METHOD STATEMENT FOR IRRIGATION WORKS CHAPTER 2 l HOW TO DO IRRIGATION WORKS l IRRIGATION COMPANIES IN DUBAI
IDENTIFICATION OF EXISTING SERVICES
Upon receiving the underground services drawing from the main contractor, a drawing indicating the proposed trial pits for identifying the existing services will be prepared and submitted for approval. Upon receiving the approval, trial pits will be excavated by hand in order to avoid any sort of damage to existing systems. Also, scanning will be carried out to identify and locate underground live or dead power cables.
SETTING OUT AND MARKING OF MAIN LINE
After identifying all the underground services, the main line will be marked for excavation. Before starting the excavation, permission will be requested to dig from the consultant.
 |
| HARD & SOFT LANDSCAPE COMPANY DUBAI |
EXCAVATION FOR MAIN LINE
All excavation will be carried out by hand in order to avoid possible damage to any underground services which was not identified during the previous step. The excavated area will be protected with warning tapes. Excavation depth will be as per project specifications. Trenches will be made as narrow as wide enough to provide sufficient room for laying, joining and testing. On completion of the pits, an inspection will be carried out in presence of the consultant, prior to laying of mainline. Dewatering will be provided to remove any surface or groundwater entering the excavations. The trench will not be excavated more than 3 days production rate in front of pipe laying.
LAYING the MAIN LINE
Pipes for the main line will be procured after the written approval of the consultant. The purchased pipes will be stored properly in our store protecting from sunlight and other damages till ready for laying. Before laying in pits, pipes will be carefully inspected for any damages. Any defective pipes will be marked and removed from the site. A layer of sweet sand as per the project specification will be placed at the bottom of the pit to avoid any damage to the pipes if the existing formation is unsuitable for direct laying. Jointing will be carried out in accordance with manufacturer’s written instruction. Pipes and fittings are cut after they are suitably held, supported and protected. All ends will be cut square to the longitudinal axis of the pipe using a fine-toothed saw. Burrs at cut ends or shavings inside will be removed prior to installation in order to assure a smooth unobstructed flow. When using rubber ring joints, the approved lubricant will be used to lubricate the spigot and ring prior to insertion. When a pipeline is complete or when construction is delayed, the open ends will be sealed off until the work recommences. Solvent welding will be carried out by experienced fitters who fully understand the technique. Jointing will not be carried out in windy conditions.
