Geotextiles and Geomembranes最新文献_第5页

Analytical assessment of pullout capacity of reinforcements in unsaturated soils 分析评估非饱和土壤中钢筋的抗拉能力

IF 4.7 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-06-28 DOI: 10.1016/j.geotexmem.2024.06.003

Mahmoud Ghazavi, Abbas Mahboobi

{"title":"Analytical assessment of pullout capacity of reinforcements in unsaturated soils","authors":"Mahmoud Ghazavi, Abbas Mahboobi","doi":"10.1016/j.geotexmem.2024.06.003","DOIUrl":"https://doi.org/10.1016/j.geotexmem.2024.06.003","url":null,"abstract":"<div>The effective interaction mechanisms in the pullout resistance of reinforcements include skin friction mobilized at the soil-solid surface, soil-soil shear resistance, and compressive resistance created against transverse elements. The third component is obtained from passive lateral pressure (LPM) or bearing capacity (BCM) methods. An analytical solution is proposed to determine the pullout capacity of geocell, geogrid, and strengthened geogrids embedded in ordinary and unsaturated soils. For unsaturated soils, the effective stress approach was employed. The solution-predicted results were compared with those obtained from large-scale pullout tests reported in the literature. Results indicated that considering LPM for 2D and 3D reinforcements better agrees with experimental results. The mobilized frictional rib-soil interfaces and the soil-soil shear resistance components generally contribute more to the pullout capacity of the geocell and geogrid, respectively. For the extensibility represented by <math><mrow><msub><mi>m</mi><mrow><mi>p</mi><mi>i</mi><mspace></mspace></mrow></msub></mrow></math> and flexibility of geocell denoted by <math><mrow><msub><mi>α</mi><mrow><mi>p</mi><mi>i</mi></mrow></msub></mrow></math>, the values of <math><mrow><msub><mi>m</mi><mrow><mi>p</mi><mi>i</mi><mspace></mspace></mrow></msub></mrow></math> = 1, 0.7, and 0.3 for the first, second, and third row of geocell, <math><mrow><msub><mi>α</mi><mrow><mi>p</mi><mi>i</mi></mrow></msub><mo>=</mo></mrow></math> 0.4 for the first row of geocell and 0.25 for the second and subsequent rows are suggested to be considered. Parametric studies showed that the optimum transverse rib spacing is over 50 times the equivalent rib thickness (Beq).</div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141484904","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

3D DEM investigation of shear behavior and interaction mechanism of woven geotextile-sand interfaces 编织土工织物与沙界面的剪切行为和相互作用机制的三维 DEM 研究

IF 4.7 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-06-24 DOI: 10.1016/j.geotexmem.2024.06.004

Yafei Jia , Jun Zhang , Yewei Zheng

{"title":"3D DEM investigation of shear behavior and interaction mechanism of woven geotextile-sand interfaces","authors":"Yafei Jia , Jun Zhang , Yewei Zheng","doi":"10.1016/j.geotexmem.2024.06.004","DOIUrl":"10.1016/j.geotexmem.2024.06.004","url":null,"abstract":"<div>This paper presents a numerical study on the investigation of microscopic mechanism governing the interaction of woven geotextile and angular sand employing the 3D discrete element method (DEM). The surface texture and tensile properties of the geotextile were simulated using overlapping spherical particles, and the angular sand was simulated using rigid blocks. The DEM models were fully calibrated based on previous experimental data. The shear and dilation zones of sand near the interface were quantitatively determined based on particle displacement gradients. Analysis of contact forces was conducted to explain the microscopic mechanism behind the macroscopic strength evolution. The influence of geotextile surface roughness on the shear strength of the geotextile-sand interface is also discussed. The results show that the failure mode of the woven geotextile-sand interface is a combination of particle sliding failure along the geotextile surface and shear failure of the sand within the shear zone above the interface. There is a rapid redistribution of contact forces prior to reaching peak shear resistance, and the average normal contact force within the shear zone remains relatively constant after the peak shear stress is achieved. A completely developed shear zone stabilizes soil deformation, typically after achieving the peak shear resistance.</div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141453290","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 new large-scale shear apparatus for testing geosynthetics-soil interfaces incorporating thermal condition 用于测试土工合成材料-土壤界面的新型大型热条件剪切设备

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-06-13 DOI: 10.1016/j.geotexmem.2024.06.002

Zhiming Chao , Gary Fowmes , Ahmad Mousa , Jiaxin Zhou , Zengfeng Zhao , Jinhai Zheng , Danda Shi

{"title":"A new large-scale shear apparatus for testing geosynthetics-soil interfaces incorporating thermal condition","authors":"Zhiming Chao , Gary Fowmes , Ahmad Mousa , Jiaxin Zhou , Zengfeng Zhao , Jinhai Zheng , Danda Shi","doi":"10.1016/j.geotexmem.2024.06.002","DOIUrl":"https://doi.org/10.1016/j.geotexmem.2024.06.002","url":null,"abstract":"<div>Geosynthetics-soil interfaces are exposed to varying temperatures coupled with complex stress states. Quantifying the mechanical response of the interface considering this combined influence of temperature and complex stress is always a huge challenge. This study proposes a new displacement and stress-loading static and dynamic shear apparatus that is capable of testing the geosynthetics-soil interfaces with high and low-temperature controlling function. The apparatus satisfactorily simulates monotonic and cyclic direct shear tests, and creep shear tests on geosynthetics-soil interfaces at temperatures ranging from −30 °C to 200 °C. To validate the functionality of this device, a series of temperature-controlled experiments were conducted on different types of interfaces (sand-geogrid interfaces, sand-textured geomembrane interfaces, sand-smooth geomembrane interfaces). The experimental results indicate that the apparatus can simulate static, dynamic, and creep shear loading on geosynthetics-soil interfaces in high and low temperature environments, and these can be measured reliably. It also manifests that temperature has a non-negligible influence on all mechanical interface responses. These findings highlight the significance and potential of the proposed apparatus and its practical implications.</div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141323593","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

Study of design parameters for staged-filled slurry treated by prefabricated horizontal drains under vacuum preloading 预制水平排水沟在真空预加载条件下处理分阶段填充泥浆的设计参数研究

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-06-12 DOI: 10.1016/j.geotexmem.2024.05.011

Ding-Bao Song , Yu Pan , Wen-Bo Chen , Pei-Chen Wu , Jian-Hua Yin

{"title":"Study of design parameters for staged-filled slurry treated by prefabricated horizontal drains under vacuum preloading","authors":"Ding-Bao Song , Yu Pan , Wen-Bo Chen , Pei-Chen Wu , Jian-Hua Yin","doi":"10.1016/j.geotexmem.2024.05.011","DOIUrl":"https://doi.org/10.1016/j.geotexmem.2024.05.011","url":null,"abstract":"<div>The method of using Prefabricated Horizontal Drains (PHDs) placed in layers under vacuum preloading can significantly speed up consolidation of staged-filled soil slurry. The PHDs can settle with the soil slurry and maintain their shape/pattern and dewatering capacity largely in comparison with Prefabricated Vertical Drains (PVDs). This study presents a field trial focused on treating dredged sediments using PHDs under vacuum preloading for land reclamation purposes. The staged filling involved in the field trial is analyzed using a finite strain consolidation model based on the piecewise-linear finite-difference method. Then, the effects of horizontal and vertical spacings of PHDs on settlement and vacuum consolidation rate are evaluated, considering various combinations of variables for staged-filled soil. It is found that for soils with low compressibility, the consolidation rate is primarily affected by the vertical spacing of PHD layers. For soils with higher compressibility, the consolidation rate is more significantly affected by the horizontal spacing of PHDs, and the final settlement after vacuum preloading is mainly influenced by the vertical spacing of PHD layers. This study provides practical recommendations for cost-effective design of horizontal and vertical spacings of PHDs in efficiently treating soil slurry with different compressibility and initial conditions.</div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141314010","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

Theoretical and experimental studies on air-inflated rubber dam anchored on sidewall of the rigid base 锚定在刚性基座侧壁上的充气橡胶坝的理论和实验研究

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-06-09 DOI: 10.1016/j.geotexmem.2024.05.010

Wei Guo , Xin Gao , Wenfang Guo , Yuxiao Ren , Lei Dai

引用次数: 0

Large-scale experimental and ANN modeling for dynamic interaction between vibrating and statically loaded foundations on geogrid-reinforced soil beds 土工格栅加固土层上振动地基与静力加载地基之间动态相互作用的大规模实验和 ANN 建模

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-06-08 DOI: 10.1016/j.geotexmem.2024.06.001

Gobinda Das, Priyanka Ghosh

{"title":"Large-scale experimental and ANN modeling for dynamic interaction between vibrating and statically loaded foundations on geogrid-reinforced soil beds","authors":"Gobinda Das, Priyanka Ghosh","doi":"10.1016/j.geotexmem.2024.06.001","DOIUrl":"https://doi.org/10.1016/j.geotexmem.2024.06.001","url":null,"abstract":"<div>The present investigation includes experimental and ANN-based intelligent modeling to explore the dynamic interference effect of closely positioned vibrating foundations placed on unreinforced and geogrid-reinforced soil beds. Large-scale field block vibration tests are conducted on isolated and interacting block footings placed on prepared foundation beds at IIT Kanpur, India. The dynamic interaction of various combinations of two-footing assemblies is examined where one footing (active footing) is excited with dynamic loadings, and the other (passive footing) carries static loadings. The tests involve three eccentric force settings for four distinct footing combinations at different clear spacings and reinforcement conditions. The responses of both footings are recorded at different loading frequencies. The interaction effect is presented in terms of the transmission ratio plotted against the frequency ratio. Additionally, an Artificial Neural Network (ANN) model is developed using the recorded field datasets to anticipate the dynamic interference effect. The predicted outcomes of the ANN model demonstrate promising agreement with the experimental findings reported in the literature, indicating the reliability and robustness of the intelligent model.</div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141294855","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

Behavior of surface loaded clay foundation reinforced by GESCs with lateral geosynthetic cushion under freeze-thaw cycles 表面荷载粘土地基在冻融循环下的行为--GESC 加固的粘土地基带有侧向土工合成材料垫层

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-06-05 DOI: 10.1016/j.geotexmem.2024.05.009

Zi-Ang Gu , Jian-Feng Chen , Chungsik Yoo

{"title":"Behavior of surface loaded clay foundation reinforced by GESCs with lateral geosynthetic cushion under freeze-thaw cycles","authors":"Zi-Ang Gu , Jian-Feng Chen , Chungsik Yoo","doi":"10.1016/j.geotexmem.2024.05.009","DOIUrl":"https://doi.org/10.1016/j.geotexmem.2024.05.009","url":null,"abstract":"<div>The efficiency of geosynthetics has been proven in stone column-reinforced foundations. In this paper, loading tests were conducted on three stone column-reinforced foundations, experiencing four freeze-thaw cycles. The effects of geosynthetic encasement and lateral reinforcement were investigated on the behavior of ordinary stone column (OSC) – reinforced and geosynthetic encased stone column (GESC) – reinforced foundation. The results showed that particles of OSCs spread into foundation soil during freezing and thawing, and top of OSCs were replaced by foundation soil. The temperature gradient along the depth in OSC-reinforced foundation was smaller than in GESC-reinforced foundations, resulting in a lower negative pore pressure at the beginning of freezing. However, it was found that geosynthetic encasement helped maintain the integrity of GESCs, and increased the stress concentration ratio (SCR) during thawing, which led to a lower excess pore pressure in GESC-reinforced foundations. The lateral reinforcement was also found to not only reduce the differential settlement between GESCs and soil during thawing, but also restrain the frost heave during freezing. The tensile membrane effect of lateral reinforcement redistributed the stress and the overburden pressure throughout the freeze-thaw process. More water moved upwards during freezing in the OSC-reinforced foundation, leading to a larger amount of frost heave. However, the moisture migration became complex in the OSC-reinforced foundation, as OSCs were damaged by freeze-thaw cycles.</div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141249985","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

Experimental and theoretical studies on deformation characteristics of Geosynthetic-Reinforced Soil (GRS) abutments induced by vertical loads 土工合成材料加固土（GRS）基墩在垂直荷载作用下的变形特性的实验和理论研究

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-06-03 DOI: 10.1016/j.geotexmem.2024.05.008

Qingming Wang , Chao Xu , Panpan Shen , Geye Li , Chongxi Zhao

{"title":"Experimental and theoretical studies on deformation characteristics of Geosynthetic-Reinforced Soil (GRS) abutments induced by vertical loads","authors":"Qingming Wang , Chao Xu , Panpan Shen , Geye Li , Chongxi Zhao","doi":"10.1016/j.geotexmem.2024.05.008","DOIUrl":"https://doi.org/10.1016/j.geotexmem.2024.05.008","url":null,"abstract":"<div>This study conducted five centrifuge model tests to investigate the deformation characteristics of the Geosynthetics Reinforced Soil (GRS) abutments under vertical loads, considering the setback distance ab and beam seat width B as two major influencing factors. Test results show that a linear correlation existed between the maximum lateral facing displacements DL and the maximum settlements at the top of the GRS abutments Dv. The ab and the B had different effects on the deformation characteristics of the GRS abutments as well as the relationship between the DL and the Dv. The total volumetric strains of the GRS abutments were smaller than 0.3% for all the cases investigated in this study, indicating that it was reasonable to use the assumption of zero-volume change for the deformation calculation of the GRS abutments. This study proposed an improved semi-empirical method to describe the relationship between the DL and the Dv. Centrifuge test results and data collected from the literature were used to validate the improved method. It was concluded that the improved method had the advantage of considering the effects of the ab and the B separately and therefore significantly improved the prediction accuracy of the deformations of the GRS abutments.</div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141240189","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

Investigation of load transfer mechanisms in reinforced cohesive soil embankments in case of subsidence using DEM 利用 DEM 研究沉降情况下加固粘性土路堤的荷载传递机制

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-05-25 DOI: 10.1016/j.geotexmem.2024.05.004

Maria Delli Carpini, Pascal Villard, Fabrice Emeriault

{"title":"Investigation of load transfer mechanisms in reinforced cohesive soil embankments in case of subsidence using DEM","authors":"Maria Delli Carpini, Pascal Villard, Fabrice Emeriault","doi":"10.1016/j.geotexmem.2024.05.004","DOIUrl":"https://doi.org/10.1016/j.geotexmem.2024.05.004","url":null,"abstract":"<div>Cavity formations by soil dissolution or underground collapses are at the origin of large surface subsidence that constitutes a risk of damage or failure for infrastructures. Soil reinforcement with geosynthetics positioned at shallow depth is an economical and functional solution to reduce the induced surface settlements. Previous research has mainly focused on the load transfer mechanism and the arching effect in cohesionless reinforced backfills when the cavity opens. Experimental and numerical studies dealing with cohesive soils are very rare, although this situation is commonly found in practice. To overcome this lack of knowledge, a numerical study based on Discrete Element Modelling is carried out to better understand the load transfer mechanisms that are mobilized in cohesive embankments prone to underground cavity opening. The results are compared with experimental data obtained on a small-scale laboratory model in terms of vertical and horizontal displacements of both soil and geosynthetics. The numerical results focus on the collapse mechanisms of the cohesive embankment, the load transfer mechanisms, the shape of the vertical load distribution acting on the geosynthetic layer, the strain and traction forces within the geosynthetic sheet.</div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0266114424000463/pdfft?md5=913dd8683eda01ffe1f7ac2ecd2c5c63&pid=1-s2.0-S0266114424000463-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141094910","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

Hydraulic conductivity of bentonite-polymer geosynthetic clay liners to aggressive solid waste leachates 膨润土-聚合物土工合成粘土衬里对侵蚀性固体废物沥滤液的导水性

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-05-24 DOI: 10.1016/j.geotexmem.2024.05.006

Dong Li , Hanrui Zhao , Kuo Tian

{"title":"Hydraulic conductivity of bentonite-polymer geosynthetic clay liners to aggressive solid waste leachates","authors":"Dong Li , Hanrui Zhao , Kuo Tian","doi":"10.1016/j.geotexmem.2024.05.006","DOIUrl":"https://doi.org/10.1016/j.geotexmem.2024.05.006","url":null,"abstract":"<div>Hydraulic conductivity of conventional mock sodium bentonite (Na–B) and bentonite-polymer (B–P) geosynthetic clay liners (GCLs) were evaluated with three synthetic leachates that are chemically representative of aggressive leachates from coal combustion product (CCR) (I = 3179 mM), mining waste (MW) (I = 2127 mM, pH = 2.0), and municipal solid waste incineration ash landfill (MSWI) (I = 2590 mM). The mock B–P GCLs were created by dry mixing bentonite with branched, linear, or crosslinked polymer. The polymer loading of mock B–P GCLs ranged from 3 to 15%. Comparative tests were also conducted with Na–B GCLs. The mock Na–B GCLs cannot maintain low hydraulic conductivity to aggressive CCR, MW, and MSWI leachates. Mock B–P GCLs with 10% branched polymer had low hydraulic conductivity (< 1.0 × 10−10 m/s) to synthetic MW and MSWI leachates at 20 kPa effective confining stress, whereas the hydraulic conductivity of mock B–P GCLs with 10% linear or crosslinked polymer ranged from 1.5 × 10−9 to 1.4 × 10−7 m/s. As the effective stress increased, the B–P GCLs branched polymer showed a faster decreasing trend than that of Na–B and B–P GCLs with linear or crosslinked polymer.</div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141094909","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