End.

: Encountering an obstruction (boulder, old foundation) or bearing stratum much shallower than anticipated.

: It is recommended that the jacking machine be used at approximately 75% of its maximum capacity . In Singapore, machines with capacities up to 800 tonnes are available.

The QP has duties under the Building Control Act, among others, to take all reasonable steps and exercise due diligence to ensure that the foundation works comply with the Building Control Regulations. For buildings of 30 or more storeys where jacked‑in piles or driven piles are adopted, the QP must determine the site investigation including the extent (quantity, layout, and depth), analyse the site investigation results, and determine the geotechnical parameters for design.

Drilling a pilot hole of a smaller diameter than the pile helps relieve lateral pressure and guides the pile straight through stiff upper crusts.

In Singapore, jacked piles are particularly advantageous in with nearby structures and sensitive residents. The jacked piling system uses dead weights to exert hydraulic pressure to push piles into the ground, producing less noise and vibration compared to driven piles, making it suitable for projects in urban areas where residents are sensitive to noise and vibrations.