Secant piles form a part of a solid, sturdy system that amalgamates earth retention with groundwater barrier walls. An exemplary procedure for secant pile wall construction involves drilling an array of primary (drilled first) and secondary (drilled second) overlapping shafts, which collectively constitutes a cohesive secant wall. The concrete content in the shafts can be either entirely low-strength or high-strength, or a mix of both, with low-strength primary and high-strength secondary shafts. Typically, steel piles or reinforcing steel is inserted into the secondary shafts. There’s also a possibility of constructing unreinforced high-strength shafts within a self-supporting circular structure, often used in access shafts leading to tunnels.
Secant pile walls showcase comparative impermeability, making them fit for controlling groundwater inflow during excavation and minimizing drawdown on the excavation perimeter. Secant walls hold significant rigidity, proving to be ideal when sensitive structures are located behind the wall.
The utilization of secant piles for cutoff wall construction has an inherent advantage owing to Schnabel’s high-torque drill rigs. These rigs have the proficiency to penetrate tough drilling conditions while casing the drill hole concurrently. With the ability to navigate through man-made and natural barriers like cobbles, boulders, and reinforced concrete, these drills are a testament to Schnabel’s innovative approach to the complexities of construction.
Furthermore, the adaptability and resilience of secant pile walls make them a go-to solution even in challenging soil conditions. These designs, with their combination of functionality and structural integrity, stand as proof of Schnabel’s dedication to delivering top-notch, cost-effective construction solutions to their clients. The deep roots of experience that Schnabel has laid down over decades in the construction industry enables them to fully realize the potential of secant pile wall technology, thereby taking the construction project one step closer to success.