Geodetic measurements in the construction of microtunnels

The main goal of this thesis is to present the technology of building micro tunnels (microtunneling). The biggest emphasis is on describing practical geodetic surveys at building micro tunnels. Described in details are the processes of planning, putting up and measuring the geodetic network, as well as the procedures of geodetic control surveys before, during and after drilling. The accuracy of geodetic control surveys in the phase of drilling is assesed. The main focus of this thesis was to find out how accurate can we determine horizontal position of detailed points, depending on chosen work method, instruments and position of given points. The findings of this thesis suggest that with the correct layout of drilling points, specific measuring equipment and measuring method, the client's expectations about drilling accuracy can be met; namely the drilling exit point should be accurate to 500 mm compared to the planned exit point