PROVISION OF CONSULTANCY SERVICES FOR NDT OF BOAT POOL JETTY AT INS MANDOVI

Determination of the existing structural stability and residual life of the Boat Pool Jetty at INS Mandovi by conducting a comprehensive structural audit including various Non-Destructive Tests (NDT), underwater inspections, surveys, and technical studies, and preparation of a detailed technical report recommending whether the jetty requires repair, strengthening, rehabilitation, or reconstruction. The report shall also include detailed technical specifications, repair methodology, item wise quantity assessment, and material specifications for all recommended repair/rehabilitation works required for restoration and long-term serviceability of the jetty structure. The agency shall carry out the following inspections and tests on the jetty structure:-

Visual and Condition Survey A thorough visual inspection of the entire jetty structure shall be carried out, covering the superstructure, substructure, and all exposed elements. The survey shall document visible defects including cracks, spalling, delamination, corrosion staining, erosion, and marine growth.

Underwater Inspection A complete underwater inspection of the jetty substructure, piles, and pile caps shall be carried out by qualified divers. The inspection shall document the condition of structural elements below the waterline, including scour, marine fouling, corrosion, and physical damage.

Non-Destructive Tests (NDT) (A) Rebound Hammer Test: To assess surface hardness and estimate compressive strength of concrete as per IS 13311 (Part 2). (B) Ultrasonic Pulse Velocity (UPV) Test: To assess the homogeneity and quality of concrete and detect internal voids/cracks as per IS 13311 (Part 1). (C) Half-Cell Potential (HCP) Test: To assess the probability of active corrosion of reinforcement as per ASTM C876. (D) Cover Meter Survey: To determine the depth of concrete cover and location of reinforcement bars throughout the structure. (E) Carbonation Depth Test: To determine the depth of carbonation front and its proximity to reinforcement. (F) Core Extraction and Compressive Strength Test: Core samples shall be extracted and tested as per IS 516. Core-cut areas shall be restored using high-strength epoxy concrete at no additional cost. (G) Chemical Analysis of Concrete: Chemical tests shall be carried out to determine pH, chloride content, and sulphate content in accordance with IS 1199 and IS 4031, as applicable (H) Chloride Profile / Penetration Depth: Testing shall be carried out to assess chloride ingress depth in marine exposure conditions. 2.3.9 Pile Verticality Check: The agency shall carry out pile verticality/alignment checks using suitable underwater survey methods to determine tilting, displacement, or deformation of piles. 2.3.10 Bathymetric / Scour Survey: The agency shall carry out bathymetric survey around the jetty structure to determine seabed profile, scour depth, and underwater obstructions near pile foundations.

(J) Pile Verticality Check: The agency shall carry out pile verticality/alignment checks using suitable underwater survey methods to determine tilting, displacement, or deformation of piles. (K) Bathymetric / Scour Survey: The agency shall carry out bathymetric survey around the jetty structure to determine seabed profile, scour depth, and underwater obstructions near pile foundations. (L) Concrete Resistivity Test: Concrete resistivity testing shall be carried out to assess corrosion activity and durability of reinforced concrete members under marine exposure. (M) Drone Photography / Mapping: Drone-based aerial photography/videography and mapping shall be carried out for visual documentation, defect mapping, and condition assessment

FORMAL REPORT On completion of all inspections and tests, the agency shall prepare and submit a comprehensive formal report covering the following: (a) Tests carried out, including methodology, equipment used, and locations of testing. (b) Methodology followed for each test type. (c)Results obtained and their interpretation, including graphical and photographic documentation. (d) Condition survey report with drawings/sketches/photographs showing the location and extent of defects. (e) Assessment of residual life and structural adequacy of the jetty. (f) Drawings/sketches and underwater survey records. (g) Photographic documentation (h) Recommended corrective action, including detailed technical and material specifications for all repair/rehabilitation works, along with the methodology for carrying out such repairs. Technical specifications, repair methodology, item wise quantity assessment, and material specifications for all recommended repair/rehabilitation works required for restoration and long-term serviceability of the jetty structure

VETTING OF STRUCTURAL AUDIT REPORT The structural audit report shall be vetted only through the National Institute of Technology (NIT) or Indian Institute of Technology (IIT) after completion of all inspections, testing, surveys, and preparation of the draft report. The contractor shall submit:- (a) Four hard copies of final report (b) One soft copy in editable and PDF format (c) Underwater photographs & videos and drone survey records hard copy and soft copy as directed. The complete cost towards vetting, review, modifications, observations compliance, liasoning, travelling, and final approval from IIT/NIT shall be borne by the agency and shall be deemed to be included in the quoted rates. No extra payment shall be admissible on this account.

PAYMENT SCHEDULE 50% payment after acceptance of preliminary report 100% payment after acceptance of final vetted report.