Recent research led by Zhe Qin from the College of Civil Engineering and Architecture at Shandong University of Science and Technology has unveiled critical insights into the behavior of yellow sandstone subjected to dry–wet cycles. This study, published in the journal ‘Deep Underground Science and Engineering,’ addresses a pressing concern in construction and geotechnical engineering: the mechanical properties of rocks can weaken significantly under environmental fluctuations, potentially jeopardizing the integrity of underground structures and reservoir slopes.
The research team employed advanced techniques, including computed tomography scanning and uniaxial compression tests, to observe the effects of repeated dry–wet cycles on yellow sandstone. Their findings revealed that as the cycles progressed, the radius and number of pore throats in the sandstone increased, enhancing pore structure connectivity. This change is crucial for engineers, as it indicates how the rock’s internal structure can evolve under environmental stressors.
Qin emphasized the practical implications of their findings, stating, “Understanding the meso-damage mechanisms in rock materials allows us to better predict and mitigate risks associated with underground construction projects.” This is particularly relevant for the construction sector, where the safety and longevity of structures like caverns and slopes are paramount.
The study also introduced a meso-damage-based constitutive model, which offers a sophisticated approach to predicting rock behavior under load and environmental changes. By utilizing the discrete element method with Particle Flow Code in 2 Dimensions (PFC2D), the researchers were able to simulate the damage mechanisms at a granular level, providing a more nuanced understanding of rock deformation. This model not only enhances the predictive capabilities for engineers but also aids in the design of more resilient structures.
As the construction industry increasingly contends with climate variability, this research could be a game changer. The ability to anticipate the deterioration of rock materials under fluctuating moisture conditions can lead to safer and more cost-effective designs, ultimately reducing the risk of structural failures.
Zhe Qin’s work is a significant contribution to rock mechanics, highlighting the need for a deeper understanding of material behavior in real-world conditions. As the industry moves forward, integrating such advanced models into engineering practices could reshape how projects are approached, ensuring that safety and sustainability remain at the forefront.
For further information on this groundbreaking research, you can visit Shandong University of Science and Technology.
