systems and Services

Farrell specializes in proven, design-build, Ground Improvement Support and Deep Foundation Pile solutions.  Farrell also provides design-build excavation support solutions, foundation design peer review, and specialty ground improvement and pile design services.  Proven Foundation Solutions include:

Auger Cast Pile & Drill Displacement Pile

Auger Cast Column & Drill Displacement Column

Compacted Aggregate Pier & Compacted Soil Column

Vibro Stone Column & Vibro Displacement Column

Rapid Impact Compaction & Rapid Vibro Compaction

Drilled Pipe Piles & Helical Piles

ACP/DDP

14, 16, 18, 24 in dia

20 – 100 ft deep

ACC/DDC

14, 16, 18, 24 in dia

10 – 80 ft deep

CAP/CSC

18, 24, 30 in dia

6 – 32 ft deep

VSC/VDC

18 – 48 in dia

14 – 58 ft deep

RIC/RVC

5 – 8 ft dia

6 – 48 ft deep

DPP/MP/HP

4 – 14 in dia

10 – 150 ft deep

ACP/DDP

Sand (SP, SM, SC)

Silt (ML, MH)

Clay (CL, CH)

Contaminated Soil – DDP

Undocumented Fill

ACC/DDC

Contaminated Soil – DDP

Sand (SP, SM, SC)

Silt (ML, MH)

Clay (CL, CH)

Undocumented Fill

CAP/CSC

Silt (ML, MH)

Clay (CL, CH)

Clayey Sand (SC)

Silty Sand (SM)

Undocumented Fill

VSC/VDC

Poorly Graded Sand (SP)

Silty Sand (SM)

Silt (ML)

Clayey Sand (SC)

Undocumented Fill

RIC/RVC

Sand (SP, SM, SC)

Sand – Gravel mixtures

Silt (ML, MH)

Undocumented Fill

Contaminated Soil

DPP/MP/HP

Sand (SP, SM, SC)

Silt (ML, MH)

Clay (CL, CH)

Bedrock

Contaminated Soil HP

ACP/DDP

100 – 800+ kips

ACC/DDC

4,000 – 14,000 psf

CAP/CSC

4,000 – 9,000 psf

VSC/VDC

4,000 – 8,000 psf

RIC/RVC

2,000 – 8,000 psf

DPP/MP/HP

20 – 250+ kips

ACP/DDP

Deep pile with ground improvement – DDP

High capacity

No vibration

Low spoil – DDP

Steel reinforcement

CBC compliant

ACC/DDC

High stiffness & High capacity – Type 2

No vibration

Low spoil – DDC

Uplift-tension hold-down

Well defined concrete / grout column

Liquefaction mitigation

CAP/CSC

Cost effective support

Readily available material – CAP

LEED opportunity

Re-use onsite soil – CSC

High bearing capacity

Uplift-tension hold-down

VSC/VDC

Liquefaction mitigation

Densification

CBC/SP117 compliant

Use for confinement

Low spoil

No casing

RIC/RVC

Highly cost effective

Liquefaction mitigation

Densification

Use for confinement

Fast install process

No spoil

DPP/MP/HP

Small equipment for tight access

Ideal for repair/retrofit

Minimal site impact

Low spoil – HP

No vibrations

CBC Compliant

ACP/DDP

Deep pile

Engineered grout

Low spoil – DDP

Concrete cleanup

Flat stable pad

Pile connections

ACC/DDC

Impermeable

Rigid inclusion

Gravel cushion

Grout with low spoil

Concrete cleanup

Flat stable pad

CAP/CSC

Vibration system

Requires confinement in liquefiable layers

Spoil haul-off –  CAP

Semi-rigid inclusion

Casing

Moderate depth limit

VSC/VDC

Vibration system

Requires confinement in liquefiable layers

Soft clay need grout

Big operation for small site

No work next to buildings

RIC/RVC

Vibrations at
30 ft

Pad grading

Import needed

Shallow depth – RIC

High noise – RIC

DPP/MP/HP

High material cost

Steel below water

Pile connections

Need access

ACP/DDP

Auger pressure grouted piles

CFA Piles

Driven piles

Concrete piers

Torque/pipe piles

ACC/DDC

Rigid inclusions

Concrete piers

Driven piles

Geopier®

Soil mix columns

CAP/CSC

Overex/replace

Concrete piers

Driven piles

Geopier®

Soil mix columns

VSC/VDC

Overex/replace

Concrete piers

Driven piles

Geopier®

Soil mix columns

RIC/RVC

Deep dynamic compaction

Overex/replace

Geopier®

Resonant compaction

DPP/MP/HP

Torque piles

Pipe piles

Concrete piers

Driven piles

Soil nails/tiebacks