Grouting Manmade Island - Chesapeake Bay Bridge

by Byron J. Prugh,

Serial Information: Journal of the Construction Division, 1966, Vol. 92, Issue 1, Pg. 37-52

Document Type: Journal Paper


The procedure, equipment, materials, and field installation are described for grouting boils that appeared from the chime and screeded gravel under the tube section where the crossing made the transition from tunnel to the open ramp on the manmade sand islands of the Chesapeake Bay Bridge-Tunnel. Soil conditions and construction procedure of the tube placement and cofferdam construction that made conventional construction dewatering difficult at the face junction are given. Boils were encountered on two of the four islands and were grouted after temporary containment by sand dikes. An inexpensive viscous bentonite-cement-fresh water grout was mixed and pumped with centrifugal pumps. This grout remained plastic after setting yet was retained in the large voids of the pervious soils. The fourth island was grouted before excavation, thus reducing the dewatering difficulties.

Subject Headings: Soil grouting | Construction management | Grouting | Islands | Bays | Bridges | Tunnels | Sand (material)

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