The Evolution of Underpinning Solutions

Building a safe, stable foundation for your structures is just as important as crafting what sits above it. Foundations are the unsung heroes of construction, silently supporting homes, commercial buildings, and infrastructure for decades. But what happens when they need a helping hand? Cue underpinning, an age-old technique evolving with modern engineering. 

If you’ve been involved in construction or structural engineering, you’d have come across the term before. Underpinning serves as a method to strengthen and stabilise foundations, ensuring buildings return to their robust selves. 

Whether you’re a homeowner with a spot of foundation trouble, a property owner curious about improving structural integrity, or a business owner wanting to keep the office structure in top shape, understanding the evolution of underpinning can help you make informed decisions. 

What is Underpinning? 

Underpinning is a construction technique used to strengthen the foundation of an existing structure. If your building faces issues such as foundation settlement, or if added load from renovations stresses an older foundation, underpinning is the go-to solution. 

The process involves extending the depth or breadth of the existing foundation, typically completed in stages to maintain the overall structural integrity. Each stage or section of underpinning is referred to as a “pin,” which collectively stabilises your foundation. Think of it as adding extra supports to ensure your foundation stands tall (metaphorically) through time. 

Common techniques for underpinning include mass concrete pour, where additional concrete is poured beneath the foundation, and beam or mini-pile methods, which distribute weight more evenly. Whichever method is used, the process focuses on bolstering the building’s stability. 

A Quick Walk Through Underpinning History 

Underpinning is anything but new – in fact, it’s older than most of the structures it’s used to save. The technique has been around for centuries, predating even the Renaissance! One of the earliest documentations of such a solution comes from the Italian Renaissance architect Leon Battista Alberti, who outlined its merits in his 1452 architectural treatise De Re Aedificatoria. Since then, underpinning has played a pivotal role in preserving and reinforcing vital structures, from bridges to tunnels and skyscrapers.

Historic Example – Renaissance to Near Modern 

The use of underpinning evolved with architectural needs, showcasing its versatility along the way. For example, tunnels and bridges of medieval Europe often relied on underpinning to extend their lifespans and handle increasing demands as commerce expanded. 

Fast-forward to the 20th century – one standout uncovering story involved the Hotel Commodore in New York City (later the Grand Hyatt). Erected in 1917 just above the Grand Central Station subway, its 1979 renovation saw the need for massive underpinning efforts. This was done to expand the subway’s mezzanine while safely transferring the hotel’s weight onto temporary supports. 

This under-the-surface miracle paved the way for safer subway operations and a gleaming new hotel. While you’ll never actually see underpinning (it’s, well, underground), its critical role in architectural preservation is unmatched. 

Modern Underpinning for a Changing World 

While traditional subsidence solutions like mass pouring and beam extensions have stood the test of time, modern engineering introduces innovative, less invasive approaches. Take geopolymer-based underpinning solutions, for example, such as the method we use here at Geobear. 

Unlike traditional techniques that often require lengthy excavation, Geobear solutions are excavation-free, quick and non-disruptive. These solutions are applied via light machinery. This therefore makes them an ideal choice for stabilising commercial, industrial, residential and even historic buildings, all with minimal disturbance. 

These modern underpinnings don’t just address today’s fast-paced construction demands but are also incredibly adaptable to unique challenges like eco-friendly construction and maintaining historically significant structures.

Why Choose Geobear? 

If your existing foundation needs a boost, Geobear offers cutting-edge geopolymer solutions that redefine underpinning. Unlike traditional methods, Geobear’s approach focuses on minimal disruption and installation speed without excavation. Whether it’s a historical monument, a residential home, or a public infrastructure project, our team can help you.

Key Benefits of Choosing Geobear: 

• Fast and non-disruptive underpinning process 
• Use of sustainable and environment-friendly materials 
• Light and nimble machinery suitable for restricted spaces 
• Proven success across commercial, residential, and infrastructure projects 

Preserve your structures, maintain safety, and strengthen your foundation using modern, innovative solutions. 

The Foundation of Future Structures 

Underpinning has come a long way from being just a builder’s tool to becoming a sophisticated engineering marvel. From its roots in the Renaissance to the exploration of modern geopolymer solutions, the technique has evolved to meet the demands of changing architectural landscapes. 

Whether you’re a homeowner concerned about cracks or a commercial property owner planning an ambitious remodel, underpinning guarantees you the strength and stability your structure needs to stand the test of time. 

To explore how state-of-the-art underpinning can transform your project, contact Geobear today. We can provide both subsidence investigations and subsidence solutions to both homeowners and business owners alike, and we are always pleased to help when you need us most.