Promoting the coupling structure of steel shell element, and the application mannered null steel shell element

摘要

PPROBLEM TO BE SOLVED: To provide a joint structure of a steel shell element capable of being simplified by easily and securely connecting the stress members of the steel shell element to each other for direct transmission. PSOLUTION: In this joint structure for propelling a male joint part 18 formed at one end part of the steel shell element 18 and a female joint part 20 formed at the other end part thereof adjacent to each other while fitting them to each other when the steel shell element 16 is propelled to construct a plurality of tunnels at adjacent positions, the male joint part comprises a projected part 32 covering the outer surfaces of the adjacent stress members 28 and 34 of the steel shell element with a step obtained by adding an amount equivalent to an installation clearance to the thickness of the stress member 28 of the steel shell element. The female joint part comprises a covering part 38 facing the end faces 28a and 34a of the stress member to each other while leaving a clearance 36 from the end face 28a of the stress member on the female joint part side and covering the projected part 32 of the male joint part. After the steel shell element is propelled for construction, the adjacent end faces of the stress member are welded to each other while leaving the clearance so as to connect them to each other. PCOPYRIGHT: (C)2006,JPO&NCIPI