Bored piles are non-displacement circular cast in-situ reinforced concrete piles that are capable of carrying large vertical, lateral & bending loads which are used as foundations to support buildings, bridges / flyovers, MRT underground & overhead structures, etc.
Bored piles are normally installed using a rotary boring rig with a temporary steel casing to stabilize the top loose / soft soils. Depending on subsoil conditions, bored piles can be bored either in dry condition or with stabilizing fluids (polymer or bentonite).
With our wide range of heavy duty rotary boring rigs (Bauer BG28, BG36 & BG39), we are capable of installing bored piles in any type of ground conditions, such as very hard rock formations to very deep soft subsoil conditions; up to 2.5m in diameter and depth exceeding 80m.
We have carried out bored pile installation under various site contraints, such as within MRT reserves or close proximity to any sensitive structures (e.g. conservation buildings) which has low tolerance to vibration. In such cases we have employed techniques that eliminate the use of vibro hammer for casing installation or chiselling for hard rock socketing.