MODERNIZATION OF UNDERGROUND PIPES IN TOWNS IN POLAND

Renovation of the existing, worn-our network infrastructure in Polish towns is one of the basic elements necessary to make those towns confo rm to European, standards. This problem has gained significance, espec ially in light of Poland's efforts to join the European Union. Rehabil itation of pipes is necessary as a result of the poor technical condit ion, of pipes, their inefficiency, or the location, of the pipes (e.g. , in, a location that interferes with planned development of undergrou nd space in towns). Trenchless technologies for renovation of undergro und network infrastructure are discussed, from technologies used for s ingle pipes to multiconduit tunnels as a method for achieving complex modernization of infrastructure. Economic, technical, and legislative problems connected with the use of these solutions are also presented.