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Typical reinforcement is 8 pre-tensioned steel strands of 0.5” section as longitudinal reinforcement and transverse reinforcement made up of rings of 6 to 10 cm. diameter at the ends of the pile.
Pre-tensioned, pre-fabricated piles are especially suitable for installation in very soft soils where significant tensile stress may be exerted during pile driving.
Applications:
Structures (bridges and viaducts)
Multi-storey buildings or edifices in seismic areas where foundations are subjected to significant buckling stress.
Structures and buildings where the lowest elevation is below the water table, so that the piles are subjected to tensile stress due to under-pressure.
Retention of earthwork embankments, basements, etc., (pile wall).
Industrial buildings with significant horizontal or buckling stress.
As for Prefabricated Reinforced Piles, the quality of these Pre-tensioned Pre-fabricated piles is monitored both at the factory and on the building site (PDA, static and dynamic load testing, vibration control).
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TERRA pre-fabricated piles are capable of handling vertical compression stresses of around 12.5 N/mm2 (NTE, CPP-78) or 0.3 * fck (Technical Building Code, Basic Document SE-C, 2006), as they are Category 1 piles that are prefabricated under strict control in permanent installations.
In all cases they are made of concrete with minimum resistance properties of 45 N/mm2.
Likewise, I 52,5 N/SR (RC-03) cement is always used, which makes the piles resistant to sulphates and seawater.
Both the manufacture and on-site driving of our piles are separately guaranteed by AENOR Quality Assurance certification (UNE-EN ISO standards 9001:2000 and UNE-EN ISO standard 9002:1994).
TERRA prefabricated piles are systematically monitored during their manufacture (raw material reception, resistance and geometry, manufacture, concrete resistance and consistency) both at the factory and on the building site (static and dynamic load testing, integrity trials...l).
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Prefabricated Concrete Piles are reinforced concrete pipes for special foundations of Bridges. The friction between pile and surrounding land is assured by the lateral high pressure injections of cement (without packer). Structural resistence is assured by a tickness of 10-15 cm of high quality reinforced concrete.
The installation is like Drilled Piles. Then in few minutes a simple crane can put the pile in the hole, and a workman completing all the injections.
The most important advantages are :
- veolcity of the work
- reduced cost
- high load capacity
- best protections about pitting
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They are driven piles in which the pile is formed by prefab elements, with a square or round section. They can be jointed or made of a single element. Piles with a square section ranging from 400 to 600 mm work at 150 and 200 tons, respectively. A good sections' alignment is required in order to avoid cutting stresses during re-driving operations.
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Concrete piles can bear greater loads than wooden piles. The prefab concrete pile is a traditional type of pile: ground penetrating and suitable for both small and large structures. Price-wise prefab concrete piles are an attractive option and because of the pre-tensioned reinforcement they can be supplied in various diameters.
The length of a prefab concrete pile runs to a maximum of 38 metres (longer is not practicable due to transport considerations and their susceptibility to breakage). A short note: the pile is smooth therefore it cannot 'bite into' the ground. More and more often prefab concrete piles are installed using hydraulic pile drivers.
Ballast Nedam Funderingstechnieken installed prefab concrete piles, amongst others, at the Kortsluitroute on the south side of Rotterdam. And prefab concrete piles were also used in the construction of the track for the HSL at Zwijndrecht.
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Definition:
column prefabricated, beaten in the ground using a diesel or hydraulic hammer
Characteristics:
section of 180x180mm ² until 450x450mm ²
standard length until 28m
quality of concrete >C45/55
not flexible (length not adaptable to the conditions of the ground)
considering the prefabrivation, the configuration and the loads must be known at least 4 weeks in advance
length not adaptable to the conditions of the ground: (risk of the piles too short and too long) the soil surveys must be relatively homogeneous.
possible control thanks to the test of integrity (cracking)
Scope of application:
permits to beat
complexes industrial
typically Dutch characteristics of ground: a very loose layer of dixaine of meters (<0.3MPa) and àprès a compact layer of sand. With piles préfab certainty to aivoir continuous concrete until the ground level.
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The pressure driven mini piles mean it is much easier, practical and faster to increase the load bearing capacity of industrial floors or existing foundations for the installation of heavy or precision machinery, the construction of indoor metallic infrastructures, the installation of automated warehouses, overhead travelling cranes and mezzanines.
Generally, in all these cases, suitable foundations have to be installed (consisting in adequately sized plinths).
To do this, it is necessary to break up the existing floor, remove earth, install reinforcements and cast concrete.
These are invasive procedures and are not always easy to carry out within an existing structure. By simply installing pressure driven mini piles, Novatek is able to increase the load bearing capacity of a normal industrial floor so that it is able to support the new required loads. Machinery weighing hundreds of tonnes no longer requires a huge base which takes a long time to create and is highly invasive. All you need to do is install a series of mini piles whose layout and capacity is designed and calculated according to your specific requirements. The absolute reliability and safety of the process is guaranteed by the fact that the effective load bearing capacity of the mini piles is individually tested and certified.
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Prefabricated Concrete Micropiles are reinforced centrifugated concrete pipes for special foundations. The friction between pile and surrounding land is assured by the lateral high pressure injections of cement (without packer).
The installation is like normal micropiles. In few minutes a simple machine can put the pile in the hole, and a workman completing all the injections.
Usual diameter : 210 mm
The most important advantages are :
- velocity of the work
- reduced cost
- high load capacity
- best protections about pitting
|
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|
|
|
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Typical reinforcement is 8 pre-tensioned steel strands of 0.5” section as longitudinal reinforcement and transverse reinforcement made up of rings of 6 to 10 cm. diameter at the ends of the pile.
Pre-tensioned, pre-fabricated piles are especially suitable for installation in very soft soils where significant tensile stress may be exerted during pile driving.
Applications:
Structures (bridges and viaducts)
Multi-storey buildings or edifices in seismic areas where foundations are subjected to significant buckling stress.
Structures and buildings where the lowest elevation is below the water table, so that the piles are subjected to tensile stress due to under-pressure.
Retention of earthwork embankments, basements, etc., (pile wall).
Industrial buildings with significant horizontal or buckling stress.
As for Prefabricated Reinforced Piles, the quality of these Pre-tensioned Pre-fabricated piles is monitored both at the factory and on the building site (PDA, static and dynamic load testing, vibration control).
|
|
TERRA pre-fabricated piles are capable of handling vertical compression stresses of around 12.5 N/mm2 (NTE, CPP-78) or 0.3 * fck (Technical Building Code, Basic Document SE-C, 2006), as they are Category 1 piles that are prefabricated under strict control in permanent installations.
In all cases they are made of concrete with minimum resistance properties of 45 N/mm2.
Likewise, I 52,5 N/SR (RC-03) cement is always used, which makes the piles resistant to sulphates and seawater.
Both the manufacture and on-site driving of our piles are separately guaranteed by AENOR Quality Assurance certification (UNE-EN ISO standards 9001:2000 and UNE-EN ISO standard 9002:1994).
TERRA prefabricated piles are systematically monitored during their manufacture (raw material reception, resistance and geometry, manufacture, concrete resistance and consistency) both at the factory and on the building site (static and dynamic load testing, integrity trials...l).
|
|
Prefabricated Concrete Piles are reinforced concrete pipes for special foundations of Bridges. The friction between pile and surrounding land is assured by the lateral high pressure injections of cement (without packer). Structural resistence is assured by a tickness of 10-15 cm of high quality reinforced concrete.
The installation is like Drilled Piles. Then in few minutes a simple crane can put the pile in the hole, and a workman completing all the injections.
The most important advantages are :
- veolcity of the work
- reduced cost
- high load capacity
- best protections about pitting
|
|
|
They are driven piles in which the pile is formed by prefab elements, with a square or round section. They can be jointed or made of a single element. Piles with a square section ranging from 400 to 600 mm work at 150 and 200 tons, respectively. A good sections' alignment is required in order to avoid cutting stresses during re-driving operations.
|
|
Concrete piles can bear greater loads than wooden piles. The prefab concrete pile is a traditional type of pile: ground penetrating and suitable for both small and large structures. Price-wise prefab concrete piles are an attractive option and because of the pre-tensioned reinforcement they can be supplied in various diameters.
The length of a prefab concrete pile runs to a maximum of 38 metres (longer is not practicable due to transport considerations and their susceptibility to breakage). A short note: the pile is smooth therefore it cannot 'bite into' the ground. More and more often prefab concrete piles are installed using hydraulic pile drivers.
Ballast Nedam Funderingstechnieken installed prefab concrete piles, amongst others, at the Kortsluitroute on the south side of Rotterdam. And prefab concrete piles were also used in the construction of the track for the HSL at Zwijndrecht.
|
|
Definition:
column prefabricated, beaten in the ground using a diesel or hydraulic hammer
Characteristics:
section of 180x180mm ² until 450x450mm ²
standard length until 28m
quality of concrete >C45/55
not flexible (length not adaptable to the conditions of the ground)
considering the prefabrivation, the configuration and the loads must be known at least 4 weeks in advance
length not adaptable to the conditions of the ground: (risk of the piles too short and too long) the soil surveys must be relatively homogeneous.
possible control thanks to the test of integrity (cracking)
Scope of application:
permits to beat
complexes industrial
typically Dutch characteristics of ground: a very loose layer of dixaine of meters (<0.3MPa) and àprès a compact layer of sand. With piles préfab certainty to aivoir continuous concrete until the ground level.
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