Geotextiles and Geomembranes最新文献_第9页

Seismic analysis of geosynthetic-reinforced soil walls in tiered configuration 分层配置的土工合成材料加固土墙的抗震分析

IF 4.7 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-07-18 DOI: 10.1016/j.geotexmem.2024.07.004

Bin Ge, Fei Zhang, Shuang Shu

{"title":"Seismic analysis of geosynthetic-reinforced soil walls in tiered configuration","authors":"Bin Ge, Fei Zhang, Shuang Shu","doi":"10.1016/j.geotexmem.2024.07.004","DOIUrl":"10.1016/j.geotexmem.2024.07.004","url":null,"abstract":"<div><p>Research on geosynthetic-reinforced soil (GRS) walls in tiered configurations is increasing gaining attention, with numerical methods being predominantly used in the past. In recent years, there has been a growing trend in conducting shaking table tests to further explore this area. However, traditional limit equilibrium (LE) methods are more preferred for design purposes. This study utilized a modified top-down approach, which is based on LE and pseudo-static methods to investigate the horizontal seismic force on the distribution of required tension along each reinforcement layer. The approach is initially extended from static analysis to seismic analysis for multitiered GRS walls. Parametric analyses are conducted to study the impacts that horizontal seismic coefficient, reinforcement length and spacing, internal friction angle of soil, height ratio of upper/lower tier, offset distance have on the internal stability of two-tiered GRS walls. Meanwhile, influences of wall batter and number of tiers on the critical offset distance for different seismic coefficients are assessed. Results indicate that the internal stability differs between the upper and lower tiers under seismic conditions, particularly with higher seismic forces, where the lower tier requires greater reinforcement tension to enhance its stability. Additionally, the critical offset distance grows with the increase in seismic coefficient, and it is sensitive to the internal friction angle of soil and the height ratio.</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":"52 5","pages":"Pages 1072-1085"},"PeriodicalIF":4.7,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141638889","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

DEM modeling of installation damage of geogrids under rockfill compaction condition 岩石填充压实条件下土工格栅安装损坏的 DEM 建模

IF 4.7 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-07-18 DOI: 10.1016/j.geotexmem.2024.07.006

Kaifeng Zeng , Guike Zhang , Yuting Zhang , Wei Jin , Farong Liang , Huabei Liu

{"title":"DEM modeling of installation damage of geogrids under rockfill compaction condition","authors":"Kaifeng Zeng , Guike Zhang , Yuting Zhang , Wei Jin , Farong Liang , Huabei Liu","doi":"10.1016/j.geotexmem.2024.07.006","DOIUrl":"10.1016/j.geotexmem.2024.07.006","url":null,"abstract":"<div><p>To investigate the installation damage of geogrids during roller compaction under rockfill condition, a three-dimensional discrete element model for roller compaction of geogrid-reinforced rockfill was established. The rockfill was modeled by irregular rigid block elements, while the geogrids were modeled by bonding basic ball elements. The model parameters were then calibrated by triaxial consolidated-drained and tensile tests. The displacements of the geogrids in three perpendicular directions, and the strength of the geogrids was analyzed. Additionally, the effects of compaction parameters on the installation damage of the geogrids were studied. The results showed that deformation of the geogrids was relatively small in the roller-driving direction but significant in the roller-axis and settlement directions. The damage modes of the geogrids could be mainly classified into three types: rib fracture, rib end fracture, and node fracture. The installation damage of the geogrid was derived mainly from its uneven deformation and fracture, and after roller compaction the strength distributions at different locations of the geogrid layer showed a normal distribution. Furthermore, the installation damage of the geogrids increased with increasing excitation force and compaction passes but decreased with increasing overlying rockfill thickness, roller velocity, and excitation frequency.</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":"52 5","pages":"Pages 1060-1071"},"PeriodicalIF":4.7,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141638888","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

Modifying ASTM E96 to assess water vapour transmission rates of geomembranes at high temperatures 修改 ASTM E96 以评估高温下土工膜的水蒸气透过率

IF 4.7 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-07-10 DOI: 10.1016/j.geotexmem.2024.07.001

Sadib Bin Kabir , Abdelmalek Bouazza , Mohammed Faizal

{"title":"Modifying ASTM E96 to assess water vapour transmission rates of geomembranes at high temperatures","authors":"Sadib Bin Kabir , Abdelmalek Bouazza , Mohammed Faizal","doi":"10.1016/j.geotexmem.2024.07.001","DOIUrl":"https://doi.org/10.1016/j.geotexmem.2024.07.001","url":null,"abstract":"<div><p>This paper presents a novel methodology for assessing water vapour transmission rates (WVTRs) through geomembranes across a wide temperature range, from 20 °C to 90 °C. This expands upon the existing ASTM E96 standard, limited to temperatures up to 32 °C. The study focused on 1.5 mm thick high-density polyethylene (HDPE) and polyvinyl chloride-ethylene interpolymer alloy (PVC-EIA) geomembranes. The WVTR results—0.15 g/m<sup>2</sup>h at 25 °C for PVC-EIA and 0.02 g/m<sup>2</sup>h at 30 °C for HDPE—align closely with values reported in existing literature for similar geomembranes at lower temperatures, validating the methodology proposed in this study. Under elevated temperatures, the WVTR of PVC-EIA increased significantly to 4.7 g/m<sup>2</sup>h at 90 °C, while HDPE showed a slower increase, reaching only 0.4 g/m<sup>2</sup>h at the same temperature. This disparity is attributed to polymer composition and behaviour differences under high temperatures. This study's methodology provides a dependable approach for accurately measuring WVTR, including high temperatures relevant to various applications where such data is currently lacking.</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":"52 5","pages":"Pages 1054-1058"},"PeriodicalIF":4.7,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141582447","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

Centrifuge model tests on performance of MSE walls with different facing types 采用不同面层类型的 MSE 墙体性能离心模型试验

IF 4.7 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-07-04 DOI: 10.1016/j.geotexmem.2024.06.005

Ting Li , Yi Zhong , Peng Xu , Guangqing Yang , Guanlu Jiang

{"title":"Centrifuge model tests on performance of MSE walls with different facing types","authors":"Ting Li , Yi Zhong , Peng Xu , Guangqing Yang , Guanlu Jiang","doi":"10.1016/j.geotexmem.2024.06.005","DOIUrl":"https://doi.org/10.1016/j.geotexmem.2024.06.005","url":null,"abstract":"<div><p>The role of wall facing is crucial in the design of MSE walls. This study employed two centrifuge model tests specifically designed to analyze walls with two distinct facing types: full-height panel facing and modular block facing. Additionally, surcharge loads were applied to these MSE walls to simulate real-world conditions. The findings from these tests revealed that MSE walls with full-height panel facing exhibited superior performance under the combined effects of self-weight and surcharge loads. The measured maximum horizontal displacements in walls with full-height panel facing and modular block facing were about 55% and 85% of those predicted from current design guidelines at EOS3, respectively. The influence of the surcharge loads on the reinforcement loads was found to be substantial for both wall types, especially for the case of model wall with modular block facing, where the reinforcement loads in the upper half of the wall increased by about 30% from EOS2 to EOS3. The insights garnered from this study contribute to a deeper and more nuanced understanding of the impact of facing types on the practical construction and design of MSE walls, offering valuable guidance for future engineering applications.</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":"52 5","pages":"Pages 1045-1053"},"PeriodicalIF":4.7,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141539740","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

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><p>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 <span><math><mrow><msub><mi>m</mi><mrow><mi>p</mi><mi>i</mi><mspace></mspace></mrow></msub></mrow></math></span> and flexibility of geocell denoted by <span><math><mrow><msub><mi>α</mi><mrow><mi>p</mi><mi>i</mi></mrow></msub></mrow></math></span>, the values of <span><math><mrow><msub><mi>m</mi><mrow><mi>p</mi><mi>i</mi><mspace></mspace></mrow></msub></mrow></math></span> = 1, 0.7, and 0.3 for the first, second, and third row of geocell, <span><math><mrow><msub><mi>α</mi><mrow><mi>p</mi><mi>i</mi></mrow></msub><mo>=</mo></mrow></math></span> 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 (<em>B</em><sub><em>eq</em></sub>).</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":"52 5","pages":"Pages 1024-1044"},"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><p>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.</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":"52 5","pages":"Pages 1011-1023"},"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><p>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.</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":"52 5","pages":"Pages 999-1010"},"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><p>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.</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":"52 5","pages":"Pages 985-998"},"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><p>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.</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":"52 5","pages":"Pages 956-974"},"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