King Post Piling

King Post Piling

King post piling consists of installing steel H-sections into bored or driven piles, combined with lagging panels to retain soil between posts.

King Post Piling is a strong and efficient retaining wall system commonly used in construction projects that require excavation support and ground retention. This method combines steel H-section king posts with precast concrete panels, timber lagging, or reinforced concrete infill panels to create a durable retaining structure capable of supporting surrounding ground during excavation works.

King Post Piling is widely used for basement construction, deep excavations, retaining walls, and temporary or permanent ground support systems. It is particularly suitable for projects located in restricted urban environments where space is limited and minimal ground movement is essential.

At NPG National Piling & Groundworks Ltd, we provide professional King Post Piling solutions for residential, commercial, and industrial developments across London and throughout the UK. Our experienced team delivers safe, reliable, and cost-effective retaining systems tailored to the specific ground conditions and structural requirements of each project.

Using modern equipment and proven installation methods, we ensure all King Post Piling works are completed efficiently, safely, and to the highest industry standards.

Typical Applications

Temporary excavation support
Basement construction
Rail and highway works
Restricted urban sites

Advantages

Economical temporary retaining system
Flexible installation methods
Suitable for staged excavation

Limitations

Groundwater control may be required
Not fully watertight
Requires staged excavation

Typical Execution Sequence

Set out pile positions
Bore or drive pile locations
Install steel H-sections
Concrete or grout around posts
Excavate in stages
Install lagging between posts progressively
Install props or anchors if required

Quality Control

Position and alignment checks
Steel section inspection
Concrete/grout quality testing

Subject To

Temporary works design
Excavation sequencing
Groundwater management