AJRT Regulating Tank 2x35.000m3 Areal View
Man Made River Project IV Phase - Ghadames Project
Al Jewaibyah Regulating Tank 2x35.000m3 Construction
Reservoir schematic overview
Sub-grade Verification Test
Standard Penetration Test (SPT)
Regulating Tank Structural Fill
Structural Fill applied in layers over the sub-grade , level of achieved compaction determined over Field Density Test (FDT)
Plate Load Test
Conducted over the final layer of structural fill.
Regulating Tank - Structural Fill
Final layer of structural fill, compacted, leveled and ready for blinding concrete
Regulating Tank Blinding Concrete
Blinding Concrete (Class C) Design: W=185kg/m3; Cement=300kg/m3; Agg=1.880kg/m3; Add=2.4kg/m3.
AJRT Tank Bottom Slab
Formwork drawing - bottom slab plan
Base Slab - Corrosion Protection
2mm thick PE Sheeting between Blinding Concrete and Base Slab concrete as corrosion protection
Bottom Slab - Sections
Compressible Material
Extruded Polystyrene Type I (ASTM C578) laid on the top of Blinding Concrete (Class C)
Base Slab Reinforcement
Steel Reinforcing Works (ASTM A615):
-Ø>14mm GRADE 60, Yield Strength = 400MPa, deformed; -Ø=12mm GRADE 40, Yield Strength =280MPa, deformed; -Ø<12mm MILD Steel, Yield Strength =250MPa, round
Base Slab Formwork
RMD Kvikform Base Slab shutter with visible black corrosion protection (PE sheet) for later overlapping to vertical surface of the Reservoir wall.
Base Slab Formwork
RMD Kvikform, wall kicker 10cm height
Batching Plant
New Batching Plant erected for supply of Regulating Tank concrete works
Batching Plant
Batching Plant & Cement Silos
Batching Plant with Chiller, Silos,
Aggregate Separator
Batching Plant Chiller
For regulation of concrete temperature in Saharan Desert climate. During the production, concrete temperature on delivery to the Site did not exceed 32°C although ambient temperature often reached 52°C.
Batching Plant Controls
Batching Plant
Automatic mixing & control
Batching Plant Aggregate Separators
Sand blowing for decrease of fine materials
Concrete Quality Control
Cylinder moulds for sampling of concrete
Fresh Concrete Quality Control - Workability
Slump Test
Fresh Concrete Quality Control –
Air Content
Regulating Tank – Outlet Section Base
Slab Concrete
81nr of Base Slab modules (max width 15x15m). The sequential bay method of construction has been used with each consecutive bay having at least two adjacent free edges and not more than two adjacent edges continuous with previous bays
Concrete Works
Trowell of the Base Slab concrete surface, over applied curing compound BASF Masterkure 106D; SIKA
Base Slab Structural Concrete
Concrete Class A: (W=189kg/m3; C=386kg/m3; W/C=0.49 ; Agg=1.830kg/m3; Add=3,1kg/m3) Cement – Type II, ASTM C150; Additive BASF Lubricon L-200, BASF Melcret TB101 Type G
Construction Joints – Water Stop
SCP Ltd - 25x8mm Dual Seal Swellable Water Stop
Swellable Water Stop
SCP Ltd - 25x8mm Dual Seal Swellable Water Stop
Walls – Work Plan
Regulating Tank Walls Formwork
RMD Kwikform Shuttering System
Regulating Tank Walls Formwork
In total 55nr of Wall-segments installed with concrete, max modular wall-length = 15m’, height = 6.06m; width = 0.45m
Regulating Tank Walls Formwork
Regulating Tank Walls Concrete Installation
Construction Joint Base Slab / Walls /
Walls
SCP Ltd - 25x8mm Dual Seal Swellable Water Stop between each of 55nr modular wall-segments
Construction Joint Base Slab / Walls
SCP Ltd - 25x8mm Dual Seal Swellable Water Stop
Walls, Columns & Roof Slab - Sections
Columns Formwork
RMD Kwikform, Columns Ø400mm
Columns Formwork
RMD Kwikform Column-kickers
Regulating Tank Columns (500nr)
500nr Columns Ø400mm Concrete Class A (W=189kg/m3; C=386kg/m3; W/C=0.49 ; Agg=1830kg/m3; Add=3.1kg/m3)
Regulating Tank – Roof Slab Formwork
RMD Kwikform Scafffolding
Roof Slab - Sections
Regulating Tank – Roof Slab Formwork
Regulating Tank Partition Overflow
Wall
Partition Overflow Wall dividing Regulating Tank onto 2 separate Water Chambers (2x35.000m3)
Roof Slab Reinforcement Works
Access Manhole openings– DN600
Roof Slab Reinforcement Works
81nr of Roof Slab modules (max width 15x15m), with 25x8mm Dual Seal Swellable Water Stop in construction joint between each slab
Roof Slab Concrete Installation
Roof Slab d=300mm; Concrete Class A (W=189kg/m3; C=386kg/m3; W/C=0.49 ; Agg=1830kg/m3; Add=3.1kg/m3) Cement – Type II, ASTM C150; Additive BASF Lubricon L-200, BASF MELCRET TB101 Type G
Regulating Tank View during construction
Roof Slab
Survey verification of Roof Slab plywood formwork (behind visible tower-crane and concrete pouring of columns)
Regulating Tank Roof Slab
Reservoir height bottom to roof slab -6,06m, 500nr columns, 81nr base slab, 81nr roof slab modules (max width 15x15m), with 25x8mm Dual Seal Swellable Water Stop in construction joint between each slab
Regulating Tank Roof Slab
The sequential bay method of construction has been used with each consecutive bay having at least two adjacent free edges and not more than two adjacent edges continuous with previous bays
Regulating Tank Access Manhole
Sealing of Tie-rod holes, finishing works remaining
Outlet Shafts & Overflow
Outlet Shafts & Overflow
Regulating Tank Overflow Pipe
Penetration
Overflow Steel DN1600mm Pipe Nozzle (25x8mm Dual Seal Swellable Water Stop & elastic sealing 2x1.5cm)
Regulating Tank – Overflow Pipe Wall
Closure of Wall Shutter
Regulating Tank Overflow Pipe
Shutter gaps sealing, centering of the Steel DN1600 Pipe elevation
Regulating Tank Outlet Shaft 1
Outlet Shaft with Steel DN1400mm Pipe
Regulating Tank Outlet Shaft 2
Reinforcement Works on Outlet Shaft 2 with Steel DN1400mm Pipe
Outlet Shaft 1
Formworks
Outlet Shaft 1
Concrete Installation
Outlet Shaft 1
Inlet & Drain Shaft
Inlet & Drain Shaft
Inlet Section – Integrated Surge Shaft
Regulating Tank Partition Wall visible at the back
Regulating Tank Inlet & Surge Shaft
Inlet Pipes Steel DN1200mm
Inlet & Tank Integrated Surge Shaft
Steel DN1200 Pipes
Inlet Surge Shaft with Inlet DN1200 pressure
pipes
Wall’s reinforcement works, pipe nozzles positioning and anchoring in progress
Surge Shaft Wall Formworks
Surge Shaft
Surge Shaft Corrosion Protection
All buried concrete surfaces in contact with soil are protected by Coal Tar Epoxy coating, average dry film thickness 150 microns to give overall dry film thickness of 450microns. Underside of bottom slab protected by 2 PE sheets with friction coefficient <0.1
Inlet Surge Shaft – Tank’s Base Slab gap
To be filled with Soil cement.
Surge Shaft – Compressible Material
Corrosion Protection: AmerCoat 78 HBB Resin Black + Cure (1:4); DoeCote 1080H + DoeClean 1080 (1:4)
Surge Shaft – Compressible Material
Corrosion Protection: -Compressible material – Polystyrene 5cm -- 3nr layers of Coal tar Epoxy (min 450 microns)
Inlet Surge Shaft Soil Cement filling
Soil Cement Mix Design: W=300kg/m3; Cement = 140kg/m3 (5% of Soil mass); W/C=2.1; Agg=1760kg/m3; Add=0.44kg/m3
Tank’s Integrated Surge Shaft – Soil
Cement filling
Slump = 5 - 15cm; Minimal 7-days strength = 0.7MPa
Integrated Surge Shaft, Partition Wall between
Water Chambers
Regulating Tank Inlet side overview
Regulating Tank Overview during
construction
Regulating Tank Drain Shaft – Reservoir
Sump
Base Slab reinforcement works, Drain Steel Pipe DN250mm, Sump (750x750x300mm)
Drain Steel Pipe DN250mm Wall
Penetration
Pipe nozzle wall penetration, swellable water stop, elastic sealant for prevention of water leakage.
Regulating Tank Drain Shaft – Tank’s Sump
Internal Expansion Joint with Water Stop between Reservoir Sump and Drain Shaft
Regulating Tank Drain Shaft – Tank’s Sump
Internal Expansion Water-Stop (400mm) left for connection with Drain Shaft
Regulating Tank view during
construction works
Regulating Tank view during construction
Supporting Tower Crane, Batching Plant Silos visible on the right side
Inlet Overflow Weir Wall
Height of Weir (Overflow Wall) top 50cm lower than Roof Slab bottom
Regulating Tank Corner Walls
The sequential bay method of construction has been used with each consecutive bay having at least two adjacent free edges and not more than two adjacent edges continuous with previous bays
Regulating Tank View
Regulating Tank Outlet Section View
Details
Details
Regulating Tank Roof Slab
Maintenance Opening 3x3m
Regulating Tank Roof Slab
Maintenance Opening 3x3m
Regulating Tank Roof Slab Maintenance
Opening 3x3m
View from inside of the tank
Regulating Tank Roof Slab Works
Inlet Overflow Weir Wall visible on left side
Regulating Tank Outlet Shaft 2
Assembling of Steel Pipes DN1400
Regulating Tank Outlet Shaft 2
Welding of DN1400 Steel Pipes in protected environment. Reservoir Overflow DN1600 Steel Pipe visible on upper left side
Regulating Tank Outlet Section
Outlet DN1400 Steel Pipes aligned and welded. Reservoir Overflow DN1600 Steel Pipe visible on upper left side
Regulating Tank Outlet Piping DN1400
View towards downstream Pump Station
Regulating Tank Outlet Pipe – towards Pump
Station
Regulating Tank Outlet View
Steel DN1400 Pipes, Outlet Shafts Walls Reinforcement works visible
Regulating Tank Inlet Section Shafts
Transition from DN1600 PCCP (Pre-stressed Concrete Cylinder Pipes) to DN1200 Steel Pipes
Regulating Tank View
Regulating Tank Outlet with Overflow
Discharge
Regulating Tank Outlet with Overflow
Discharge
Regulating Tank Outlet with Overflow
Discharge
Overflow Discharge
Regulating Tank – on First Water
First Water on 4th November 2009
Regulating Tank – on First Water
First Water on 4th November 2009
Regulating Tank – on First Water
First Water on 4th November 2009
Regulating Tank on First Water
First Water on 4th November 2009