Abstract:

The shieldreceiving section of the running tunnels of Line 7 and Line 9 of Shenzhen Metro crosses closely underneath existing Line 1 of Shenzhen Metro. The consolidation of the shieldreceiving section should not only ensure the stability of the ground during shield arriving, but also should ensure that the settlement of the existing Metro line induced during ground consolidation and shield arriving does not exceed the limit value. In the paper, ground consolidation technologies, including staticpressure circulating grouting technology, application of new grouting materials with good diffusion property and controllable gel time and automatic monitoring technology, are studied. The mentioned technologies have been used in the project and good effect has been achieved.

Key words: Shenzhen Metro, shieldbored tunnel, shield receiving section, existing Metro line, grouting consolidation, structural deformation, control technology