Drilled piles and pile walls

Drilled pile

Drilled piles and pile walls

Along with drilled piles Styrud Boreal Ltd. offers other services related to pile walls, such as anchoring and injections.

A drilled pile is a reliable element for the groundwork on difficult ground and with environment factors that require a rock contact. A drilled pile applies especially at sites when:

– there are gradient rock surfaces

– there is a requirement for a certain puncturing level for the pile

– there are massive loads burdening a pile

– surrounding buildings and constructions are tremor-sensitive

– a construction site has layers that are difficult to penetrate

– there is a short length between piles and therefore a difficulty to reach a needed carrying capacity

– groundwork solution for cramped lots is needed

Our equipment can drill piles with a diameter of 114,3 – 813,0 mm.


Contact information

Mikko Silvast
+358 40 6815 115


Examples of drilled piles and pile walls regarded services

Drilled piles

Drilled piles are used if a large carrying capacity is set on individual construction points or if all drilled piles must meet with strict control and documenting requirements. Piles can be filled with concrete or reinforced with iron but standard pipes can also be used. RD-pile is most often used as a drilled pile because of it's capacity for holding massive loads.

We can even drill piles with a diameter of 813 mm.

A high voltage cable is always installed into a shielding pipe. The pipe can be manufactured out of steel or plastic, depending on the used method of drilling. A used drilling device on the other hand will be chosen depending on the type of the soil.

RD-pile wall and drilled pile as a structure of supporting wall

These methods can be used for difficult ground factors.

Ruukki RD®-pile walls installed by drilling usually base on and form of RD-piles. They are installed into a rock and joint together with RM/RF- or E21-locks. RD-pile wall is at it's best in supporting wall structures which in addition to vertical load are burdened with horizontal load.

If the traditional ramming is not possible due to stones in the ground or a sensitive environment, drilled piles are a better choice to use for structures of support walls. In this method steel pipes are drilled and laid close to one another and the space in between will be sealed with steel plates, concrete or framing for example.

Core steel piles

This method can be used if for example a pile must be anchored into a rock and the vertical load on the piles is minimal. This most often occurs in the groundwork of buildings.

First, a steel pipe is drilled through the ground layers and drilling is continued into a rock. A steel pole is inserted in the middle of the pipe which after the pipe is filled with concrete.


Pull and support cables are used in traction receiving, when for example anchoring; mechanical lock tongue and groove systems, ground fasteners, pier structures or towers. A drilling method is chosen depending on the type of the soil and requirements set for the needed straightness of the pipe.

First, a steel pipe is drilled to the rock through the ground layers. The hole is filled with cement and a needed amount of cables is being left. Together this forms a support wiring or a GWS-support. Tensing method is used to check the endurance of the support.