This paper presents the behavior and performance of diaphragm walls constructed for basements of two buildings along the bank of the Chao Phraya River bank, Bangkok, Thailand. These buildings were constructed at different periods under one contract. A case history on basement excavation of the first building has been reported previously by Thasnanipan et al. (1998). For the second building, more numbers of instrumentation including VWSGs in a diaphragm wall panel and pressure gauges in struts to monitor stress in the wall and the performance of bracing system were used respectively. The construction sequence adopted for excavation, performance of the walls and bracing based on instrumentation results are discussed.
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