Lashis-Gele RC Tank (500m3)

Part of Lanchkhuti City Water Supply System

Existing RC Tank Status

Originally planned repairs of existing RC Tank by cleaning or plaster and ironing of walls & roof slab - not implemented due to deteriorated condition of the Tank. Photo: Lack of concrete cover for roof slab re-bars caused corrosion & disconnection leaving the re-bars to hang from the Columns.

Existing RC Tank Status

Multiple leakages recorded, previous repair attempts by plastering of surface not successful.

During the original construction of existing Tank – concrete cover has not been provided for roof slab re-bars, instead – plaster was applied, which has falling off repeatedly. High moisture environment caused severe corrosion of steel reinforcement.

Planned Construction Method

Existing Tank shell to be used for construction of new RC Tank

Preparation for Demolition Works

Soil Cover (30cm) & remaining hydro-insulation removal

Existing RC Tank – Roof Slab Demolition

To enable entry for construction of new RC Tank

Existing RC Tank – Roof Slab Demolition

Existing RC Tank Shell – Roof Slab Demolition

Removal of debris

Existing Tank Shell

Leakages mostly present on construction joints between wall’s horizontal segments. Originally – no water stop was used between wall’s segments during concrete pouring

Existing RC Tank Shell – sealing of leakages

RC Tank - New Outlet Piping

Pipeline supporting structures in erection

RC Tank - Outlet Structures

-Shutter Chamber; -Manual Valve – CL meter Shaft; -Ultra-sonic Flow Meter Shaft

New RC Tank – Base Slab Reinforcing

Works

New RC Tank – Base Slab Concrete

Installation

Quality Control – Slump Test

Slump test on each mix-truck concrete delivery as standard concrete workability control.

Quality Control – Concrete Temperature

Control

Quality Control – Concrete Molds

Compressive Strength Test molds for each structural concrete installation.

New RC Tank – Wall Reinforcement Works

New RC Tank Wall Reinforcement /

Formworks

New RC Tank Wall Formworks

Right upper corner – new Double Bunker Type CL gas Chlorinator Building construction on Tank’s inlet section.

New RC Tank Wall Formworks

New RC Tank Wall Concrete Pouring

Shutter Chamber and Outlet Pipelines

New RC Tank – Columns Formwork

New RC Tank – Columns Formwork

New RC Tank – Roof Slab Formwork

New RC Tank – Roof Slab Formwork

New RC Tank – Roof Slab Reinforcing

Works

New RC Tank – Hydro Insulation

New RC Tank – Hydro Insulation

New RC Tank – Interior

New RC Tank – Interior

New RC Tank – Interior

New RC Tank – Interior

New RC Tank – Interior

New RC Tank – Interior

New RC Tank – Final Status

Ventilation Pipes, Access Manholes, Light Posts installed. Right - Chlorine Gas Chlorination Building (Double Bunker Type).

New RC Tank – Final Status