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DRILLING PILE CONSTRUCTION METHODS

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DSP
Remains at the bottomsharp tip
FDP "Lost bit"

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FDP
Full Displacement piles

FDP Piling

FDP
Full Displacement piles
“Lost bit
"

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Kelly-Casing

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CFA
Continuous Flight auger

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CCFA
Cased CFA drops

Kelly construction technology

Kelly

The classic system of bored piles - using a telescopic Kelly bar,

the wall of the borehole is strengthened with a special casing pipe. The pipe is  pushed into the well and the well is cleaned to the design depth mark. In the cleaned well is immersed a reinforcement frame is made specially for the borehole and the borehole is filled with concrete.
When the borehole is completely filled with concrete, the casing pipes are pulled out and the borehole is proportionally filled with the remaining concrete.

Diametrs: 620 / 750 / 880 / 1000 / 1180 / 1200 / 1300 / 1500 / 1800 / 2000mm      _cc781905-5cde -3194-bb3b-136bad5cf58d_Length: 96 m

Pile testing Kelly Pile

Advantages:

  • Can be used on all types of soil.

  • It is possible to make bored piles both standing alone and bored pile walls.

  • No vibrations occur during drilling.

  • Thanks to the casing pipe, the walls of the boreholes are protected from the mutual mixing of landslides and soil layers.

  • It allows you to visually compare the composition of the drilled soil with that specified in the project.

CFA

Single Column Mixing (SCM Pile)

The SCM method is the most common single pile drilling method.
During drilling to the intended depth, the drill bit is rotated and pushed into the ground at a certain speed.
After taking the drill out of the hole, it is filled with concrete. When the hole is completely filled with concrete, a reinforcement frame specially designed for the hole is pressed into it. Thanks to BAUER technology, we are able to drill holes in various types of soil.

Diameter: 450 / 550 / 600 / 750 / 880 / 1000 / 1200 mm
Length: 31 m

Pile Testing - CFA Pile

Advantages:

  • Can be used on almost all soil types

  • High efficiency of drilling piles

  • No vibrations occur during drilling

  • Concreting of piles is done by pressure from the bottom of the borehole

  • Depending on the type of soil, the length of the applied reinforcement frames can reach up to 18 m

Continuous Flight Auger Pile (CFA Pile)

The CFA method is the most common single pile drilling method.
During drilling to the intended depth, the drill bit is rotated and pushed into the ground at a certain speed.
After taking the drill out of the hole, it is filled with concrete. When the hole is completely filled with concrete, a reinforcement frame specially designed for the hole is pressed into it. Thanks to BAUER technology, we are able to drill holes in various types of soil.

Diameter: 450 / 550 / 600 / 750 / 880 / 1000 / 1200 mm
Length: 31 m

Pile Testing - CFA Pile

Advantages:

  • Can be used on almost all soil types

  • High efficiency of drilling piles

  • No vibrations occur during drilling

  • Concreting of piles is done by pressure from the bottom of the borehole

  • Depending on the type of soil, the length of the applied reinforcement frames can reach up to 18 m

Cased Continuous Flight Auger Pile (CCFA) System

CCFA

Construction of bored piles and bored pile walls with continuous auger and casing CCFA. Compared to traditional systems with fully bored Kelly piles or standard CFA construction techniques, the CCFA system has advantages in terms of cost and time.
Improved installation times and vertical tolerance.
Thanks to the casing pipe, the walls of the boreholes are protected from the mutual mixing of landslides and soil layers.
Consistent execution of drilling and concreting processes using auxiliary systems. Reduced concrete consumption due to pile concreting
occurs with pressure from the bottom of the well.

Diameter: 420 / 510 / 620 / 710 / 750 / 880 / 1000 mm
Length: 22.9 m

Bored Pile CCFA

Advantages:

  • Can be used on all types of soil

  • No vibrations occur during drilling

  • High efficiency of drilling piles

  • Drilling can be used in hard-to-reach places

  • The possibility of making bored piles both standing alone,
    both pile walls.

Full Displacement Pile (FDP) System

FDP

Making FDP Drilled Piles Without Subsoil Removal - Drilling occurs due to torque and compression force. The soil is loosened with a drilling tool and pushed out to the side of the hole.In a borehole with a specially placed reinforcement frame, pile concreting takes place with FDP special tools, feeding concrete under pressure from the bottom of the borehole.

 

Diameter: 320 / 410 / 450 / 520 / 620 mm

Length: 40.2 m​

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Advantages:

  • Provides the possibility to install piles without removing the soil

  • It is recommended to use in soils where soil resistance
    under the cone qc is lower than the nominal value of 10 MPa

  • No vibrations occur during drilling

  • High efficiency of drilling piles

  • Thanks to the fact that drilling takes place without removing the soil, the construction site remains clean

  • Minimal overconsumption of concrete

  • Increased bearing capacity of piles

  • Possibility to change the length of the piles during the construction process

  • Concreting of piles is done by pressure from the bottom of the borehole

  • Depending on the soil, the length of the applied reinforcement frames can reach up to 18 m.

Full Displacement Piling (FDP - Lost Bit System) or known as
DSP - drilling with a push-in pile system

Lost bit

Production of bored piles without removal of soil FDP - "Lost bit" (DSP) with a bit remaining in the soil. FDP - "Lost bit" technology is also known as Drilling with a driven pile system DSP - occurs thanks to

for torque and compression force.

The soil is loosened with the FDP/DSP drilling tool (with a bit) and pushed out on the sides of the hole. Using a telescoping Kelly rod and with controlled pressure, the FDP/DSP tool is drilled into the ground to the design depth mark. Then the reinforcement frame is inserted into the DSP tool (casing tube with a closed end), which can be both full and partial length of the pile.

Using FDP - "Lost bit" tool, the "Lost bit" tip is left in the hole and the hole is filled by feeding concrete with pressure from the bottom of the well.

FDP – “Lost bit” (DSP) it is possible to build piles in different soil types, including clay, sediments, peat, sand, moraine. Construction of DSP piles is also possible in dense sand up to bedrock.

Diameter: 510 / 550 / 620 / 710 mm
Length: 40.2 m

Bored Pile Lost Bit
Bored Pile Lost Bit

Advantages:

  • Provides the possibility to install piles without removing the soil

  • It is recommended to use in soils where soil resistance
    under the cone qc is lower than the nominal value of 10 MPa

  • No vibrations occur during drilling

  • High bore pile
    manufacturing efficiency

  • Minimal overconsumption of concrete

  • Increased bearing capacity of piles

  • It is possible to apply the reinforcement frame along the full length of the pile

  • Possibility to change the length of the piles during the construction process

  • High construction productivity

  • An increase in the bearing capacity of the pile due to soil compaction and friction of the pile with the soil;

Front-of-wall (FoW) technology

Thanks to the special design of the two rotating heads,Front-of-wallmethod (FoW) allows drilling very close to buildings with a minimum distance, thus saving valuable space, especially in urban environments, between existing buildings. The device has no obtrusive edges that extend beyond the diameter of the case. The FoW method is a vibration-free and quiet piling  method. The mounting equipment is the same as the CCFA system.

CONTACTS

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SIA TILTS

Registration number: 50103005351

Address: Spilves iela 18, Riga, LV 1055, Latvia

Bank: OP Corporate Bank plc Latvia

SWIFT code: OKOYLV2X

Bank account number: LV82OKOY0005100035077

To receive a price offer for your individual project, please contact our specialists by phone or e-mail.

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