Acta Geotechnica Slovenica最新文献_第4页

Undrained bearing capacity of a skirted strip foundation using upper-bound limit analysis 裙边条形基础不排水承载力的上限分析

IF 0.6 4区工程技术

Acta Geotechnica Slovenica Pub Date : 2019-01-01 DOI: 10.18690/actageotechslov.16.2.2-11.2019

P. Ghosh, Aloke Pal

引用次数: 3

Quartz-sand compressibility at high stresses and temperatures 石英砂在高应力和高温下的压缩性

IF 0.6 4区工程技术

Acta Geotechnica Slovenica Pub Date : 2019-01-01 DOI: 10.18690/actageotechslov.16.2.39-49.2019

M. Martín-Ruiz, S. Madrid, J. Alvarellos, J. Delgado, J. Goicolea, S. Madrid, S. Madrid

{"title":"Quartz-sand compressibility at high stresses and temperatures","authors":"M. Martín-Ruiz, S. Madrid, J. Alvarellos, J. Delgado, J. Goicolea, S. Madrid, S. Madrid","doi":"10.18690/actageotechslov.16.2.39-49.2019","DOIUrl":"https://doi.org/10.18690/actageotechslov.16.2.39-49.2019","url":null,"abstract":"The effects of temperature on the degree of grain crushing and the stress-strain response of a granular soil subjected to high stresses are a matter of interest for unconventional geomechanical projects. As a part of a research program on the thermo-hydro-mechanical-chemical compressibility of quartz sand from a heavy oil reservoir, we have conducted a series of oedometric tests under dry conditions, high stresses (up to 50 MPa) and constant temperatures, ranging from 25 to 250°C. Acoustic emissions were recorded throughout the tests, and SEM photomicrographs of sieved grain-size fractions before and after the experiments were analysed. The results show that the temperature has a negligible effect on the macroscopic compressibility, with similar oedometric curves for all the tests. Conversely, the acoustic-emission counts drop off, and changes in the particle size distribution are minor, though grains subjected at high temperature show incipient fractures attributed to subcritical cracking through stress-corrosion. Miriam Martín-Ruiz Universidad Politécnica de Madrid, UPM, Department of Continuum Mechanics and Structuress","PeriodicalId":50897,"journal":{"name":"Acta Geotechnica Slovenica","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67766848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Stress-strain behavior of blue marls from the Guadalquivir river basin in Spain 西班牙瓜达尔基维尔河流域蓝色泥灰岩的应力-应变行为

IF 0.6 4区工程技术

Acta Geotechnica Slovenica Pub Date : 2019-01-01 DOI: 10.18690/ACTAGEOTECHSLOV.16.1.30-42.2019

F. E. Sánchez, M. B. Aguado, S. Melentijevic, Proes Consultores

引用次数: 1

Bearing capacity of a single pile in saturated and drained clay 饱和排水粘土中单桩承载力研究

IF 0.6 4区工程技术

Acta Geotechnica Slovenica Pub Date : 2019-01-01 DOI: 10.18690/ACTAGEOTECHSLOV.16.1.70-78.2019

Yu Song, Jin Yang, H. Xiang, Bo Zhou

{"title":"Bearing capacity of a single pile in saturated and drained clay","authors":"Yu Song, Jin Yang, H. Xiang, Bo Zhou","doi":"10.18690/ACTAGEOTECHSLOV.16.1.70-78.2019","DOIUrl":"https://doi.org/10.18690/ACTAGEOTECHSLOV.16.1.70-78.2019","url":null,"abstract":"In this study the pile-soil interaction behavior of single, long, laterally loaded, embedded piles was investigated in both saturated and drained clay. The piles were hollow steel pipes with a diameter of 114 mm, a thickness of 2.5 mm, and a length-to-diameter ratio of 35. The piles were installed in inhomogeneous, saturated clay and laterally loaded to test their mechanical behaviors in saturated and drained soil. The soil-pile interaction force-displacement relationships (p-y curves) were calculated from the soil reaction and combined with the directly measured lateral displacement. The results indicate that the lateral load-bearing capacity of the pile in drained clay is up to 27% greater than the initial value. Furthermore, the ultimate soil resistance in both types of clay increases linearly with depth. There is a large difference between drained clay and unsaturated loose clay. The soil resistance in drained clay is nearly two times larger than that in unsaturated clay. This study also compares and analyzes the difference between the measured p-y curves and the back-calculated values. Y. Song et al.: Bearing capacity of a single pile in saturated and drained clay","PeriodicalId":50897,"journal":{"name":"Acta Geotechnica Slovenica","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67766686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 gradation on the mobilized friction angle for the instability and steady states of sand-silt mixtures: experimental evidence 级配对砂粉混合物失稳和稳态动员摩擦角的影响:实验证据

IF 0.6 4区工程技术

Acta Geotechnica Slovenica Pub Date : 2019-01-01 DOI: 10.18690/ACTAGEOTECHSLOV.16.1.79-95.2019

A. C. Taiba, Y. Mahmoudi, L. Hazout, W. Baille, M. Belkhatir

{"title":"Effects of gradation on the mobilized friction angle for the instability and steady states of sand-silt mixtures: experimental evidence","authors":"A. C. Taiba, Y. Mahmoudi, L. Hazout, W. Baille, M. Belkhatir","doi":"10.18690/ACTAGEOTECHSLOV.16.1.79-95.2019","DOIUrl":"https://doi.org/10.18690/ACTAGEOTECHSLOV.16.1.79-95.2019","url":null,"abstract":"This paper deals with a laboratory study of the influence of low-plastic-fines content and grading characteristics on the instability and steady-state friction angle of sand-silt mixtures under monotonic loading conditions. For this purpose, a series of compression undrained triaxial tests were carried out on Chlef sand (Algeria) mixed with low plastic fines (Ip=5%) ranging from Fc=0% to Fc=30%. The samples were prepared in the laboratory with the dry-funnel-pluviation method and subjected to three different confining pressures (Pc’=100 kPa, 200 kPa and 300 kPa). The obtained results indicate that the fines content, void ratio and gradation have a significant influence on the mobilized friction angle for the instability and steady state of the sand-silt mixtures and confirm the existence of simple correlations between the mobilized instability Wiebke Baille Bochum Ruhr University, Laboratory of Foundation Engineering, Soil and Rock Mechanics Bochum, Germany Mostefa Belkhatir University of Chlef, Laboratory of Material Sciences & Environment Algeria","PeriodicalId":50897,"journal":{"name":"Acta Geotechnica Slovenica","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67766696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 12

Determination and prediction of the ultimate bearing capacity of a strip footing on undrained clayey slopes 不排水粘土边坡条形基础极限承载力的确定与预测

IF 0.6 4区工程技术

Acta Geotechnica Slovenica Pub Date : 2019-01-01 DOI: 10.18690/actageotechslov.16.2.50-65.2019

Rajesh Prasad Shukla, R. Jakka

引用次数: 2

Experimental analysis of a high-speed-railway embankment intersecting steep ground fissures at different angles 某高速铁路路堤不同角度与陡地裂缝相交试验分析

IF 0.6 4区工程技术

Acta Geotechnica Slovenica Pub Date : 2019-01-01 DOI: 10.18690/ACTAGEOTECHSLOV.16.1.13-29.2019

Peng Jianbing, Zhongjie Fan, Cong Liu, Huang Qiangbing, Jigen Liu, Hongyu Ren, Wu Ming, Zhen-jiang Meng

引用次数: 3

Numerical analysis of the behaviour of a large-diameter monopile for offshore wind turbines 海上风力机大直径单桩性能的数值分析

IF 0.6 4区工程技术

Acta Geotechnica Slovenica Pub Date : 2019-01-01 DOI: 10.18690/actageotechslov.16.1.53-69.2019

M. Ahlinhan, E. Adjovi, Valéry K. Doko, H. Tigri

{"title":"Numerical analysis of the behaviour of a large-diameter monopile for offshore wind turbines","authors":"M. Ahlinhan, E. Adjovi, Valéry K. Doko, H. Tigri","doi":"10.18690/actageotechslov.16.1.53-69.2019","DOIUrl":"https://doi.org/10.18690/actageotechslov.16.1.53-69.2019","url":null,"abstract":"Very-large-diameter monopiles are widely used foundations for offshore wind turbines, despite the limited guidance in the codes of practice. In the present study, three-dimensional finite-element (FE) analyses were carried out to determine the static capacity of a monopile embedded in sand subjected to combined loading. A hardening soil model (HSM) accounting for the stress dependence of the soil stiffness was used for the numerical model, which was calibrated with the results of published centrifuge tests. Based on a parametric study for different length-to-diameter ratios of the monopile, lateral load-moment interaction diagrams for the ultimate limit state as well as for the serviceability limit state were developed for different relative densities of the foundation sand. Furthermore, the initial stiffness formulations for the monopile system by Carter and Kulhawy (1992), and Shadlou and Bhattacharya (2016) accounting for the effect of the pile diameter were compared to the FE results. Marx Ferdinand Ahlinhan (corresponding author) National University of Sciences, Technologies, Eng. and Mathematics, Department of civil engineering Abomey, Republic of Benin E-mail: ahlinhan@yahoo.fr Edmond Codjo Adjovi National University of Sciences, Technologies, Eng. and Mathematics, Department of civil engineering Abomey, Republic of Benin","PeriodicalId":50897,"journal":{"name":"Acta Geotechnica Slovenica","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67766643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Soil based design of highway guardrail post depths using pendulum impact tests 用摆锤冲击试验设计公路护栏桩深的土基设计

IF 0.6 4区工程技术

Acta Geotechnica Slovenica Pub Date : 2019-01-01 DOI: 10.18690/actageotechslov.16.2.77-89.2019

M. Örnek, A. Atahan, Y. Türedi, M. M. Erdem, Murat Buyuk

{"title":"Soil based design of highway guardrail post depths using pendulum impact tests","authors":"M. Örnek, A. Atahan, Y. Türedi, M. M. Erdem, Murat Buyuk","doi":"10.18690/actageotechslov.16.2.77-89.2019","DOIUrl":"https://doi.org/10.18690/actageotechslov.16.2.77-89.2019","url":null,"abstract":"Guardrails are passive road restraint systems (RRS) used at roadsides and medians to improve road safety. In the case of inadequate post embedment depth of soil driven posts may not function as intended and design cannot provide adequate safety nor security for the impacting vehicles. In general, the height of the steel guardrails varies between 1600 and 2400mm. However, the characteristics of the soil where the guardrails are driven are not taken into consideration. In other words, a constant depth of guardrail is used regardless of the type of soil. Post embedment depths (PED) in steel guardrail systems are currently determined based on strong soil properties. The crash performance of these designs may not be appropriate for locations where soil conditions are weaker than tested conditions. In this study, a series of field impact tests were performed on soil embedded posts to determine optimum PED for M. Musab Erdem Iskenderun Technical University, Faculty of Engineering and Natural Sciences, Civil Engineering Department 31200, Iskenderun, Hatay, Turkey E-mail: musab.erdem@iste.edu.tr Murat Büyük Sabancı University, Integrated Manufacturing Technologies R&A Center 34956, Istanbul, Turkey E-mail: muratbuyuk@sabanciuniv.edu","PeriodicalId":50897,"journal":{"name":"Acta Geotechnica Slovenica","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67766958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 4

Monitoring of the Belca rockfall Belca落石监测

IF 0.6 4区工程技术

Acta Geotechnica Slovenica Pub Date : 2018-12-01 DOI: 10.18690/ACTAGEOTECHSLOV.15.2.2-15.2018

A. Lazar, do.o. Litijska c. Ljubljana Geoservis, T. Beguš, M. Vulić, Dimičeva ulica Ljubljana Geotrias d.o.o.

{"title":"Monitoring of the Belca rockfall","authors":"A. Lazar, do.o. Litijska c. Ljubljana Geoservis, T. Beguš, M. Vulić, Dimičeva ulica Ljubljana Geotrias d.o.o.","doi":"10.18690/ACTAGEOTECHSLOV.15.2.2-15.2018","DOIUrl":"https://doi.org/10.18690/ACTAGEOTECHSLOV.15.2.2-15.2018","url":null,"abstract":"This paper reviews the monitoring of the rock block above the forest road of Belca Jepca near the village of Belca in the municipality of Kranjska Gora, Slovenia. A rockfall in part of the block occurred in autumn 2014. Both classic and some new measurement technologies were used. The new technologies were implemented according to new findings: an unmanned aircraft was used in the hazardous and hardly accessible areas of the observation, a terrestrial laser scanner was used for the comprehensive observation of the rock slopes and large cracks were observed with the installation of invar wires. The deformation analysis uses data between 2014 and 2017, among which airborne laser scanning (ALS) data from 2014 is included. The study also includes a comparison of the airborne laser scanning and the terrestrial laser scanning. used: surveys using wire extensometers, tachometry and terrestrial laser scanning (TLS). We have also acquired lidar data from the summer of 2014, using airborne laser scanning (ALS), showing the status of the area before the rockfall. The analysis of the acquired data covers the period from 2014 to 2017. The aim of this research was to assess the risk of another rockfall, as well as finding a solution to achieve the safety and transportability of the road. We have used both classic and the latest measurement technology. In hard-to-reach areas, an unmanned aircraft was used for the observation, while a terrestrial laser scanner was used to comprehensively monitor the","PeriodicalId":50897,"journal":{"name":"Acta Geotechnica Slovenica","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42545707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 6