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Effect of surcharge loading on horseshoe-shaped tunnels excavated in saturated soft rocks

Journal of Rock Mechanics and Geotechnical Engineering 2020年第6期12卷 1339-1346页

作者： Dianchun Du Daniel Dias Ngocanh Do School of Civil Engineering Southeast UniversityNanjingChina School of Automotive and Transportation Engineering Hefei University of TechnologyHefeiChina Antea Group AntonyFrance Department of Underground and Mining Construction Faculty of Civil EngineeringHanoi University of Mining and GeologyHanoiViet Nam

Underground facilities are usually constructed under existing buildings,or buildings are constructed over existing underground *** is then imperative to account for the current overburden loads and future surface loadings in the design of *** addition,tunnels are often constructed beneath the groundwater level,such as cross-river ***,it is also important to consider the water pressure impact on the tunnel lining *** excavated by a conventional tunnelling method are considered in this *** hyperstatic reaction method(HRM)is adopted in this study to investigate the effect of surcharge loading on a horseshoe-shaped tunnel behaviour excavated in saturated soft *** results obtained from the HRM and numerical modelling are in good *** studies were then performed to show the effects of the water pressure,surcharge loading value and its width,and groundwater level on the behaviour of the horseshoe-shaped tunnel lining,in terms of internal forces and *** displays that the bending moment,normal forces and radial displacements are more sensitive to the water pressure,surcharge loading and groundwater level.

关键词： Surcharge loading horseshoe-shaped tunnel Hyperstatic reaction method(HRM) Saturated soft rocks

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