抄録
Basement construction has been developed for many years by using either top-down construction method or bottom-up technique. Recent, deep basement construction in Bangkok City becomes complicated as it may trigger damage to sensitive surrounding structure. Central Embassy department store project is the luxury department store and hotel located in the Central Business District (CBD). There are 5-6 basement floors which required excavation to 24.2 meter below ground level. The excavation is closed to Bangkok Mass Transit System (BTS) sky train foundation at the front and the British Embassy at the back. Various depth and size of diaphragm wall were carefully analyzed and designed based on many obstruction. Fully instrument scheme including inclinometer, piezometer and stress transducer were installed in diaphragm wall and soil for monitoring of walls and their effect. The field measurement agrees with FEM prediction. The basement construction was completed without any effect to BTS sky train foundation and British Embassy.
