Computers and Geotechnics最新文献_第7页

Compaction quality assessment of road subgrades using explainable deep graph learning framework 利用可解释深度图学习框架评估路基压实质量

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2024-10-09 DOI: 10.1016/j.compgeo.2024.106795

Feng Jia, Jie Zhang, Jianjun Shen, Liangfan Wu, Sinuo Ma

{"title":"Compaction quality assessment of road subgrades using explainable deep graph learning framework","authors":"Feng Jia, Jie Zhang, Jianjun Shen, Liangfan Wu, Sinuo Ma","doi":"10.1016/j.compgeo.2024.106795","DOIUrl":"10.1016/j.compgeo.2024.106795","url":null,"abstract":"<div><div>Compaction-quality assessment based on machine learning is an attractive topic in road construction research. However, existing methods do not consider the structural information of data when predicting the compaction degree. Thus, an explainable deep graph learning framework is proposed for the intelligent compaction quality assessment of road subgrades. In this method, a multi-domain analysis is first used to extract different indicators from the vibration signals of a vibratory roller. Second, the indicators for the different sampling points are constructed as graph structure data. Finally, an alternating graph-regularized regression network (AGRN) is developed to learn features from the graph data and aggregate the features using a regressor to predict the compaction degree. Through experimental verification, the proposed method displays an improved generalization ability and a high prediction accuracy when compared with other methods. Moreover, Shapley additive explanations (SHAP) are introduced to measure the marginal contributions of indicators for predicting the compaction degree in compaction quality assessments.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142420502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Spatially mixed implicit–explicit schemes in hydro-mechanically coupled soil dynamics 水力机械耦合土壤动力学中的空间混合隐式-显式方案

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2024-10-09 DOI: 10.1016/j.compgeo.2024.106811

Patrick Staubach , Jan Machaček

引用次数: 0

CFD-DEM modeling of seepage in foam-conditioned soil 泡沫调节土壤中的 CFD-DEM 渗流模型

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2024-10-09 DOI: 10.1016/j.compgeo.2024.106818

Rongkai Zeng , Shuying Wang , Yang Zhang , Tongming Qu

{"title":"CFD-DEM modeling of seepage in foam-conditioned soil","authors":"Rongkai Zeng , Shuying Wang , Yang Zhang , Tongming Qu","doi":"10.1016/j.compgeo.2024.106818","DOIUrl":"10.1016/j.compgeo.2024.106818","url":null,"abstract":"<div><div>Soil conditioning with foam agents can reduce the permeability of virgin soils and mitigate the risk of uncontrollable mud gushing during the excavation of Earth Pressure Balanced (EPB) shield machines. This study employs a combined Computational Fluid Dynamics (CFD) − Discrete Element Method model (DEM) method to simulate the seepage process in foam-conditioned excavated soil. Through discovering migration patterns of foam particles and their effects on macroscopic permeability under various hydraulic gradients, this study unveils the micro-mechanisms governing the permeability of foam-modified soil. Results indicate the feasibility of using hydraulic gradient amplification to examine foam particle migration channels and permeability changes. Furthermore, the findings show that the initial stabilization period in the seepage experiment arises from a dynamic equilibrium between the inflow and outflow of foam in the lower layers. In the upper and middle soil layers, foam migration paths show resilience to water pressure during the initial stage of seepage, but become increasingly responsive to the pressure when migration is hindered. The migration paths of the foam particles in the lower layers remain consistent across different water pressures. The migration speed of individual foam particles is determined by both water pressure and pore structure, while the overall migration speed of the foam increases as water pressure rises.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

One-dimensional non-isothermal diffusion model for organic pollutant in an unsaturated composite liner considering the degradation effect 考虑降解效应的有机污染物在非饱和复合衬垫中的一维非等温扩散模型

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2024-10-09 DOI: 10.1016/j.compgeo.2024.106807

Wenhao Jiang , Shangqi Ge , Jiangshan Li

{"title":"One-dimensional non-isothermal diffusion model for organic pollutant in an unsaturated composite liner considering the degradation effect","authors":"Wenhao Jiang , Shangqi Ge , Jiangshan Li","doi":"10.1016/j.compgeo.2024.106807","DOIUrl":"10.1016/j.compgeo.2024.106807","url":null,"abstract":"<div><div>In this article, a one-dimensional non-isothermal diffusion model for organic pollutant in an unsaturated composite liner (comprising a geomembrane and an unsaturated compacted clay liner (CCL)) considering the degradation effect is established, which also includes the impacts of temperature on diffusion-related parameters, and employs a water content and pore-water pressure head relationship equation that better matches the experimental results. Subsequently, this model is addressed through a finite-difference technique, and its reasonableness is proved by comparing with the experiment measurements and two other calculation approaches. Following this, the analyses suggest that the diffusion coefficients’ change induced by a rising temperature accelerates the diffusion rate, whereas such an alteration on partitioning coefficients has an opposite effect. Furthermore, the evaluation reveals that the non-isothermal state caused by an increasing upper temperature overall lowers the anti-fouling performance. The unsaturated composite liner’s barrier function is weakened by an increment in residual water content of CCL, but enhanced by unsaturated layer thickness. It is also detected that the degradation effect should be considered if the degradation half-life ≤ 100 years. Lastly, a simplified approach for assessing the unsaturated composite liner’s barrier performance is presented, which can provide guidance for its engineering design in a non-isothermal scenario.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142420501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

APD: An automated parameter determination system based on in-situ tests APD：基于现场测试的自动参数确定系统

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2024-10-07 DOI: 10.1016/j.compgeo.2024.106799

Islam Marzouk , Ronald Brinkgreve , Arny Lengkeek , Franz Tschuchnigg

{"title":"APD: An automated parameter determination system based on in-situ tests","authors":"Islam Marzouk , Ronald Brinkgreve , Arny Lengkeek , Franz Tschuchnigg","doi":"10.1016/j.compgeo.2024.106799","DOIUrl":"10.1016/j.compgeo.2024.106799","url":null,"abstract":"<div><div>In-situ testing has numerous applications in geotechnical engineering. The interpretation of in-situ test results includes soil stratification and determination of soil parameters. This paper presents an automated parameter determination framework that aims to determine constitutive model parameters based on in-situ tests. The ongoing research project relies on a graph-based approach for determining the parameters. The framework has two main attributes: transparency and adaptability. Transparency is achieved by illustrating how a certain parameter was computed. Adaptability is ensured by allowing users to incorporate their expertise into the framework. The system currently determines parameters based on three main workflows that utilize the results of cone penetration tests, dilatometer tests, and shear wave velocity measurements. This study employs the three main workflows to determine soil parameters for one of the Norwegian GeoTest Sites. Additionally, the connection between the parameter determination system and finite element analysis is discussed, where the parameters for the Modified Cam Clay model are evaluated. The framework is valuable in the early stages of projects, providing detailed soil information when soil data is limited. Ongoing research aims to assess the accuracy of the derived soil and constitutive model parameters and to expand the system’s capabilities by including additional in-situ tests.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142420500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Physics-guided neural network-based framework for 3D modeling of slope stability 基于物理引导神经网络的斜坡稳定性三维建模框架

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2024-10-05 DOI: 10.1016/j.compgeo.2024.106801

Zilong Zhang , Bowen Wang , Zhengwei Li , Xinyu Ye , Zhibin Sun , Daniel Dias

{"title":"Physics-guided neural network-based framework for 3D modeling of slope stability","authors":"Zilong Zhang , Bowen Wang , Zhengwei Li , Xinyu Ye , Zhibin Sun , Daniel Dias","doi":"10.1016/j.compgeo.2024.106801","DOIUrl":"10.1016/j.compgeo.2024.106801","url":null,"abstract":"<div><div>Physics-informed neural networks (PINN) have gradually attracted attention in the field of geotechnical engineering. This paper proposes a novel PINN-based framework for the three-dimensional (3D) stability analysis of soil slopes. Based on the fundamental theorem of plasticity and limit analysis, the partial differential equations (PDE) with regard to slope collapse are derived and integrated into the physics-guided loss function. A kinematically admissible failure mechanism that rigorously satisfies the Mohr-Coulomb associated flow rule is obtained by minimizing the loss function, thereby circumventing complex mathematical calculations. The discrete points generated by PINN are selected and refined through a series of procedures to represent the failure block of slopes using a two-dimensional matrix. The entire training process of the PINN-based framework is conducted without the need for any labeled data. The resulting discretized failure mechanism is meshfree and capable of accommodating spatially discrete data. A validation exercise is performed to verify the proposed framework by comparing it with the classical 3D rotational failure mechanism. To further consider the impact of external excitation on slope stability, a hybrid PINN framework is developed to assess the stability of slopes subjected to complex external environments. In addition to the PINN to generate a failure mechanism, a parallel PINN is employed to acquire the corresponding spatially discrete data of specified external excitations. The hybrid PINN framework for seismic stability assessment of slopes is demonstrated by way of example, indicating favorable feasibility and applicability of the developed approach. The proposed PINN-based framework provides innovative and promising avenues for 3D slope stability analysis.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142420597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

A hybrid approach combining UD and GA-CV-SVM to evaluate shear performance in high asphalt concrete core 结合 UD 和 GA-CV-SVM 的混合方法评估高沥青混凝土芯材的剪切性能

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2024-10-05 DOI: 10.1016/j.compgeo.2024.106812

Yong Li , Yanlong Li , Lifeng Wen , Weimei Li , Ye Zhang , Peng Bu , Xinjian Sun

{"title":"A hybrid approach combining UD and GA-CV-SVM to evaluate shear performance in high asphalt concrete core","authors":"Yong Li , Yanlong Li , Lifeng Wen , Weimei Li , Ye Zhang , Peng Bu , Xinjian Sun","doi":"10.1016/j.compgeo.2024.106812","DOIUrl":"10.1016/j.compgeo.2024.106812","url":null,"abstract":"<div><div>The shear effect on high asphalt concrete core is significant. However, studies on the reliability of 100-meter-scale cores against shear damage remain limited. A key challenge in this research field is establishing the control criteria for the core and improving the computational efficiency of implicit limit state function (LSF). Additionally, the impact of material parameter uncertainty on the shear failure reliability of the core during the dam construction and impoundment stages remains unclear. To address this, a safety evaluation method based on time discretization was proposed, combining uniform design (UD), K-fold cross-validation (K-CV), and genetic algorithm (GA) to optimize the support vector machines (SVM). The core parameters of 52 asphalt concrete-core rockfill dams (ACCRDs) were analyzed, with the statistical values of the basic variables considered in determining the reliability index. The theoretical derivation of the critical shear failure safety index established a stability formula to assess the safety state of the dam core. The significance parameters were identified, and the sample points were generated at each stage using UD, and the Support Vector Regression (SVR) was applied to reconstruct the LSF, and reliability was calculated through the checking point method.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142420498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

An efficient nonlocal integral method based on the octree algorithm 基于八叉树算法的高效非局部积分法

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2024-10-05 DOI: 10.1016/j.compgeo.2024.106796

Dechun Lu , Yaning Zhang , Xin Zhou , Fanping Meng , Cancan Su , Xiuli Du

{"title":"An efficient nonlocal integral method based on the octree algorithm","authors":"Dechun Lu , Yaning Zhang , Xin Zhou , Fanping Meng , Cancan Su , Xiuli Du","doi":"10.1016/j.compgeo.2024.106796","DOIUrl":"10.1016/j.compgeo.2024.106796","url":null,"abstract":"<div><div>The nonlocal integral method typically requires a very high computing cost to search neighborhood integration points for calculating the nonlocal variable, which limits its application in large-scale problems. This paper proposes an efficient nonlocal integral method based on the octree algorithm, in which the integration point information is stored in the tree data structure to accelerate the search task. Firstly, the fundamental principles and implementation details of using the octree algorithm to search neighborhood integration points are described in detail. Subsequently, a Mohr-Coulomb nonlocal damage plastic model is presented as the application object of the proposed method. The model is implemented further in the ABAQUS using the octree-based nonlocal method and the return mapping algorithm enhanced by a line search method. Finally, two typical boundary value problems are simulated to verify the effectiveness and to assess the computational efficiency of the proposed nonlocal method. For the given test environment, the octree algorithm can achieve up to 100 times speedup at the integration point level compared to the traversal algorithm, and the developed efficient nonlocal method can achieve up to 7.9 times speedup at the boundary value problem level compared to the original nonlocal method.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142420503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

CFD–DEM comparison of slurry infiltration in laboratory column tests and in real-world tunnelling 实验室柱状试验和实际隧道工程中泥浆渗透的 CFD-DEM 比较

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2024-10-05 DOI: 10.1016/j.compgeo.2024.106816

Jiayuan Liu, Kevin J. Hanley

{"title":"CFD–DEM comparison of slurry infiltration in laboratory column tests and in real-world tunnelling","authors":"Jiayuan Liu, Kevin J. Hanley","doi":"10.1016/j.compgeo.2024.106816","DOIUrl":"10.1016/j.compgeo.2024.106816","url":null,"abstract":"<div><div>Slurry infiltration and filter cake formation are critical for excavation surface stability in slurry shield tunnelling. Laboratory column tests are frequently adopted to study macroscopic infiltration. However, these tests, in a vertical orientation and confined by an impermeable cylindrical boundary, may not be a good representation of horizontal infiltration into an unbounded stratum in real-world tunnelling. In this paper, a more realistic slurry pressure balance (SPB) tunnelling model was created to overcome the limitations of simulated laboratory column tests. Coupled computational fluid dynamics (CFD)–discrete element method (DEM) numerical simulations were carried out to study the slurry infiltration into sand for this model and compare the results with the conventional laboratory column test model. Both models produced the same types of filter cakes. The SPB tunnelling model yielded larger infiltration distances and ranges, but a lower normalised permeability in the sand region in front of the tunnel face. The fluid pressure within this region dissipated much faster in the SPB tunnelling model, resulting in rapid velocity decreases and a faster infiltration process. Although the SPB tunnelling model is more representative of real-world tunnelling, the conventional laboratory column test is conservative, producing similar types of filter cakes over a longer timeframe.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142420497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Numerical study on the hydro-thermal-chemical–mechanical coupling mechanism in sulfate saline soil under freeze–thaw cycles 冻融循环条件下硫酸盐盐土的水热-化学-力学耦合机制数值研究

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2024-10-04 DOI: 10.1016/j.compgeo.2024.106803

Jing Zhang , Yuanming Lai , Mingyi Zhang , Shuangyang Li , Dongqing Li , Zhemin You

{"title":"Numerical study on the hydro-thermal-chemical–mechanical coupling mechanism in sulfate saline soil under freeze–thaw cycles","authors":"Jing Zhang , Yuanming Lai , Mingyi Zhang , Shuangyang Li , Dongqing Li , Zhemin You","doi":"10.1016/j.compgeo.2024.106803","DOIUrl":"10.1016/j.compgeo.2024.106803","url":null,"abstract":"<div><div>Water-heat-salt migration inevitably leads to instability and failure in roads, slopes, channels, and tower foundations in sulfate saline soil regions undergoing freeze–thaw (F-T) cycles, severely compromising the safety and stability of long-term operations in cold region engineering. F-T tests were performed on sulfate saline soil under different F-T cycle modes to investigate the impact of F-T cycle frequency and cooling duration on water-salt transfer and soil deformation. This study revealed the coupled mechanism of water-heat-salt-mechanics in sulfate saline soil under variable F-T conditions and established a hydro-thermal-chemical–mechanical coupled model. The study indicates that the progression of salt spatiotemporal distribution during F-T cycles are initial salt accumulation in the frozen zone near the freezing front, an upward shift of the salt peak, salts redistribution as subflorescence and efflorescence, and surface salt accumulation. These factors are closely related to soil deformation. Longer cooling durations promote salt accumulation near the freezing front, while shorter durations and more F-T cycles encourage salt migration to the surface layer. The model’s reliability is validated by the good agreement between calculated results and experimental data. Understanding these multiphase-multifield coupling mechanism in sulfate saline soils can help address engineering issues associated with salt-frost heave.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142420595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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