International Journal for Numerical and Analytical Methods in Geomechanics最新文献_第10页

A Dynamic Three-Field Finite Element Model for Wave Propagation in Linear Elastic Porous Media 线性弹性多孔介质中波传播的动态三场有限元模型

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-12-18 DOI: 10.1002/nag.3916

Bruna Campos, Robert Gracie

{"title":"A Dynamic Three-Field Finite Element Model for Wave Propagation in Linear Elastic Porous Media","authors":"Bruna Campos, Robert Gracie","doi":"10.1002/nag.3916","DOIUrl":"10.1002/nag.3916","url":null,"abstract":"<p>A three-field finite element (FE) model for dynamic porous media considering the de la Cruz and Spanos (dCS) theory is presented. Due to fluid viscous dissipation terms, wave propagation in the dCS theory yields an additional rotational wave compared to Biot (BT) theory. In addition, introducing porosity as a dynamic variable in the dCS model allows solid-fluid nonreciprocal interactions. Due to the volume-averaging technique, the dCS model further accounts for a macroscopic shear modulus and adds a new macroscopic constant. The porous media governing equations are formulated in terms of solid displacement, fluid pressure, and fluid displacement. Space and time convergence rates for the FE dCS model are demonstrated in a one-dimensional case. A dimensionless analysis performed in the dCS framework led to negligible differences between BT and dCS models except when assuming high fluid viscosity. Domains with small characteristic lengths resulted in BT and dCS damping terms in the same order of magnitude. One- and two-dimensional examples showed that dCS nonreciprocal interactions and the macroscopic shear modulus are responsible for modifying wave patterns. A two-dimensional injection well simulation with water and slickwater showed higher wave attenuation for the latter. High frequencies in dCS model were noticed to yield more significant changes in wave patterns. The numerical results highlight the contributions of the dCS porous media model and its importance in simulations of laboratory scale experiments, ultrasonic frequencies, and highly viscous fluids.</p>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 4","pages":"1139-1157"},"PeriodicalIF":3.4,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/nag.3916","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142858231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

AI-Driven Approach for Sustainable Extraction of Earth's Subsurface Renewable Energy While Minimizing Seismic Activity 人工智能驱动的地球地下可再生能源可持续开采方法，同时最大限度地减少地震活动

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-12-17 DOI: 10.1002/nag.3923

Diego Gutiérrez-Oribio, Alexandros Stathas, Ioannis Stefanou

{"title":"AI-Driven Approach for Sustainable Extraction of Earth's Subsurface Renewable Energy While Minimizing Seismic Activity","authors":"Diego Gutiérrez-Oribio, Alexandros Stathas, Ioannis Stefanou","doi":"10.1002/nag.3923","DOIUrl":"10.1002/nag.3923","url":null,"abstract":"<p>Deep geothermal energy, carbon capture and storage, and hydrogen storage hold considerable promise for meeting the energy sector's large-scale requirements and reducing <span></span><math>\u0000 <semantics>\u0000 <msub>\u0000 <mtext>CO</mtext>\u0000 <mn>2</mn>\u0000 </msub>\u0000 <annotation>$text{CO}_2$</annotation>\u0000 </semantics></math> emissions. However, the injection of fluids into the Earth's crust, essential for these activities, can induce or trigger earthquakes. In this paper, we highlight a new approach based on reinforcement learning (RL) for the control of human-induced seismicity in the highly complex environment of an underground reservoir. This complex system poses significant challenges in the control design due to parameter uncertainties and unmodeled dynamics. We show that the RL algorithm can interact efficiently with a robust controller, by choosing the controller parameters in real time, reducing human-induced seismicity, and allowing the consideration of further production objectives, for example, minimal control power. Simulations are presented for a simplified underground reservoir under various energy demand scenarios, demonstrating the reliability and effectiveness of the proposed control–RL approach.</p>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 4","pages":"1126-1138"},"PeriodicalIF":3.4,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/nag.3923","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142832151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Probabilistic Assessment of Soil–Rock Mixture Slope Failure Considering Two-Phase Rotated Anisotropy Random Fields 考虑两相旋转各向异性随机场的土岩混合物边坡崩塌概率评估

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-12-16 DOI: 10.1002/nag.3921

Chuanxiang Qu, Yutong Liu, Haowen Guo, Hongjie Fang, Kaihao Cheng, Haoran Yuan, Yong Chen

{"title":"Probabilistic Assessment of Soil–Rock Mixture Slope Failure Considering Two-Phase Rotated Anisotropy Random Fields","authors":"Chuanxiang Qu, Yutong Liu, Haowen Guo, Hongjie Fang, Kaihao Cheng, Haoran Yuan, Yong Chen","doi":"10.1002/nag.3921","DOIUrl":"10.1002/nag.3921","url":null,"abstract":"<div>\u0000 \u0000 <p>Soil–rock mixture (SRM) slopes consist of soils and rocks and are widely distributed globally. In addition to heterogeneity and discontinuity within SRM slopes, the inherent spatial variability can be observed in soil and rock properties. However, spatial variability in rock and soil properties and layouts has not been well considered in the stability analysis of SRM slopes. Additionally, SRM slopes commonly show a rotated anisotropic fabric pattern, while such fabric has rarely been accounted for in SRM slope stability analysis. In this study, a two-phase rotated anisotropy random field simulation method is proposed to model these spatial variations simultaneously. The proposed approach is then integrated with the finite element method (FEM) to study the impacts of soil volume fraction and bedding dip angle (i.e., rotated anisotropy) on the probability of failure (<i>p</i><sub>f</sub>) and failure mode of SRM slopes. It is found that considering only spatially varying layouts can underestimate <i>p</i><sub>f</sub> by up to 97% compared to considering both spatially variable properties and layouts. The increase in soil volume fraction significantly improves <i>p</i><sub>f</sub> and the likelihood of deep failure. The bedding dip angle greatly influences <i>p</i><sub>f</sub>, yet deep failure remains dominant across different bedding dip angles. Furthermore, the failure mode of SRM slopes is more sensitive to the changes in soil volume fraction than to bedding dip angle.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 4","pages":"1113-1125"},"PeriodicalIF":3.4,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142832152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing Static Liquefaction Triggers in Tailings Dams Using the Critical State Constitutive Models CASM and NorSand 基于临界状态本构模型CASM和NorSand的尾矿坝静态液化触发因素评估

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-12-13 DOI: 10.1002/nag.3914

Erick Rógenes, Ian Torras Paes, Bruno Guimarães Delgado, Rafael Jabur Bittar, Alessandra dos Santos Gomes, Alessandro Cirone, Alomir H. Fávero Neto, Leandro Lima Rasmussen

{"title":"Assessing Static Liquefaction Triggers in Tailings Dams Using the Critical State Constitutive Models CASM and NorSand","authors":"Erick Rógenes, Ian Torras Paes, Bruno Guimarães Delgado, Rafael Jabur Bittar, Alessandra dos Santos Gomes, Alessandro Cirone, Alomir H. Fávero Neto, Leandro Lima Rasmussen","doi":"10.1002/nag.3914","DOIUrl":"10.1002/nag.3914","url":null,"abstract":"<div>\u0000 \u0000 <p>Static liquefaction-induced failure in tailings dams can result in extensive economic and environmental damage. In practice, the use of constitutive models capable of capturing this phenomenon and assessing structures susceptible to liquefaction is increasing. Numerous constitutive models exist and have been applied to model static liquefaction of tailings materials, but the extent of the influence exerted by the choice of constitutive model on analysis outcomes remains to be determined. This study addresses this uncertainty by employing the Clay and Sand Model (CASM) and NorSand models to analyze the well-documented case of the B1 dam failure in Brazil. Initially, a back analysis of the failure was conducted, and further analyses were carried out by simulating hypothetical triggers: crest loading and increased gravity. The influence of the adopted constitutive model on results was analyzed through the failure mechanisms generated, stress paths, and levels of disturbances necessary to trigger liquefaction. Both models produced compatible failure mechanisms, with slight differences observed in the level of disturbance required to trigger liquefaction. The results obtained from the B1 case indicate that the most important aspect related to the constitutive model in assessing structures susceptible to static liquefaction lies in the constitutive model's capacity to represent the sudden strength loss due to pore pressure generation, while the particular formulations employed in each method tend to be a secondary consideration in the analysis.</p></div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 4","pages":"1092-1112"},"PeriodicalIF":3.4,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142820745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Semi-Analytical Study of Pile–Soil Interaction on a Permeable Pipe Pile Subjected to Rheological Consolidation of Clayey Soils 粘性土流变固结作用下透水管桩桩土相互作用半解析研究

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-12-12 DOI: 10.1002/nag.3915

Lun Hua, Yi Tian, Yue Gui, Wenlian Liu, Wenbing Wu

{"title":"Semi-Analytical Study of Pile–Soil Interaction on a Permeable Pipe Pile Subjected to Rheological Consolidation of Clayey Soils","authors":"Lun Hua, Yi Tian, Yue Gui, Wenlian Liu, Wenbing Wu","doi":"10.1002/nag.3915","DOIUrl":"10.1002/nag.3915","url":null,"abstract":"<div>\u0000 \u0000 <p>Permeable pipe pile, a novel pile foundation integrating drainage and bearing functions, improves the bearing capacity of the pile foundation by accelerating the consolidation of the soil around the pile. In this study, a mathematical model is established to simulate the consolidation of surrounding clayey soils and the pile–soil interaction, where the rheological properties of the soils are described with the fractional derivative-based Merchant model, and the impeded drainage boundary is used to simulate the pile–soil interfacial drainage boundary. Corresponding solutions for pile–soil relative displacement, skin friction, and axial force on the pile shaft are derived by means of semi-analytical methods, and they are validated by comparing with experimental results and numerical simulation results. Based on the proposed semi-analytical model, a series of parametric analyses are conducted to investigate the influences of fractional orders, viscosity coefficients, pile–soil interface parameters, and pile-head loads on the pile–soil interaction characteristics. It is observed that during the transition stage, the axial force increases linearly with depth in the plastic segment, and then increases nonlinearly in the elastic segment until it decreases after reaching the neutral plane. In the elastic segment, the axial force on the pile shaft for a given time increases with the increases in the fractional order or the pile–soil interface parameter, but decreases with the increase of viscosity coefficient.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 3","pages":"1058-1074"},"PeriodicalIF":3.4,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142815772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Modeling on Small-Strain Stiffness and Viscoelastic-Viscoplastic Characteristic of Soft Soils 软土小应变刚度和粘弹粘塑性特性数值模拟

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-12-12 DOI: 10.1002/nag.3918

Zhi Yong Ai, Gan Lin Gu, Jun Tao Yuan

{"title":"Numerical Modeling on Small-Strain Stiffness and Viscoelastic-Viscoplastic Characteristic of Soft Soils","authors":"Zhi Yong Ai, Gan Lin Gu, Jun Tao Yuan","doi":"10.1002/nag.3918","DOIUrl":"10.1002/nag.3918","url":null,"abstract":"<div>\u0000 \u0000 <p>The behavior of soft soils distributed in coastal areas usually exhibits obvious time-dependent behavior after loading. To reasonably describe the stress-strain relationship of soft soils, this paper establishes a viscoelastic-viscoplastic small-strain constitutive model based on the component model and the hardening soil model with small-strain stiffness (HSS model). First, the Perzyna's viscoplastic flow rule and the modified Hardin–Drnevich model are introduced to derive a one-dimensional incremental Nishihara constitutive equation. Next, the flexibility coefficient matrix is utilized to extend the one-dimensional model to three-dimensional conditions. Then, by combining the HSS elastoplastic theory with the component model, the viscoelastic-viscoplastic small-strain constitutive model is subsequently established. To implement the proposed model for numerical analysis, the corresponding UMAT subroutine is developed using Fortran. After comparing the results of numerical simulations with those of existing literature, the reliability of the constitutive model and the program written in this paper is verified. Finally, numerical examples are designed to further analyze the effects of small-strain parameters and viscoelastic-viscoplastic parameters on the time-dependent behavior of soft soils.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 4","pages":"1079-1091"},"PeriodicalIF":3.4,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142815821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Macroscopic and Mesoscopic Damage Characteristics and Energy Evolution Laws of Rock Mass With Double Arcuate Fractures Under Uniaxial Compression 单轴压缩下双弓形裂隙岩体宏细观损伤特征及能量演化规律

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-12-11 DOI: 10.1002/nag.3917

Qingyang Ren, Senlin Gao, Songqiang Xiao, Xin Meng, Zhongyao Li

{"title":"Macroscopic and Mesoscopic Damage Characteristics and Energy Evolution Laws of Rock Mass With Double Arcuate Fractures Under Uniaxial Compression","authors":"Qingyang Ren, Senlin Gao, Songqiang Xiao, Xin Meng, Zhongyao Li","doi":"10.1002/nag.3917","DOIUrl":"10.1002/nag.3917","url":null,"abstract":"<div>\u0000 \u0000 <p>In order to reveal the influence of double arc-shaped fissure dip angles on the macro-micro failure and energy evolution laws of rock masses, a numerical model of red sandstone was firstly established using the PFC2D. Moreover, mesoscopic parameters of the numerical model were calibrated based on the uniaxial compression tests on intact and single straight fissure red sandstone specimens. Then, particle flow simulation tests of red sandstone with different arc-shaped fissure dip angles were carried out. The results show that the peak strength and elastic modulus both increase with the increase of arc-shaped fissure dip angle <i>α</i>, exhibiting an oblique shear-tensile failure pattern. Six types of cracks evolved during the instability and rupture of the rock mass with double arc-shaped fissures. The macroscopic fissures in the rock mass ultimately penetrate along the extension direction of the arc-shaped fissures. As the arc-shaped fissure dip angle <i>α</i> increases, the crack evolution is positively correlated with the acoustic emission (AE) of the specimen. When approaching instability failure, the AE ringing count rapidly increases. There is a critical angle limit inflection point for the total energy absorbed by the rock between 60° and 75°, with a total energy increase of about 54%. During instability failure, it is dominated by dissipative energy, with elastic energy as a supplement. This article derived a damage constitutive model of red sandstone with different arc-shaped fissure dip angles, revealing the damage laws of red sandstone under different arc-shaped fissure dip angles.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 3","pages":"1038-1057"},"PeriodicalIF":3.4,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142809228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theoretical Study on Consolidation of Slurry Treated by PHDs-VP Considering Clogging Effect and Vacuum Preloading Process 考虑堵塞效应和真空预压的ph - VP料浆固结理论研究

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-12-11 DOI: 10.1002/nag.3912

Kang Yang, Mengmeng Lu, Yuanjie Liu, Xueyu Geng, Zhiwei Ding

{"title":"Theoretical Study on Consolidation of Slurry Treated by PHDs-VP Considering Clogging Effect and Vacuum Preloading Process","authors":"Kang Yang, Mengmeng Lu, Yuanjie Liu, Xueyu Geng, Zhiwei Ding","doi":"10.1002/nag.3912","DOIUrl":"10.1002/nag.3912","url":null,"abstract":"<div>\u0000 \u0000 <p>Prefabricated horizontal drains combined with vacuum preloading (PHDs-VP) have addressed the shortcomings of prefabricated vertical drains combined with vacuum preloading (PVDs-VP), beginning to emerge as a popular method for dredged slurry treatment. However, theoretical research on PHDs-VP consolidation is relatively scarce. This study proposes a novel analytical model for predicting the consolidation behavior of the slurry treated by PHDs-VP. This model treats the PHDs layer as a continuous drainage layer. Analytical solutions considering the clogging effect and the vacuum preloading process have been derived. The correctness and applicability of the proposed model have been verified through degeneration analysis and comparison with laboratory experimental data. Subsequently, an in-depth sensitivity analysis of parameters has been conducted to assess the influence on consolidation. The research findings indicate that the clogging effect significantly reduces the consolidation rate, while the influence of the increasing rate in vacuum pressure is relatively minor. Additionally, increasing the slurry filling rate and the PHDs layout density can both accelerate soil consolidation. These findings offer significant guidance for the implementation of PHDs-VP method in engineering.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 3","pages":"1024-1037"},"PeriodicalIF":3.4,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142809225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cyclic Lateral Response of Large-Diameter Monopiles in Soft Clays Using Bounding Surface-Based Analytical p-y Curves 基于边界面解析p - y曲线的软粘土大直径单桩循环侧向响应

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-12-11 DOI: 10.1002/nag.3911

Xinglei Cheng, Jinhui Yang, Piguang Wang, Mohamed Hesham El Naggar, Mingyuan Wang, Qun Lu, Rui Sun

{"title":"Cyclic Lateral Response of Large-Diameter Monopiles in Soft Clays Using Bounding Surface-Based Analytical p-y Curves","authors":"Xinglei Cheng, Jinhui Yang, Piguang Wang, Mohamed Hesham El Naggar, Mingyuan Wang, Qun Lu, Rui Sun","doi":"10.1002/nag.3911","DOIUrl":"10.1002/nag.3911","url":null,"abstract":"<div>\u0000 \u0000 <p>The p-y curve method provides a relatively simple and efficient means for analyzing the cyclic response of horizontally loaded piles. This study proposes a p-y spring element based on a bounding surface p-y model, which can be readily implemented in Abaqus software using the user-defined element (UEL) interface. The performance of these p-y spring elements is validated by simulating field tests of laterally loaded piles documented in the literature. The developed spring element effectively replicates the nonlinear hysteresis, displacement accumulation, and stiffness degradation observed in soft clay. Subsequently, a finite element model of a large-diameter monopile is established using the proposed spring element. A comprehensive numerical investigation is conducted to explore both the monotonic and cyclic responses of large-diameter monopiles in soft clays. The results are presented and discussed in terms of pile head load–displacement curves, the evolution of rotation angles at the mud surface, and cyclic p-y curves. Additionally, empirical formulas are proposed to predict the evolution of cumulative rotation angles and peak bending moments under both one-way and two-way cyclic loading conditions. The results provide valuable insights into the mechanism of pile–soil interaction under lateral cyclic loading.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 3","pages":"1004-1023"},"PeriodicalIF":3.4,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142809227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of Asymmetric Face Failure and Limit Support Pressure During Curved Tunnels Excavation in Sandy Soils 砂土弯曲隧道开挖非对称工作面破坏及极限支护压力研究

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-12-11 DOI: 10.1002/nag.3910

Mengxi Zhang, Xue Zhang

{"title":"Study of Asymmetric Face Failure and Limit Support Pressure During Curved Tunnels Excavation in Sandy Soils","authors":"Mengxi Zhang, Xue Zhang","doi":"10.1002/nag.3910","DOIUrl":"10.1002/nag.3910","url":null,"abstract":"<div>\u0000 \u0000 <p>With the continuous urban development, tunnels are increasingly designed with curved alignments to avoid existing structures and to make better use of the underground space. However, these tunnels are usually subjected to complex forces, and current research on the curved tunnels face stability remains incomplete. This paper presents a detailed face stability analysis of curved tunnels, both analytically and numerically. Initially, a series of 3-D numerical simulations are performed to investigate the spatially asymmetric failure pattern of the soil ahead of the curved tunnel face and the stress transfer mechanism of the soil arching effect during the excavation process is explored. Subsequently, based on traditional limit equilibrium methods and the results from numerical simulations, an improved wedge-prism model and corresponding theoretical calculation formulas for the limit support pressure are proposed. The validity of the improved model is confirmed through illustrative analyses, while sensitivity analyses are conducted on the impacts of soil internal friction angle, structural depth ratio, and tunnel curvature radius on the limit support pressure. This study can aid in the calculation of the stability of the tunnel face and the limit support pressure in curved tunnel excavation.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 3","pages":"991-1003"},"PeriodicalIF":3.4,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142809226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0