Geotextiles and Geomembranes最新文献_第6页

Experimental study on dewatering and reinforcement of dredged slurry treated by PHDs-PVDs under step vacuum preloading 阶跃真空预加载条件下 PHDs-PVDs 处理疏浚泥浆的脱水和加固实验研究

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-05-22 DOI: 10.1016/j.geotexmem.2024.05.007

Kang Yang , Mengmeng Lu , Jinxin Sun , Ganbin Liu

{"title":"Experimental study on dewatering and reinforcement of dredged slurry treated by PHDs-PVDs under step vacuum preloading","authors":"Kang Yang , Mengmeng Lu , Jinxin Sun , Ganbin Liu","doi":"10.1016/j.geotexmem.2024.05.007","DOIUrl":"https://doi.org/10.1016/j.geotexmem.2024.05.007","url":null,"abstract":"<div><p>Nowadays, the utilization of prefabricated vertical drains (PVDs) or prefabricated horizontal drains (PHDs) in combination with vacuum preloading (VP) has emerged as a prevalent and effective strategy for treating dredged slurry. Nevertheless, both of these methods possess certain inherent limitations. In this study, three groups of parallel model experiments are conducted to compare the effectiveness of PVDs, PHDs and PHDs-PVDs under step VP in treating dredged slurry. Firstly, the water discharge, settlement and pore water pressure are monitored during the experiments. Then, the shear strength and water content of the soil at various locations after experiments are measured and the soil profiles at different cross sections are gauged. Additionally, soil excavation is conducted to evaluate the deformation characteristics of PHDs and PVDs. Finally, a scanning electron microscopy analysis is to assess the clogging of filter membranes. The results indicate that the proposed method can combine the advantages of both PHDs and PVDs, effectively enhancing the treatment effectiveness of the slurry. These findings elucidate the dewatering and reinforcement mechanism of PHDs-PVDs-VP and provide valuable insights for its practical engineering application.</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141084022","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

Evaluation of dynamic soil stress distribution in GRS bridge abutments subjected to cyclic loading 对承受循环荷载的 GRS 桥墩土壤动态应力分布进行评估

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-05-17 DOI: 10.1016/j.geotexmem.2024.05.003

Yafei Jia , Chuan-Bao Xu , Jun Zhang , Jun-jie Zheng , Yewei Zheng

{"title":"Evaluation of dynamic soil stress distribution in GRS bridge abutments subjected to cyclic loading","authors":"Yafei Jia , Chuan-Bao Xu , Jun Zhang , Jun-jie Zheng , Yewei Zheng","doi":"10.1016/j.geotexmem.2024.05.003","DOIUrl":"10.1016/j.geotexmem.2024.05.003","url":null,"abstract":"<div><p>Traffic-induced cyclic loading generates repetitive stresses and cumulative deformations on the GRS abutments, which affect the serviceability of GRS abutments. To evaluate the stress distribution of GRS abutments under cyclic traffic loading, this paper presents reduced-scale GRS abutment models constructed with sand backfill and geogrid reinforcements. The GRS abutment models were subjected to staged cyclic loading with different cyclic loading amplitudes to investigate the influences of cyclic loading amplitude, bridge superstructure load, and reinforcement vertical spacing on the dynamic soil stress distributions. The results indicate that the increase in residual stresses due to stress redistribution induced by cyclic loading is most pronounced at the top of the abutment, while there is little stress redistribution down to the foundation level. Increasing the static load of bridge superstructure or the amplitude of cyclic loading results in an increase in the incremental dynamic vertical soil stresses. Reinforcement vertical spacing does not significantly impact the incremental dynamic vertical soil stresses under cyclic loading, while the cyclic load has the most significant influence. Closer reinforcement vertical spacing could provide stronger lateral confinement, resulting in larger dynamic lateral soil stresses behind wall facing.</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141034560","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

Effects of bag characteristics and channel side slope on incipient motion of a single Geobag under river current loading 袋特性和河道边坡对单个土工袋在河流加载下的初始运动的影响

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-05-17 DOI: 10.1016/j.geotexmem.2024.05.001

Kendra White , Yuntong She , Knut Oberhagemann , Angela Thompson , Wenming Zhang

{"title":"Effects of bag characteristics and channel side slope on incipient motion of a single Geobag under river current loading","authors":"Kendra White , Yuntong She , Knut Oberhagemann , Angela Thompson , Wenming Zhang","doi":"10.1016/j.geotexmem.2024.05.001","DOIUrl":"https://doi.org/10.1016/j.geotexmem.2024.05.001","url":null,"abstract":"<div><p>Geobag stability has not been extensively studied under river current loading. In this study, the impacts of geobag characteristics (shape, bag material, and fill ratio of sand) and channel side slope (flat and 1V:2H) on a single geobag's stability were systematically investigated in a physical model to form the solid foundation for the research of group geobags. Overall, a geobag with a higher fill ratio, combined with the more flexible cloth material, was found to be the most stable. Critical Shields parameters were estimated between 0.0018 and 0.019, and the cross-sectional averaged flow velocity at incipient motion ranged from 0.49 m/s to 1.08 m/s. A shape factor was introduced to better describe the relationship between geobag characteristics and their stability on both riverbed configurations. Both the fill ratio and the bed side slope had higher importance on the geobag's stability compared to the relative depth, bag shape, and angle of flexibility.</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0266114424000438/pdfft?md5=3ca8d62e10099beee5196bdc6bc4f041&pid=1-s2.0-S0266114424000438-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141066780","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

Predictive model for the interface bond strength of geosynthetic-reinforced asphalt layers 土工合成材料加固沥青层界面粘结强度预测模型

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-05-17 DOI: 10.1016/j.geotexmem.2024.05.002

M.P.S. Silva , J.G. Zornberg , N.S. Correia

{"title":"Predictive model for the interface bond strength of geosynthetic-reinforced asphalt layers","authors":"M.P.S. Silva , J.G. Zornberg , N.S. Correia","doi":"10.1016/j.geotexmem.2024.05.002","DOIUrl":"10.1016/j.geotexmem.2024.05.002","url":null,"abstract":"<div><p>Innovation in the use of geosynthetics in roadway applications has resulted in the development of several different products, such as asphalt reinforcement geogrids and paving mats to minimize reflective cracks and limit moisture infiltration. For a proper performance of the reinforced asphalt systems, an adequate interface bond strength has proven to be crucial. However, the influence of the different paving interlayer characteristics, combined with tack coat types, and tack coat rates on the interface bond strength remains unclear. In this study, a comprehensive program of interface shear tests was conducted using Leutner shear device and laboratory-prepared reinforced asphalt specimens. The program involved eight geosynthetic types, two tack coat types, and three application rates. Results revealed that the geosynthetic type, tack coat type and rate, as well as the interactions among the parameters significantly affect interface bond strength. Multiple linear regression analysis indicated that geogrid aperture area, geosynthetic thickness, geotextile backing thickness, and the presence of bitumen coating are the most affecting parameters on bond strength. A predictive model for the bond strength based on geosynthetic parameters is presented. Based on literature results for specimens extracted from the field, the proposed predictive models were found to adequately predict interface bond strength.</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141052916","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

Field evaluation of moisture-suction regime and modulus of geosynthetic-reinforced soil wall with geo-composite side-drain 带土工复合材料侧排水沟的土工合成材料加固土墙的吸湿机制和模量现场评估

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-05-16 DOI: 10.1016/j.geotexmem.2024.05.005

Susit Chaiprakaikeow , Apiniti Jotisankasa , Washirawat Praphatsorn , Avishek Shrestha , Sawek Cheento , Sony Pramusandi , Pragith Chaisri , Shinya Inazumi

{"title":"Field evaluation of moisture-suction regime and modulus of geosynthetic-reinforced soil wall with geo-composite side-drain","authors":"Susit Chaiprakaikeow , Apiniti Jotisankasa , Washirawat Praphatsorn , Avishek Shrestha , Sawek Cheento , Sony Pramusandi , Pragith Chaisri , Shinya Inazumi","doi":"10.1016/j.geotexmem.2024.05.005","DOIUrl":"https://doi.org/10.1016/j.geotexmem.2024.05.005","url":null,"abstract":"<div><p>Geosynthetic-reinforced soil (GRS) walls built on hillslopes are more increasingly incorporated with geo-composite side drain in order to prevent the side-seepage entering the fill. This study evaluates the long-term moisture, pore-water pressure, and shear modulus, of a 6.5 m-high geogrid-reinforced soil wall in western Thailand. Through extensive field monitoring and in-situ spectral analysis of surface wave (SASW) tests, conducted during the Years 2018–2019, as well as laboratory tests, several key findings emerge. Free-free resonant frequency (FFR) testing of non-reinforced samples reveals the role of soil wetting and drying history and hysteresis in the stiffness-moisture relationship. In-situ pore-water pressure was found to be highest below the road surface near the wall face, decreasing with depth due to underdrainage, with values ranging from −27 to 5 kPa. The intersection of the side drainage board with the underdrain bottom layer shows the highest water content. In-situ and laboratory-derived soil-water retention curve (SWRC) were found to differ at greater depths. In unsaturated conditions, the in-situ small strain modulus of GRS appeared insensitive to suction stress below 10 kPa but was slightly affected under positive pore-water pressure, with multiple linear regression modeling indicating a dependency of stiffness on depth and pore-water pressure.</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141066779","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

Effects of rockfall shape on deformation performance of ground reinforced embankments subjected to lateral impact 落石形状对受到横向冲击的地面加固路堤变形性能的影响

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-05-16 DOI: 10.1016/j.geotexmem.2024.04.009

Liang Xiao , Liang Lu , Lanxing Li , Zongjian Wang , Katsuhiko Arai

{"title":"Effects of rockfall shape on deformation performance of ground reinforced embankments subjected to lateral impact","authors":"Liang Xiao , Liang Lu , Lanxing Li , Zongjian Wang , Katsuhiko Arai","doi":"10.1016/j.geotexmem.2024.04.009","DOIUrl":"https://doi.org/10.1016/j.geotexmem.2024.04.009","url":null,"abstract":"<div><p>Ground reinforced embankment (GRE) is an economical and efficient protection measure against rockfalls. In various design guidelines of ground reinforced embankments, the impact force of the rockfall is the principal factor, which is significantly affected by rockfall shape. This article conducts real scale tests and numerical tests to observe the external deformation behavior and the internal dynamic response of GREs subjected to lateral impact. Five shapes of the rockfalls corresponding to three contact types are set up in the tests. The experimental results show that the impact surface shapes of the rockfalls govern the penetration deformation patterns of the embankments, and the deformation extent of the disturbed soils. For different contact types between rockfalls and construction materials, the failure mode of the geosynthetics and the displacement distribution of the disturbed soils are distinguishing. The disturbed soils can be divided into two parts, the part surrounds the rockfall mainly expands laterally, and the rest is extruded and slips backward. Basically, the sharpness of the rockfall results in the deeper penetration and the smaller impact force. The influence of the rockfall shape needs to be carefully considered in the design of ground reinforced embankments.</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141066778","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

Influence of secondary reinforcements on the behavior of geosynthetic reinforced soil walls 二次加固对土工合成材料加固土墙行为的影响

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-05-03 DOI: 10.1016/j.geotexmem.2024.04.008

Fuxiu Li , Wenhao Guo , Yewei Zheng

{"title":"Influence of secondary reinforcements on the behavior of geosynthetic reinforced soil walls","authors":"Fuxiu Li , Wenhao Guo , Yewei Zheng","doi":"10.1016/j.geotexmem.2024.04.008","DOIUrl":"10.1016/j.geotexmem.2024.04.008","url":null,"abstract":"<div><p>This paper presents numerical simulations to investigate the influence of secondary reinforcements on the behavior of geosynthetic reinforced soil (GRS) walls under static loading. Simulations were conducted using a finite difference program to model an instrumented field GRS wall with secondary reinforcements. Simulated results are in good agreement with field measurements, including facing displacements, lateral soil stresses, and tensile strains of the primary and secondary reinforcement. A parametric study was then conducted to investigate the influences of secondary reinforcement length, backfill soil friction angle, and wall height on the static behavior of GRS walls with secondary reinforcements. Results indicate that the maximum facing displacement and the required reinforcement tensile force of primary reinforcements generally decrease with increasing secondary reinforcement length up to a critical value. The decreasing effect is more pronounced for GRS walls with lower soil friction angle and higher wall height. The K-stiffness method is overconservative for the calculation of required tensile force of primary reinforcements for GRS walls with secondary reinforcements, and the overestimation increases with increasing secondary reinforcement length. A design method that accounts for the influence of secondary reinforcements on the internal stability of GRS walls is provided.</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141038219","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

Plastic shakedown limit of geosynthetic reinforced coarse-grained soil: Experiments and prediction model 土工合成材料加固粗粒土的塑性动摇极限：实验和预测模型

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-04-30 DOI: 10.1016/j.geotexmem.2024.04.007

Dongjie Zhang , Kai Cui , Qionglin Li , Shangchuan Yang , Pangju Li , Zhifeng Wu , Xiaohao Li , Jinhong Xie

{"title":"Plastic shakedown limit of geosynthetic reinforced coarse-grained soil: Experiments and prediction model","authors":"Dongjie Zhang , Kai Cui , Qionglin Li , Shangchuan Yang , Pangju Li , Zhifeng Wu , Xiaohao Li , Jinhong Xie","doi":"10.1016/j.geotexmem.2024.04.007","DOIUrl":"https://doi.org/10.1016/j.geotexmem.2024.04.007","url":null,"abstract":"<div><p>This study aims to explore the accumulated behavior of reinforced coarse-grained soils through cyclic triaxial tests and to develop a prediction model for the plastic shakedown limit. Cyclic triaxial test results illustrate that the reinforced specimens, especially those incorporating geocells, demonstrate the lowest accumulated axial strain and the highest plastic shakedown limit when compared to unreinforced ones under identical cyclic loading. Additionally, the accumulated axial strain at the plastic shakedown limit for reinforced specimens is determined. This strain is then used to determine the additional confining pressure exerted by geogrid or geocell, employing a function proposed by Yang and Han. By integrating the additional confining pressure into the plastic shakedown criterion for unreinforced specimens, a prediction model for the plastic shakedown limit in reinforced specimens is ultimately established. The model's applicability and the accuracy of computed additional confining pressure values are validated using experimental data.</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141263966","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

Long-term hydraulic conductivity of bentonite-polymer geosynthetic clay liners 膨润土-聚合物土工合成粘土衬里的长期导水性

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-04-30 DOI: 10.1016/j.geotexmem.2024.04.006

Hanrui Zhao, Dong Li, Kuo Tian

{"title":"Long-term hydraulic conductivity of bentonite-polymer geosynthetic clay liners","authors":"Hanrui Zhao, Dong Li, Kuo Tian","doi":"10.1016/j.geotexmem.2024.04.006","DOIUrl":"https://doi.org/10.1016/j.geotexmem.2024.04.006","url":null,"abstract":"<div><p>Hydraulic conductivity tests were conducted on six bentonite-polymer (B–P) geosynthetic clay liners (GCLs) to investigate the effect of the slow cation exchange process and polymer elution on the long-term hydraulic conductivity of B–P GCLs. Tests were conducted up to 1458 days and as many as 443 pore volumes of flows (PVFs). Three B–P GCLs consist of linear polymer whereas the other three have crosslinked polymer. One sodium geosynthetic clay liner (Na–B GCL) was used as a control. Hydraulic conductivities (K<sub>6766</sub>) of B–P GCLs (5.4 × 10<sup>−12</sup> m/s to 3.7 × 10<sup>−11</sup> m/s) per ASTM D6766 were approximately 2-3 orders of magnitude lower than that of Na–B GCL (2.3 × 10<sup>−9</sup> m/s to 3.5 × 10<sup>−9</sup> m/s). Tests were continued after hydraulic and chemical equilibrium to investigate the long-term hydraulic conductivity of GCLs. Hydraulic conductivities of GCLs had an increasing trend after hydraulic and chemical equilibrium. The ratio of K<sub>L</sub>/K<sub>6766</sub> for B–P GCLs was 3.5–14.7, whereas ratio of K<sub>L</sub>/K<sub>6766</sub> for Na–B GCLs was 1.0–1.7. Total organic carbon (TOC) tests results confirmed that polymer elution occurred during the entire permeation process. The higher ratio of K<sub>L</sub>/K<sub>6766</sub> for B–P GCLs was attributed to the effect of polymer elution.</p></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":null,"pages":null},"PeriodicalIF":5.2,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141264079","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

Locating leaks in geomembrane-lined ponds using the electrical leak location method: Case histories 使用电气泄漏定位法确定土工膜衬砌池塘的泄漏位置：案例历史

IF 5.2 1区工程技术

Geotextiles and Geomembranes Pub Date : 2024-04-26 DOI: 10.1016/j.geotexmem.2024.04.003

Priscila Zidan , Matthew Kemnitz , Elisabeth Ritter

引用次数: 0