Our Services
Information
Call Us
- info@akashganagainfra.in
- 1/51, Punjabi Bagh (West), New Delhi - 110026
These methods are designed to prevent soil movement and ensure the safety and integrity of surrounding structures. Utilizing cutting-edge techniques and equipment, we deliver reliable and efficient earth retention systems, addressing the unique challenges of each site with precision and care. Trust Akash Ganga for comprehensive and innovative earth retention solutions.
Soldier piles and lagging walls are among the oldest retaining wall systems used in deep excavations, dating back to the late 18th century in cities like New York, Berlin, and London. This method, also known as the “Berlin Wall” when using steel piles and timber lagging, can alternatively employ caissons, circular pipes, or concrete piles, though at a higher cost. While timber lagging is commonly used, reinforced concrete panels can be utilized for permanent conditions, providing durable and effective earth retention solutions. Soldier pile walls are formed by:
Â
In soldier pile and lagging walls, moment resistance is provided solely by the soldier piles, while passive soil resistance is achieved by embedding them below the excavation grade. Lagging bridges retain soil across piles, transferring lateral loads to the soldier pile system. These walls are the most cost-effective and easy-to-construct retaining systems. Their major advantages include affordability, simplicity, and rapid construction, making them an ideal choice for many projects.
Secant pile walls are created by constructing intersecting reinforced concrete piles. They are reinforced with either steel rebar or steel beams and are built by drilling under mud. Primary secant piles are installed first, followed by secondary reinforced secant piles after the primary piles have gained sufficient strength. The typical pile overlap is about 3 inches (8 cm). Unlike secant pile walls, tangent pile walls have no overlap, as the piles are constructed flush to each other. The main advantages of secant pile walls include:
Very often unreinforced secant piles are constructed with weaker concrete to allow for easier drilling of the reinforced secant piles. Other times, two or three unreinforced secant piles are utilized to achieve greater economy. In all cases though, a secant pile wall designer needs to consider compression arching stresses in the concrete as well as shear at the intersections. For deeper secant piles, installation tolerances might have to be also taken into consideration.
In circular secant pile shafts, it might be possible to only have unreinforced piles if a compression ring action is ensured throughout the secant pile wall perimeter.
Diaphragm walls are constructed using a narrow trench supported by an engineered fluid, such as bentonite mud, until replaced by permanent material. Typically made from reinforced concrete, these walls range in thickness from 500 mm to 1000 mm and can reach depths of over 50 meters. Diaphragm walls are ideal for congested areas or very deep excavations, reducing the need for extensive soil removal and providing stable support for vertical excavations. They offer a robust solution in challenging construction environments.
Diaphragm walls are ideal for deep basements, underground rail stations, tunnel approaches, and pumping stations. They can be installed close to existing structures and in areas with restricted headroom, often used in “top-down” construction. Excavation is typically performed using cable or hydraulic grabs, with hydraulic cutters or hydro mills used for hard rock penetration. These walls offer stability and support in challenging construction environments, accommodating significant depth and minimizing soil removal.
At Akash Ganga Infraventures, we have expertise in offering this technique, having constructed diaphragm walls for several projects, We have a large range of specialist equipment for diaphragm wall construction.
Call Us