Measures to prevent heaving during the excavation of soft ground

摘要

This paper describes the heaving phenomenon and the cause of that during the large-scale excavation in the soft ground which has been reclaimed just recently in Haneda area. In spite of efforts to stabilize the earth retaining wall by means of ground improvement of the excavation bottom, the symptom of heaving was observed. By early detection of such symptom and adequate mesures, the work could be completed without incident.