1. Cast in-situ Bored Pile of Large diameters by track mounted rotary rigs. Bored cast-in-situ concrete piles are constructed by auguring, drilling, placing reinforcement and then pouring concrete into the hole. These are structural piles which are constructed for the purpose of carrying the load of buildings.
2. Bored Pile construction for retaining walls
- Contiguous Bored Pile
Contiguous Bored Piles are closely spaced bored piles that are used to build a retaining wall, when we construct a deep basement or a tunnel. Usually the contiguous bored piles are constructed adjacent & touching each other piles.
- Secant Pile wall Construction
These are constructed with intersections in one pile on another(Primary & Secondary) and using alternative piles along the line of the wall leaving a clear space in between for embankment stabilization.
3. Pile Toe grouting for Large Diameter Piles.
It is important to carry out toe-grouting for large diameter(1500mmand above) piles to increase the load bearing capacity significantly.
4. Installation of Plunge-in- Columns for top down construction (King Post installation)
When it comes to the top down construction where we have to construct downwards towards the basement, we need to install plunge-in columns. We at D.P Jayasinghe Pillars complete the task easily with the man force and the technology we have.
5. Shoring/Excavation for pile hacking and pile head preparation
Shoring has to be done where excavation is more than 1.5m or if the soil is loose and collapsing. Hacking shall be conducted in a fast and latest method to hand over to the clent.
Ground Preparation by controlled rock Blasting
Pile testing work
We conduct pile testing work adopting the latest equipment and technology to analyse the results. Additionally, pile testing is essential to be operated specifying an intrinsic test factor and a test benefit factor
- Static Load Testing(Maintained Load Test)
The Static Load Test is conducted on the pile in discrete increments and checking the resulting pile movement. This method is normally considered as one the most suitable and reliable, methods though its time consuming in the process of determining the carrying capacity of a certain pile.
- Dynamic Pile Testing(PDA Test)
This test is most commonly used for pile testing to predict the static soil resistance and the settlement behaviour. It is widely believed that the further developed analytical models of the pile interaction can provide prediction of the load/ settlement performance of the tested pile.
- Pile Integrity Testing
When a pile or a shaft is cracked, damaged, necked, bulged or contains voids, The Pile Integrity Testing is carried out to check it for further testings or repairing.
- Cross hole sonic logging test(CSL)
Through the CSL Test, the soundness of the pile is tested within the drilled shaft. Usually before the rebar cage is placed in the hole, it is the CSL access tubes that are attached to the interior of the rebar cage, which is later, used for CSL testing.
Reports shall be presented with review & recommendations from experts.
Noise and vibrations are generated when the casing is driven in and extracted from the ground by the vibro-hammer. Noise is also generated during the augering process. We will therefore try our best to schedule the work such that it creates minimal disruption to the public.
Position of Bored Pile
Installation of Casing
Augering of Borehole
Augering of Borehole
The auger, a drilling tool, cuts and removes the soil within the casing to form a borehole. The soil surrounding the borehole is supported by the casing. If the casing is not long enough to reach the required depth in the ground, bentonite slurry is used to support the soil below the casing.
Concreting of Borehole
Repetition of Process
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