International Journal of GEOMATE最新文献_第3页

SOIL STRENGTH ESTIMATION USING SCREW DRIVING SOUNDING TECHNIQUE FOR BANGKOK CLAY LAYERS 用螺旋掘进测深技术估算曼谷粘土层的土强度

International Journal of GEOMATE Pub Date : 2023-11-01 DOI: 10.21660/2023.111.3368

Suttisak Soralump

{"title":"SOIL STRENGTH ESTIMATION USING SCREW DRIVING SOUNDING TECHNIQUE FOR BANGKOK CLAY LAYERS","authors":"Suttisak Soralump","doi":"10.21660/2023.111.3368","DOIUrl":"https://doi.org/10.21660/2023.111.3368","url":null,"abstract":": The Screw Driving Sounding (SDS) test is an improvised and modified version of the Swedish Weight sounding (SWS) test. It is an emerging technique for in-situ field characterization used to estimate strength parameters from field tests directly, rather than by obtaining samples from the field and performing laboratory tests. For this research, several boreholes with standard penetration tests (SPTs) were conducted in the central region of Bangkok. SDS tests and field vane shear tests were performed in the vicinity of these boreholes. The undrained shear strengths from these tests were correlated separately to the SDS torque for marine and intertidal clay deposits. These equations differed slightly due to the difference in the shearing during failure of soil. These empirical equations are supported by an analytical equation that is derived based on the shearing mechanism of soil when the SDS screw head is penetrated into the soil. The correlation to estimate the SPT N was developed for stiff and hard alluvium clay, and compared with the equation from past research. Plots of SDS penetration energy with the consistency index showed that the clays could be clustered as two distinct groups based on their state and consistency. The SDS penetration resistance parameters were extremely affected by differences in the state of clay, which depended on the soil’s depositional history and depositional environment. The past researches were mainly empirical and dealt with sand or Japanese clay, formed in different depositional environment. Those equations do not give reliable results when applied directly to Bangkok clay. Hence, from this research, the undrained shear strength of soft clay and SPT N of stiff clay of the Bangkok deposit can be estimated directly from the equations.","PeriodicalId":47135,"journal":{"name":"International Journal of GEOMATE","volume":"260 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135273511","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

COMBINATION OF COIR FIBER WASTE AND COIR-WOOD ASH FOR EXPANSIVE CLAY STABILIZATION 椰壳纤维废渣与椰壳木灰复合用于膨胀粘土稳定

International Journal of GEOMATE Pub Date : 2023-11-01 DOI: 10.21660/2023.111.3976

Anita Widianti

{"title":"COMBINATION OF COIR FIBER WASTE AND COIR-WOOD ASH FOR EXPANSIVE CLAY STABILIZATION","authors":"Anita Widianti","doi":"10.21660/2023.111.3976","DOIUrl":"https://doi.org/10.21660/2023.111.3976","url":null,"abstract":": Coir waste randomly mixed into soil is an alternative material for strengthening expansive clay. However, these materials cannot reduce swelling due to water, requiring chemical stabilization. This study combined coir fibers with a mixture of coir-wood ash, the waste from the tofu home industry. No studies have utilized such a combination of structural materials. This study aims to examine the soaked and unsoaked California Bearing Ratio (CBR), swelling, unconfined compressive strength (UCS), and tensile strength of soil mixed with 0.75% fibers, and ash with varying content: 0%, 2%, 4%, 6%, 8%, and 10% of the mixture’s total weight. The curing time was seven days, 14 days, and 28 days. Testing refers to ASTM. The test results unveiled that the unsoaked CBR, soaked CBR, UCS, and tensile strength increased with rising ash content and curing time. A 6%–8% ash content produced the highest CBR, UCS, and tensile strength. On the other hand, by including a 6%–10% ash content, the swelling was decreased to 0%. Combining coir fiber and coir-wood ash has proven very effective for stabilizing expansive clays. In comparison to soils merely reinforced with fiber, the addition of coir-wood ash can eliminate swelling and increase the value of soaked CBR, UCS, tensile strength, and secant modulus up to 534%, 349%, 105%, and 824 %, respectively.","PeriodicalId":47135,"journal":{"name":"International Journal of GEOMATE","volume":"260 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135273512","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

EDGE DETECTION TECHNIQUE FOR SIMULTANEOUS MEASUREMENT OF TOTAL SUSPENDED SOLIDS AND TURBIDITY 同时测量总悬浮物和浊度的边缘检测技术

International Journal of GEOMATE Pub Date : 2023-11-01 DOI: 10.21660/2023.111.4003

Rijal Hakiki

引用次数: 0

ENVIRONMENTAL IMPACT EVALUATION ON INTERLOCKING COMPRESSED EARTH BRICK USING LIFE CYCLE ASSESSMENT 基于生命周期评价的联锁压缩土砖环境影响评价

International Journal of GEOMATE Pub Date : 2023-11-01 DOI: 10.21660/2023.111.3525

Nurul Shahadahtul Afizah Asman

{"title":"ENVIRONMENTAL IMPACT EVALUATION ON INTERLOCKING COMPRESSED EARTH BRICK USING LIFE CYCLE ASSESSMENT","authors":"Nurul Shahadahtul Afizah Asman","doi":"10.21660/2023.111.3525","DOIUrl":"https://doi.org/10.21660/2023.111.3525","url":null,"abstract":": Interlocking Compressed Earth Bricks (ICEB) is one of the alternative low carbon building materials replacing conventional brick. This study evaluates the embodied environmental impact of ICEB production in terms of embodied environmental implications for global warming potential (GWP). The life cycle assessment (LCA) analysis methodology was performed to identify and quantify the environmental performance of brick production from cradle-to-gate. Additionally, the emission in terms of GWP is analyzed using GaBi software. The system investigated includes raw materials and machinery used for brick production and transportation. Energy use and emissions are quantified, and the potential environmental effects are assessed. Sensitivity analyses were calculated on the percentage of cement content of 15% and 10% of the soil weight. The results show that the embodied carbon for 1 kg clay bricks in Sabah is 0.202 kgCO 2 -eq. Cement usage in brick production contributes the most significant environmental impact with carbon emissions of 0.172 kgCO 2 . The carbon emission of ICEB found a slight improvement compared to the conventional fired clay bricks (FCB). The result on sensitivity analyses found that the GWP reduced to 27-51% as the percentage of cement content was reduced at 10 and 15%. The findings proved that carbon emissions could be reduced with a lower cement usage in the mix design of ICEB.","PeriodicalId":47135,"journal":{"name":"International Journal of GEOMATE","volume":"47 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135320941","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

PROPOSED FORMULATION FOR PREDICTING DEFLECTIONS OF CFRP-RC BEAMS 提出了预测cfrp-rc梁挠度的公式

International Journal of GEOMATE Pub Date : 2023-11-01 DOI: 10.21660/2023.111.4050

Zaiimatul Ummah

引用次数: 0

GEOTECHNICAL ASSESSMENT OF SUBLAKE SLOPES AND LIQUEFACTION HAZARD IN LAKE TOBA, INDONESIA 印尼多巴湖亚丘边坡的岩土工程评价及液化危害

International Journal of GEOMATE Pub Date : 2023-11-01 DOI: 10.21660/2023.111.4077

Listia Ariani

引用次数: 0

ESTIMATING GYPSUM HEMIHYDRATE CONTENT USING DENSITY OF GYPSUM RECYCLED FROM WASTE GYPSUM BOARD 利用从废石膏板中回收的石膏密度估算石膏半水含量

International Journal of GEOMATE Pub Date : 2023-11-01 DOI: 10.21660/2023.111.3736

Hiroaki Sano

引用次数: 0

EARTHQUAKE DAMAGE ASSESSMENT FOR RC PIERS BY TIME-FREQUENCY ANALYSIS CONSIDERING ENTIRE BRIDGE 考虑整座桥梁的钢筋混凝土桥墩时频分析震害评估

International Journal of GEOMATE Pub Date : 2023-11-01 DOI: 10.21660/2023.111.4023

Aiko Furukawa

{"title":"EARTHQUAKE DAMAGE ASSESSMENT FOR RC PIERS BY TIME-FREQUENCY ANALYSIS CONSIDERING ENTIRE BRIDGE","authors":"Aiko Furukawa","doi":"10.21660/2023.111.4023","DOIUrl":"https://doi.org/10.21660/2023.111.4023","url":null,"abstract":": In this study, the previously proposed earthquake damage assessment method for reinforced concrete (RC) piers was verified through seismic response analysis of an entire bridge. The method measures the acceleration histories at the bottom and top of the pier during earthquakes to estimate the ratio of the initial natural frequency to the lowest natural frequency during earthquakes using time-frequency analysis since it is related to earthquake damage. The previous study verified the method through numerical analysis and shaking table test results of a single pier. However, since the actual pier is connected to the adjacent pier and abutment via the girder, it is important to consider the dynamics of the entire bridge. Therefore, this study verified the method through numerical analysis of the entire bridge. It was found that the method can detect damage to each pier when accelerations in the bridge axis direction are used because the natural frequency only changes for a damaged pier. On the other hand, the method cannot detect which pier is damaged and can only detect if any piers are damaged when accelerations in the direction perpendicular to the bridge axis are used since the natural frequency changed even for undamaged piers. It was verified that the difference between the two directions was caused due to the constraint conditions of the bearings.","PeriodicalId":47135,"journal":{"name":"International Journal of GEOMATE","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135320948","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

SOIL SETTLEMENT RISK FROM LIQUEFACTION AT LAKE TOBA TOURISM INFRASTRUCTURE, NORTH SUMATERA, INDONESIA 印尼北苏门答腊多巴湖旅游基础设施液化的土壤沉降风险

International Journal of GEOMATE Pub Date : 2023-11-01 DOI: 10.21660/2023.111.4029

Rizal Hafidzsyah

{"title":"SOIL SETTLEMENT RISK FROM LIQUEFACTION AT LAKE TOBA TOURISM INFRASTRUCTURE, NORTH SUMATERA, INDONESIA","authors":"Rizal Hafidzsyah","doi":"10.21660/2023.111.4029","DOIUrl":"https://doi.org/10.21660/2023.111.4029","url":null,"abstract":": Lake Toba has emerged as a captivating tourist destination in Indonesia, and the government is currently dedicated to enhancing the tourism experience through extensive infrastructure development initiatives. As progress continues, the hazard map for the region notably emphasizes its susceptibility to liquefaction. Therefore, this study aims to evaluate risk of soil settlement arising from potential liquefaction within the Tourism infrastructure of Lake Toba. According to the data collected, it was evident that the prevailing soil layer was dominated by sand and shallow groundwater, rendering it prone to earthquakes, increasing liquefaction potential. Soil settlement was also found in Lake Toba, which further magnified the possibility of liquefaction incidents. The analysis of liquefaction potential was carried out following the empirical method by Idriss-Boulanger (2014) in determining Liquefaction Potential Index (LPI) values. Furthermore, the assessment focused on soil settlement that was observed during instances of liquefaction, by employing methods outlined in Tokimatsu and Seed (1984), Ishihara and Yoshimine (1992), and Cetin (2009). The results showed that the areas exhibited a high liquefaction potential, as evidenced by significantly elevated LPI values. This study centered on settlement reaching up to 1.5 meters during liquefaction events, underscoring the imperative need to implement targeted measures for effective mitigation of this potential hazard.","PeriodicalId":47135,"journal":{"name":"International Journal of GEOMATE","volume":"258 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135273345","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

VELOCITY AND FLOW PATTERN AROUND BOTTOM OUTLET AS REVEALED BY PARTICLE IMAGE VELOCIMETRY 粒子图像测速显示底部出口周围的速度和流态

International Journal of GEOMATE Pub Date : 2023-11-01 DOI: 10.21660/2023.111.4036

Agatha Padma Laksitaningtyas

{"title":"VELOCITY AND FLOW PATTERN AROUND BOTTOM OUTLET AS REVEALED BY PARTICLE IMAGE VELOCIMETRY","authors":"Agatha Padma Laksitaningtyas","doi":"10.21660/2023.111.4036","DOIUrl":"https://doi.org/10.21660/2023.111.4036","url":null,"abstract":": This experimental study is to determine the velocity vector and flow contours in a reservoir with a bottom outlet. Velocity vector flow and contour characteristics are studied by making laboratory studies using acrylic models. The model combines the first pond as a constant head tank and the second pond as a reservoir with a hole at the bottom or bottom outlet. Particle Image Velocimetry (PIV) is an optical visualization qualitative and quantitative technique for measuring the velocity of a fluid by measuring the slight movement of a particle or object in a particular fluid area by observing the location of the tracer particle used in education and research detail. The PIV method relies on recording particle images and measuring object markers (tracer particles) distribution at several locations to measure instantaneous velocity and different phases, velocity fluctuations, and accelerations well in fluid flow. Brown shellac was chosen and used for tracer particles after several experiments using other seeding materials such as white shellack, glitter, and glycerine. The brown shellack is crushed manually, filtered to pass sieve 30 (0.5 mm), and retained on sieve 50 (0.3 mm). The recorded image file is then read and processed to obtain the magnitude and direction of velocity at the tracer particle locations captured in the image recording. The experiment was carried out by running the water flow from the constant head to the reservoir model by giving tracer particles of brown shellac. Experiments produce the most significant velocity around the bottom outlet is 265 cm/s or 2.65 m/s.","PeriodicalId":47135,"journal":{"name":"International Journal of GEOMATE","volume":"261 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135273504","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