Impact Analysis of Cluster Floating Debris on Bridge Anti-collision Facilities and Mitigation Strategies
FENG Yutao
WANG Weiqiao
Deng Hao
Hou Yunfei
Liao Jingyue
Abstract：With the operation of the Three Gorges Reservoir,anti-collision facilities have been widely implementedin bridge engineering across the reservoir area,However,adversely affected by clustered floating debris impacts with the secondary disasters caused by strong earthquakes are often an primary source of floating debris.Based on the analysis of material composition of floating debris in the reservoir area,this study reveals the formation mechanism of reservoir floating objects.Influenced by river currents and navigation-induced wind and waves,floating debris tends to accumulate at anti-collision facilities,which can have detrimental effects on their performance.The mechanical effects of clustered floating debris on anti-collision guide-wells and bumpers were analyzed using the finite element method.The results indicate that under the pushing loads generated by small and medium-sized clusters of floating objects,the guidewells?and bumpers experience only minor localized deformations.However,significant localized pressure is observed on the buoys and limiters,posing a risk of deformation failure that aligns with the damage characteristics observed in situ.Considering the characteristics of bridge anti-collision facilities,this study innovated methods for internal cutting and trawl cleaning of clustered floating debris in anti-collision belts,and proposed improvement measures including establishing additional or new floating debris sluice gates and optimization of curved trash racks.
Keywords：Clustered floating debrisformation mechanismanti-collision facilitiesimpact analysisMitigation strategies
Publication Date：2025-03-31
Online Publishing Date：2025-10-10(First online date of this platform, not the publication date of the document)
Pages：9( 35-43 )