Ground Movements Caused by Braced Excavations

by Thomas D. O'Rourke, (A.M.ASCE), Asst. Prof.; School of Civ. and Environmental Engrg., Cornell Univ., Ithaca, N.Y. 14853,

Serial Information: Journal of the Geotechnical Engineering Division, 1981, Vol. 107, Issue 9, Pg. 1159-1178

Document Type: Journal Paper

Discussion: Hansen Lawrence A. (See full record)
Closure: (See full record)


The causes and patterns of ground movement associated with braced excavations are examined. Field measurements of displacements for braced cuts in sand and soft to medium clay show a relationship between the deflection of the excavation wall and the ratio of horizontal to vertical movement adjoining the cut. A review of various case histories indicates that soil displacement depends strongly on the construction process. Practices are recommended for promoting a stiff bracing system, excavating beneath the lowest braces, and using berms to restrain ground movement.

Subject Headings: Bracing | Excavation | Ground motion | Displacement (mechanics) | Soft soils | Case studies | Sandy soils | Clays

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