Technical Specification for Excavation, Murrum Filling & Back Filling of Soil
Excavation for foundation up to 1.50 mt depth including sorting out and stacking of useful materials and disposing the excavated stuff for all lead and lift for loose or soft soil. All sorts of soil Any soil which generally require close application of picks or jumpers or scarifies to loosen it stiff clay, gravel and stone etc. fall under this category.
1.0. General
- Any soil which generally yields to the application of pickaxes and shovels, phawaras rakes or any such ordinary excavating implement or organic soil, gravel silt, sand turf loam, clay, peat etc. fail under this category.
2.0. Clearing the site
- The site on which the structure is to be built shall be cleared, and all obstructions loose stone, materials and rubbish of all kind bush wood and trees shall be removal as directed The materials so obtained shall be property of the Government and shall be conveyed und stacked as directed with all lead. The roots of the trees coming in the sides shall be cut and coated with a hot asphalt
- The rate of side clearance is deemed to be included in the rate of earth work for which no extra will be paid.
3.0. Setting out
- Setting out After clearing the site the center lines will be given by the Engineer-in-charge. The contractor shall assume full responsibility for alignment, elevation and dimension of each and all 'parts of the work. Contractor shall supply labours materials, etc. required for setting out the reference marks and bench 'marks and shall maintain them as long as required and directed.
4.0. Excavation
- The excavation in foundation shall be carried out in true line and level and shall have the width and depth as shown in the drawings or as directed. The contractor shall do the necessary shoring and shutting or providing necessary slopes to a safe angle, at his own cost. The payment for such precautionary measures shall be paid separately it not specified. The bottom of the excavated area shall be leveled both longitudinally and transversely as directed by removing and watering as required no. earth filling will be allowed for brining it to level, if by mistake or any excavation is made deeper or wider than, that shown on the plan or directed. The extra depth or width shall be made up with concrete of same proportion as specified for the foundation concrete at the cost of the contractor. The excavation upto 1.5 mt. depth shall be measured under this item.
5.0. Disposal of the excavated stuff
- The excavated stuff of the selected type shall be used in filling the trenches and plinth or leveling the ground in layers including ramming and watering etc.
- The balance of the excavated quantity shall be removed by the contractor from the site of work to a place as directed with lead up to all lead and lift.
6.0. Mode of measurements & payment
- The measurement of excavation in trenches for foundation shall be made according to the sections of trenches shown on the drawing or as per sections given by the Engineer-in-charge. No payment shall be made for surplus excavation made in excess of above requirements or due to stopping and sloping back as found necessary on account of conditions of soil and requirements of safety.
- The rate shall be for a unit of one cubic meter.
Item No. 2: Filling available excavated earth (excluding rock) in trenches plinth side of foundation etc. in layer not exceeding 20 cm in depth consolidation each deposited layer by ramming and watering etc. complete.
1.0 WORKMANSHIP
- The earth to
- The plinth shall
- The finished level of filling shall
- In
2.0. Mode of Measurements & Payment
- The payment shall be made for filling in plinth and trenches. No deduction shall be made for shrinkage or voids, if consolidated as instructed above.
- The rate shall be for a unit of one cubic meter.
Filling in foundation and plinth with murrum or selected soil in layers of 20 cm thickness including watering, ramming and consolidation etc. complete.
1.0 MATERIALS
- Murrum or selected soil shall be clean, of good binding quality and of approved quality obtained from approved pots / quarries of disintegrated rocks which contain silicon's material and natural mixture of clay of clarions origin. The size of murrum or selected soil shall not be more than 20 cm. The P.I. value of selected soil used shall not be more than 6.0.
2.0 WORKMANSHIP
- The murrum or selected soil to be used for filling shall be free from salts, organic or other foreign matter all colds of murrum or selected soil shall be broken.
- As soon as the work in foundation has been completed and measured the site of foundation shall be cleared of all debris brick bats mortar dropping etc. and filled with murrum or selected soil in layers not exceeding 20 cms. Each layer shall be adequately watered, rammed and consolidated before the succeeding layer is laid. The murrum shall be rammed with iron rammers where feasible and with the but ends of crow bars. Where rammer cannot be used.
- The plinth shall be similarly tilled with murrum or selected soil in layers not exceeding 20 cms adequately watered and consolidated by ramming with iron or wooden rammers. When filling reaches finished level the surface shall be flooded with water for at least 24 hours and allowed to dry and then rammed and consolidated.
- The finished level of filling shall be kept to shape intended to be given to floor.
- In case of large heavy duty flooring like factory flooring, the consolidation may be done by power rollers, where so specified. The extent of consolidation required shall also be as specified.
3.0. MODE OF MEASUREMENTS & PAYMENT
- The payment shall be made for filling in plinth and foundation no deduction shall be made for shrinkage or voids, if consolidated as instructed above.
- The rate includes cost of collecting and carting murrum / or selected earth of approved quality with all lead and labour required for filling in trenches and plinth.
- The rate shall be for a unit of one Cum. meter.
Tags:
Civil Engineering