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Micro Piles |
Pressure Grouting |
Rock Anchors |
Permeation Grouting
Soil Nailing |
Compaction Grouting |
Micropiles |
Injection Grouting |
Chemical Grouting
Our
techniques apply when adding new structures:
especially
rock anchor,
microfine cement,
soil nailing,
micropile
installations for
foundation support.
We
specialize in
slope stabilization,
anchors,
permeation grouting,
foundation repair
and support,
grouting,
soil nails,
rock drilling,
micropile installations, and
sinkholes. We
use a
problem-solving approach geotechnical
architecture of buildings, bridges,
water plants, sewage plants, tunnels,
sinkholes,
caisson,
shoring,
underpinning,
agriculture, and
roads
construction. We
are experienced in these applications:
micro piles,
sinkhole repair,
permeation grouting, pressure
grout,
soil nails,
chemical grouting,
micropiles,
compaction grout, and
rock anchors.
Our specialties are
rock anchor,
acrylamide and
compaction grouting,
mini piles,
sinkhole repair,
micropiles,
acrylamide grouting, and
soil nailing.
We will continue to
dedicate ourselves to
excellence,
including
insurance mortgage, in our performance, in our
integrity, and in our relationships with our
customers. We will carefully weigh our
decisions, actions, and results to make sure
that we remain the most trusted name in the
geotechnical contracting industry. Please
visit our website
http://www.rembco.com/.
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Driven Piles
JULY
1997
7-5
TERM
DEFINITION
Anvil The bottom part of a hammer which receives the impact of the ram and transmits the energy to the pile.
Butt of Pile The term commonly used in conjunction with the timber piles—the upper or larger end of the pile, the
end closest to the hammer.
Cushion Blocks Usually plywood pads placed on top of precast concrete piles to eliminate spalling.
Cushion Pad A pad of resilient material or hardwood placed between the helmet and drive cap adapter.
Drive Cap Adapter A steel unit designed to connect specific type of pile to a specific hammer. It is usually connected to the
hammer by steel cables.
Drive Cap Insert The unit that fits over the top of pile, holding it in line and connecting it to the adapter.
Drive Cap System The assembled components used to connect and transfer the energy from the hammer to the pile.
Follower An extension used between the pile and the hammer that transmits blows to the pile when the pile head
is either below the reach of the hammer (below the guides/leads) or under water. A follower is usually a
section of pipe or “H” pile with connections that match both the pile hammer and the pile. Since the
follower may absorb a percentage of the energy of the hammer, the Standard Specifications
(Section 49.1.05) require the first pile in any location be driven without the use of a follower so as to be
able to make comparisons with operations utilizing a follower. In water, the first pile to be driven should
be one sufficiently long to negate the need for the follower. The information from the first pile can be
used as base information when using the follower on the rest of the piling. Beware of soil strata which
may change throughout the length of a footing. Underwater hammers and extensions to the leads can
be used as alternatives to driving with a follower.
Hammer Energy The amount of potential energy available to be transmitted from the hammer to the pile. Usually
measured in foot-pounds.
Leads A wooden or steel frame with one two parallel members for guiding the hammer and piles in the correct
alignment. There are three basic types of leads:
• Fixed, which are fixed to the pile rig at the top and bottom. Refer to Figure 7-4.
• Swinging, which are supported at the top by a cable attached to the crane. Refer to Figure 7-5.
• Semi-Fixed or Telescopic, which are allowed to translate vertically with relation to the
boom tip. Refer to Figure 7-6.
Mandrel A full length steel core set inside a thin-shell casing for cast-in-place concrete piles. This assists in
maintaining pile alignment and preventing the shell from collapsing. It is removed after driving is
completed.
Moonbeam A device attached to the end of a lead brace which will allow a pile to be driven with a side batter.
Penetration The downward movement of the pile per blow.
Pile Butt A member of the pile crew other than the operator and oiler.
Pile Gate A hinged section attached to the pile leads, at the lower end, which acts to keep the pile within the
framework of the pile leads.
Pile Hammer The unit which develops the energy used to drive piles, the two main parts of which are the ram and the
anvil.
Pile Rig The crane used to support the leads and pile driving assembly during the driving operation.
Ram
The moving part of the pile hammer, consisting of a piston and a driving head, or driving head only.
Rated Speed The number of blows per minute of the hammer when operating at a particular maximum efficiency.
Spudding Spudding is the driving of a short and stout section of pile-like material into the ground to punch
through or break up a hard ground strata to permit pile driving. Used extensively in the driving of timber
piles.
Striker Plate A steel plate place immediately below the anvil. Also known as an anvil.
Stroke The length of fall of the ram.
Tip of Pile The first part of the pile to enter the ground.