Article
Energy & Fuels
Xiangcheng Que, Zhende Zhu, Zihao Niu, Shu Zhu, Luxiang Wang
Summary: Accurate description of the failure strength behaviors of rock materials, including intact rocks and jointed rock masses, is crucial for engineering design and construction. This paper proposes a novel three-dimensional (3D) version of the Hoek-Brown (HB) criterion for intact rocks, which incorporates the effects of intermediate and minimum principal stresses. The proposed criterion is validated and compared with existing criteria, showing the smallest prediction error for most rock types. Additionally, an empirical relationship between the material parameter and joint dip angle is developed for jointed rock masses, with the proposed relation exhibiting the best prediction performance.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2023)
Article
Engineering, Geological
Mingming He, Zhiqiang Zhang, Jiwei Zhu, Ning Li
Summary: The study proposes a new model to investigate the relationship between porosity and rock strength ratios, modifying the Hoek-Brown criterion to incorporate porosity instead of constants m(i) and s. Various rock tests show that the modified criterion effectively represents the impact of porosity on rock failure envelopes and can be used to estimate rock porosity and strength parameters.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Construction & Building Technology
Dianchun Du, Di Lei, Keqi Liu, Daniel Dias
Summary: This study investigates the lining internal forces of a quasi-rectangular tunnel designed according to the Hoek-Brown criterion in rock masses. By transforming the strength parameters and using the Hyperstatic Reaction Method (HRM), the influence of different tunnel depths, rock strengths, and geological parameters on the lining internal forces is analyzed. The results show that these parameters have a significant effect on the lining internal forces of the quasi-rectangular tunnel.
Article
Engineering, Geological
Jun-Hao Zhong, Xiao-Li Yang
Summary: This paper presents a new method for evaluating the stability of rock slopes based on the Hoek-Brown strength criterion, incorporating a rotational failure mechanism and a modified pseudo-dynamic method. The stability of rock slopes is measured through optimization of 21 angle variables and a time variable, with stability charts provided for quick assessment in engineering applications. Comparisons with existing literature validate the rationality and accuracy of the proposed procedure.
Article
Engineering, Mechanical
Yifan Chen, Hang Lin
Summary: The Hoek-Brown criterion is widely used in various fields. This study investigated the deterioration of Hoek-Brown parameters for freeze-thaw multi-fractured rock mass and proposed a new estimation method based on shear test. The values of GSI and mi were found to decrease with the increase of freeze-thaw cycles, following a negative exponential function model.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Mining & Mineral Processing
Junhao Zhong, Xiaoli Yang
Summary: This study adopts the piecewise linear method and proposes a new multi-horn rotational mechanism to improve the prediction accuracy of face stability in tunnels excavated in rock masses. The results show a significant improvement in support pressure compared with traditional methods, and the rock strength parameters have an important influence on face stability.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Geological
Tianzheng Li, Qiujing Pan, Zhichao Shen, Wenping Gong
Summary: In this paper, a probabilistic stability analysis is conducted to investigate the face instability in tunnel excavations in heavily fractured rock masses. By modeling the fractured rock masses as spatially random media following the Hoek-Brown failure criterion, the method of Karhunen-Loeve expansion is used to characterize the spatial variabilities of Hoek-Brown parameters. The multi-tangent method is proposed to integrate the nonlinear Hoek-Brown failure envelope into the kinematical approach of limit analysis. The study also employs global sensitivity analysis and a sparsity scheme to reduce the dimensionality of the problem.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Geological
Suraparb Keawsawasvong, Jim Shiau
Summary: This study presents an advanced approach to evaluate the stability of Hoek-Brown rock mass with a spherical cavity, using rigorous upper bound and lower bound solutions of stability factors solved through advanced finite element limit analysis. Comprehensive design charts, tables, and equations are provided for stability evaluation.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Jing Liu, Sheng Xu, Xiao-Li Yang
Summary: The seismic bearing capacity of a strip footing on rock masses is investigated using the upper bound theorem of limit analysis in this paper. The equivalent Mohr-Coulomb parameters of the modified Hoek-Brown criterion are obtained using the generalized tangential technique. The seismic effects are evaluated using the modified pseudo-dynamic (MPD) method, taking into account the damping characteristics of the site and the dynamic characteristics of the seismic waves. A parametric study is conducted, and the results show that the seismic acceleration coefficient, geological strength index, material constant of the intact rock, and normalized frequency all have a significant impact on the seismic bearing capacity.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Engineering, Geological
Kaizong Xia, Congxin Chen, Tianlong Wang, Yun Zheng, Yue Wang
Summary: This study develops a method to estimate GSI and D values using acoustic wave velocity, and proposes a new method for determining the mechanical parameters of the rock mass based on these improved values. The analysis results show that the method accurately reflects the factors affecting rock mass quality and disturbance, and its reliability is verified in practical engineering.
ENGINEERING GEOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Ana Alencar, Ruben Galindo, Claudio Olalla Maranon
Summary: This paper studies the bearing capacity of a shallow foundation on rock mass using a parametric study by a finite difference method. Results are compared between numerical and analytical solutions, and a correlation factor function of the self-weight is proposed for estimating the bearing capacity of a bridge foundation.
APPLIED SCIENCES-BASEL
(2021)
Article
Green & Sustainable Science & Technology
Di Wu, Xin Chen, Yongchao Tao, Xiaodong Meng
Summary: This study used the tangential method and quasi-static method to investigate the influence of nonlinear parameters, geometric parameters, and earthquake loads on the equivalent Mohr-Coulomb (MC) strength parameters of rock slope. The results showed that the nonlinear parameters have different effects on MC parameters for general steep slopes and vertical slopes, and the effect of slope inclination on MC parameters is significant in fractured hard rock masses. The 3D effect of rock slope on MC parameters was found to be minimal, and the impact of earthquakes on MC parameters becomes weaker for steeper rock slopes. The tables of approximate MC strength parameters provided in this study can serve as references for practical slope engineering.
Article
Engineering, Geological
Guilherme J. C. Gomes, John H. Forero, Euripedes A. Vargas, Jasper A. Vrugt
Summary: This paper discusses the importance of understanding rock anisotropy for reliability analysis and engineering design, and proposes a formulation for calculating strength anisotropy embedded in a Bayesian framework for practical application. The results demonstrate the accuracy of the proposed model in predicting peak strengths of rocks with varying degrees of anisotropy, confining stresses and anisotropy orientations, emphasizing the need for explicit treatment of strength anisotropy uncertainty in rock mechanics studies. The Bayesian methodology is versatile and can assist in informing geotechnical engineers, contractors, and other professionals about rock conditions, design reliability, and overall risks of engineering structures.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
Article
Engineering, Geological
Jianhong Man, Mingliang Zhou, Dongming Zhang, Hongwei Huang, Jiayao Chen
Summary: This paper presents a 2D analytical model for estimating the face stability of a rock tunnel in the presence of stratified rock masses. The results indicate that the thickness of the rock layer, tunnel diameter, and arrangement sequence of weak and strong rock layers significantly affect the tunnel face stability.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2022)
Article
Acoustics
Junhao Zhong, Chuantan Hou, Xiaoli Yang
Summary: This study investigates the ultimate bearing capacity of shallow foundations on rock masses during earthquakes using an upper-bound limit analysis method. A modified pseudodynamic method (MPD) is used to characterize the spatiotemporal variation in earthquake acceleration, considering the influence of Rayleigh waves. The strength of the rock masses follows the generalized Hoek-Brown criterion, and the plastic flow at failure complies with the associated flow rule. The study provides an analytical solution for seismic bearing capacity based on the energy equilibrium theorem of limit analysis.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Environmental Sciences
Pierluigi Brandolini, Andrea Cevasco, Domenico Capolongo, Giacomo Pepe, Francesco Lovergine, Maurizio Del Monte
LAND DEGRADATION & DEVELOPMENT
(2018)
Article
Engineering, Geological
Yuri Galanti, Michele Barsanti, Andrea Cevasco, Giacomo D'Amato Avanzi, Roberto Giannecchini
Article
Environmental Sciences
Pierluigi Brandolini, Giacomo Pepe, Domenico Capolongo, Chiara Cappadonia, Andrea Cevasco, Christian Conoscenti, Antonella Marsico, Francesca Vergari, Maurizio Del Monte
LAND DEGRADATION & DEVELOPMENT
(2018)
Article
Environmental Sciences
M. Ferrari, L. Carpi, G. Pepe, L. Mucerino, C. F. Schiaffino, M. Brignone, A. Cevasco
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Environmental Sciences
Marina Zingaro, Alberto Refice, Emanuele Giachetta, Annarita D'Addabbo, Francesco Lovergine, Vito De Pasquale, Giacomo Pepe, Pierluigi Brandolini, Andrea Cevasco, Domenico Capolongo
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Environmental Sciences
Giacomo Pepe, Andrea Mandarino, Emanuele Raso, Patrizio Scarpellini, Pierluigi Brandolini, Andrea Cevasco
Article
Green & Sustainable Science & Technology
Daniele Giordan, Martina Cignetti, Danilo Godone, Silvia Peruccacci, Emanuele Raso, Giacomo Pepe, Domenico Calcaterra, Andrea Cevasco, Marco Firpo, Patrizio Scarpellini, Marta Gnone
Article
Geosciences, Multidisciplinary
Andrea Baucon, Michele Piazza, Roberto Cabella, Maria Cristina Bonci, Leda Capponi, Carlos Neto de Carvalho, Antonino Briguglio
Article
Geography, Physical
Andrea Baucon, Carlo Corradini, Matteo Floris, Antonino Briguglio, Roberto Cabella, Nicola Campomenosi, Michele Piazza, Maria G. Corriga
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2020)
Article
Environmental Sciences
Mariano Di Napoli, Diego Di Martire, Giuseppe Bausilio, Domenico Calcaterra, Pierluigi Confuorto, Marco Firpo, Giacomo Pepe, Andrea Cevasco
Summary: This study utilized a combined approach, including Machine Learning techniques and GIS, to assess shallow landslide susceptibility in the Cinque Terre area. It provided a susceptibility map describing detachment, transit, and runout, which can be used for land planning and risk management purposes.
Article
Environmental Sciences
Andrea Mandarino, Giacomo Pepe, Andrea Cevasco, Pierluigi Brandolini
Summary: This study investigated the active-channel planform adjustments of the Centa, lower Arroscia, and lower Neva rivers since 1930, along with riverbed channelization processes and land-use changes using remote sensing and GIS. The results highlighted the significant impact of early channelization works on the river morphology and the key role played by these adjustments in the urbanization process of Ligurian major valley floors during the 20th century.
Article
Geosciences, Multidisciplinary
Giacomo Pepe, Dario Filippi, Andrea Cevasco
ITALIAN JOURNAL OF ENGINEERING GEOLOGY AND ENVIRONMENT
(2019)
Article
Geography
Emanuele Raso, Andrea Cevasco, Diego Di Martire, Giacomo Pepe, Patrizio Scarpellini, Domenico Calcaterra, Marco Firpo
Article
Engineering, Environmental
Giacomo Pepe, Simone Mineo, Giovanna Pappalardo, Andrea Cevasco
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2018)
Article
Geosciences, Multidisciplinary
Carlotta Bartelletti, Yuri Galanti, Michele Barsanti, Roberto Giannecchini, Giacomo D'Amato Avanzi, Maria Giuseppina Persichillo, Massimiliano Bordoni, Claudia Meisina, Andrea Cevasco, Jorge Pedro Galve
RENDICONTI ONLINE SOCIETA GEOLOGICA ITALIANA
(2018)