CONSTRUCTION METHOD OF EXTREMELY LARGE RECTANGULAR SHIELD TUNNEL

摘要

PURPOSE: To construct a rectangular road tunnel with an extremely large sectional area by a non-opened shield tunneling method in a short period. ;CONSTITUTION: A rectangular tunnel with an extremely large section is divided into horizontal slab parts 1', 2', 3' and respective slab parts are constructed in advance by respective rectangular shields 10, 11, 12 to construct horizontal slabs 1, 2, 3, The tunnel is divided into vertical main body parts 4', 5', 6', 7' connecting upper and lower horizontal slabs and respective vertical main body parts are constructed by rectangular shields 13, 14, 15, 16 to construct respective vertical main bodies 4, 5, 6, 7 and make a unified structure with respective horizontal slabs 1, 2, 3. In this way, an extremely large sectional tunnels 8, 9 can be rationally constructed in a low cost and in a short period by a non- open shield tunneling method.;COPYRIGHT: (C)1995,JPO