In the heart of Indonesia’s energy infrastructure, a critical component of power generation is undergoing a meticulous transformation. The stability of the Java 9 & 10 Suralaya Steam Power Plant (PLTU) in Cilegon, Banten, hinges on the innovative design of its seawater intake retaining walls. A groundbreaking study, published by Ibadurrahman Adz Dzikro from the Master’s Program in Civil Engineering at the Bandung Institute of Technology, delves into the complexities of these retaining walls, offering insights that could revolutionize future energy projects.
The seawater intake area of the PLTU is a high-stakes environment where the stability of underground structures is paramount. The retaining walls, essential for maintaining this stability, are designed with precision to withstand the unique challenges posed by the site’s depth, soil type, and groundwater levels. “The selection of the retaining wall construction is not arbitrary,” explains Dzikro. “It is a calculated decision based on the depth of excavation, soil type, the height of the Groundwater Table (GWT), and the load being retained.”
The study employs advanced methodologies, including the Rankine and Coulomb theories for lateral force calculations and the use of MIDAS GTS NX software for stability analysis. The retaining wall design is bifurcated into two main components: diaphragm walls and secant piles. The integration of lateral reinforcement, in the form of soil anchors, adheres to the stringent provisions of SNI 8460-2017, ensuring robustness and reliability.
One of the standout features of this research is the use of the Mohr-Coulomb soil model and pseudostatic earthquake analysis. These methods, while producing more conservative results, underscore the importance of preparedness in seismic-prone areas. “The design criteria we’ve set ensure that the wall and anchor configurations are not just functional but also resilient,” Dzikro notes. “This is crucial for the long-term sustainability of the PLTU.”
The implications of this research extend far beyond the confines of the Suralaya PLTU. As the energy sector continues to evolve, the need for stable and efficient seawater intake systems becomes increasingly vital. The insights gained from this study could pave the way for more innovative and reliable retaining wall designs in future power generation projects. The use of advanced software like MIDAS GTS NX and the adherence to international standards like SNI 8460-2017 set a benchmark for future developments in the field.
The study, published in the Civil Engineering Journal, highlights the importance of meticulous planning and advanced technology in the construction of critical infrastructure. As the energy sector looks towards a future of increased demand and environmental sustainability, the lessons learned from the Suralaya PLTU could be instrumental in shaping the next generation of power plants. The research by Ibadurrahman Adz Dzikro and his team at the Bandung Institute of Technology is a testament to the power of innovation in overcoming engineering challenges, ensuring that the lights stay on and the wheels of industry keep turning.