LANDSCAPE CONSTRUCTION

HOW TO DO LANDSCAPE CONSTRUCTION l METHOD STATEMENT FOR CONSTRUCTION OF LANDSCAPE WORKS.

PROCEDURE / METHOD TO BE EMPLOYED

SETTING OUT AND SURVEY

The concerned landscape area will be set out with reference to primary setting out points and cross-checked by MC’s/CONSL’s surveyor.  An existing level survey will be conducted by Contractor's surveyor to ascertain the extent of excavation/ filling of soil required.

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CLEANING AND CLEARING OF GRADE

Soon after the survey, cleaning and clearing the existing grade will start.  All contaminated and waste materials will be removed and disposed of off-site.  Before filling (if required) commences, the subgrade will be watered, levelled, compacted and tested.

EXCAVATION/ FILLING/ COMPACTION

EXCAVATION

Excavation will be carried out to a max. of 150mm beyond the actual profile of the structure length and width wise.  The depth of the excavation will be to the required profile of the structure.

Excavation in excess (if any) will be backfilled to the profile as mentioned above and will be backfilled with the excavated material in layers not exceeding 300mm. compacted with pedestrian rollers/ plate compactors to 95% max. dry density and tested prior to filling of the next layer.

FILLING AND COMPACTION

Filling where necessary will be carried out with the excavated material (as mentioned above) to the required profile of the structure.

Soil will be tipped over the fill area and spread by a BOBCAT/ FRONT WHEEL LOADER in layers not exceeding 300mm thickness.

This will be watered and compacted with pedestrian rollers/ plate compactors to 95% max. dry density.

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EDGE HEEL KERB

After compaction 1000g Polythene sheet is laid on the area where edge heel kerb is to be laid. Concrete grade 20/10 is laid over polythene sheet. Edge heel kerb is laid straight to meet with finished grade as per the approved shop drawings with sand cement mortar 3:1 over the concrete by hunching with mortar so as to have proper fixing.

DRY SET PAVING

Approved road base to the required thickness as per the approved shop drawing will be laid on compacted soil. The road base will be laid, by a BOBCAT / FRONT WHEEL LOADER or manually depend upon accessibility. The road base will be levelled, watered and compacted properly with roller/plate compactor to 95% max. dry density and tested prior to commencing the next activity. Compaction test will be done at 2 points for each villa selected by the consultant.

Sandbed of 30mm thick will be laid over the compacted surface of road base. Sand will be spread and levelled in bays of 2-4 sq.mtr. the area by Aluminium rectangular section piece of 1.5-meter length. Sand will be laid of thickness considering 1mm of compaction after fixing of paving tile is done with the rubber hammer to meet the finished grade.

Paving tile will be laid over the sand bed with butt joint between the paving tile. The paving tile will tamper with a rubber hammer so that it sets on the sand bed and matches the finished grade. The filling of joints between paving tile will be done by sweeping fine white sand. The paving area will be compacted so as to ensure that the sand settles in the joint properly.

The excess sand on the surface is then cleaned with a stiff broom. The area is sprayed with water and cleaned. The surface will not be used for 24 hrs after completed.

WET SET PAVING

After compaction soil testing at 2 points per villa will be carried out as selected by the consultant.

A layer of 1000g polythene sheet is laid. BRC Mesh A-142 is laid over polythene sheet with 50mm cover blocks to provide adequate cover to the reinforcement.

The concrete of 30/20 is laid to the required thickness per the approved shop drawings. Concrete is laid by a BOBCAT / FRONT LOADER or manually depending upon accessibility. The surface is levelled by means of Aluminium rectangular section 1.5 meter long piece. The surface is cured before laying the next finishes.

The RCC sub base is cleaned by removing all dirt, dust, debris and loose particles. 

Gress Porcellanto Tile is laid with approved adhesive to match the finished grade as per the shop drawing.

The joints will be grouted with approved material immediately.

Curing for the groups will be carried out as per manufacturers instructions.

The surface will not be used for 24 hours after grouting.

WADI STONE INSTALLATION

Wadi stone is set in a mortar (2:1 sand/cement) to required line & grade as specified over RCC sub-base as approved on the shop drawing for wet set paving hereinabove.

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MANPOWER REQUIREMENT

·       Chargehands

·       Carpenters

·       Masons

·       Skilled labours

·       Unskilled labours

MATERIAL REQUIREMENTS:

·       Cement

·       0-5mm washed Aggregate

·       Reinforcement steel as per design

·       Plywood/  polythene sheets

·       Tile Adhesive

·       Approved paving tiles.

·       Tile Grout

·       Readymix Concrete

·       Road base

EQUIPMENT REQUIREMENT

·       Bobcat / JCB

·       Masonry trowels and other hand tools.

·       Handheld grinders 4” and 7”

·       Paving tile cutter

·       Plate compactor