Method Statement -Rubble Pitching

1.0 OBJECTIVE

This Work Method Statement is to outline the sequence of activities, method and resources needed for the operation of rubble pitching’s construction.

 

2.0 SCOPE

This method statement shall be used for failure slope protection, abutment and river protection for the (your project name). Details of the procedures contained herein may be modified based upon actual ground condition and site requirements.

 

3.0 REFERENCES

Ø  Construction Drawings

Ø  Approved Shop Drawings

Ø  Project Specifications

 

4.0 RESPONSIBILITIES

Ø  Safety Officer/Supervisor

Ø  Site Manager

Ø  Project Engineer

Ø  Site Supervisor

 

5.0 MATERIALS

Ø  Stone

Ø  75mm Dia. UPVC Pipe

Ø  Geotextile

Ø  Graded Granular

Ø  Ordinary Portland Cement

Ø  Fine Aggregate

 

6.0 HANDLING AND STORAGE OF MATERIALS

Handling             - Transport of materials shall be carried out by lorry or other suitable machinery.

Storage               - Covered and raised above floor level.

 

7.0 PLANT, MACHINERY AND EQUIPMENT

Ø  Concrete Mixer

Ø  Hand Tools

 

 

8.0 PREPARATORY WORKS

         i.            Obtained relevant approved construction drawing from consultant/consultant’s representative.

        ii.            Set out the location, center lines and limits of work.

      iii.            Set out the toe peg and finish level for the work.

      iv.            Set temporary earth drain and outlet structure before work starts (if required).

 

9.0 WORK METHODOLOGY

         i.            Moisten the work surface with clean water a little in advance of construction.

       ii.            Lay the cement mortar about 50mm thickness.

      iii.            Construction of rubble pitching shall commence at the lowest part of each structure or section of a structure and continue progressively upward.

      iv.            The pitching shall be laid in horizontal courses with headers at intervals or in random fashion depending on the stone available.

       v.            Place the stones firmly set by hand into the mortar, densely packed against adjacent stones and built up to form a stone structure of uniform thickness as shown in the drawing.

      vi.            For abutment and river protection at bridge area, one layer of geotextile type A will be laid as per drawing.

    vii.            To fill the mortar with hand-placed space between the stones from bottom to top.

   viii.            Clean the surface to expose the individual stone faces.

      ix.            To provide the weep holes as shown in the drawing.

       x.            To finish the pitching with a horizontal course at the level shown on the drawing.

 

10.0 TRAFFIC MANAGEMENT AND MONITORING

10.1 Maintenance of existing roads, footpaths and service drains, etc.

The construction team shall maintain all existing site excess, roads, footpath, service drain, etc. and reinstate any damage caused by any reason whatsoever during the progress of the works.

It will be the Safety Officer/Supervisor’s responsibility to ensure that ingress and egress to the site are kept free from obstruction brought about by the work on this site and in no way shall cause hindrance to traffic or ancillary works either by his own vehicles or by his work people, material, etc.

 

11.0 SAFETY PROGRAMME

11.1    Temporary Works and Public Safety

The Safety Officer/Supervisor shall be responsible for submission of plans and drawings to the relevant Authorities for the construction of all the necessary temporary drains and desilting pits, safety nettings for the works.

The Safety Officer/Supervisor shall provide adequate signboards at all strategic positions warning the public to keep away from the work site and erect temporary fencing and barriers where necessary around the site to prevent unauthorized trespassing during works.

 

12.0 ENVIRONMENTAL PROGRAMME

All works should be carried out in accordance with best practice environmental management as defined in the EMP.

12.1    Site Access.

The access as well as the portion of public road and walkway connected with it shall be kept clean and safe at all times.

12.2    Temporary Work.

Existing drain shall be identified by contractor together with the flow of drain until discharge point in order to make use of it during repairing work. Silt trap shall be provided before any discharge of surface water within site towards existing drain. This work should be completed prior to the commencement of any activities.

Temporary earth drain shall be constructed along clearing area to retain the surface water from dismissal directly towards existing drain. Desilting work shall be carried out regularly and the existing drain will be maintained during work.

As the slope area will not be disturbed, the existing turf or grown grass shall be remain and only manually cut the grown trees without uprooting it. Plastic sheet /canvas will be provided on site on standby basis in order to be use as slope protection if necessary.

Any effluent discharges from the site must comply with the Third Schedule of the Environmental Quality (Sewage and Industrial Effluents) Regulation 1979.

12.3       Waste Management.

Any construction wastes, solid wastes and domestic wastes other than schedule wastes must be disposed-off at the approved disposal site. On site compositing for biodegradable waste is allowable but land filling and open burning activities for the solid waste are strictly prohibited.