Research of Construction Technology for New-building Tunnels Beneath Existing Expressways
ZHANG Zhen1, LIAO ZHI-peng2, FANG Hai-bo3
1.Shaanxi Provincial Transport Planning Design and Research Institute, 710065, Xi'an, China; 2.General Contracting Branch Co.,
of CCCC First Highway Engineering Co., Ltd., 100024, Beijing, China; 3.School of Civil and Architecture Engineering,
Xi'an Technological University, 710021, Xi'an, China
Abstract：
Combing with the shallow subsurface-excavated construction scheme of a highway tunnel, in this paper, numerical calculation is performed for construction process of existing highway above the shallow tunnel with large cross-section in soft soil area, and the surrounding rock and stress state is analyzed to evaluate the safety and reality of the construction scheme. The calculation result indicates that the two-side wall pilot construction method has a good effect in controlling the surrounding rock deformation, however, large axial force and bending moment are generated in arch spring and corner when removing the temporary support. Therefore, monitoring and measurement should be strengthened and necessary reinforcement measures should be taken.
ZHANG Zhen1,LIAO ZHI-peng2,FANG Hai-bo3. Research of Construction Technology for New-building Tunnels Beneath Existing Expressways[J]. Architecture Technology, 2017, 48(9): 944-.
