| 摘要 |
The tunnel of ductile double tube is a tunnel to be built in weak soil (1), constituted by two concentric tubes, acting together: an exterior tube (3) formed by precast segments (10), which are mounted by a tunnel boring machine, and an interior tube (4), which is cast inside the exterior tube (3). The interior tube (4) is provided with longitudinal reinforcements (7) and transversal reinforcements (8), both confined by confining reinforcements (9). The tunnel is provided with supports, regularly spaced, constituted by groups of piles (6) horizontally flexible, which are anchored upon in concrete blocks (5), evolving de exterior tube (3), and in the stiff soil below (2). |
