Peihua Xu's research while affiliated with Jilin University and other places

Publications (22)

Article
Landslide susceptibility analysis at the regional scale is the focus of landslide risk management. To obtain more accurate and guiding significance results of landslide susceptibility, it is necessary to conduct a refined analysis on the basis of regional scale. Therefore, we proposed a refined method for landslide susceptibility assessment. This m...
Article
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In this study, four representative machine learning methods (support vector machine (SVM), maximum entropy (MaxEnt), random forest (RF), and artificial neural network (ANN)) were employed to construct a landslide susceptibility map (LSM) in Xulong Gully (XLG), southwest China. The models were subsequently compared in order to select the best-perfor...
Article
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Landslides and collapses are common geological hazards in mountainous areas, posing significant threats to the lives and property of residents. Therefore, early identification of disasters is of great significance for disaster prevention. In this study, we used Small Baseline Subset Interferometric Synthetic Aperture Radar (SBAS-InSAR) technology t...
Article
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Slope failure, which causes destructive damage and fatalities, is extremely common in mountainous areas. Therefore, the stability and potential failure of slopes must be analysed accurately. For most fractured rock slopes, the complexity and random distribution of structural fractures make the aforementioned analyses considerably challenging for en...
Article
Rock masses are highly characterized by size effect due to the existence of complex discontinuities, which could be reflected by representative volume element (RVE). This study exemplified calculation of RVE in Datengxia sluice rock mass analysis with consideration of anisotropy, which extends the application of traditional RVE featured by three-di...
Article
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This study takes sluice foundation rock mass in Datengxia Hydropower Station, China as an example to examine two-dimensional (2D) discrepancies in fracture geometric factors and connectivity between field-collected and stochastically modeled discrete fracture networks (DFNs). We discover that the trace lengths of field-collected and corresponding m...
Preprint
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Abstract. Slope failure, which causes destructive damage and fatalities, is extremely common in mountainous areas. Therefore, the stability and potential failure of slopes must be analyzed accurately. For most fractured rock slopes, the complexity and random distribution of structural fractures make the aforementioned analyses considerably challeng...
Article
A large number of landslides have occurred in the upstream reaches of the Jinsha River, Tibetan Plateau due to the intensity of tectonic movement in the area. Remote sensing and field investigation indicate that one of them, the Samaoding paleolandslide, previously blocked the river. Various river-blocking phenomena are well preserved, including th...
Article
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Driven by the pull of gravity, mass-wasting comprises all of the sedimentary processes related to remobilization of sediments deposited on slopes, including creep, sliding, slumping, flow, and fall. It is vital to conduct mass-wasting susceptibility mapping, with the aim of providing decision makers with management advice. The current study present...
Article
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The clustering and classification of fracture orientation data are crucial tasks in geotechnical engineering and rock engineering design. The explicit simulation of fracture orientations is always applied to compensate for the lack of direct measurements over the entire rock mass. In this study, a single step approach based on the theory of finite...
Article
Fracture intensity, the degree of fracturing in rock masses, is one of the fundamental parameters used in characterizing rock mass as a fracture network. Among fracture intensity measures, volumetric fracture intensity (P32) is the most useful, since it directly reflects the degree of rock mass fracturing, independent of fracture orientation and si...
Article
To simulate debris flow run-out, the governing equations for free-surface shallow flow are corrected by setting the basal flow resistance coefficients with the quadratic rheological friction model. A well-balanced numerical scheme is developed for its run-out simulation over irregular topography. A linear reconstruction is adopted for improving the...
Article
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The Longzi River Basin in Tibet is located along the edge of the Himalaya Mountains and is characterized by complex geological conditions and numerous landslides. To evaluate the susceptibility of landslide disasters in this area, eight basic factors were analyzed comprehensively in order to obtain a final susceptibility map. The eight factors are...
Article
Debris flows could cause large amounts of damage in the alluvial fan where many houses and transport infrastructures exist. Thus, runout analysis of potential debris flows in these areas is necessary for protecting human lives, houses and infrastructure. Currently, the numerical simulation method is an effective way to intuitively display the runou...
Article
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Discontinuities formed by different geological processes strongly affect the inhomogeneity of a rock mass. Demarcation of statistically homogeneous regions is useful to speculate the tectonic evolution history. Therefore, a new method is introduced to divide the homogeneous structural domains based on multiple discontinuity characteristics. The new...
Article
Full-text available
This study focused on a cloud model approach for considering debris-flow hazard assessment, in which the cloud model provided a model for transforming the qualitative and quantitative expressions. Additionally, the entropy method and analytical hierarchy process were united for calculating the parameters weights. The weighting method avoids the dis...
Article
A stepwise algorithm for determining the intersections between fractures is presented. The stepwise approach is based on the bounding volume technology and separating axis theorem. The length and orientation distribution of the fracture intersections can be obtained by the stepwise approach. The stepwise approach is used to study the connectivity o...
Article
Full-text available
A method was developed to analyze the susceptibilities of 541 regional basins affected by debris flows at the Wudongde Dam site in southwest China. Determining susceptibility requires information on source material quantity and occurrence frequency. However, the large number of debris flows can hinder the individual field investigation in a each sm...
Article
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This study focused on producing flash flood hazard susceptibility maps (FFHSM) using frequency ratio (FR) and statistical index (SI) models in the Xiqu Gully (XQG) of Beijing, China. First, a total of 85 flash flood hazard locations (n = 85) were surveyed in the field and plotted using geographic information system (GIS) software. Based on the flas...
Article
Full-text available
This study used a case study of an underground excavation in Baihetan Dam, China to identify structural domains, which are highly affected by size effects. The magnification and reduction methods involving nonparametric hypothesis tests of the KS, T-, and F-tests were proposed for the identification of structural domains. This process considers the...

Citations

... And by comparing the models, the model with the best performance was selected. e experimental results show that the linear improvement of the optimal SVM model has better performance and the ability to overcome factor defects [8]. ...
... After the establishment of the 3D HRPC model described previously, the model was analyzed to identify the main characteristics of the rock mass structure, such as the detection and mapping of the discontinuities and discontinuity sets, orientation and dip of discontinuities, spacing of discontinuities, persistence of discontinuities, and roughness of discontinues, as well as determination of rock block volumes. Due to the increasing use of UAV photogrammetry and the SfM technique to create 3D HRPC models, various automatic and semi-automatic techniques and methods have been developed to detect and map the discontinuities and discontinuity sets [20,[22][23][24][25][26]28,31,, orientation and dip direction of discontinuities [18,20,22,23,26,28,29,31,[37][38][39][40][42][43][44][45]48,49,[54][55][56][57][59][60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75], spacing of discontinuities [20][21][22][23]32,37,42,46,49,53,63,65,70,72,[75][76][77][78][79][80][81][82][83], persistence of discontinuities [21,22,31,44,47,48,62,73,76,77,80,[83][84][85], and roughness of discontinuities [22,26,37,71,86,87]. In this study, a combination of traditional geological and geotechnical field surveys [86,88] and remote sensing techniques were employed to detect and mapping of the discontinuities and discontinuity sets, orientation and dip of discontinuities, and other discontinuity features necessary for the analyses of rockfall occurrences and their consequences. ...
... The hydraulic properties of fracture networks which constitute the main flow paths are of significant importance for fluid flow and transport in fractured rock masses with negligibly low permeability of matrix [1][2][3][4][5][6]. Natural fracture networks usually show a strong hydraulic variability which comes from the overall statistical geometry characteristics [7][8][9][10][11][12][13]. The discrete fracture network (DFN) models are conceived for modeling the spatial structures and geometric features of nat-urally fractured rocks quite well [7][8][9][10][14][15][16][17][18][19][20][21][22]. Therefore, DFN modeling is applicable for investigating the effect of geometric characteristics on the hydraulic properties in fractured rock masses. ...
... The impact-induced fragmentation of rock is a common phenomenon in natural hazards, especially in northwest China where rockslides, rockfalls, and rock avalanches frequently occur (Giani et al., 2004;Yao et al., 2015;Bao et al., 2020;Zhou et al., 2020). The motion trajectory of rock blocks can also be greatly affected by the impact-induced fragmentation process (De Blasio and Crosta, 2015;Zhao, 2018). ...
... Logistic regression models are the most widely used of linear regression analysis. Neural networks (Cao et al. 2019) is a kind of nonlinear regression approaches and artificial neural network (ANN) (Tian et al. 2019) as one of the major neural network algorithms is developed on the basis of neural network. Model algorithm accuracy and diversification have improved geological hazard susceptibility mapping, particularly with the rapid growth of computer technology and the popularization of GIS techniques (Tehrani et al. 2021). ...
... Up to now, various unsupervised algorithms are available for clustering unlabeled data (Jain et al. 1999;Xu and Wunsch 2005;Omran et al. 2007;Jain 2010), and they can be divided into partitioning method, hierarchical method, density-based method, graph theory-based method, model-based method, and grid-based method (Table 1). These algorithms have promoted the development of identification of rock discontinuity sets, and considerable progress has been obtained in orientation-based (the input data of these algorithms is discontinuity orientation) clustering methods (Zhan et al. 2017a;Battulwar et al. 2021). Partitioning clustering method is the most widely used method. ...
... Therefore, the prediction of the landslide dynamic process based on numerical modeling has been a hot research topic in recent years. Discrete element models (Tang et al. 2009;Lu et al. 2014;Zhou et al. 2015;Spreafico et al. 2016;Borykov et al. 2019), smooth particle hydrodynamic models Cascini et al. 2016;Dai and Huang 2016;Zhu et al. 2018), the finite volume shallow water flow model (Medina et al. 2008;Yavari-Ramshe et al. 2015;Han et al. 2017Han et al. , 2018 and many other new methods have been applied to the simulation and prediction of geological disasters. These models can solve large deformation problems under complex conditions. ...
... P 32 (m 2 /m 3 ) is the fracture area per rock mass volume, indicating that the value of this parameter comprehensively depends on fracture density and size. The Delaunay triangulation method is used to determine the P 32 value (Zhang et al. 2017a), Content courtesy of Springer Nature, terms of use apply. Rights reserved. ...
... Therefore, the prediction of the landslide dynamic process based on numerical modeling has been a hot research topic in recent years. Discrete element models (Tang et al. 2009;Lu et al. 2014;Zhou et al. 2015;Spreafico et al. 2016;Borykov et al. 2019), smooth particle hydrodynamic models Cascini et al. 2016;Dai and Huang 2016;Zhu et al. 2018), the finite volume shallow water flow model (Medina et al. 2008;Yavari-Ramshe et al. 2015;Han et al. 2017Han et al. , 2018 and many other new methods have been applied to the simulation and prediction of geological disasters. These models can solve large deformation problems under complex conditions. ...