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RISThree-Dimensional Hoek-Brown Strength Criterion for Rocks
Publisher: American Society of Civil Engineers
Abstract: A great number of rock strength criteria have been proposed over the past decades. Of these different strength criteria, the Hoek-Brown strength criterion has been used most widely, because: (1) it has been developed ...
Modeling and Visualization of Underground Structures
Publisher: American Society of Civil Engineers
Abstract: Based on the solid modeling, transformation operation and Boolean operation techniques widely available in computer-aided design and drafting system, first, this paper proposed a general modeling method for dynamic underground ...
Analysis of Calculation Models of Anti-upward Moving for Shield Tunnel and Their Adaptability
Publisher: American Society of Civil Engineers
Abstract: The upward-moving of shield tunnel during construction has brought about great concern. The reasons of shield tunnel upward-moving were analyzed and classified into six aspects, including buoyancy, axial eccentric force, ...
Mechanical Behaviors of Sandy Sediments Bearing Pore-Filling Methane Hydrate under Different Intermediate Principal Stress
Publisher: ASCE
Abstract: Methane hydrates are an attractive source of future clean energy and are abundant in voids of sediments, in permafrost regions, and along continental slopes. Understanding the mechanical behavior of methane hydrate-bearing ...
DEM-Based Study on the Mechanical Behaviors of Pore-Filling MHBS under Drained True Triaxial Conditions Varying the Intermediate Stress Ratio of Constant Mean Effective Stresses
Publisher: ASCE
Abstract: Methane hydrate-bearing soils (MHBS) are natural soil deposits that contain methane hydrate (MH) in the pores and have attracted a huge amount of attention as alternative energy to study mechanical properties for realizing ...
Method for Estimating Normal Contact Parameters in Collision Modeling Using Discontinuous Deformation Analysis
Publisher: American Society of Civil Engineers
Abstract: This paper presents a contact parameter estimation method for collision modeling using discontinuous deformation analysis (DDA). Most DDA codes and discrete element method (DEM) codes use the viscoelastic contact model for ...
Excavation-Damaged Zone around Tunnel Surface under Different Release Ratios of Displacement
Publisher: American Society of Civil Engineers
Abstract: A tunnel excavation-damaged zone (EDZ) will gradually form with increasing release ratios of displacement (RRD) in the rock mass surrounding a tunnel. This paper presents a study of the longest subway tunnel in China, ...
Improved Prediction of Lateral Deformations due to Installation of Soil-Cement Columns
Publisher: American Society of Civil Engineers
Abstract: A modified method is proposed for predicting the lateral displacements of the ground caused by installation of soil-cement columns. The method is a combination of the original method derived on the basis of the theory of ...
Optimal Thresholds for Pavement Preventive Maintenance Treatments Using LTPP Data
Publisher: American Society of Civil Engineers
Abstract: One obstacle to the optimal time for pavement maintenance treatments based on the expected performance or cost-effectiveness is the lack of posttreatment performance models at different timings. This study first summarized ...
DEM Analyses of an Uplift Failure Mechanism with Pipe Buried in Cemented Granular Ground
Publisher: American Society of Civil Engineers
Abstract: The uplift failure mechanism of buried pipe and its linked soil resistance are key concerns in pipe design. Although the uplift responses of pipe buried in remolded backfill have been discussed extensively, little effort ...