Piles can be placed close together, with 75 to mm between piles called a contiguous pile wall , or they can be placed so they overlap, to create a secant pile wall, which is often used to control migration of groundwater.
Like any other deep foundation system, bored piles present challenges for the contractor. Because the drilling method used depends on the soil type, the contractor must complete a thorough soil investigation and report. The piling contractor relies on the soil report and past experience to choose the best drilling method that will minimize the disturbance of the surrounding soil. When the soil is cohesion-less, such as with sand, gravel, and silt, or the hole extends below the water table, the hole must be supported using steel cages or stabilizing mud, such as bentonite suspension.
This solution can be a very messy process and add considerable complexity to the project. The main advantages of bored piles or drilled shafts over conventional footings or other types of piles include:. Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content. Create a personalised content profile. Measure ad performance.
Select basic ads. Create a personalised ads profile. Soletanche Bachy presents its full range of piles: bored piles. A pile is defined as a structural element positioned in the soil to transfer loads and limit distortion. There are no limits on its slenderness ratio. Piles may be uniformly straight, threaded, flared and under-ream, or prefabricated. Piles are circular in cross-section. Square, rectangular, T-profile, L-profile or any other similar configuration are referred to as barrettes. The barrette methodology and its advantages are detailed in the description of the diaphragm wall technique.
What are the advantages of this technique? Piles can be constructed on land or from floating platforms. The ability to analyse drilling rigs as the basis for optimising design parameters and confirming soil characteristics The ability to design and manufacture special tools A modern and versatile fleet of more than LDA piling rigs, 50 crane ropes, crawler cranes and cable excavators A laboratory dedicated to the development of drilling muds and concrete formulations Dedicated construction work quality control software.
Implementation The LDA technique requires the use of powerful hydraulic piling rigs which can use interchangeable attachments such as augers, buckets or core barrels. These tools can cope with all types of granular or cohesive soils, including rock up to a compressive strength of MPa: Augers for cohesive and dry non-cohesive soils Digging buckets for granular strata A combination of rock augers and core barrels for harder strata LDA piles use a temporary steel casing to support unstable strata and ensure safe working conditions at pile boring platform level.
Bored piles generally take the form of cast-in-situ concrete reinforced with a steel rebar cage. Features Bored pile diameters commonly range from mm to 3. Depths of metres are also becoming relatively commonplace on land suitable for this type of technique.
Execution controls and monitoring. Did you know? Bored Piles are cast-in-place concrete piles, meaning the pile is cast on the construction site. Driven Pile Construction Equipment typically includes a crane, hammer, piling rig, powerpack hydraulic or air-hammer and Bored Piles typically utilise a Drill Rig, Helper Crane, Spoil Handling loader, skip pan, etc.
Bored Pile Advantages. The main advantages of bored piles include:. Driven Pile Advantages. The main advantages of driven piles include:. By louise on 10th March in Company News. What are the differences between Bored Piles and Driven Piles? Material Driven Piles are made from preformed material having a predetermined shape and size that can be physically inspected prior to and during installation, which is installed by impact hammering, vibrating or pushing into the earth.
Equipment Driven Pile Construction Equipment typically includes a crane, hammer, piling rig, powerpack hydraulic or air-hammer and Bored Piles typically utilise a Drill Rig, Helper Crane, Spoil Handling loader, skip pan, etc. Bored Pile Advantages The main advantages of bored piles include: Piles of variable lengths can be extended through soft, compressible, or swelling soils into suitable bearing material.
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