Article
Engineering, Geological
Pin Zhang, Zhen-Yu Yin, Yin-Fu Jin
Summary: This study proposes a modeling strategy for developing prediction models for soil properties in geotechnical engineering using the Bayesian neural network (BNN) with a strong non-linear fining capability and uncertainty. The results show that BNN can accurately predict compression index and undrained shear strength, but its reliability is low in sparse datasets. Additionally, a novel parametric analysis method is proposed to capture the relationship between input parameters and soil properties.
CANADIAN GEOTECHNICAL JOURNAL
(2022)
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
Engineering, Geological
Shuyue Ma, Haijun Qiu, Dongdong Yang, Jiading Wang, Yaru Zhu, Bingzhe Tang, Kui Sun, Mingming Cao
Summary: Underground coal mining causes significant damage to the ecological environment. Studying the ecological vulnerability of mining areas and the development characteristics of surface multi-hazards is crucial. Using D-InSAR technology, the deformation area of a coal mine was identified, showing that mining sequence controls the spatial evolution of the deformation areas. Historical images characterized surface fissures and landslides. Particle flow numerical simulation analysis revealed three stages in the subsidence-fissure-landslide hazard chain, with fissures playing a crucial role.
Article
Engineering, Geological
Zhiwei Zhou, Guoyu Li, Mingde Shen, Qingzhi Wang
Summary: This study experimentally investigates the effects of freeze-thaw cycles on the dynamic responses of frozen subgrade soil, revealing different critical cycle numbers for dynamic shear modulus and damping ratio under different freezing low temperatures. A theoretical model is developed to describe the evolutionary features of these parameters, providing valuable insights for assessing the degeneration of engineering properties in frozen subgrade soil.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Civil
Mohammadreza Koopialipoor, Panagiotis G. Asteris, Ahmed Salih Mohammed, Dimitrios E. Alexakis, Anna Mamou, Danial Jahed Armaghani
Summary: In this research, a new system for the prediction of rock deformation was developed using various machine learning models. The developed model achieved the highest prediction accuracy among the tested models.
TRANSPORTATION GEOTECHNICS
(2022)
Article
Engineering, Geological
Haohua Chen, Lin Li, Jingpei Li, De'an Sun
Summary: This paper presents a generic analytical solution for stresses and displacements developed around an arbitrarily shaped underground opening excavated in an elastic soil/rock mass. The proposed solution provides a simpler and more straightforward approach compared to complex theory-based solutions.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2022)
Article
Engineering, Environmental
Yueping Yin, Luqi Wang, Wengang Zhang, Zhihua Zhang, Zhenwei Dai
Summary: In this paper, an analytical method using damage evolution and numerical simulation is proposed to study the evolution process of thick-layer dangerous rock masses (TDRM) on reservoir banks. The effectiveness of this new method has been verified through a case study on the Jianchuandong dangerous rock mass (JDRM) in the Three Gorges Reservoir area.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Engineering, Civil
Nauman Ijaz, Weimin Ye, Zia Ur Rehman, Fuchu Dai, Zain Ijaz
Summary: Numerous laboratory-based solutions have been proposed for stabilizing unsaturated expansive soil by recycling lignosulphonate. However, practical assessments are required for treating rainfall-induced surficial failure in unsaturated expansive soil slopes. The stability of LS-treated surficial layer requires consideration of the hydro-mechanical effect. Among LS-based stabilizers, composite cementing admixture (CCA) provides the safest critical factor of safety for slope stability while mitigating the heave problem.
TRANSPORTATION GEOTECHNICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Changjie Zheng, George Kouretzis, Xuanming Ding, Lubao Luan
Summary: This paper presents an analytical solution to describe the dynamic interaction between a single end bearing pile and its surrounding poroelastic soil. The solution considers both the two-phase soil and the pile as three-dimensional continua, allowing for the analysis of wave propagation and its effects on pile response.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Engineering, Geological
Yongqiang Zhou, Qian Sheng, Nana Li, Xiaodong Fu
Summary: A dynamic constitutive model for rock materials suitable for dynamic cyclic loading was established, and numerical tests were conducted on a hard rock under true triaxial dynamic cyclic loading with different loading rates to study the dynamic deformation and mechanical properties.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Geological
Yong Liu, Kai-Qi Li, Dian-Qing Li, Xiao-Song Tang, Shi-Xiang Gu
Summary: In this study, a unit cell model of freeze pipes was established to examine the effects of uncertainties such as groundwater seepage, freeze pipe inclination, and spatial variability in thermal conductivity on the AGF system. Results show that considering these uncertainties can help evaluate the additional freezing time required and provide reasonable freeze pipe spacing and critical seepage velocity.
Article
Engineering, Geological
Shi-Gui Du, Hang Lin, Rui Yong, Guang-Jian Liu
Summary: In this paper, a global search method is proposed to investigate the heterogeneity of rock joint roughness. The method analyzes the statistical characteristics of roughness from all samples extracted from different locations of the joint. Compared to conventional methods, the global search method provides a more accurate representation of the overall roughness and facilitates the identification of the most representative samples and their positions.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Geological
Jian Yang, Li-Yun Fu, Yonghao Zhang, Tongcheng Han
Summary: This study investigates the temperature and pressure-dependent elastic properties of porous rocks in relation to the characteristics of pore microstructures. The results show that these microstructural properties can be estimated from dynamic and static moduli, and can be described using the MT and DZ models.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Geological
Tao Yan, Shui-Long Shen, Annan Zhou, Xiangsheng Chen
Summary: This study presents a framework for predicting geological characteristics by integrating a stacking classification algorithm (SCA) with a grid search (GS) and K-fold cross validation (K-CV). The accuracy of the SCA can be improved with the use of GS and K-CV. The proposed torque penetration index (TPI) and field penetration index (FPI) express the geological characteristics, while the elbow method (EM) and silhouette coefficient (Si) determine the types of geological characteristics.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2022)
Article
Engineering, Geological
Zhipeng Wu, Jian Xu, Yanfeng Li, Songhe Wang
Summary: A uniaxial strain-softening constitutive model for fiber-reinforced soils is developed based on the disturbed state concept. The model considers the response in the intact state and fully adjusted state, and the apparent stress-strain curve is derived from a weighted average of these two responses. The model demonstrates that fiber content has a greater influence on reinforcement effect than fiber length. Evaluation of test data shows that the model predicts stress-strain curves in good agreement with experimental results, and accurately describes the fiber reinforcement effect.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2022)
Review
Engineering, Civil
D. Losanno, A. Calabrese, I. E. Madera-Sierra, M. Spizzuoco, J. Marulanda, P. Thomson, G. Serino
Summary: Efforts in the past decade have been made to develop low-cost seismic protection systems using flexible materials to replace steel sheets in conventional base isolation devices. Recycled rubber bearings have shown promising performance in unbounded configurations. Although the performance of natural rubber bearings is better, recycled rubber devices have great potential in protecting non-engineered structures from seismic inputs at a lower cost.
JOURNAL OF EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Geological
Naifei Liu, Ning Li, Guofeng Li, Zhanping Song, Shuangjie Wang
Summary: A method for evaluating the equivalent thermal conductivity of a rock mass was proposed in this study, which can accurately analyze freeze-thaw cycles and consider the impact of fracture parameters on the thermal conductivity of the rock mass.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Civil
Hang Lin, Penghui Sun, Yifan Chen, Youyan Zhu, Xiang Fan, Yanlin Zhao
Summary: This study proposes a modified model for shear strength calculation of bolted joints, taking into consideration the influence area and coefficient of the bolt. The model is validated through comparison with experimental results for saw-tooth joints with a single bolt.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2022)
Article
Engineering, Geological
Yang Xiao, Xiang He, Armin W. Stuedlein, Jian Chu, T. Matthew Evans, Leon A. van Paassen
Summary: A significant issue in microbially induced calcium carbonate precipitation (MICP) is the heterogeneous growth mechanics of calcium carbonate crystals. This study used microfluidic chip tests to visualize the distribution of bacteria and CaCO3 in a quiescent state. The experiments showed that bacterial diffusion was hindered in the presence of high concentration of CaCl2, while diffusion appeared homogeneous at low concentration. Furthermore, the distribution of CaCO3 was more uniform at low concentration compared to high concentration.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2022)
Article
Energy & Fuels
Quanle Zou, Tiancheng Zhang, Zhiheng Cheng, Zebiao Jiang, Shixiang Tian
Summary: The rational selection of the first mining seam in a coal seam group is crucial for ensuring the safety of coal mining and preventing gas disasters. This paper proposes a method for evaluating the rationality of selecting the first mining seam and verifies its reliability through a case study.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2022)
