Pub Date : 2019-01-01DOI: 10.18690/actageotechslov.16.2.2-11.2019
P. Ghosh, Aloke Pal
Skirted foundations are assumed to be a wise selection in offshore geotechnical engineering. In this paper the bearing-capacity factors for a vertically loaded skirted strip foundation resting on uniform c-φ soil were obtained using an upper-bound limit analysis. The analysis is performed by choosing a kinematically admissible failure mechanism comprising multiple triangular rigid blocks. The effect of the embedment depth of the skirts on the bearing capacity is studied based on the dimensionless embedment ratio Df/Bf. A detailed parametric study is carried out by varying the Df/Bf ratio and φ for both the smooth and rough surface of the skirts. The results obtained from the present theoretical analysis are compared with the available theoretical and experimental data reported in the literature. Priyanka Ghosh (corresponding author) Indian Institute of Technology, Kanpur, Department of Civil Engineering Kanpur – 208 016, India E-mail: priyog@iitk.ac.in Alok Pal Indian Institute of Technology, Kanpur, Department of Civil Engineering Kanpur – 208 016, India E-mail: alok.besu2188@gmail.com
{"title":"Undrained bearing capacity of a skirted strip foundation using upper-bound limit analysis","authors":"P. Ghosh, Aloke Pal","doi":"10.18690/actageotechslov.16.2.2-11.2019","DOIUrl":"https://doi.org/10.18690/actageotechslov.16.2.2-11.2019","url":null,"abstract":"Skirted foundations are assumed to be a wise selection in offshore geotechnical engineering. In this paper the bearing-capacity factors for a vertically loaded skirted strip foundation resting on uniform c-φ soil were obtained using an upper-bound limit analysis. The analysis is performed by choosing a kinematically admissible failure mechanism comprising multiple triangular rigid blocks. The effect of the embedment depth of the skirts on the bearing capacity is studied based on the dimensionless embedment ratio Df/Bf. A detailed parametric study is carried out by varying the Df/Bf ratio and φ for both the smooth and rough surface of the skirts. The results obtained from the present theoretical analysis are compared with the available theoretical and experimental data reported in the literature. Priyanka Ghosh (corresponding author) Indian Institute of Technology, Kanpur, Department of Civil Engineering Kanpur – 208 016, India E-mail: priyog@iitk.ac.in Alok Pal Indian Institute of Technology, Kanpur, Department of Civil Engineering Kanpur – 208 016, India E-mail: alok.besu2188@gmail.com","PeriodicalId":50897,"journal":{"name":"Acta Geotechnica Slovenica","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67766831","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}
Pub Date : 2019-01-01DOI: 10.18690/actageotechslov.16.2.39-49.2019
M. Martín-Ruiz, S. Madrid, J. Alvarellos, J. Delgado, J. Goicolea, S. Madrid, S. Madrid
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
{"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":"1 1","pages":""},"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}
Pub Date : 2019-01-01DOI: 10.18690/ACTAGEOTECHSLOV.16.1.30-42.2019
F. E. Sánchez, M. B. Aguado, S. Melentijevic, Proes Consultores
{"title":"Stress-strain behavior of blue marls from the Guadalquivir river basin in Spain","authors":"F. E. Sánchez, M. B. Aguado, S. Melentijevic, Proes Consultores","doi":"10.18690/ACTAGEOTECHSLOV.16.1.30-42.2019","DOIUrl":"https://doi.org/10.18690/ACTAGEOTECHSLOV.16.1.30-42.2019","url":null,"abstract":"","PeriodicalId":50897,"journal":{"name":"Acta Geotechnica Slovenica","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67766594","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}
Pub Date : 2019-01-01DOI: 10.18690/ACTAGEOTECHSLOV.16.1.70-78.2019
Yu Song, Jin Yang, H. Xiang, Bo Zhou
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
{"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":"1 1","pages":""},"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}
Pub Date : 2019-01-01DOI: 10.18690/ACTAGEOTECHSLOV.16.1.79-95.2019
A. C. Taiba, Y. Mahmoudi, L. Hazout, W. Baille, M. Belkhatir
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
{"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":"1 1","pages":""},"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}
Pub Date : 2019-01-01DOI: 10.18690/actageotechslov.16.2.50-65.2019
Rajesh Prasad Shukla, R. Jakka
{"title":"Determination and prediction of the ultimate bearing capacity of a strip footing on undrained clayey slopes","authors":"Rajesh Prasad Shukla, R. Jakka","doi":"10.18690/actageotechslov.16.2.50-65.2019","DOIUrl":"https://doi.org/10.18690/actageotechslov.16.2.50-65.2019","url":null,"abstract":"","PeriodicalId":50897,"journal":{"name":"Acta Geotechnica Slovenica","volume":"61 21 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67766894","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}
A high-speed-railway (HSR) embankment intersection with ground fissures is a commonly encountered engineering problem. This paper reports a series of experiments conducted on a reduced scale to investigate the influence of different ground-fissure intersection angles on a HSR embankment. The tests revealed the presence of an integrated bend-tension failure mode in the embankment’s reinforced concrete (RC) slab as a result of activities assoJianbing Peng (corresponding author) Chang'an University, Key Laboratory of Western China's Mineral Resources and Geological Engineering of Ministry of Education
{"title":"Experimental analysis of a high-speed-railway embankment intersecting steep ground fissures at different angles","authors":"Peng Jianbing, Zhongjie Fan, Cong Liu, Huang Qiangbing, Jigen Liu, Hongyu Ren, Wu Ming, Zhen-jiang Meng","doi":"10.18690/ACTAGEOTECHSLOV.16.1.13-29.2019","DOIUrl":"https://doi.org/10.18690/ACTAGEOTECHSLOV.16.1.13-29.2019","url":null,"abstract":"A high-speed-railway (HSR) embankment intersection with ground fissures is a commonly encountered engineering problem. This paper reports a series of experiments conducted on a reduced scale to investigate the influence of different ground-fissure intersection angles on a HSR embankment. The tests revealed the presence of an integrated bend-tension failure mode in the embankment’s reinforced concrete (RC) slab as a result of activities assoJianbing Peng (corresponding author) Chang'an University, Key Laboratory of Western China's Mineral Resources and Geological Engineering of Ministry of Education","PeriodicalId":50897,"journal":{"name":"Acta Geotechnica Slovenica","volume":"92 2 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67766497","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}
Pub Date : 2019-01-01DOI: 10.18690/actageotechslov.16.1.53-69.2019
M. Ahlinhan, E. Adjovi, Valéry K. Doko, H. Tigri
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
尽管在实践规范中指导有限，但超大直径单桩被广泛用于海上风力涡轮机的基础。在本研究中，进行了三维有限元(FE)分析，以确定单桩在联合荷载下嵌入砂土的静力能力。数值模型采用了考虑土壤刚度应力依赖性的硬化土模型(HSM)，并用已发表的离心机试验结果进行了校准。在对不同长径比单桩进行参数化研究的基础上，建立了不同地基砂相对密度下单桩极限状态和可使用极限状态的横向荷载-弯矩相互作用图。此外，将Carter and Kulhawy(1992)和Shadlou and Bhattacharya(2016)考虑桩径影响的单桩体系初始刚度公式与有限元结果进行对比。马克思·费迪南德·阿赫林汉(通讯作者)E-mail: ahlinhan@yahoo.fr Edmond Codjo Adjovi国立科技大学工程学系贝宁共和国阿波美土木工程系数学
{"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":"1 1","pages":""},"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}
Pub Date : 2019-01-01DOI: 10.18690/actageotechslov.16.2.77-89.2019
M. Örnek, A. Atahan, Y. Türedi, M. M. Erdem, Murat Buyuk
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
护栏是被动道路约束系统(RRS)，用于路边和中间，以提高道路安全。在桩嵌入深度不足的情况下，土驱动桩可能无法发挥预期的作用，并且设计无法为撞击车辆提供足够的安全性。一般情况下，钢质护栏的高度在1600 ~ 2400mm不等。然而，没有考虑到护栏所在土壤的特性。换句话说，无论土壤类型如何，都要使用固定深度的护栏。目前，钢护栏系统的桩嵌入深度(PED)是根据强土体特性来确定的。这些设计的碰撞性能可能不适用于土壤条件比测试条件弱的地方。在本研究中，对土嵌桩进行了一系列现场冲击试验，以确定M. Musab Erdem Iskenderun技术大学的最佳PED，工程与自然科学学院，土木工程系31200,Iskenderun, Hatay，土耳其，E-mail: musab.erdem@iste.edu.tr Murat bysy k sabancul大学，集成制造技术研发中心34956，伊斯坦布尔，土耳其，E-mail: muratbuyuk@sabanciuniv.edu
{"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":"1 1","pages":""},"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}
Pub Date : 2018-12-01DOI: 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.
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
{"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":" ","pages":""},"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}
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