Entwicklung eines gesteuerten Hausanschlussbohrgeraetes fuer Bohrungen von GOK zum Sammler inkl. der unterirdischen Herstellung eines wasserdichten Anschlusses auch im Grundwasser Schlussbericht

During the renovation of sewers by means of trenches methods it is not the custom to renovate the sewer connections of the houses affected - although these usually are in an equally bad condition. The reason for this probably is the very high cost - why reluctance on the part of the house-owners can be expected. It is the intention of this project to develop and test a device with which sewer connections can be replaced at low cost and which can also be used under difficult ground conditions as well as below ground-water level. Following well-established horizontal thrust-boring machines, a vertical boring machine was developed which works on the principle of trenches methods. It allows borings from ground level to the sewers in angles from 30 to 90 . A new bore head was designed to control direction, and gauging techniques required for this were optimized. With the help of a pneumatic in-hole-hammer it is possible to use the machine even in difficult ground conditions like rock or stony ground. The efficiency of the prototype could be proven using it in-situ. A lot of investigations and tests were carried out for its use below ground-water level. Still, the process evolved in the laboratory has to be optimized further before it can be used in practice. (orig.)Available from TIB Hannover: F98B1303+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman