In the heart of Indonesia, researchers are digging deep into the science of excavation, with findings that could revolutionize construction practices in the energy sector. Rina Yuliet, a dedicated civil engineer from Universitas Andalas, has been leading a groundbreaking study that delves into the intricacies of excavating in stiff clay soils. Her work, published in the esteemed journal, Teras Jurnal: Jurnal Teknik Sipil, which translates to “Teras Journal: Civil Engineering Journal,” is set to redefine how we approach deep excavations, particularly in the energy industry.
Stiff clay soils, known for their high cohesion, have long posed challenges in excavation projects. Despite their strength, these soils can shift or collapse if not properly supported. This is where Yuliet’s research comes into play. She explains, “The shear forces acting on the sides of an excavation can cause the soil to move or even collapse. This is a significant risk in deep excavations, especially in the energy sector where precision and safety are paramount.”
Yuliet’s study focuses on designing a safe and effective sheet pile excavation system. She aimed to determine the optimal depth of sheet pile penetration, the specifications of the sheet piles, and the capacity of the supporting struts for a 10-meter deep and 6.9-meter wide excavation. The results were striking. The actual penetration depth of the sheet piles was found to be 10.2 meters, with a total length of 20.2 meters. The bending moment, a critical factor in the design of sheet piles, was calculated both analytically and numerically, yielding values of 78.3 kN.m/m and 62.10 kN/m/m, respectively. These findings led to the specification of a U-profile sheet pile with a type II cross-section.
But the innovations don’t stop at the sheet piles. Yuliet also analyzed the capacity of the struts, the horizontal supports that prevent the sheet piles from moving inward. The allowable axial compressive strength of the struts was found to be 2,500.9 kN, far exceeding the design load of 518.9 kN. This means the struts can comfortably withstand the loads transferred from the sheet piles, ensuring the stability of the excavation.
The implications of this research are vast, particularly for the energy sector. Deep excavations are a common requirement in energy projects, from laying pipelines to constructing power plants. The failure of an excavation system can lead to significant financial losses and, worse, casualties. Yuliet’s work provides a robust framework for designing safe and effective excavation systems, mitigating these risks.
Moreover, this research could pave the way for future developments in excavation technology. As Yuliet puts it, “Understanding the behavior of stiff clay soils under excavation is crucial. Our findings can be used to develop more advanced excavation systems, reducing costs and increasing safety.”
In an industry where every meter counts, Yuliet’s work is a beacon of progress. It’s a testament to the power of scientific research in driving innovation and shaping the future of construction. As the energy sector continues to evolve, so too will the methods we use to build its foundations. And thanks to researchers like Yuliet, we’re one step closer to a safer, more efficient future.