Leakage control and Dam Safety works to Dimbhe Dam Across river Ghod near village Dimbhe Bk tal Ambegaon Dist Pune under dam safety Act 2021

Amount

Item No. 1 : Raking out the Construction joints/monolith joints material completely upto a depth of minimum 100 mm & width of 300 mm on either sides of joint, upstream surface of dam. Removing the deteriorated existing guniting and other mortar system, thoroughly cleaning the surface of the joints to remove all the loose particles, fungus and scale formation by using air blower and water jet pressure.Monolith joints shall be sealed by epoxy putty. After sealing the joints insert the stainless steel nozzles vertically 1 m center to center for injecting the PUF (polyurethane foam) grout. Grouting shall be done using highly reactive, two components, solvent free, polyurethene injection resin like MasterRoc MP 355 ST(Manufacturer- MBS/BASF, Ardex, Cipy) or equivalent to instantly plug heavy gushing leakages. Pre-packed Part A and Part B shall be injected in 1:1 ratio using a two component injection pump equipped with a static in-line mixer injection nozzle. All the works shall be done as directed by the project Engineer/ Engineer-in-charge, inclusive of charges for all materials, scaffolding, electricity, labour, tools, hanging platform, pullys and plants etc.complete. (Monolith Joint Treatment Above water)

Item No. 2 : Raking out the Construction joints/monolith joints material completely upto a depth of minimum 100 mm & width of 300 mm on either sides of joint, upstream surface of dam. Removing the deteriorated existing guniting and other mortar system, thoroughly cleaning the surface of the joints to remove all the loose particles, fungus and scale formation by using air blower and water jet pressure.Monolith joints shall be sealed by epoxy putty. After sealing the joints insert the stainless steel nozzles vertically 1 m center to center for injecting the PUF (polyurethane foam) grout. Grouting shall be done using highly reactive, two components, solvent free, polyurethene injection resin like MasterRoc MP 355 ST(Manufacturer- MBS/BASF, Ardex, Cipy) or equivalent to instantly plug heavy gushing leakages. Pre-packed Part A and Part B shall be injected in 1:1 ratio using a two component injection pump equipped with a static in-line mixer injection nozzle.Including cost of divers and diving equipments like Kirby morgan box, Face mask, Diving suits, Fins, underwater lighting and communications systems, Demand valves, umblicals, Pneumatic tools, HP bottles, Oxygen bottles, Weight belts, Diving bell, Diving platform, Hoisting machineries and all other auxillary equipments like compressor, Decompression chamber etc., complete including cost of compressible hydropholic material proposed . The work is also inclusive of colour video monitoring wherever directed including covering all activities viz raking monolith joints to the required depth, cleaning of joints by brushing using pneumatic tools. Under water works using necessary equipments such as under water video camera monitoring unit with TV set for display at top with reference to marking grids on the face of dam including cost of all equipments etc. colour video recording also should be done for covering the above activities wherever directed for works under water upto average depth of 10 to 22 mtr of upstream face of Dimbhe dam etc complete and delivery of 4 (Four) sets of recorded DVD's etc. as directed by engineer Incharge. (below water)

Item No. 03 : Providing under water pointing to masonry joints including mechanical raking to a depth of 50 mm, cleaning and brushing the joints in the exposed face of masonry, filling up of voids for a reasonable further depth well supported to the existing cement mortar using epoxy mortar/ suitable compounds applicable under water , having well adhesion to rock, cement mortar in underwater condition of depths 10 m to 22 m , proven and tested, non shrink, rapid setting, conforming to EN/BIS or relevant standards ,including cost of divers and diving equipments like Kirby morgan box, Face mask, Diving suits, Fins, underwater lighting and communications systems, Demand valves, umblicals, Pneumatic tools, HP bottles, Oxygen bottles, Weight belts, Diving bell, Diving platform, Hoisting machineries and all other auxillary equipments like compressor, Decompression chamber etc., complete including cost of epoxy compound proposed . The work is also inclusive of colour video monitoring wherever directed including covering all activities viz chipping / raking to the required depth, cleaning of joints by brushing using pneumatic tools and under water pointing works using necessary equipments such as under water video camera monitoring unit with TV set for display at top with reference to marking grids on the face of dam including cost of all equipments, labours, divers etc., colour video recording also should be done for covering the above activities wherever directed and delivery of 4 (Four) sets of recorded DVD's etc., complete with all lead and lifts and as directed by the Engineer-in-charge. (below water)

Item No. 04 : Carrying out detailed physical investigation of Dimbhe dam (Masonry dam) with Electrical Resistivity Imaging Method to find the seepage path, cavities and water saturation areas in the masonry of dam body including cost of all materials. Machinery, equipment’s, labour, insurance charges, transportation with all leads and lifts and any other incidental charges etc. making of reports in soft copies and hard copies. The results should provide pictures of internal resistivity distribution of the dam structure, identifying areas of water saturation in the dam body, and thus identifying the zones of water accumulation and wetting etc. complete.

Item No. 05 : Carrying out detailed physical investigation of Dimbhe dam (Masonry dam) with Streaming potential method to infer seepage patterns and concentrated seepage flows and to identify the zones in the dam body through which seepage is taking place. The results are correlated with resistivity sections. including cost of all materials. Machinery, equipment’s, labour, insurance charges, transportation with all leads and lifts and any other incidental charges etc. making of reports in soft copies and hard copies etc. complete.

Item No. 06 : Carrying out detailed physical investigation of NOF section Dimbhe dam (Masonry dam) with Multichannel Analysis of Surface Waves (MASW) method is one of the seismic survey methods evaluating the elastic condition (stiffness) of the ground., this method measure seismic surface waves generated from various types of seismic chasssledge hammer analyses the propagation velocities of those surface waves, and then finally reduces shear-wave velocity (Vs) variations below the surveyed area that is most responsible for the analysed propagation velocity pattern of surface waves including cost of all materials. Machinery, equipment’s, labour, insurance charges, transportation with all leads and lifts and any other incidental charges etc. making of reports in soft copies and hard copies etc. complete.

Item No. 07 : Carrying out detailed physical investigation of Over Flow section Dimbhe dam (Masonry dam) with Cross face Tomography method. Seismic Tomography is conducted in two configurations. In first configuration, tomography (L-section tomography) is conducted between dam top/spillway crest and galleries. In second configuration, tomography (cross face tomography) is conducted between two faces of the Dam. Tomography provides high resolution details of internal structure. including cost of all materials. Machinery, equipment’s, labour, insurance charges, transportation with all leads and lifts and any other incidental charges etc. making of reports in soft copies and hard copies etc. complete.

Item No. 08 : Carrying out detailed physical investigation of Non Over Flow section Dimbhe dam (Masonry dam) with Cross face Tomography method. Seismic Tomography is conducted in two configurations. In first configuration, tomography (L-section tomography) is conducted between dam top/spillway crest, Inspection/Foundation galleries. In second configuration, tomography (cross face tomography) is conducted between two faces of the Dam. Tomography provides high resolution details of internal structure. Including cost of all materials. Machinery, equipment’s, labour, insurance charges, transportation with all leads and lifts and any other incidental charges etc. making of reports in soft copies and hard copies etc. complete.

Item No. 09 : Providing and applying under pressure, a highly reactive, two component Polyurethane injection foam like MasterRoc MP 355 ST(manufacturer MBS/BASF, Ardex, Cipy) or equivalent. The component A and B shall be mixed to 1:1 proportion by volume via a mechanical pump as per the recommendation of the manufacturer inclusive of manpower, material and equipment. The two component injection pump shall be equipped with a static in line mixer nozzle and no separate 2 component mixing shall be allowed. ( Grouting PU Foam to Monolith Joints)

Item No. 10 : Providing and injecting cement grout in masonry of Dimbhe Dam for required proportion in the drilled holes at the required pressure. Grouting shall be carried out using Microfine cement. The mix shall be added with necessary dispersion media and plasticizers and accelerators, so that at 1:1 proportion necessary workability and penetration shall be achieved. Accelerator shall reduce the setting time to less than 20 minutes.The Item shall include carrying all necessary equipments, tools, plants, machinery on site along with labour and required materials including transportation etc. complete. (Grouting Micro fine cement)

Item No. 11 : Drilling 75 mm dia perforated casing pipes holes for Bentonite grouting by percussion drilling from upstream face of Dimbhe dam under water at depth of water approximately 10 to 22 mtr. As directed including cleaning and flushing the drilled holes conveyance of all equipment, divers, all other ancillary operation etc. complete as per direction of Engineer incharge. (Drilling for Bentonite Grouting)

Item No. 12 : Providing and injecting Bentonite grouting, in backfilled ground on upstream side of dam with the mixture of Bentonite clay and micro-fine cement at pressure of 3 Bars. The holes very close to the surface, reaching at the heel of dam. Inclusive of divers of under water working and all mechanism setup for Dimbhe dam upstream face below water at the average depth of 10 to 20 mtr. Conveying all machinery equipment and necessary tools, all leads and lifts etc. complete. (Bentonite Grout Injection)

Dynasoure Concrete Treatment Pvt Ltd (BID ID -6635687)

RDECON STRUCTURAL SOLUTIONS PRIVATE LIMITED (BID ID -6637408)

SHIVA STRUCTURES PVT LTD (BID ID -6645320)

Pioneer Foundation Engineers Pvt Ltd (BID ID -6640333)

R.K.Drillers (BID ID -6641464)

PSI ENTREPRISES (BID ID -6641547)

Naik COnstruction Company (BID ID -6645292)