Parameters -1) Length of the tunnel is 30.7 m
Sides-12 mm thickness MS sheet
Since the nature of work is confidential and pertaining to Indian army, we base our study on physical observations as shared by the officer-in –charge.
As per physical observations carried out, following data/information is collated. An existing tunnel for the purpose of restoration and stoppage of water leakages has been minutely studied/inspected for following challenges:
As the structure with above said detail is having leakage/seepage/dampness because of following reasons as observed
The leakage within the structure is continuous, less in summer season and highest in rainy season which is indicative of following
Surface Preparation-The area under leakage treatment has to be well repaired surface by mechanical or manual means (Sand Blasting/scarifying) to remove all loose lattinces, dirt,dust,corrosion,rust,formation of Ferrous oxides extra complete as per manufacturers specifications or instruction of Engineer In charge
Fixing of PVC nozzle complete after drilling at field welded/shock welded joints in the MS Plate and fixing nozzle with epoxy mortar/high strength repair mortar as per as per manufacturers specifications or instruction of Engineer Incharge
Injection of polymer cement slurry by electrically driven pump/manual operated pump with defined pressure and maintaining consistent slurry of Polymer(KUNACRETE) and Cement (OPC 43 Grade),admixed with Non shrink grouting polymeric cement(KUNABEX-100) as per manufacturers specifications or instruction of Engineer Incharge,allowing injected material to get cured for optimum technical properties.
Injection of Micro Fine Cement (KUNA MFC) with required water/powder ratio by electrically or manually operated injection pumps admixed with KUNA –ANTI Freeze admixture in defined proportions as per manufacturer’s specifications or instruction of Engineer Incharge, allowing it to get cured for optimum technical properties
Removal of nozzle for redrilling and fixing of Non Returned valve (NRV) packers of required size and fixing it in position as per manufacturers specifications or instruction of Engineer Incharge
njection of Flexible single component Polyurethane Foam (KUNA PUR Inject 1C Flex) and semi rigid Single component polyurethane foam (KUNA Pur Inject 1C Hydrofoam) by electrically driven pump with defined pressure complete as per manufacturers specifications or instruction of Engineer Incharge.
Application of Polyurea Primer over the prepared, dried and injected surface (KUNA UREA Prime) as per manufacturers’ specifications or instruction of Engineer Incharge
Application of Pure spray applied Pure, flexible Polyurea over the cured primer in 2-3 mm thickness as a seamless, flexible water proofing membrane over the steel surface with hot spray plural pump (GRACKO reactor or equivalent only) as per manufacturers specifications or instruction of Engineer Incharge.
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