Empirical Evaluation of RMR, GSI, and Q for Underground Excavations

Article Materials Science, Multidisciplinary

Research on the Stress and Deformation Characteristics of Circular Foundation Pit during Excavation in Sand Soil

Xuhe Gao et al.

Summary: This research focuses on the excavation and support project of a circular foundation pit in the sandy soil layer of the west anchorage of Humen Second Bridge. It proposes a new method for checking simulation parameters based on the excursion monitoring data of the diaphragm wall. The stress and deformation mechanism of the soil layer and supporting structure during the excavation and support of a circular foundation pit in the sand layer is obtained.

ADVANCES IN MATERIALS SCIENCE AND ENGINEERING (2023)

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Article Engineering, Geological

Correlation of Bieniawski's RMR and Barton's Q System in the Nepal Himalaya

Kanchan Chaulagai et al.

Summary: Rock mass classification systems are essential tools for determining the composition and characteristics of rock masses, and have been widely applied in various projects in the Nepal Himalaya region. Among several classification systems, RMR, Q, and GSI are the most accepted and implemented ones. This research aims to establish precise relationships between RMR, Q, and GSI in Nepal Himalaya using data from tunnel excavations in five different projects. By conducting regression analysis, logarithmic, linear, and logarithmic equations were developed to estimate RMR from Q, GSI from RMR, and GSI from Q, respectively.

INDIAN GEOTECHNICAL JOURNAL (2023)

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Article Geosciences, Multidisciplinary

Force and deformation response analysis of dual structure slope excavation and support

Xuhe Gao et al.

Summary: This study addresses the issue of fuzzy selection basis for dual-structure slope simulation calculation parameters and the complex force and deformation of the slope body during the support process. Using a specific project as an example, a new method for checking simulation parameters of deep displacement monitoring data is proposed, along with a superposition calculation method for pore water pressure to achieve slope stress-seepage coupling. The study also presents an analysis method for slope excavation and support process. The research results have great theoretical guiding significance for the measurement and control simulation and early warning analysis of the dual-structure slope construction process.

GEOMATICS NATURAL HAZARDS & RISK (2022)

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Article Mining & Mineral Processing

Correlation of Schmidt Hammer Rebound Number and Point Load Index with Compressive Strength of Sedimentary, Igneous and Metamorphic Rocks

N. Abbas et al.

Summary: This study develops a model that can predict uniaxial compressive strength using indirect techniques such as the Schmidt hammer rebound number and Point Load Index. The quadratic model shows the highest correlation among the tested models on different rock types.

JOURNAL OF MINING SCIENCE (2022)

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Article Construction & Building Technology