A trench can be defined as a form of a depression found on the ground and that is narrower than its length and deeper than its width. In geology, trenches can be formed as a result of the movement of tectonic plates or river erosion. Trenches are used to serve the purpose of installing ground infrastructure or utilities such as water mains, gas mains and telephone lines. Trenches have always been used as a defensive mechanism in military too. The “trench method” in archaeology is used for digging into strata (sentimental material) or to search and excavate the ruins and fossils. This article focuses on some of the improved trenching methods.
The preparation process involves collecting information about the road and the type of soil found on the road. Apart from the type of soil and the nature of the road, the soil condition is also considered. This helps in the selection of the methods to be applied and the types of the materials to be used when carrying out the construction, you can find a lot of trencher for sale in town but be sure to look for the kind that suites your needs.
Relevant back lifting materials have to be selected. The staff in the field need be trained on characterization of the soil. They also have to be trained on the properties and how to apply the available materials.
The work has to be carried out in a way that can help minimize the disturbance to the surrounding pavement and sub-grade. The excavation equipments should be of appropriate size.
It is only after the removal of the loose and disturbed materials that backfilling using materials that are compactable are completed. A composition of the backfilling materials that are in layers can be incorporated in the work while the materials of low quality are placed at the bottom. The backfilling materials that are used should be put in lifts not exceeding 300 mm.
To avoid under-compaction of edges and over compaction in the center, the backfilling materials have to be put along the edges of the trench but not in the middle. Uniform and good compaction depends on the size and the type of the equipment used in the compaction.
Vibration or compaction is not required when backfilling using foamed or low-strength concrete materials. To avoid floatation around the pipes, the materials have to be put in lift. Bracing for pipes can also be applied.
It is possible to complete the one-step trench reinstatement under favorable moisture, weather and traffic conditions. This method is cheaper than the staged reinstatements; even though it is affected by long term settlement. Staged reinstatements are applicable where the actual repairs are done in adverse conditions.