Project Scope
The overall project scope is to construct “Chancery Complex and Ambassador’s Residence”and detailed in the drawings, specifications and BOQ as per the contract document. Project Details
Procurement & Constriction of 3 storied Office Building, 3 storied Multipurpose Hall with semi-basement, 2 storied Ambassador’s Residence with semi-basement, 4 storied Staff Quarter with semi-basement , Service Block (Pump Room), 3 no guard post. Electrical works, Sanitary & Plumbing works, Electro-Mechanical works. (HVAC, Lift,, Fire Fighting System, CCTV System, Conference System , PABX System, Sound System, Sub-station, Generators, Pump-motors) Interior decoration, Site Development Internal Road, Boundary Wall, Water body, Sewerage Treatment Plant, Septic Tank, External drainage System, Landscaping, Arboriculture, Traditional painting, commissioning of a bust of Bangabandhu Sheikh Mujibur Rahman etc, at Thimphu, Bhutan.
- Project Duration: 633 Working Days
- Anticipated Tender Award: 1st September 2021
- Construction Start: 23rd September 2021
- Construction Complete: 07th August 2023
- Project Handover & Closure: 24th August 2023
Project Objective
- To cater the client with a sustainable infrastructure within prescribed budget and time.
- Maintain high standards of workmanship and quality.
- Reduce impacts of construction on the environment.
- Avoid time and cost overrun.
Deliverables
There are various aspects of this project which can be broadly divided into following sub-categories to make this project a success:
- Block A [Chancery Office]
- Block B [Multipurpose Hall]
- Block C [Ambassador’s Residence]
- Block D [Staff Quarter]
- Block E
Project Construction Methodology
The construction programme associated with is anticipated to span a 24-month period.
Prior to the start of construction, necessary works will be carried out to prepare the Site for construction. These works are likely to comprise of the following main activities:
Surveys of any buildings or facility to be constructed with proper tools and expertise.
Installation of Site hoardings and establishment of construction Site;
Site preparation ready for foundation works;
Further Site assessment investigations and surveys to define ground conditions for construction (e.g. geotechnical properties, soil and groundwater quality, potential for contamination);
Site facility and office
Site office will be constructed with adequate facilities to ease the monitoring of the project. Office will facilitate meeting between client and contractor. Office boy will be appointed to ensure adequate operations.
Pre-Construction
Prior to construction commencing, a full review of the Development and all background information will be undertaken, including dialogue with relevant key stakeholders.
From this review an outline method statement for the construction of the facility will be produced and will form the basis of the on-going discussions with the concerned parties.
A pre-commencement safety risk register will be produced which will identify the high risk activities of the construction process. This will include:
Interface with neighbours;
Noise and dust;
Public protection;
Substructure works;
Frame construction;
Lifting operations;
External cladding; and
Building Services works.
Enabling Works
Initial site preparation works will comprise site clearance including clearing of rocks, debris, trees and bushes.
For the Site more generally, preparation works will also include the removal of topsoil and other vegetation as the vast majority of the Site is free of built development. This will be followed by an earth moving exercise to achieve required levels. Compaction of the engineered fill to create the final formation level will be carried out in layers using appropriate compaction plant.
Any removed soil will seek to be reused elsewhere on or adjacent to the Site for landscaping and/or land profiling purposes.
Waste will be managed in line with the principles of the Thimphu Thromde and the developer’s policies and procedures. Building materials will be reused where appropriate in line with sustainable building practice. Materials that cannot be reused will be transported off site for (preferably) reuse /recycling or (if not) disposal, acknowledging Thimphu Thromde.
Necessary drainage works will be carried out. Across the Site as a whole, this will involve implementing a range of sustainable urban drainage measures (SUDS), comprising a combination of pipes, swales/ditches and balancing ponds, in preparation to receive surface water runoff.
Drainage works will utilize wheeled or tracked excavators to form trenches into which drainage pipes are placed. The pipes themselves will be surrounded by either gravel or dry mix concrete dependent on their location, which will be placed in the trench using small dump trucks.
Road Network for transportation of materials and mobility of workers
Internal roads will be built, as an initial item of enabling works, an access road will be provided to the site office area, which is required to run through specified access points within the area of work for efficient transport of materials.
Civil Structural
Foundations and Substructures
Foundations are expected to include a mix of isolated and combined footings. Spoil arising will be sampled for potential contaminants.
Foundations will be formed using concrete, placed either by pumping or directly from the concrete wagon.
Superstructure
The superstructure will commence following sufficient progression of the substructures.
Concrete testing will be practiced before commencing casting work for footing, columns and beams. Inclusive of tests pertaining compressive strength, elasticity, durability and workability.
Proper brick construction techniques will be applied to the proposed brickwork.
For fair faced wall construction, it is anticipated that proper framework will be used for obataing smooth surface finish as specified. Proper supervision will be given in preparing the mixture, strictly following the ratios as specified.
Civil Finishing
Plastering work:
Before commencement of plaster work it will be ensured that brickwork has been laid to the true line and level. All cut outs and voids in the brickwork will be filled or treated. Block work will be properly filled with mortar and pointed. Required building services will be installed prior to commencement of plaster work.
Tiles, Marble, Granite:
Ceramic tiles, marble and granite fixing methods will be adopted as approved by consultant prior to procurement and delivery to site. Detailed method will be prepared specifically identifying material types, quality of finish and other important aspects upon award of the contract. Before commencement of tiling work in the wet areas waterproofing of the floor will be tested.
Pattern of laying tiles will be identified and clearly marked. Also setting out to the tiles level end datum will be established. Tiles delivered to site will be checked for dimensions, integrity, quality and conformance with the material submission.
Painting
The specific methods to be used for painting will be as per contract specification and drawings. Before painting work commence paint system has to be approved. Paint material delivered at site have to be checked against material approval.
Trial area of painting will be carried out and approved by the consultant. Before commencement with application surfaces will be dry and prepared for the paint as per manufacturers recommendations. Adequate protection will be arranged to avoid damage from paints spillage. Appropriate clean brushes, rollers or sprayers as required will be available for application of the painting material.
HVAC
The fixing of all air conditioning equipment, installation of all refrigerant pipe work, duct work, insulation work, drain pipe work and full commissioning shall be performed by, a specialist VRF installer who is authorized to install FUJITSU GENERAL Equipment.
In the course of installation best practice methodology will be applied in carrying out its duties and will strictly adhere to the following:
Retain the responsibility to advice of any aspects which, based upon experience, would appear to be inappropriate and/or likely to lead to operational problems.
Health & Safety at Work Act 1974, and all other relevant attendant legislation, particularly the management of Health & Safety at Work Regulations 1992, Personal Protective Equipment at Work Regulation 1992 and the Construction, Design and Management (CDM) Regulation 1994.
Ensure that all personnel are in possession of the appropriate personal protective equipment to comply with the Personal Protective Equipment Regulations 1992.
Ensure that all personnel are fully competent in the work they are tasked to perform and any claim to stated qualifications are valid.
Ensure that all personnel are instructed to comply with the prevailing site rules.
Must use calibrated and regularly checked tools. Electrical tools will be calibrated and checked annual
Upon completion of the works ensure that all debris is removed and the site is left clean and tidy to the satisfaction of the Customer.
Refrigeration Pipe work
Supply and installation of all interconnecting refrigerant pipe work will be carried out by New age Constructions. Air Conditioning design and installation instructions and standards will be followed holistically. All pipe work must be suitable for R410A/R407c as applicable. Longest possible lengths of copper pipe should be utilized to minimize joints on site. Furthermore all of the following points should be adhered to.
All copper pipes up to 1 1/8” (28 mm) outside diameter (O/D) shall be fabricated from refrigerant quality tube to BS EN 12449:1999. Tube shall be fully annealed up to 7/8” (22 mm) outside diameter (O/D) only. Tube shall be delivered to site internally degreased and shall be stored in clean dry conditions with ends sealed until required for installation.
All due consideration and allowances shall be taken to keep pipe work clean and dry during the installation works, ensuring that all pipe work unfinished ends are capped off at all times.
The number of joints bends and sets are to be kept to a minimum. Butt joints will not be accepted; properly swaged joints must be formed. Bends and sets are to be machine pulled to an approved radius where possible.
Flared joints must only be used when connecting to the manufacturer equipment.
Pipe work to be properly fixed and supported using a recognized industry approved support system.
Brazing shall be carried out in accordance with British Refrigeration Association Specification for Brazing and BS 14324:2004. Brazing rods shall be cadmium free and conform to BS EN 1044:1999. At all times, when brazing, a small amount of dry nitrogen must be purged through the pipe to prevent oxidation and scaling internally. Any component susceptible to heat during the brazing process that may be damaged must be protected. Soft solder shall never be used for jointing of refrigeration pipe work.
All completed R410A systems will be strength and leak tested with dry nitrogen as per itemized below and BS EN 378. If the system is found to be leak free, the final pressure readings for both strength and leak testing are to be witnessed by either the main contractor, the consultant or end-user and recorded in the test result Log Book.
21 bar, Strength test for a period of time that is acceptable to show any signs of deformation to the pipe work.
21 bar for final leak test for minimum 24 hours. Pressure testing signage will be clearly visible on site during testing periods.
All completed R410A systems will be leak tested with dry nitrogen as below and BS EN 378. If the system is found to be leak free, the final pressure readings for leak testing are to be witnessed and entered into the log Book.
Management of Waste
Waste will be generated during all stages of the construction. However, this will be carefully managed and cleared to prevent nuisances such as litter, dust, odor and pests, and to maintain a “clean” working and site environment, for the benefit of all parties.
Major sources of waste within the construction process are anticipated to include:
Surplus soils from the construction;
Packaging – plastics, pallets, expanded foams etc;
Waste materials generated from poor usage, badly stored materials, poor handling, spillage etc; and
Liquid wastes, other than surface water run-off and foul drainage, such as waste oils and chemicals.
During the construction phase, requirements for the management of waste will be communicated to all workers to ensure that waste is managed in accordance with the waste hierarchy and relevant statutory controls.
Where practical and suitable, surplus soil materials will be sought to be reused elsewhere on site. Careful consideration will be given to cut and fill volumes across the Site to minimize the waste quantities produced from engineering operations.
Clients Approval
To make this project a success, client’s acceptance and satisfaction is of prime importance. Workmanship should be of high standards. This project has to meet the prescribed time and cost.