Two Case Studies of Collapsed Temporary Excavation using Contiguous Bored Pile Wall

Engineering failure investigation is a detective process of determining why and how things went wrong. Forensic engineering can be defined as the application of the engineering sciences to the investigation of failures or other performance problems, with a focus on uncovering causes so that improved facilities can be engineered. The first stage in determining the failure causes is the investigative synthesis, where all the information gathered is recorded in a logical manner, typically in a report format and in chronological order. The following details are generally required from the Client for undertaking a excavation failure investigation study: i. Subsurface Investigation (SI) factual Report. ii. Geotechnical design report prepared by the consultant (if available) iii. Original topography of the site (before earthworks) iv. Earthworks plan and cross-sections v. Permanent retaining walls and temporary strutting design analyses and calculations by the consultant or/and contractor vi. Detailed construction drawings of the walls and its excavation and strutting sequences vii. As-built drawings of the basement walls viii. Construction sequences adopted at site ix. Weather records of the site x. Instrumentation monitoring reports xi. Site records and reports of the incident ABSTRACT