Page 17 - Building Regulation and Design Guidelines - Structural (Grey Code)

SECTION: 1
SECTION: 1
SECTION: 1 GEOTECHNICAL GUIDELINES & REGULATIONS SECTION: 1 GEOTECHNICAL GUIDELINES & REGULATIONS
GEOTECHNICAL GUIDELINES & REGULATIONS
GEOTECHNICAL GUIDELINES & REGULATIONS

DEWATERING WELL
To Main Line Installation level
Flowmeter
Internal tube for
Platform
Well caslng( 400-450mm Dla)
RAFT Water Prooling RAFT External tube for
membrane
Bored hole(800-1000mm) Smooth
Steel Tube
1600mm
Discharge from pump
R.c.c Smooth Tube Tube of
pipe entry form Repression Calibrate Filtration Gravel
deep well open 600mm Depth Filter material(3/8 Aggregate)
Filing
block work
400mm
Internal tube for
P.C.C
Perforated
100mm Steel Tube External tube for
200mm 80mm Submersible pump
TYPICAL WELL PIT Excavation Excavation
(Dewatering runing, well pit open) 800-800mm PERFORMED TUBE
W.T. W.T.
TYPICAL CROSS SECTION OF External Tube
DEEP WELL Well Toe & Tube
Fig. (1.13): Well Pit Details (Running / Finished) Stopper
Fig. (1.14): Details of Dewatering Deep Well

TO MAIN LINE Installation level
Initial Water Table level
Raft Raft
Genaral P.c.c 1600mm

R.c.c
Deep Well Closed
600mm H
Fitting Final excavation level
Block Work
Final Water Table Level after drawdown
Drawdown curve
P.c.c
100MM h
80MM Level of water retalned in the well
200MM
hw
WELL PIT DETAILS
Fig. (1.14): Details of Dewatering Deep Well
Fig. (1.13): Well Pit Details (Closed)

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