Design, construction and monitoring phases of a diaphragm wall shoring application near the Golden Horn

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Publication Title
Design, construction and monitoring phases of a diaphragm wall shoring application near the Golden Horn

Abstract
One of the landmark buildings of Istanbul on the shores of the Golden Horn was damaged due to the large settlements occurred in the years after its construction. A comprehensive soil investigation study was held to determine the problem. The investigations revealed loose soil layers prone to settlement and also have liquefaction risk under earthquake loads. Remediation options were evaluated in the beginning of the construction. Demolishing of the existing structure and reconstruction of the new one with basement floors were recommended by the Consultant. A 9.5m excavation was planned for basement construction. It was decided to apply diaphragm wall supported with one row of strut and jet grouting on the toe. Due to the large excavation sizes and required long steel struts, king post barrettes were decided to be applied. Jet grout columns were applied with high efficiency monitor systems to obtain an improved layer and a thick bottom plug. Groundwater seepage was successfully minimized. Monitored displacements due to excavation were below the calculated ones. The project which was located in a very congested area with challenging soil conditions and construction difficulties was completed in a safe and timely manner.
Authors
Oender Akcakal; C. Acar; Numan Velioglu; Ogan Sevim

Published In

18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)

Theme

D - Current and new construction methods

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