Digging trench with mini excavator is a common sight in engineer construction. However, it requires a level of skills to maximize the productivity, efficiency and safety in the trenching process. Proper setup in advance is very necessary for digging a good trench, otherwise, it will take more time to make up for the trial and errors.
First, take time to plan and design the layout of the trench, which will better serve your purpose and avoid confusion in digging process. The route you choose should not damage any valuable plants or infrastructures. Trees and shrubs may suffer injury or die if their roots are damaged in excavation. Infrastructures like driveways may collapse if they are undermined. The soil on the trenching site you choose should not be too hard or too loose, the hard soil will damage the mini excavator’s bucket teeth while the loose and wet soil will not only make digging a straight and deep ditch difficult but also may cause cave-in, which is very dangerous. Keep clear of the underground gas, electric, water and communications pipes and cables to avoid causing any injuries to people or damages to the machine.
Second, dig the trench. A reference point is a strong basis for digging a straight line. Align the front and back of the mini excavator to the line you are referencing so that the track is straight and ensure the excavator remains level all the time. Cast the removed soil as far from the excavation as possible, so that it will not encumber the installing work of the utilities and can prevent the removed material from creating an overburden on the banks of the trench. The trench should be dug gradually by making perfect and accurate work in each section, which will ensure the finished trench does not require remedial work to make it usable. When the trench is completed, do some grading work to make it available for installing necessary materials.
Third, an emphasis on safety is essential and more attentions should be paid to the operating precautions during the trench digging. The biggest potential hazard of working over the edge of a hole is the risk of cave-in, so make sure the machine is placed far enough back to support its weight. Pay close attention to the travelling direction and keep awareness of people and objects around the machine all the time.