Journal of the Korean Geosynthetic Society最新文献_第3页

A Case Study on the Reinforcement of Existing Damaged Geogrid Reinforced Soil Wall Using Numerical Analyses 基于数值分析的既有土工格栅加筋土墙加固实例研究

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Journal of the Korean Geosynthetic Society Pub Date : 2020-03-01 DOI: 10.12814/JKGSS.2020.19.1.075

M. Won, C. P. Langcuyan, Jeong-Hoo Choi, Yang-Seong Ha

{"title":"A Case Study on the Reinforcement of Existing Damaged Geogrid Reinforced Soil Wall Using Numerical Analyses","authors":"M. Won, C. P. Langcuyan, Jeong-Hoo Choi, Yang-Seong Ha","doi":"10.12814/JKGSS.2020.19.1.075","DOIUrl":"https://doi.org/10.12814/JKGSS.2020.19.1.075","url":null,"abstract":"There have been often cases of collapse for geogrid reinforced soil (GRS) retaining wall. Hence, social interest in the reinforcement and restoration of the collapsed GRS wall is increasing day by day. However, there are only few researches. For this reason, a series of numerical analyses using the Plaxis 2D program was conducted in this study to analyze the suitable reinforcement methods that can be applied on the existing damaged GRS wall caused by overturning of the modular blocks facing and the surface settlement at the backfill as the results from the design failure. The restoration plan used in this study is composed of two cases: (Case 1) soil nailing reinforcement and reinforced concrete (RC) wall facing construction on the existing damaged GRS wall; and (Case 2) removal of the entire damaged GRS wall and then reconstruction. The results on the internal stability of the GRS wall show that Case 1 obtained a greater safety factor than Case 2 for tensile force while Case 2 had a greater safety factor than Case 1 for pullout failures. Case 1 was found to be more stable than Case 2 in terms of the global slope safety by shear strength reduction method and the external deformation behavior by numerical analysis. In this study, the existing damaged GRS wall which was reinforced using Case 1 method shows more stable external behavior.","PeriodicalId":42164,"journal":{"name":"Journal of the Korean Geosynthetic Society","volume":"359 1","pages":"75-82"},"PeriodicalIF":0.5,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86800806","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: 1

Variation of Pull-out Resistance of Geogrid with Degree of Saturation of Soil 土工格栅抗拔力随土壤饱和程度的变化

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Journal of the Korean Geosynthetic Society Pub Date : 2020-03-01 DOI: 10.12814/JKGSS.2020.19.1.001

C. Ali

引用次数: 1

An Analytical Study on the Determination of the Lowest Improvement Depth of Deep Mixing Method 深层搅拌法最低改进深度确定的分析研究

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Journal of the Korean Geosynthetic Society Pub Date : 2020-01-01 DOI: 10.12814/JKGSS.2020.19.1.035

Choonsik Park, Ji-won Song

{"title":"An Analytical Study on the Determination of the Lowest Improvement Depth of Deep Mixing Method","authors":"Choonsik Park, Ji-won Song","doi":"10.12814/JKGSS.2020.19.1.035","DOIUrl":"https://doi.org/10.12814/JKGSS.2020.19.1.035","url":null,"abstract":"Design techniques for the deep mixing method, one of the soft ground improvement methods, include two ways to interpret the ground as composite ground and pile ground. However, since comparative studies on these two approaches are insufficient, it is difficult to clearly define the analysis criteria in the design. In this study, two-dimensional and three-dimensional analyses have been performed with different conditions. The three conditions, the embankment height, depth of soft ground, and replacement ratio of reinforcement zones were varied and the analysis was performed on the basis of the assumption of composite ground and pile ground for each condition. As a result, the minimum depth of improvement in the twodimensional analysis was deeper by 6.85∼9.08% than in the three-dimensional analysis. The pile ground analysis showed that the depth of improvement was deeper by 12.22∼ 14.45% than the composite ground analysis. Based on these results, it is concluded that for more accurate design, three-dimensional analysis should be performed rather than two-dimensional analysis. also, it is judged that necessary to analyze the ground as composite ground for economical design, and as the pile ground analysis for stable design.","PeriodicalId":42164,"journal":{"name":"Journal of the Korean Geosynthetic Society","volume":"33 1","pages":"35-44"},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83486176","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

A Study on the Field Application of Ground Stabilizer using Circulating Resource for Improvement of Soft Ground in Saemangeum Area 循环资源地面稳定剂在新万金地区软土地基改良中的现场应用研究

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Journal of the Korean Geosynthetic Society Pub Date : 2020-01-01 DOI: 10.12814/JKGSS.2020.19.1.103

Seo. Se Gwan, Kim, You-Seong, Cho, Daesung

{"title":"A Study on the Field Application of Ground Stabilizer using Circulating Resource for Improvement of Soft Ground in Saemangeum Area","authors":"Seo. Se Gwan, Kim, You-Seong, Cho, Daesung","doi":"10.12814/JKGSS.2020.19.1.103","DOIUrl":"https://doi.org/10.12814/JKGSS.2020.19.1.103","url":null,"abstract":"The DMM (Deep mixing method) is a construction method in which an improved pile is installed in the soft ground by excavation ground using an auger and then mixing ground stabilizer with soil. Improved pile installed in the soft ground by the DMM may have different compressive strength depending on the properties and characteristics of the soil. In the previous study, laboratory tests were performed on the ground stabilizer for the DMM developed by using the ash of the circulating fluidized bed boiler as a stimulator for alkali activation of the blast furnace slag. And the test results were analyzed to derive the correlation between the unit weight of binder (γB) and the uniaxial compressive strength (qu). In this study, comparative reviews were conducted on the correlations derived from the same laboratory tests on soil material collected from the Saemangeum area and the stability of the site was evaluated by analyzing the test results performed at the site. As a result, the clay collected from the Saemangeum area satisfies the correlation between the unit weight of binder (γB) and the uniaxial compressive strength (qu) derived from the previous study. And the result of the test at the field showed a higher uniaxial compressive strength than the standard strength at the field, indicating excellent stability.","PeriodicalId":42164,"journal":{"name":"Journal of the Korean Geosynthetic Society","volume":"115 1","pages":"103-110"},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77928183","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

A study on Development of Artificial Neural Network (ANN) for Preliminary Design of Urban Deep Ex cavation and Tunnelling 人工神经网络(ANN)在城市深挖隧道初步设计中的发展研究

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Journal of the Korean Geosynthetic Society Pub Date : 2020-01-01 DOI: 10.12814/JKGSS.2020.19.1.011

C. Yoo, Jaewon Yang

引用次数: 1

A Study on the Reinforcement Effect Analysis of Aging Agricultural Reservoir using Surface Stabilizer 地表稳定剂对老化农业水库加固效果分析研究

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Journal of the Korean Geosynthetic Society Pub Date : 2020-01-01 DOI: 10.12814/JKGSS.2020.19.2.013

K. Hong, Kim, You-Seong, Dae-sung Cho

{"title":"A Study on the Reinforcement Effect Analysis of Aging Agricultural Reservoir using Surface Stabilizer","authors":"K. Hong, Kim, You-Seong, Dae-sung Cho","doi":"10.12814/JKGSS.2020.19.2.013","DOIUrl":"https://doi.org/10.12814/JKGSS.2020.19.2.013","url":null,"abstract":"In Korea, small reservoirs have been constructed for the supply of agricultural water, but most of them have been over 50 years from the year of construction. Aging agricultural reservoirs are being investigated for serious defects such as leaks and movements in slope, which are very vulnerable to safety. Accordingly, grouting methods are used to reinforce aging agricultural reservoirs in Korea. However, cement used as a grouting injection material consumes natural resources and generates a large amount of greenhouse gases during production. In addition, there is a problem that sufficient reinforcement is not made due to various factors such as the injection amount, the compounding ratio, the injection pressure, and etc. Therefore, due to these problems, the development of new materials and methods that can replace the grouting method and cement is required. In order to solve these problems, this study conducted an laboratory test on the surface stabilizer used to secure the stability of road and rail slopes. In addition, the program was analyzed and the reinforcing effect was examined when the surface stabilizer was used as reinforcement material for aging agricultural reservoir. As a result of the laboratory test, when the surface stabilizer is mixed, the increase of cohesion is possible up to 9% and there is no change in the friction angle. The results of the program analysis showed that the 1.0m reinforcement of slopes increased the factor of safety by 1.4 times, making it possible to reinforce the aging agricultural reservoir using surface stabilizers. And as a reinforcement method, it was analyzed that it is most appropriate to reinforce the slope and the bottom of slope simultaneously.","PeriodicalId":42164,"journal":{"name":"Journal of the Korean Geosynthetic Society","volume":"42 1","pages":"13-21"},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75454669","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: 1

Dynamic Characteristics of the Box Structure in Multi-layered Ground Under Earthquake Load 地震荷载作用下多层地基箱形结构动力特性研究

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Journal of the Korean Geosynthetic Society Pub Date : 2020-01-01 DOI: 10.12814/JKGSS.2020.19.1.055

I. Kim, E. Shin, Jeongjun Park

引用次数: 0

Effect of N Value and Pile Length Ratio on Bearing Capacity Distribution of Cohesionless Soil N值和桩长比对无黏性土承载力分布的影响

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Journal of the Korean Geosynthetic Society Pub Date : 2020-01-01 DOI: 10.12814/JKGSS.2020.19.1.065

K. Lee, S. You, Junggeun Han, Jeongjun Park, Ki-sung Kim, G. Hong

引用次数: 0

Characteristic of Permeability with the Sand, Calcium Bentonite and Solidifier Mixtures according to Selective Reaction of TCE 基于TCE选择性反应的砂、钙基膨润土和固化剂混合物渗透性特性研究

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Journal of the Korean Geosynthetic Society Pub Date : 2020-01-01 DOI: 10.12814/JKGSS.2020.19.1.025

S. Yun, JeongSu Choi, Minah Oh, Jai-Young Lee

{"title":"Characteristic of Permeability with the Sand, Calcium Bentonite and Solidifier Mixtures according to Selective Reaction of TCE","authors":"S. Yun, JeongSu Choi, Minah Oh, Jai-Young Lee","doi":"10.12814/JKGSS.2020.19.1.025","DOIUrl":"https://doi.org/10.12814/JKGSS.2020.19.1.025","url":null,"abstract":"To improvement the swelling characteristics of the existing cutoff wall against the moisture, the permeability of the sand, calcium bentonite and solidifier mixture according to the contact with trichloroethylene (TCE) was evaluated. Characteristics analysis and the permeability test of the research materials were performed. The permeability was decreased as the mixing ratio of the calcium bentonite was increased and it was increased as the mixing ratio of the solidifier was increased. In conclusion, when mixing 15% of calcium bentonite and more than 30% of solidifier, the permeability coefficient in the underground water movement was analyzed as more than α × 10 cm/sec showing that it does not block the underground water movement. In addition, as the permeability coefficient of mixtures after TCE reaction was analyzed as less than α × 10 cm/sec, it satisfied the condition of blocking layer (less than 1.0 × 10 cm/sec). Therefore, the calcium bentonite and solidifier can be utilized as barrier that showing the characteristic of percolation ability conversion in soil and underground water contaminated with TCE.","PeriodicalId":42164,"journal":{"name":"Journal of the Korean Geosynthetic Society","volume":"26 1","pages":"25-33"},"PeriodicalIF":0.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73149032","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: 1

Development of Reinforcement Grout Materials Using Reinforcing Fiber and Blast Furnace Slag Powder 以增强纤维和高炉矿渣粉为原料的加固灌浆材料的研制

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Journal of the Korean Geosynthetic Society Pub Date : 2019-09-01 DOI: 10.12814/JKGSS.2019.18.3.101

H. Seo, Daehyeon Kim

引用次数: 2