CFS (The strict Forced Centering System) is born from the cooperation between Ingeniería Cartográfica Garoa, with twenty years working surveying and precision geometrical control, and MEFABI, with an extended experience in designing and mechining pieces.
At the time of measuring, CFS allows the installation of portable benchmark elements which are not advisable to be installed permanently, since they could be damaged or defaced by acts of vandalism.
CFS system has two parts: the CFS adapter placed inside the case, which is permanently installed over the check point, and the CFS connector, which is removable and it can be jointly fit over any type of prism, GNSS antennas, etc. This CFS connector allows the accurate and unequivocal positioning of these instruments at the different monitoring campaings.
The result is a fixation without any kind of inner or external movement of the system, which means an unsurpassable accuracy in measuring. Thus, any slightest movement of the ground or an element will be shown in later measurings.
Thanks to the topographical surveying, we can detect slight movements in big structures or in grounds by regularly making topographical observations over the check points.
By installing the CFS adapter on those check points, we can place benchmarks elements instead of the former targets. This allows to automate the topographical observation process and get maximum accuracy results.
Tunnel convergence monitoring
The standard CFS models are provided with GMP104 prisms (short-medium range) and GPR112 (long range, either horizontal or vertical) from Leica, although they are so versatile they can be adapted to any kind of prism, target or any other measuring tool required by the customer.
All the components are made under the strictest quality procedures, as a system to ensure the control guidelines which ensure the reliability of all the produced components. MEFABI SL has the following quality certificates: ISO 9001 and UNE EN 9100.
In order to ensure the durability, all the CFS adapters and cases installed in the different check points are made of stainless steel. The other benchmarks elements are made of stainless steel and aluminium.
After being produced, the components undergo a thorough control to verify the precision of the accurate positioning of the different measuring instruments which can be fit over the CFS adapters.
CFS can be purchased individually, by code of reference or by ensembles. For initial installations, it is adivsable the qualified technicians from I.C. GAROA to carry out a site inspection, in order to estimate how many pieces are needed, and where to place them for subsequent measurings.
If you already have a CFS system, you can enter here the site of catalogue of references, manuals, etc.