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What is Microtrenching?


Microtrenching is a low-cost alternative to conventional civil engineering. With the extension and modernization of communication networks trenches are milled into streets and pavements to then pass fibre optic cable. This trench does only have the required width and height that the material to be laid requires. A large-scale opening of the asphalt, that would include a tremendous expenditure of time and costs and that would be difficult especially in urban areas, can be omitted with this version.

By this way of Microtrenching the costs for passing cables can be reduced by up to 75 %. Furthermore streets needed to be closed less that would otherwise be blocked over a long period of time. The difficulty of subsidence of filler material at large-scale opened asphalt can be avoided with this method. A trench of a width of max. 30 mm and a depth of max. 300 mm is cut into the street. Afterwards are passed empty tubes in which optical fibres are blown.





1. No ripped cutting edges by use of diamond saw blades

In contrast to trench cutting, where the surface is grinded open with hard metal chisel wheels, diamond saw blades are applicated with the joint cutter. This is an advantage as the hard metal chisel wheel procedure often causes ripped cutting edges. By the grinding process of diamond saw blades this effect is significantly reduced.


2. Trench widths can be adjusted individually

 At the CEDIMA-Microtrenching-version several saw blades are placed next to each other until the desired trench width is achieved. Depending on the application the width can thus vary and there is the chance to pass different kind of cables at the same time.




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