Hints for Landfill Operators for Their Choice of Plant

Where garbage is tipped on top of each cell in the rubbish dump cells the Compaction Plant with knife-like wheels is used to spread the refuse into position over the tip face after discharge from the vehicle. A skilful operator while doing this can, by keeping his blade slightly above the intended level, roll the majority of the refuse in front of him and leave the dust and cinder as a layer behind him.



This method means the the refuse is compressed by the weight of the bulldozer as it advances and also by the weight of automobiles delivering refuse to the tip face. Wherever wastes are tipped at the foot of the bay the operation of the tractor in forming the sub-layers is a rising motion and it is fairly common practice to operate the tractor steadily as it forms the sub-layers, thus producing larger physical compression (compaction), even though at the cost of increased wear and tear on the piece of plant concerned.

Choosing the Compactor Machine

Tired wheeled vehicles possess the advantage of flexibility, in addition to their comparatively lower cost compared with other forms of traction, in that they can be employed to trim and cover the tip face; to dig and load cover material from distant parts of the site with little time lost in travelling ; and to travel on the public road to other tips in cases of emergency, or to local depots for garaging and potentially alternative work. All these features along with comparatively lower cost make conventional rubber tired wheeled automobiles good standby machines in virtually any organization. The drawbacks are a limitation on capacity, less efficient 1st settlement and levelling, and the puncture and physical damage problem, though this will be partially solved by employing solid and filled tires.

The tracked machine is more dear to purchase and maintain than the tyred wheel machine but can work under conditions which would be difficult for a wheeled machine. Although compressibility is not so good, improved levelling can be done, particularly when a blade is fitted, and the same machine can haul a scraper for soil stripping, stockpiling and replacement.

The use of trowels, versus blades, on tractor equipment has become just about universal due to their capacity to dig material and to be used for loading. A further development is the 'four in one' spade ( ordinarily called by its original UK makers name of JCB ) which, in addition to digging and loading, may also be used as a grab to pick up material. Although versatile these machines are not regularly used for daily rubbish heap operations, but are extremely helpful for development work on any landfill.

The 'dozer blade gives a better finish to the rubbish heap surface but the use of a bucket is more versatile.

The steel wheeled car ( compactor ) is a machine specifically designed for rubbish heap use and ruggedized designs more suitable to the consistent dust and short track stressing movements so common for compaction. These are now commonplace and this the comparative newcomer to the range of machinery available for controlled landfill operations, has changed into a core plant duty for all rubbish heap operators.

In provisions of capital expenditure a compactor is significantly more expensive than its opposite numbers but the extra cost is (weighed|weighted|assessed} versus the more dense compaction densities that these machines achieve above and outside the density achieved with plant types. Particularly on high quantity sites when time is short for repeating many multiple passes to enhance compaction, it has edges over other mobile plant now in use.

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