Lateral movement of bridge abutment is frequently causing damages to the expansion joints, bearings, bridge backwall and settlement of approach slabs. In this study, about 1,000 bridges which was lateral movement occur were investigated. The investigation shows that the lateral movement of abutment occurred not only in soft ground, but also in abutment on embankment of the normal soil conditions. The causes of lateral movement included settlement and deformation of high embankment, lateral spread of soft ground, expansion of con'c pavement by alkali-aggregate reaction.

• 이상래(한국도로공사 도로교통연구원 안전연구실 선임연구원) | Lee, Sang Rae
• 박창호(한국도로공사 도로교통연구원 구조물연구실 실장) | Park, Chang Ho
• 김경석(한국도로공사 도로교통연구원 경영전략연구실 책임연구원) | Kim, Kyung suk