CHUM 3D Tomography: Breaking New Ground in Imaging Technology

In the world of modern construction and geotechnical engineering, accurate subsurface imaging is not just a luxury—it’s a necessity. Deep foundations, such as piles and caissons, form the backbone of critical infrastructure. Ensuring their integrity is vital for the safety and longevity of the structures they support. For decades, engineers have relied on conventional methods of pile 3D Tomography to detect internal flaws and evaluate construction quality. However, as demands for precision, efficiency, and transparency grow, so does the need for more advanced solutions. Enter CHUM 3D 3D Tomography—a breakthrough in imaging technology that offers a new dimension in non-destructive testing. View this technology in this short video 

At the forefront of this technological advancement is Piletest, a world-leading developer of inspection systems for deep foundations. With a range of robust, field-proven solutions, Piletest is pushing the boundaries of what’s possible in subsurface imaging. Discover more about their innovations here: https://www.piletest.com/products 

What Is CHUM 3D Tomography? 

CHUM 3D Tomography is an advanced form of pile integrity testing that creates three-dimensional visualisations of the interior condition of deep foundation elements. This technique builds upon the established principles of Crosshole Sonic Logging (CSL), transforming raw acoustic data into detailed tomographic images. By deploying transmitters and receivers in access tubes embedded within the pile, CHUM 3D Tomography captures comprehensive data from multiple angles. 

Traditional CSL provides a basic profile of wave velocity between two points, helping detect

CHUM basic display of FAT and Energy

anomalies like inclusions or voids. CHUM 3D Tomography takes this further by using overlapping measurements from various tube combinations to reconstruct a high-resolution cross-section. This results in a clear and detailed 3D image of the pile’s defects, providing engineers with the clarity needed for informed decision-making. 

Explore this technology in greater detail here: https://www.piletest.com/CHUM-3D Tomography 

The Technology Behind CHUM 3D Tomography 

CHUM 3D Tomography relies on CHUM CSL system —specialised equipment designed to perform CSL tests with enhanced imaging capabilities. The process begins with the transmission of ultrasonic pulses through the concrete, with sensors recording the time it takes for the signal to travel between tubes. By collecting this data from various geometrical configurations, the system accumulates an extensive dataset that can be used for tomographic reconstruction. 

Piletest’s CHUM system is engineered to simplify this complex process. It starts by designing each sensor as both a transmitter and a receiver (Transceiver). Its advanced software automatically interprets the readings, generating 2D and 3D visuals with minimal manual input. These visuals help identify the volume and shape of problem areas such as poorly compacted zones, segregation, honeycombing, and water intrusions. The integration of GPS tagging and real-time data acquisition ensures that the testing process is not only precise but also efficient and user-friendly. 

Key Benefits of CHUM 3D Tomography 

CHUM 3D Tomography delivers several significant advantages that set it apart from conventional testing techniques: 

• High-resolution 3D imaging: Provides engineers with detailed cross-sectional and longitudinal views. Can give an estimation of the volume and shape of the defects in the pile  

• Greater defect detection: Identifies subtle anomalies often missed by basic CSL or low-strain tests. 

• Rapid analysis: Field teams can quickly interpret results and take corrective actions. 

• Non-invasive: Causes no damage to the structure and requires no post-construction intervention. 

• Versatile: Suitable for new construction quality control as well as forensic investigations in existing structures. 

For project managers, inspectors, and consultants, these benefits translate into fewer delays, reduced risk, and greater confidence in structural assessments. 

Industry Applications and Use Cases 

The flexibility and accuracy of CHUM 3D Tomography make it invaluable across a wide spectrum of construction projects. In urban developments where deep foundations are common, such as high-rise buildings, metros, and commercial complexes, the ability to verify pile integrity with certainty is a critical requirement. 

CHUM 3D Tomography is also highly applicable in infrastructure megaprojects, including bridges, flyovers, marine ports, and wind turbine foundations. For instance, a transportation authority tasked with building a coastal bridge may use CHUM 3D Tomography to verify that all support piles are free of structural defects before proceeding with superstructure installation. In another case, engineers retrofitting an aging foundation can use CHUM data to identify weak zones and determine if reinforcement is necessary.

How CHUM 3D Tomography Compares to Other Methods 

While standard CSL and gamma logging remain useful for certain applications, they offer limited

resolution and are largely dependent on interpreting velocity charts. Low-strain integrity testing, though convenient, cannot provide detailed internal visuals. CHUM 3D Tomography fills this gap by delivering accurate, image-based insights. 

When compared side-by-side: 

• CSL shows velocity loss over distance and give a One Dimension view of the flaw or defect. CHUM 3D Tomography shows exact location and size and volume of defects in 3D. 

• Gamma logging detects density changes but lacks clarity on defect geometry. 

• Low-strain tests indicate general pile health but do not pinpoint internal flaws. 

With a 3D Tomography CSL tester from Piletest, engineers gain the advantage of visualising anomalies in 3D, allowing for precise documentation, reporting, and verification. 

Why Choose Piletest? 

Piletest has built a strong reputation in the field of pile testing through decades of innovation and excellence. Their suite of solutions, including the CHUM platform, is trusted by engineers, consultants, and contractors across the globe. With unmatched reliability, intuitive interfaces, and ongoing support, Piletest makes it easy for professionals to adopt and benefit from CHUM 3D Tomography. 

In addition to CHUM 3D Tomography, Piletest offers equipment for low-strain integrity testing, parallel seismic testing, PDA system and borehole inclination inspection. Each tool is developed with field conditions in mind, ensuring durability, accuracy, and ease of use. 

Explore the full ecosystem here: https://www.piletest.com/ 

Getting Started with CHUM 3D Tomography 

Adopting CHUM 3D Tomography is straightforward with Piletest’s comprehensive onboarding and support. Whether you need a demonstration, customised training, or on-site consultation, their expert team is ready to assist. Engineers can begin by acquiring the CHUM system, installing the software, and using the step-by-step guides to start testing immediately. At first Piletest will offer you 3D Tomography for free for intial cases, and then will allow you to purchase a full lincense. The basic 3D Tomography viewer software is standard with every CHUM. 

Piletest also offers certifications and complies with international standards such as ASTM D6760, ensuring your testing is recognised and validated globally. With local representatives in many regions, you’ll never be far from support.

Conclusion 

As construction projects become more ambitious, the need for accurate and reliable integrity testing continues to grow. CHUM 3D Tomography is setting a new standard in subsurface imaging, offering unparalleled insight into the internal structure of piles and caissons. By embracing this technology, engineers can ensure better safety, improve quality control, and make smarter decisions at every stage of construction.