Indonesian Geotechnical Journal最新文献_第3页

Improvement of Ultra-Soft Soil Using Prefabricated Vertical Drain with Vacuum Preloading System: Laboratory Model Study 真空预压预制垂直排水管加固超软土的室内模型研究

Indonesian Geotechnical Journal Pub Date : 2023-08-30 DOI: 10.56144/igj.v2i2.38

P. Kefas, Andreas Erdian Wijaya, Ginanjar Khaq, Marcello Djunaidy

引用次数: 0

Identification of Vulnerability Due to the Pasaman M6.2 Earthquake on 25 February 2022 Using Satellite-Based Methods and Field Surveys 基于卫星方法和实地调查的2022年2月25日Pasaman 6.2级地震脆弱性识别

Indonesian Geotechnical Journal Pub Date : 2023-08-30 DOI: 10.56144/igj.v2i2.43

Edy Santoso, S. Pramono, Dadang Permana, M. Muzli, Bambang Setyo Prayitno, D. Karnawati

{"title":"Identification of Vulnerability Due to the Pasaman M6.2 Earthquake on 25 February 2022 Using Satellite-Based Methods and Field Surveys","authors":"Edy Santoso, S. Pramono, Dadang Permana, M. Muzli, Bambang Setyo Prayitno, D. Karnawati","doi":"10.56144/igj.v2i2.43","DOIUrl":"https://doi.org/10.56144/igj.v2i2.43","url":null,"abstract":"The Pasaman earthquake which occurred on 25 February 2022, with a magnitude of 6.2, caused casualties and infrastructure damage. Vulnerability identification determines the potential extent to which a system or unit tends to be damaged. Vulnerability identification in this study was carried out based on four vulnerability indicators, namely: rate of soil movement from satellite image processing, soil type classification based on Vs30, corrected isoseismal shakemap, and residential area maps. Each indicator, with their respective weightage, is then scored and summed to evaluate the vulnerability of areas in the vicinity of Pasaman earthquake. The processing of Sentinel-1 SLC satellite data using the advanced Differential Interferometric Synthetic Aperture Radar (DInSAR) produces a deformation rate around area of epicenter. Areas that have high vulnerability generally have a value of ground movement rate in the form of subsidence above 5 cm/year. These areas were predominantly residential and experienced significant damage during the earthquake. The soil type in these regions was classified as medium soil, and the intensity of shocks during the earthquake was categorized as VI MMI or higher. This study was conducted in the area near the epicenter of the Pasaman earthquake, such as in the district Pasaman, Bonjol, Pasaman, Palembaya, and Lubuk Basung. A study of disaster vulnerability identification is carried out to reduce the losses and minimizing the exposure of the population to disasters. The results of vulnerability identification can be used as part of education and literacy to reduce the risk of earthquake disasters.","PeriodicalId":439927,"journal":{"name":"Indonesian Geotechnical Journal","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130986333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coherence Alarm Implementation upon Post-Blast Impact in Open-Pit Mine 露天矿爆破后冲击相干报警实现

Indonesian Geotechnical Journal Pub Date : 2023-08-30 DOI: 10.56144/igj.v2i2.39

Muhammad Adib Izzuddin, A. Yudono, Deaz Dewantara

{"title":"Coherence Alarm Implementation upon Post-Blast Impact in Open-Pit Mine","authors":"Muhammad Adib Izzuddin, A. Yudono, Deaz Dewantara","doi":"10.56144/igj.v2i2.39","DOIUrl":"https://doi.org/10.56144/igj.v2i2.39","url":null,"abstract":"Slope Stability Radar (SSR) is a geotechnical monitoring tool, an array of sophisticated technology which is equipped with features that could be utilized in dynamic mining conditions. One of the features is called coherence and is used to track the impact of blasting activity around the research area. Historically, it has been recorded that fall-of-ground event (bench-scale failure) had occurred after blasting activity around the research area. These two events were recorded perfectly by utilizing coherence attribute measurement, including the time of event and the dimension of the impact area. Therefore, the application of a coherence alarm could be one of the solutions to provide an immediate response to track the blasting impact and provide periodic notification in case of the similar things occurred in the future. There are two alarm parameters in which required some adjustments due to the sensitivity of coherence attribute. The first one, is the alarm mask. It masks out the expected unwanted triggering alarm, such as vegetation area, ramp, machinery area, and mining infrastructures. The second one is the alarm threshold. It requires precise adjustment to maximize the alarm function during the rainfall event. The analysis resulting the threshold values advocated for the alarm are 12 contiguous pixels, 2 scans, and 0.6 coherence value. The alarm configuration parameters are then applied to the coherence alarm system. Notwithstanding that matter, the alarm configuration requires periodic adjustments, accompanied by the competencies of the person in charge for the SSR to be able to comprehensively understand the concept of coherence and its implementation in the research area.","PeriodicalId":439927,"journal":{"name":"Indonesian Geotechnical Journal","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114661879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laboratory Study of Grouting Method to Improve Loose Sand Against Liquefaction 松砂抗液化注浆方法的室内研究

Indonesian Geotechnical Journal Pub Date : 2023-08-30 DOI: 10.56144/igj.v2i2.68

Cindarto Lie, P. Rahardjo, I. Sadisun

引用次数: 0

Weathering of Volcanic Rocks in Baturappe Formation and Its Implications for Foundation Planning of Pamukkulu Dam, South Sulawesi, Indonesia 巴图拉佩组火山岩的风化作用及其对Pamukkulu大坝地基规划的启示

Indonesian Geotechnical Journal Pub Date : 2023-05-01 DOI: 10.56144/igj.v2i1.35

H. Pachri, R. Husain, A. Tonggiroh, M. Yusril

{"title":"Weathering of Volcanic Rocks in Baturappe Formation and Its Implications for Foundation Planning of Pamukkulu Dam, South Sulawesi, Indonesia","authors":"H. Pachri, R. Husain, A. Tonggiroh, M. Yusril","doi":"10.56144/igj.v2i1.35","DOIUrl":"https://doi.org/10.56144/igj.v2i1.35","url":null,"abstract":"The presence of weathered volcanic rocks in Pamukkulu area is important in determining the location and construction of the Pamukkulu main dam and plinth structure. In general, volcanic rocks have poor geotechnical characteristics due to varying degree of weathering, influence of groundwater, and systematic joints produced by cooling lava. This study aims to study the type and quality of weathered rock around the main dam and plinth area. First, mapping of surface geology was carried out. To evaluate the degree of weathering, rock resistivity data is used around the main dam area. Whereas for the plinth area, the bearing capacity of soil/rock is evaluated using Plate Bearing Test (PBT) and Standard Penetration Test (SPT). Bearing capacity obtained from PBT that were carried out on rock surface can be used to interpret rock weathering. In addition to SPT, the coring from rock drilling was also evaluated using Rock Quality Designation (RQD). It was found that the rock up to 20 m depth are of poor quality. It is recommended that the poor-quality rock is removed until moderately dense rock layer is found.","PeriodicalId":439927,"journal":{"name":"Indonesian Geotechnical Journal","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121516589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Contoured Surface, Excavation and Fill Construction to the 3D Settlement Analysis 轮廓面、开挖和填土施工对三维沉降分析的影响

Indonesian Geotechnical Journal Pub Date : 2023-05-01 DOI: 10.56144/igj.v2i1.20

M. Wijaya, D. P. Seourin, B. W. Anggoro, P. Rahardjo

{"title":"Effect of Contoured Surface, Excavation and Fill Construction to the 3D Settlement Analysis","authors":"M. Wijaya, D. P. Seourin, B. W. Anggoro, P. Rahardjo","doi":"10.56144/igj.v2i1.20","DOIUrl":"https://doi.org/10.56144/igj.v2i1.20","url":null,"abstract":"Settlement analysis is commonly done by assuming a horizontal soil surface with homogeneous soil layer. This assumption may no longer applicable when construction is conducted on mountainous area where there are a lot of hills or sloping area. Not only due to initial stress is no longer uniform throughout the entire construction area, excavation and fill activities which are required for the land preparation change the stress state of the soil. These problems are aggravated by the fact that soil layer in most of the mountainous area is not horizontal. In this paper, the effect of contoured surface and construction activities such as excavation and fill will be described by using a parking lot building project constructed at the mountainous area. The analysis is carried by using finite element analysis through MIDAS GTS NX. The result will then be compared with the finite element analysis without considering contoured surface and construction activities. The result shows that excavation and fill activities highly affect the settlement profile. For the area where excavation activities are carried, there will be less settlement which is expected due to an increase in over consolidated ratio. On the other hand, fill area experience more settlement due to lower fill modulus an increase in effective stress around the fill area.","PeriodicalId":439927,"journal":{"name":"Indonesian Geotechnical Journal","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123101984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 Strain-rate Effect in Two-dimensional Biaxial Test on Granular Material using Discrete Element Method 基于离散元法的颗粒材料二维双轴试验应变率效应研究

Indonesian Geotechnical Journal Pub Date : 2023-05-01 DOI: 10.56144/igj.v2i1.21

Ananda Putri Swastinitya, Jessica Sjah, James Jatmiko Oetomo

{"title":"Study of Strain-rate Effect in Two-dimensional Biaxial Test on Granular Material using Discrete Element Method","authors":"Ananda Putri Swastinitya, Jessica Sjah, James Jatmiko Oetomo","doi":"10.56144/igj.v2i1.21","DOIUrl":"https://doi.org/10.56144/igj.v2i1.21","url":null,"abstract":"Numerical study to investigate the effect of various strain rates on global friction angle in the sand has been performed. Granular material behavior is influenced by several factors, among others: pack configuration, grain macro and micro roughness, confinement pressure, loading rate, etc. Sand is a granular material composed of discrete particles that the most refined microscopic techniques are needed to study its mechanical properties. In Indonesia, research related to the Discrete Element Method is still very limited. The two-dimensional discrete element method is capable to calculate the motion and interparticle contacts of large number of small particles, and each particle is modeled as a rigid circular element. The study started with the validation of the DEM model using YADE. Particles with a local friction angle of 35° are arranged in a closed rectangular box (frictionless wall). The number of particles used in this model validation simulation is 1000 sphere-type particles with monodisperse particle gradations. The simulation was done by a drained biaxial test with confinement stress of 100 kPa, thereafter varying strain rate are applied. Based on the deviatoric stress–axial strain curve from YADE, the result can be depicted on the Mohr circle to obtain the value of the global friction angle. It is found that the different value of strain rate affects its global friction angle. Increasing the value of the strain rate can increase the material global friction angle, which increases the strain rate from 1% to 5%, 10%, 25%, and 50% will increase its global friction angle by 5%, 5%, 14%, and 18%, respectively.","PeriodicalId":439927,"journal":{"name":"Indonesian Geotechnical Journal","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122496553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modelling Study of Pile Group Foundation by Including Lateral Load in Clay Soil 粘土中考虑横向荷载的群桩基础模型研究

Indonesian Geotechnical Journal Pub Date : 2023-05-01 DOI: 10.56144/igj.v2i1.22

Muhammad Reza Imansyah, W. Prakoso, M. Orientilize

{"title":"Modelling Study of Pile Group Foundation by Including Lateral Load in Clay Soil","authors":"Muhammad Reza Imansyah, W. Prakoso, M. Orientilize","doi":"10.56144/igj.v2i1.22","DOIUrl":"https://doi.org/10.56144/igj.v2i1.22","url":null,"abstract":" Indonesia’s geographical condition causes earthquakes to occur more frequently. This study aims to investigate pile group response under earthquake loading by performing pushover analysis. Since clay soil is dominant and widespread in Indonesia, the study focused on pile group embedded in single layer of clay. The undrained shear strength (Su) parameters of the clay are varied from 20 kPa, to 100 kPa with 20 kPa intervals. The pile and soil were modelled by Beam-on-Nonlinear-Winkler-Foundation (BNWF), and the soil was presented as a series of Winkler springs using the nonlinear p-y method. The analysis was conducted with a finite element method (FEM) software, OpenSees. The pile was modelled as a fiber section, where the transversal and longitudinal reinforcement can be considered. The research found that the soil’s Su affects the ductility and formation of plastic hinge. Greater Su resulted in higher ductility and occurrence of plastic hinge. Higher Su was also found to increase the internal force experienced in the pile, as well as lead to higher group efficiency factor. There was no shear failure detected in the results, but bending failure happened at the lead pile in Su 100 kPa. The overturning moment phenomenon occurred on the pile group in Su 20 kPa and 100 kPa. For Su = 20 kPa, this phenomenon is caused by the middle pile and rear pile, which did not have optimal performance. Bending failure at the lead pile led to the phenomenonin Su 100 kPa.","PeriodicalId":439927,"journal":{"name":"Indonesian Geotechnical Journal","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129871888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction of SPT Value Based on Cone Penetration Test at Intake Water Project of Wolo River, Southeast Sulawesi 苏拉威西东南部Wolo河取水工程基于锥入试验的SPT值预测

Indonesian Geotechnical Journal Pub Date : 2023-05-01 DOI: 10.56144/igj.v2i1.33

U. Mangidi, A. Minmahddun, E. Ngii, R. Sriyani, Sulha

引用次数: 0

Sustainable Retaining Structure Incorporating Recycled Concrete Aggregate 采用再生混凝土骨料的可持续挡土结构

Indonesian Geotechnical Journal Pub Date : 2022-12-31 DOI: 10.56144/igj.v1i3.32

N. Gofar, A. Satyanaga

{"title":"Sustainable Retaining Structure Incorporating Recycled Concrete Aggregate","authors":"N. Gofar, A. Satyanaga","doi":"10.56144/igj.v1i3.32","DOIUrl":"https://doi.org/10.56144/igj.v1i3.32","url":null,"abstract":"Recycled concrete aggregate, that are easily found from destruction waste materials, has been used in the construction industry as an alternative for coarse aggregate component in concrete or as backfilling material in retaining structure. This paper presents the results of study on the use of the recycled concrete aggregate in the design of a newly developed sustainable retaining wall i.e., Geobarrier system (GBS). The GBS system was developed based on capillary barrier to limit water infiltration into the backfill soil while vegetative cover is used as provisions of the sustainable construction concept. Two types of concrete aggregate are used as components of capillary barrier i.e., fine and coarse aggregate. Laboratory test result shows the recycled concrete has similar mechanical and hydraulic properties as the natural aggregate; thus, can be used as alternative material. Stability and deformation analyses were carried out for 4 m high wall with 70o inclination. Results indicate that the retaining wall meet the requirement of the code of practice according to Eurocode 7 in terms of Factor of safety. Deformation analysis shows that the maximum deformation was only 4.5 mm at the bottom of the GBS wall.","PeriodicalId":439927,"journal":{"name":"Indonesian Geotechnical Journal","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123383730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0