Abstract：
The Lijia Station of the Chongqing Rail Transit Line 6 is a dual-island four-lane station, with its largest single-tube excavation area being 427 square meters and the net width of rock columns between the two tubes being 6.5～6.9m, so it is a typical large cross-section tunnel with parallel tunnels separated by a thin pillar. Construction practices showed that by utilizing reinforced and stabilized side slopes, big pipe-roofs, a reduction of the tunnel cross-section, up-down partition construction and installation of prestressed anchor bolts in the middle rock column, along with monitoring and taking measurements, subsidence and deformation were effectively controlled, ensuring the safety of the shallow-buried section of the Lijia Station.
XU Qiang
.Construction Techniques for the Lijia Station Characterized by a Large Cross-Section and Parallel Tunnels Separated by a Thin Pillar[J] MODERN TUNNELLING TECHNOLOGY, 2011,V48(6): 146-150
2011, Vol. 48 