TUNNEL LINING METHOD

PURPOSE:To enable reliable execution and speedy and appropriate maintenance in various kinds of works when a lining body of a tunnel is constructed and to make it possible to execute safely, surely and efficiently earth withdrawal of a surplus bedrock and to provide various kinds of equipment, piping, etc., for public facilities after the lining body is constructed. CONSTITUTION:An excavator 2 is constituted of lining sections 8 and enlargement sections 10. Four enlargement sections 10 are formed. The excavator excavates underground, and an internal bedrock 20 and an external bedrock 22 are formed. With the excavation, segments 24 are assembled in the enlargement sections 10, and working shafts 30 in which workers can work are formed. By using the working shafts 30, lining bodies are formed in the lining bodies 8 by lining members (such as concrete), and built-up work of the working shaft of the following continuous enlargement section is executed. In addition, the working shaft 30 is used for the cleaning of the lining section, sludge withdrawal, power water supply, earth withdrawal of the internal bedrock, provision of various equipments and pipe lines, etc.