1915 Çanakkale Bridge European Anchor Block Excavation Project A Case Study

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4. 1915 Çanakkale Bridge European Anchor Block Excavation Project A Case Study

This paper presents a deep excavation of the reinforced concrete anchor block structure with a volume of 68,000 m³, located on the European side of the 1915 Çanakkale Bridge. Slope stability, excavation, and dewatering works within the scope of the European Anchor Block Project with a maximum excavation depth of 46,0 m were completed within the tight schedule in a very heterogeneous soil profile consisting of Miocene-based sandstone-mudstone layers and Holocene deposits containing gravelly sand-clay units, especially on the seaside. Within the scope of the project, 170,000 m³ of excavation work, 10,000 m of rock bolts, 12,000 m² of shotcrete applied with ±1cm construction tolerance, besides 431 nos of secant piles and 28 nos of dewatering wells were executed. In order to verify the in-situ design capacity of the rock bolts, a total of 26 nos of preliminary pull-out tests were performed, on each side of the excavation pit and each excavation stage prior to the commencement of the production rock bolts. In this study, the design of the slope stabilization project, details of the construction works, and the results of the rock bolt tests are presented. Detailed information about the quality control tests followed within the scope of the project and the performance of the slope protection system has also been presented.

28th European Young Geotechnical Engineers Conference (EYGEC2024)

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