: Continuous monitoring of pile heave is essential. The jacking of adjacent piles can cause an already installed pile to lift, potentially separating the pile base and leading to a loss in end-bearing capacity.
: Jack-in machines are heavy and require a stable, reinforced working platform to prevent the rig from tilting or sinking during operation.
Jacked piling, also known as hydraulic jacking, involves pushing precast or spun piles into the ground using static hydraulic force rather than dynamic impact. This method is particularly suitable for Singapore’s urban environment, where noise and vibration from traditional driven piles could damage adjacent structures.
: A common practice is to hold the maximum jacking pressure for approximately 30 seconds for at least two cycles to ensure stability.
: The Kentledge method is frequently used in Singapore to determine geotechnical design values and settlement responses.
: In thick layers of soft ground, displacement piles can cause significant ground movement. Designers must evaluate the need for pre-boring or relief holes to mitigate heave and lateral soil displacement.
: Specialist builders (e.g., G2 and G3 categories) must maintain rigs with minimum counterweights of 200 to 400 tonnes .
: Allowable pile top settlements are typically limited to 15mm at 1.5 times WL and 25mm at 2.0 times WL .
Current market capabilities in Singapore include machines with jacking capacities up to , though it is recommended to operate these machines at approximately 75% of their maximum capacity for optimal safety and performance. GeoSS Good Practice Guidelines
: Continuous monitoring of pile heave is essential. The jacking of adjacent piles can cause an already installed pile to lift, potentially separating the pile base and leading to a loss in end-bearing capacity.
: Jack-in machines are heavy and require a stable, reinforced working platform to prevent the rig from tilting or sinking during operation.
Jacked piling, also known as hydraulic jacking, involves pushing precast or spun piles into the ground using static hydraulic force rather than dynamic impact. This method is particularly suitable for Singapore’s urban environment, where noise and vibration from traditional driven piles could damage adjacent structures. : Continuous monitoring of pile heave is essential
: A common practice is to hold the maximum jacking pressure for approximately 30 seconds for at least two cycles to ensure stability.
: The Kentledge method is frequently used in Singapore to determine geotechnical design values and settlement responses. Jacked piling, also known as hydraulic jacking, involves
: In thick layers of soft ground, displacement piles can cause significant ground movement. Designers must evaluate the need for pre-boring or relief holes to mitigate heave and lateral soil displacement.
: Specialist builders (e.g., G2 and G3 categories) must maintain rigs with minimum counterweights of 200 to 400 tonnes . : The Kentledge method is frequently used in
: Allowable pile top settlements are typically limited to 15mm at 1.5 times WL and 25mm at 2.0 times WL .
Current market capabilities in Singapore include machines with jacking capacities up to , though it is recommended to operate these machines at approximately 75% of their maximum capacity for optimal safety and performance. GeoSS Good Practice Guidelines