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Influence of rubber particle-EICP composite improved loess as a seismic isolation trench on the vibration response of high-voltage transmission towers
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DOI：10.3389/feart.2026.1799038.png)
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Abstract
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Introduction Research on vibration mitigation for transmission towers is critical to enhancing the seismic resilience of power grids and ensuring power supply safety.Methods This study investigates the effectiveness of a vibration isolation trench installed around a tower foundation. The trench is backfilled with a composite material consisting of rubber particles and enzyme-induced carbonate precipitation (EICP)-treated loess. The reliability of a finite element model was first validated against shaking table test results. Subsequently, parametric studies were conducted using numerical simulation to analyze the effects of key design parameters-including trench depth, width, and distance from the foundation-on the seismic response of the tower system.Results The optimized trench effectively reduces the transmission of seismic energy to the foundation-structure system, mitigates soil-structure interaction, and significantly decreases the tower's acceleration and displacement responses. The isolation performance improves with increasing trench width and depth; however, the enhancement plateaus when the depth exceeds 8 meters. Furthermore, a closer proximity to the foundation combined with a greater trench width leads to more pronounced vibration reduction.Discussion This study provides practical guidance for the seismic design of transmission towers in loess regions.
Keywords:
EICP technique
improved loess
isolation trench
rubber particles
shock reduction and isolation
transmission tower
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