Hints for Landfill Operators for Their Choice of Plant

The Use and Selection of Dump Site Plant

Where wastes are tipped on top of each bay in the dump cells the plant is used to bump the refuse into position over the tip face after discharge from the automobile. A skilful operator whilst doing this can, by keeping his blade barely above the intended level, roll the bulk of the refuse in front of him and leave the dust and cinder as a layer behind him.

Choice of Machine

Tired wheeled automobiles possess the advantage of flexibility, in addition to their comparatively lower cost compared to other kinds of traction, in that they can be used 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. Point loading also gives this kind of plant item good compressibility. The drawbacks are a limitation on capacity, less efficient 1st settlement and levelling, and the puncture and physical damage problem, although this can be partially solved by trying solid and filled tires.

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

The use of shovels, as against blades, on tractor equipment has become almost universal due to their capacity to dig material and to be used for loading. Though flexible these machines are not frequently used for day to day rubbish heap operations, but are very useful for development work on any landfill.

The steel wheeled car ( compactor ) is a machine in particular designed for rubbish heap use and ruggedized designs more fitted to the consistent dust and short track stressing movements so common for compaction. These are now commonplace and this the relative newcomer to the range of machinery available for controlled rubbish heap operations, has become a core plant need for all rubbish heap operators.

The principal advan­tage is in high 1st compression, which improves stability in the recently created part of the tip, minimizes initial volume and consequently decreases the need for primary cover material as tipping proceeds.

A well compacted site also settles less overall and the settlement is more even, with reduced low spots appearing years later, which otherwise after restoration may lead to standing water and fears about water ingress thru the capping materials.

This in turn improves the amount of tipped material to cover material across the site.

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