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Deepwell wellhead |
J1035 CTRL 320 Thames Tunnel: Cut down dewatering well head in TBM launch chamber |
all, deepwell systems, discharge arrangements, railways, tunnels |
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Deepwell dewatering for TBM launch chnamber |
J1035 CTRL 320 Thames Tunnel: Cut down dewatering well head in TBM launch chamber |
all, deepwell systems, railways, tunnels |
 |
Internal dewatering wells for cut and cover tunnel approach |
J1035 CTRL 320 Thames Tunnel: Wells installed within approach structure to allow dewatering to continue until roof and backfill complete |
all, deepwell systems, railways, top down construction, tunnels |
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Dewatering wells for braced excavation |
J1035 CTRL 320 Thames Tunnel: Internal deepwells for cut and cover approach |
all, deepwell systems, excavations, tunnels |
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Dewatering for TBM launch chamber |
J1035 CTRL 320 Thames Tunnel: Deepwell dewatering for TBM launch chamber |
all, deepwell systems, railways, tunnels |
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Internal deepwells for railway approach |
J1035 CTRL Thames Tunnel: Cut and cover tunnel with sheetpile side support and substantial propping |
all, deepwell systems, railways, tunnels |
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Permament dwatering scheme using horizontal wells |
J1244: Permanant drainage scheme for railway tunnel suffering groundwater and sand ingress |
all, permanent drainage, shafts, tunnels |
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The Conwy Crossing North Wales under construction |
Main ejector pumping ststaion for the excavation for the western approach structure |
all, ejector systems, excavations, roads, tunnels |
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In-tunnel wellpoint |
Completed sub-horizontal in-tunnel wellpoint in Thanet Sand |
all, tunnels, wellpoint systems |
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CTRL Thames Tunnel northern approach |
Reception chamber and cut and cover tunnel; note discharge buffer pond |
all, discharge arrangements, railways, recharge systems, tunnels |