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RISAnalytical Solution of Terzaghi’s Ground Arch Model for Loads on Circular Tunnels
Publisher: American Society of Civil Engineers
Abstract: To date, the important problem of Terzaghi’s ground arch model in 1946 has not been solved for loads on circular tunnels. This study comprehensively presented a general analytical solution of Terzaghi’s ground arch model ...
Laboratory Model Test of EPB Shield Tunneling in a Cobble-Rich Soil
Publisher: ASCE
Abstract: Model tests and field measurements were carried out to study the mechanical behavior of cobble-rich soil in response to shield tunneling. In particular, an experimental investigation was carried out using a laboratory-scale ...
Face Stability Analysis of EPB Shield Tunnels in Dry Granular Soils Considering Nonuniform Chamber Pressure and a Dynamic Excavation Process
Publisher: ASCE
Abstract: The support pressure at the tunnel face of earth pressure balance (EPB) shield machines is usually assumed to be uniform from the crown to the invert, which is a notable simplification of reality. In this study, the effects ...
In Situ Stress Field along the Axis of Deeply Buried Tunnel in Southwest China Employing the Segmented Single-Borehole Inversion Method
Publisher: ASCE
Abstract: Investigating the in situ stress field is one of the primary tasks of the tunnel disaster prevention and design stage in a high geostress environment with a strength–stress ratio lower than four. Due to the limited measured ...
Grain-Size Distribution Effects on the Mechanical Behavior of Granular Soil in Response to EPBS Tunneling
Publisher: ASCE
Abstract: A set of model tests using a miniature Earth Pressure Balanced Shield (EPBS) machine are carried out to examine the effects of grain-size distribution on the mechanical behavior of granular soil in response to EPBS tunneling. ...
A Solution Method for Tunnel Supporting Structure System Incorporating the Active Control of Surrounding Rock Deformation
Publisher: ASCE
Abstract: With the continuous deepening that humans exploit underground space, tunnel engineering passing through sensitive strata, e.g., ultralarge buried depth, high water pressure, and active faults, has become more frequent. ...
Construction Schemes for Shallow and Asymmetrically Loaded Tunnels Crossing Below a Bridge
Publisher: ASCE
Abstract: With the development of infrastructure, new tunnel crossings below existing bridges are becoming increasingly common. This paper presents a case history of a shallow, double-line tunnel crossing below a bridge on a hillslope ...
Longitudinal Seismic Response of a Shield Tunnel Considering Longitudinal Bolt Prestress under Transverse Excitation
Publisher: ASCE
Abstract: A shield tunnel is an assembled structure that is composed of segments and connecting bolts, and its longitudinal seismic response needs to be investigated. Bolt prestress is a common measure for shield tunnels, and ...
Laboratory Test of EPB Shield Tunneling in Mixed-Face Conditions
Publisher: ASCE
Abstract: Field measurements and laboratory tests were carried out to study the mechanical behaviors of soil in response to earth pressure balance (EPB) shield tunneling in mixed-face conditions, i.e., layers of granite and sand. ...