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| 1 | Carrying out soil investigation at work site of various project under Air Force Barrackpore (Restricted Area) by drilling of bore holes of 10.00 meter deep and 150 mm dia and at various location as per IS 1892-1979 (Reaffirmed 2002), collecting samples of disturbed and undisturbed soil sample at 1.5m interval and at every change of strata. Drilling for 3.0m depth inside the rock is essential to ensure that boulders or layers of cemented soil are not mistaken for rock and conducting test as per relevant and latest IS code as mentioned below: - Number of test Holes:(a) Bore hole depth 10m deep and 150 mm dia – 4 no. ( Location of BH shall be shown by Rep of MES)Details and Tests required: (i) Grain size analysis, identification & classification of soil (ii) Unit weight (Bulk density), natural moisture content, liquid limit, plastic limit, shrinkage limit, plasticity index, specific gravity, dry density and degree of saturation of soil. (iii) Differential free swell index (%) & swelling pressure if expansive soil is encountered. (iv) Shear Parameters (C-Phi Analysis) and Consolidation test (for cohesive soil only) (v) Chemical analysis of soil and ground water (Water to be obtained from bottom of the bore hole) Depth of water table below (vi) Presence of loose soil if any. If weak soil with lesser N value as specified in table – 1 of IS 1893 (Part-1) 2016 is encountered then evaluation of liquefaction potential shall be assessed and remedial action to be adopted shall be specified. (vii) Crushing strength, degree of weathering (CR Value) and RQD of rock samples (viii) For open foundations, calculation of Net SBC at 1.5m, 2.0m, 2.5m, 3.0m from shear as well as settlement criteria. SBC value shall be calculated based on C-Phi analysis as well as SPT value. For calculations, formulae given in IS 6403 shall be used.(ix) Wherever pile foundations are recommended, type of pile, recommended depth of pile of different diameter etc shall be specified along with supporting calculations. Pile capacity in compression, uplift & lateral loads shall be given. (x)Recommendations regarding type of foundation to be adopted & net SBC/Pile capacities to be adopted Also recommendations shall be given regarding stability of soil and soil stabilization required, if any. |
| 2 | (xi) Bore log details duly marked on plan and their distance from adjacent prominent ref as per Appx D of IS 1892. N values depth wise shall also be shown in bore log details (xii) SPT shall be done till N value of 50 or refusal whichever is earlier.Note: Following will be in scope of order and must be the part of final report: - (a)Report shall be signed by a qualified engineer with degree in M. Tech having experience of minimum 02 Years. Then name and qualification of the signatory shall be clearly shown. (b)Soil investigation consultant should have minimum 01 No ME/M Tech (Geo Tech) with 2 Year experience & 01 no. BE/B Tech (Civ) with 5 Year Experience and must have all adequate tech staff diploma/ITI Qualified. (c)Labs must be govt approved/accredited or any other accreditation body which operates in accordance with ISO/IEC-170011 and accredits the lab as per ISO/IEC: 17025 with state-of-the-art equipment apparatus. (d)Recommendation of SBC should be given for :- • All the bore holes •Min at three depths viz 1.5m, 2.0m and 2.5m. • SBC shall be worked out for following sizes of footings i.e. 1.5X1.5m, 1.5X2.5m, 2.0X2.5m, 2.0X3.0m, 2.5X3.0m (e)Photographic records of exploration as well as the testing shall be form the part of the report. Also Soil or rock samples left out after tests shall be handed over to AGE B/R or Engr-in-Charge. (f) Recommendation as regards possibility of liquidation of soil in case of saturated or partially saturated loose/un-compacted sandy soils. (h) Swelling index and swelling pressure in respect of black cotton soil and its depth/layer. (i) Depth of ground water table (GWT) in peak monsoon and peak summer (highest) after correlation of result with seasonal variation of water table in the station. (j) Recommendation for filler under floors and improvements of existing subsoil using proper soil stabilization methods or stabilization of soil underneath foundation systems. |
| 3 | Consultancy services for for preparation of architectural and structural drawings for following works: -(a) Construction of Pyrotechnics and demolition stores in two compartments at AF Station Barrackpore (Plinth area – 61.00 sqm) (b) Construction of Pyrotechnic store and toilet block at AF Station Barrackpore- Plinth Area- (i) Pyrotechnic store - 11.00 sqm, (ii) Toilet block - 8.00 sqm, (iii) AOLO stand - 2.25 sqm (c) Construction of Aerospace Safety at AF Station Barrackpore (Plinth Area =163.47 sqm) Note:- (1)The job consisting of following services shall be carried out as brought out in subsequent paras and terms and conditions: -(A) Architectural drawings:-(a) Plans (of all floors) showing schedule of doors, windows, ventilators, fittings, fixtures, internal electrical fittings, schedule of finishes, furniture layout etc.(b) Roof plans.(c) Elevations of all four sides of all the buildings.(d) Suitable number of sections (showing all relevant details) including through staircases & toilets, WC, kitchen, cupboard, shelf and kitchen and other important locations.(e) Any other architectural detail needed by client.(B) Structural designs:-(a) Preparation and supply of structural design by using design software like STAAD/STRAP with load chart for entire structural components, viz. walls, columns, beams, slabs, staircases, tanks etc. along with structural analysis and design calculations duly vetted by any IIT/NIT/ Govt Engg College.(b)For design purpose life of expected life of buildings to be considered as minimum 80 years. The design shall be sound ,economical and as per best engineering practices suitable for the region. Design shall be complaint of provisions of all relevant IS Codes and statutory rules of Govt. of India and concerned state Govt for PEB structures DBR shall be approved.(c)Design and detailing shall be as per requirements applicable to Dibrugarh area i.r.o. seismic forces as per IS Code 1893 Part 1, Dead loads as per 875 Part 1, Live Loads as per 875 Part 2 , Wind loads as per IS 875 Part 3.In seismic analysis, importance factor relevant to multi-storey residential accommodation shall be applied. In wind load analysis risk factor k1 shall be as per probable design life of structures of 100 years, terrain factor k2 applicable for category 2, a topography factork3equal to 1.2 have to be considered. |
| 4 | (d) Structural design of foundation shall be based on detailed soil investigation report to be supplied to the consultant. The structural designer should do analysis of the soil investigation report completely and merely depending on recommendation part.(e) Structural design of RC structure shall be as per IS 456, IS 13920 and detailing shall be as per IS 456,SP 34 and IS 13920.(f)For detailing and design ‘moderate’ environmental exposure condition and 1.5 hr fire rating shall be considered.(2) Structural drawings shall consist of :-(a)General structural notes.(b) Typical structural details relevant to the particular structure.(c) Foundation plan(d) Framing plan at various beam levels(e) Schedule of columns, lintels, beams, slabs or alternatively detailed drawings of all column, beams, lintels and slabs.Details of RC bracket for crane, crane girder, RC cable duct and other misc details shown in architectural drawings.(3)Additional checks :-(a) Compatibility with architectural drawings(b) No overlapping of foundation, footings, beams.(c) Consistency of framing plans, sections and schedule of structural components.(d) No vague reference to codal provisions shall be allowed. Development length indicated in the drgs shall be specific ie. whether in compression or tension. The drgs shall be as per standard notations and practices and enable a diploma qualified civil engineer to produce complete bar bending schedule, shuttering schedule etc. |
