Ren Peng Chen scite author profile

a b s t r a c tThe inevitable influence of large excavation in soft soils on nearby tunnels is of great concern in practice. In this paper, the influence of a nearby large excavation on existing metro tunnels of the Ningbo Metro Line 1 in sensitive soft soils is investigated and presented. Considerable displacement in the left tunnel closer to the excavation induced by the nearby excavation was revealed by field monitoring. Visible cracks and leakages were observed in left tunnel linings. Three dimensional numerical simulations are conducted to investigate the responses of the ground and left tunnel due to the adjacent excavation. The development of bending moment and displacement of the left tunnel during different construction stages of the nearby excavation is obtained. Then the interaction mechanism between the nearby excavation, surrounding soils and existing twin tunnels is investigated, which is of significance to the interpretation of the influence of the nearby excavation on the existing twin tunnels. Several protective measures for alleviating the influence of adjacent excavation on left tunnel are studied, including divided excavation, soil improvement and a cut-off wall. It is found that the left tunnel is influenced to varying degrees during different construction stages and the time effect is distinct for this large excavation in soft soils, which would be suggestive to engineers to pay more attention to the protection of adjacent tunnel during the crucial construction stages. The bending moment and displacement of the left tunnel is strongly related to the unloading effects and displacement of surrounding soils, which can be alleviated by means of proper improvement of excavation sequence. Comparatively, longitudinally divided excavation is more effective in protecting the left tunnel than soil improvement or a cut-off wall. This study is of certain reference value for protecting metro tunnels adjacent excavation in soft soils.

show abstract

Permanent Deformation of Track-Bed Materials at Various Inclusion Contents under Large Number of Loading Cycles

Wang

Cui

Lamas-Lopez

et al. 2018

J. Geotech. Geoenviron. Eng.

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

334 Leonard St

Brooklyn, NY 11211

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Ren Peng Chen

Face stability analysis of shallow shield tunnels in dry sandy ground using the discrete element method

Prediction of maximum surface settlement caused by earth pressure balance (EPB) shield tunneling with ANN methods

Tensile force of geogrids embedded in pile-supported reinforced embankment: A full-scale experimental study

Experimental study on face instability of shield tunnel in sand

One-dimensional nonlinear consolidation of multi-layered soil by differential quadrature method

Ground movement induced by parallel EPB tunnels in silty soils

Investigation of response of metro tunnels due to adjacent large excavation and protective measures in soft soils

Permanent Deformation of Track-Bed Materials at Various Inclusion Contents under Large Number of Loading Cycles

Contact Info

Product

Resources

About