Having installed millions of metres of piling we can confidently say we know our job. Pålab is one of the foremost piling experts in Scandinavia and our know-how gives us the market lead in several piling methods. Wherever you want to establish a base we can ensure that your site provides a stable, reliable and safe foundation on which to build.
Our expertise gives you more flexibility to exploit your site. We can carry out many different types of piling, which means there are fewer limits on your choice of site. Whether you require driven or drilled piling we can take care of your groundwork from start to finish. Thanks to our experience from thousands of piling contracts you get the best advice and solution based on your project requirements and geotechnical conditions.
We show our real strength when you face difficult conditions. Pålab leads the Scandinavian market in grouted piling that is well suited to difficult ground conditions. Our knowledge of geotechnical requirements and in the design and application of modern piling methods means that we can reinforce your site even when it is difficult to reach a stable base or achieve high sleeve friction. Grouted piling involves drilling in piles and injecting a cement slurry grout that mixes with and anchors the pile to the surrounding soil layer. Our grouted piling not only provides a stable foundation, it also complements conventional piling well, since it reduces the risk of settlement, noise and vibration. Because the piles are drilled and grouted at the same time this method is both cost-effective and saves time.
Concrete piles are our most common type of pile as they offer a good, but above all cost-effective solution if the geotechnical conditions are advantageous. Concrete piles come prefabricated, which means that they are cast in a factory and delivered to predetermined lengths. The casting takes place according to a square profile and is usually reinforced in each corner, but it can also be spiral-reinforced.
Pålab works with all standardized concrete piles such as SP1, SP2, and SP3, and our machine park can handle both support and cohesive piling with concrete as a base. As a complement to cohesive piling, wooden piles can also be used. Since concrete piles are prefabricated, this means that the piles cast in the factory need to be spliced and thus they can not provide the same type of tensile capacity as e.g. steel core piles. On the other hand, concrete piles are extremely reliable in their capacity in terms of compressive strength. We verify the load-bearing capacity of our concrete piles by shock wave measurement, or dynamic test load as it is also called.
Steel core piles are the type of pile that is preferred for highly concentrated loads on a small surface, such as bridge foundations. So when the load rises and the requirements for small environmental impact are extra high, we at Pålab have the knowledge and equipment to install steel core piles of all types. This solution is generally more expensive but also meets the very highest requirements.
Steel core piles are constructed in such a way that a steel pipe is drilled down to rock, where the drilling then proceeds without steel pipe to create a hole in the rock. Then the steel core is brought down into this hole, and thus becomes the dimensioning body to take the entire load. After that, the other cross section of the hole is filled with cement, to protect the steel core from corrosion, and to stabilize it later. Additional advantages of steel core piles are that they can withstand both compressive and tensile loads. We verify the load-bearing capacity of our steel core piles by shock wave measurement, or dynamic test load as it is also called.
Injection piles can be considered as a simplified variant of steel core piles, as these are drilled directly with the steel blank instead of retrofitting a steel core. Drilling takes place at the same time as a cement slurry is flushed (injected) around the drill bit and the steel blank. Injection piles are often used in friction soils, ie soils that contain a lot of sand, gravel or stone.
The advantage of injection piles is that they have a good penetration ability, they can be drilled even in the event of obstacles in the ground, and that the cement slurry that is flushed hardens in the ground and creates an irregular body along the length of the pile. This irregular body leads to injection piles thus having a very high load-bearing capacity, not only on the tip but along the entire sheath. In terms of price, it can be compared with drilled tubular steel piles, but with the difference that injection piles can be used better for both compressive and tensile loads. We verify the load-bearing capacity of our grouting piles by static test loading (usually test drawing).
Construction of steel pipe piles can be carried out in different ways. The most common, and most economical alternative, is to drive a steel pipe into the ground that is equipped with a shoe (a lid) at the bottom. This shoe is solid, and equipped with a stud that allows the shoe to meet the mountain in an advantageous way. Steel pipe piles are constructed through joints with surface-mounted joint sleeves, which means that the joints are joined together. A major advantage of steel pipe piles is that the work out in the field goes faster than with other piles, so it is possible to maintain a high production speed with many meters struck per shift.
The second variant of steel pipe piles is drilled steel pipes. These offer the same capacity in terms of pressure and tensile load as beaten steel pipe piles but are more expensive to install due to the production time. What speaks for this variant of steel pipe piles is that they do not require an equally favorable geotechnical technology to be able to be constructed. Since steel pipes cannot be knocked down if the ground contains blocks, stones or other difficult obstacles in the ground, drilled steel pipe piles can be a good alternative if these obstacles occur. We verify the load-bearing capacity of our steel pipe piles by shock wave measurement, or dynamic test load as it is also called.
Wooden piles are commonly used in the construction of temporary piles, pile bridges and also some ground reinforcements. This can be, for example, temporary working roads when building a railway or when a temporary stabilization measure is needed in swampy areas, and the reason for this is that wooden piles have a very short service life. It is usually a spruce between 15-20 meters long, which is turned upside down and beaten into the clay.
However, the service life of wooden piles can be very long if they are knocked down long enough and then extended with, for example, a concrete pile, this is because the oxygen does not reach the wood and thus the wood does not rot. In the context of cohesion piles, the wooden pile is often used in combination with the concrete pile and the load is then verified as most commonly by shock wave measurement, or dynamic test load as it is also called.