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RISEffects of Rock Specimen Size on Mechanical Properties in Laboratory Testing
Publisher: ASCE
Abstract: The design of rock engineering projects requires an estimation of the strength of intact rock blocks. These blocks can be significantly larger than the typical laboratory test specimen; thus, understanding the specimen ...
Evaluating Damage and Microcracking Behavior of Granite Using NMR Testing under Different Levels of Unconfined Compression
Publisher: American Society of Civil Engineers
Abstract: This work discusses the results from tests performed to investigate the damage and microcracking behaviors of granites. The samples, previously loaded to varying predefined stress levels and then unloaded to zero, were ...
Numerical Analysis of Degradation Characteristics for Heterogeneous Rock under Coupled Thermomechanical Conditions
Publisher: American Society of Civil Engineers
Abstract: The effects of high temperature on rock strength and deformation, and hence the integrity of rock structure, have been a significant issue for rock mechanics and engineering. This article adopts a coupled thermomechanical ...
New Algorithm for Simulating Grout Diffusion and Migration in Fractured Rock Masses
Publisher: ASCE
Abstract: It is of crucial importance to develop an efficient numerical method to investigate the mechanism of grout diffusion and migration in fractured rock masses. However, most existing models only concentrate on the grout flow ...
Numerical Investigation on the Grouting Penetration Process of Quick-Setting Grout in Discrete Fractured Rock Mass Based on the Combined Finite–Discrete-Element Method
Publisher: ASCE
Abstract: In this study, a combined finite–discrete-element method (FDEM)-based grouting simulator, in which the effect of time-dependent rheological characteristic caused by grout hydration on grouting penetration is adequately ...
Effect of Microstructure on Changes to the Pore Structure and Mechanical Properties of Limestone under Acidic Groundwater Corrosion
Publisher: ASCE
Abstract: Rock mass subjected to acidic groundwater corrosion may cause great property alteration. In this work, the effects of microstructure on change of the pore structure and mechanical property under acid corrosion were ...
Mechanism of Cracking in Dams Using a Hybrid FE-Meshfree Method
Publisher: American Society of Civil Engineers
Abstract: Cracking has a significant impact on dam safety. A discontinuous hybrid finite-element meshfree (FE-meshfree) method, which inherits advantages from both the FEM and the meshfree method, was developed to investigate the ...
Improved Strength Criterion and Numerical Manifold Method for Fracture Initiation and Propagation
Publisher: American Society of Civil Engineers
Abstract: This paper develops a novel empirical strength criterion and proposes a manifold method for fracture initiation and propagation. First, to investigate the influencing factors of fractured rock mass strength, a set of ...
Freezing Strain Model for Estimating the Unfrozen Water Content of Saturated Rock under Low Temperature
Publisher: American Society of Civil Engineers
Abstract: The freeze-thaw damage of rock is mainly induced by the 9% volumetric expansion of frozen water. It has already been demonstrated that unfrozen water exists in porous material at the freezing point. Accurate estimation of ...
Analytical Solutions for Deep-Buried Lined Tunnels Considering Longitudinal Discontinuous Excavation in Rheological Rock Mass
Publisher: ASCE
Abstract: For tunneling in a deep, soft rock mass, rock deformation and lining pressure, which are time-dependent behaviors, are mainly affected by rock rheology and longitudinal excavation processes. In practice, tunneling operations ...