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Contiguous Pile Wall



Are you looking to understand what a contiguous pile wall is and how it can be used as an effective earth retention solution? A contiguous pile wall is a retaining wall made up of concrete bored piles installed in linear configuration.

They are commonly employed in large basement construction projects for providing structural support and effective earth retention. This article will discuss the technical specifications, fields of application and environmental impact related to the use of contiguous pile walls.

Read on to learn more about this innovative construction technique that is highly versatile and efficient!

Construction and Technical Specifications of Contiguous Pile Wall

Contiguous pile walls are a type of earth-retaining structure that restricts movements of the soil on the retained side. This wall is constructed by installing unconnected concrete bored piles in a linear configuration and typically have minimum inter-pile spacing of 150mm.

The construction process itself can vary slightly depending on project requirements, however usually involves excavating from one end to another along with continuous excavation as necessary within some areas due to space constraints.

Although it differs upon locations, often soils between the piles are removed to form an open pocket which has angular or rounded profile at its face; thereby providing load bearing capacity and restraint against surcharge loads.

During construction in dry or cohesive soils, specific considerations must be taken into account such as filling empty pockets with either a particular soil or grout mix designed for shear strength and preventing stone bridging between interlock points along with efficient compaction when required prior to concreting.

These walls can also be reinforced by steel beams if necessary for extra strength before being filled with cement thus improving their stability against seismic activity.

Fields of Application and Environmental Impact of Contiguous Pile Wall

Contiguous pile walls are a popular earth retaining solution that can be used in various fields of application where excavation is required. These walls are an especially ideal solution for projects which involve tight spaces along a boundary, or need to adhere to strict environmental regulations due to their minimal disturbance capabilities.

Contiguous pile walls are commonly employed in piled retaining wall techniques, including some of the deepest piled retaining wall installations ever built.

The installation process for contiguous pile walls does not require expansive excavation and thus they have minimal impact on the surrounding environment while still providing effective land use solutions.

This tends to reduce dust emission and soil compaction from excessive construction work and also helps preserve natural ecosystems when dealing with deep structures such as dams and tunnels.

In urban areas experiencing land shortage issues these piles provide an economic option that enables construction projects without compromising existing boundaries or disrupting the lives of nearby residents.

Various applications ranging from bridges, basements, cofferdams and auxiliaries have documented successful implementations of contiguous piling systems throughout the UK – such as an Y-shaped combined bored-driven contiguous pile wall at London’s East India Dock development site – showing off their versatility even in complex situations requiring extensive engineering validation studies beforehand.

Overall this technique offers great advantages with respect to stability and waterproofing performance whilst using costeffective methods during its implementation making it one of the most preferred options for earth retention constructions worldwide.


Contiguous pile walls are an effective and efficient earth retention solution for urban projects. They allow for the utilization of available space in areas with strict zoning laws and regulations due to their linear configuration.

Contiguous bored-pile walls offer superior structural support, making it an ideal choice when creating retaining walls with high load-bearing capacity. Additionally, they provide architects and engineers design flexibility allowing them to use a variety of mechanical connections and soil stabilization techniques as required while following a specific sequence during construction.

Thus, contiguous pile wall is one of the most reliable solutions for commercial basement applications that require powerful, yet easy-to install load bearing structure in relatively confined spaces around urban areas.



Contiguous pile walls are an effective and efficient method of constructing retaining structures. They enable construction with minimal excavation, requiring only the piling that makes up the wall itself.

This produces an economical solution and enables easier maintenance when compared to other forms of retaining walls. The piles which make up a contiguous pile wall are arranged in a line with small gaps between them, typically around 150mm.

This arrangement yields lower costs than secant or piled diaphragm walls but still provides sufficient structural integrity for safe and successful remote construction projects.

Construction and Technical Specifications of Contiguous Pile Wall: Contiguous piled walls can be installed either by rotary bored or continuous flight auger (CFA) methods depending on ground conditions and requirements specified in the project scope.

The design parameters include calculations on load variation due to impacting factors such as traffic vibration, wind loads etc., along with accommodating required capacity; such designs guarantee strength and stability throughout a structure’s lifetime span.

Due to their ease of installation without any special guidance system, they are capable of dealing with varied displacements during its service life more effectively than other systems like secant pile walling systems which need guidewalls to construct them properly; this quality is also beneficial for basement construction works due to variations seen in loading scenarios encountered during execution phase thereof.

Additionally, thanks to their nature formed from unconnected non-interlocking concrete elements between piles, waterproofing needs can be addressed using membranes or stiffening sheaths within soil spaces if necessary alongside reinforcing cables provided for additional rigidity/reinforcement effects required per layout specifications as called upon in certain applications pertinent root cause analysis done beforehand taking into account poolings/residual water accumulations observed underneath after progression inspections at site locations too wherever feasible.

Fields of Application and Environmental Impact: Contiguous piling walls have been used widely across many industries including residential development projects where they offer excellent environmental benefits due to reduced amounts of material displaced from excavation activities associated thereto , agricultural developments concerned wherein function optimisation attuned environmentally friendly fulfilment sessions held onsite bear witness too herein inter alia related tropes prior precluding advent integration strata having optional pretext status going forward impeccably also touted so keenly reflected amidst naturalistic

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Contiguous pile walls are a type of bored piles wall used particularly for ground reinforcement during excavation projects and other construction work. Contiguous piles consist of a series of closely spaced wall sections installed around the perimeter in order to provide support.

Unlike secant piling, contiguous piled walls offer superior load-carrying capacity due to their increased level of structural stability. Each individual section is arranged in an overlapping fashion with 150mm gaps between them and can be filled with concrete depending on its purpose.

The strength of contiguous pile walls relies heavily on the interconnection between adjacent piles which is essential for stability when facing lateral forces or seismic loading. In addition, this method also reduces water seepage to certain levels and offers overall durability due to its extensive use by leading engineers across the world who have successfully completed complex projects using these techniques namely roadways, tunnels etc. Furthermore, other applications include creek or railway embankments as well as retaining structures requiring effective stabilisation from differential external pressure caused by soil erosion or groundwater accumulation over long periods.

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