METHODOLOGY FOR TURFING OF SLOPES, SHOULDERS AND MEDIAN OF EMBANKMENT

 

TURFING  OF  SLOPES,  SHOULDERS  AND MEDIAN  OF  EMBANKMENT 

    Turfing is done on side slopes and on the shoulders of the roads to prevent erosion of soil. It also  gives a pleasing appearance of the road side. Turfing is generally done in the rainy season. 

 

Scope of Work :

            Furnishing & Laying of live sods as to form grass on embankment slopes, verges and median as per the Technical Specifications 

Materials : 

            The materials proposed to be used are Local doob grass, Lemon or Lepia grass, Local sarpat grass, Long leaved carpet grass and /or as approved by the Engineer. All the materials used shall be devoid of any undesirable materials especially weeds etc.

 LAYING PROCESS:

1.  The area to be turfed shall have been previously constructed to the required slope  / cross-section or else it shall be prepared to 2: 1 slope and checked by template for continuity & exactness of slope.

  2.   The soil on the area to be turfed shall be loosed upto a depth of 25 mm and                 made free of all undesirable foreign material.

3.  Where required fertilizer / manure shall be spread at a uniform rate by discing or any other method as approved by the Engineer.

4.  The prepared bed shall be moistened to the loosened depth, if not already sufficiently moist.

5.   The sods shall be cut in strips of not less than 250mm x 300mm in size.  

6.   The sods of the specified grass shall be placed thereon, within 24 Hrs. of cutting.

7.  Every strip shall be tamped lightly with suitable wooden or metal tempers so as to eliminate air pockets and to press it into the underlaying soil.

8.   On side slopes steeper than 2 (H) to 1 (V), the laying of sods shall be started from bottom upwards.

9.   After the sods have been laid in position, the surface shall be cleaned of loose sod, excess soil and other foreign materials.

10.  Top dressing shall be done by scattering a thin layer of top soil and sprinkling the surface with water.

11. Proper watering and maintenance of the surface shall be done to ensure proper and uniform growth of sods for at least four weeks.

 Enviromental and Safety Precautions to be taken:

1.   Warning Signs at suitable locations shall be erected to ensure that the turfed surface is not accidentally run over by motor vehicles.

2.  Barriers shall be erected to protect the turfed surface from stray cattle and any undesirable human intervention. 

3.     Watering of the surface shall be so done as to avoid erosion of the soil.

4.     It shall be ensured that the sodded areas are not damaged by the wheels of water trucks while watering. 

5.   It shall be ensured that there occurs no harm to the sodded surface by any of the construction activities going on nearby.

CHECK LIST FOR TURFING 

S.No.	Description	YES	NO	NA
1	Is the slopes to be turfed have been completed to the lines, levels & sloped
2	Is the topsoil has been laid
3	Is the topsoil has been loosened and made free from undesirable matter
4	Is the turfing material meets the specification and requirement
5	Is turfing material has been cut not earlier than 24hours