Contiguous piling is an extremely successful approach to creating a retaining wall before excavations start.
Temporary or long-lasting and readily covered
Walls that are piled can use spaced and reinforced concrete piles to be created by continuous flight auger systems. Brick or masonry can be used excavation has taken place to finish the finished construction and once the piles have healed.
Usually this technique is appropriate where soil water levels are below the ultimate depth of excavation and to keep subsoils that are cohesive and stiff.
Pile diameters range between 900mm and 450mm and are typically installed at pile hearts of between 500 and 1000mm respectively thus leaving gaps between the piles between 100 and 15 mm.
Perfect for water bearing strata and free geology
Contiguous piles are an economical and practical alternative when coping with issues including ground water or strata that are really loose; they were one of the engineering options applied in New Orleans.
Such a building is in many ways much like the contiguous bored pile system, except the opening between the primary piles is full of a secondary ‘soft pile’ consisting an unreinforced poor concrete mix built to a depth below the depth of excavation that is closing. This type of construction ensures that water entrance into the following excavation is significantly reduced.
The process for building secant piles save the secondary pile isn’t soft but built of concrete similar to the primary pile, is much like interlocking piles and strengthened in a similar way to the primary pile.
A secant pile wall when finished is an affordable option to diaphragm wall building.
This wall system is frequently used in uses that were long-term. Structural piles are installed with a 100mm difference between piles usually at spacing’s. The land is so exposed during excavation but will frequently self support briefly due to “arching”. This approach is appropriate in various grounds where groundwater lies below the maximum excavation depth.
Contiguous piling vs Tired Piles
Tired piles are replacement piles which are hefty base used to support hefty and tall structural buildings and bridges. Drilled piling includes using a hydraulically or mechanically worked boring rig to drill a hole into the earth.
The hole is subsequently full of concrete and reinforced with re-bars steel cages or to form a pile, and the casing is removed afterwards. The load of the construction is carried to the earth via these tired piles. Determined by the level of concrete used and the pile diameter, tired piles can take loads
Compared to driven piling where the pile is driven into the earth using a piledriver, tired piling creates less noise and is appropriate for building near built up residential and commercial places.