Journal of the Korean Geosynthetic Society最新文献_第9页

A Study on Flexural Rigidity of Two-row Overlap Pile Wall for Deep Excavation Support 深基坑支护双排重叠桩墙抗弯刚度研究

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Journal of the Korean Geosynthetic Society Pub Date : 2018-01-01 DOI: 10.12814/jkgss.2018.17.1.033

Won-Hyuk Choi, You-Sung La, Bumjoo Kim

引用次数: 0

Experimental Study on the Reinforcement Effect of Geogrid in Soft Ground Improvement 土工格栅加固软土地基试验研究

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Journal of the Korean Geosynthetic Society Pub Date : 2018-01-01 DOI: 10.12814/JKGSS.2018.17.2.001

H. Ham, Lee Sang Duk

{"title":"Experimental Study on the Reinforcement Effect of Geogrid in Soft Ground Improvement","authors":"H. Ham, Lee Sang Duk","doi":"10.12814/JKGSS.2018.17.2.001","DOIUrl":"https://doi.org/10.12814/JKGSS.2018.17.2.001","url":null,"abstract":"The number of construction of roads and railroads in soft ground such as coastal areas and wetlands is getting increased. For this reason cases that soft ground improvement is applied are increasing. In general, many ground improvement methods consider only the working conditions at the time or only economy. But if the working condition and economy are taken into consideration together, the number of applicable construction method gets limited. In such a case, a ground improvement method using both the surface layer portion and the deep layer portion is applied. But the basic research on this is still insufficient in practice. Therefore, in this study the reinforcement effect of geogrid was investigated by carrying out the model test realizing the case in which soft surface ground improvement and depth improvement are simultaneously applied. And it was intened to understand the effect of the thickness of surface layer, the diameter and length of the improvement body on the reinforcement effect of geogrid. The result showed that the effect of the surface layer thickness is greater than the effect of the deep layer diameter. Moreover, when the surface layer is reinforced with a geogrid, the strength of the surface layer part is enhanced and this effect of a geogrid reinforcement caused the reduction of surface settlement. 요 지 해안지대나 습지와 같은 연약지반에 도로나 철도 건설이 빈번해지면서 이를 위한 연약지반 개량 사례가 증가하고 있다. 일반적 으로 연약지반 개량시 작업조건만을 고려하거나 경제성만을 고려한 공법은 다수 존재하나 작업조건과 경제성을 함께 고려할 경우 적용 가능한 공법은 제한적이다. 이러한 경우 표층부와 심층부를 병용하여 개량하는 공법이 적용되어지는데, 이에 대한 기초적인 연구가 부족한 현실이다. 따라서, 본 연구에서는 연약지반에서 표층부 개량과 심층부 개량을 병용하는 경우에 대해 모형시험을 수행하여 지오그리드 보강 효과를 확인하고자 하였으며, 이때 표층부의 두께, 심층부 개량체의 직경 및 길이가 지오그리드 보강 효과에 미치는 영향을 파악하고자 하였다. 그 결과 표층부의 두께가 심층부의 직경보다 보강효과가 크다는 것을 확인하였고, 또한 표층부를 지오그리드로 보강한 경우 표층부의 강도가 증진되어 침하량이 저감됨을 확인하였다.","PeriodicalId":42164,"journal":{"name":"Journal of the Korean Geosynthetic Society","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86940028","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

Numerical Analysis and Laboratory Experiment of Rapid Restoration of Underground Cavity Using Expansive Material without Excavation 膨胀材料不开挖快速修复地下洞室的数值分析与室内试验

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Journal of the Korean Geosynthetic Society Pub Date : 2018-01-01 DOI: 10.12814/JKGSS.2018.17.1.055

Kicheol Lee, Byeong-Hyun Choi, Jongho Park, Dongwook Kim

引用次数: 4

Effect of Ground Water Table on Deep Excavation Performance 地下水位对深基坑开挖性能的影响

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Journal of the Korean Geosynthetic Society Pub Date : 2018-01-01 DOI: 10.12814/JKGSS.2018.17.3.033

Ju-Sang Song, Q. Abbas, C. Yoo

引用次数: 1

A Case Study on Deformation Behaviors of CFRD with Water Level Change 水位变化对CFRD变形行为的影响

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Journal of the Korean Geosynthetic Society Pub Date : 2018-01-01 DOI: 10.12814/JKGSS.2018.17.1.021

Yun Jung Mann, G. Yea, H. Kim, Jae-Yeon Lee

{"title":"A Case Study on Deformation Behaviors of CFRD with Water Level Change","authors":"Yun Jung Mann, G. Yea, H. Kim, Jae-Yeon Lee","doi":"10.12814/JKGSS.2018.17.1.021","DOIUrl":"https://doi.org/10.12814/JKGSS.2018.17.1.021","url":null,"abstract":"This paper analyzes the displacements of CFRD which was completed by field measurement. It is to understand the deformation behavior of the dam body according to the water level change from the impounding time. And it was compared with numerical analysis results. As a result of measuring the behavior of the dam crest and downstream slope according to impounding, horizontal displacements in axis direction of the dam, upstream and downstream displacements and settlements occurred mostly when the water level reaches about half of the dam height. The displacements continued until the water level reached its maximum. After that, it showed a constant convergence regardless of the water level. Horizontal displacements of the face slab which is the most important in CFRD were similar at all locations. The Horizontal displacements of the face slab showed the trends of increasing in winter and decreasing in summer due to the effect of the outside temperature before impounding. Also, the displacements increased until the water level reached about half of the dam height. After that, they decreased with rising in water level. As a result, the face slab behaviors according to seasonal change after impounding as well as water level condition. It is judged because of the material characteristics of the concrete slab. Numerical analysis showed slightly different maximum settlement and depth of occurrence from the measuring data after construction of the dam. It is considered that this is due to various design and construction differences such as the estimation of input parameters in analysis, construction period, and the layer thickness of construction. For the overall period of the dam, the settlements were mostly completed during the construction period and some settlements occurred in the early days of impounding and then converged.","PeriodicalId":42164,"journal":{"name":"Journal of the Korean Geosynthetic Society","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84852737","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

The Fundamental Study on th e Soil Remediation for Copper Contaminated Soil using Nanobubble Water 纳米泡水修复铜污染土壤的基础研究

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Journal of the Korean Geosynthetic Society Pub Date : 2017-03-30 DOI: 10.12814/JKGSS.2017.16.1.031

Jeon Sohee, Dongchan Kim, Junggeun Han

{"title":"The Fundamental Study on th e Soil Remediation for Copper Contaminated Soil using Nanobubble Water","authors":"Jeon Sohee, Dongchan Kim, Junggeun Han","doi":"10.12814/JKGSS.2017.16.1.031","DOIUrl":"https://doi.org/10.12814/JKGSS.2017.16.1.031","url":null,"abstract":"The fundamental study for an application of nanobubble as a soil remediation enhancer on heavy metal contaminated soil was carried out. The existence and long-term stability of hydrogen nanobubbles were investigated by particle analysis and zeta-potential analysis. And the removal efficiency of copper using nanobubble water(NBW) and distilled water(DW) were compared and analyzed through a batch desorption test. As a result, it is confirmed that nanobubble which was fabricated by compression-dissolution type generator can exist for more than 14 days. The results of batch test show that copper removal of NBW was higher than that of DW irrespectively to soil type and increased as solid-liquid ratio and contact time increased, respectively. According to the pH change, the removal of copper on sand was higher on the acid side but the removal difference was slightly lower on the clay. It is considered that a high efficiency of NBW in copper removal is due to the large surface area and high zeta-potential of nanobubbles. Therefore, the nanobubble can be applied to soil remediation for heavy-metal contaminated soil as an eco-friendly enhancer.","PeriodicalId":42164,"journal":{"name":"Journal of the Korean Geosynthetic Society","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2017-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80790008","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: 6

Evaluation of CPTU Cone Factor of Silty Soil with Low Plasticity Focusing on Undrained Shear Strength Characteristics 基于不排水抗剪强度特性的低塑性粉质土CPTU锥因子评价

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Journal of the Korean Geosynthetic Society Pub Date : 2017-03-30 DOI: 10.12814/JKGSS.2017.16.1.073

Ju-Hyun Kim

引用次数: 0

Flexural Performance of Cement Treated Clay-Sand Mixtures Reinforced with Synthetic Fibers 合成纤维增强水泥处理粘土-砂混合料的抗弯性能

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Journal of the Korean Geosynthetic Society Pub Date : 2017-03-30 DOI: 10.12814/JKGSS.2017.16.1.019

D. Jung, Baik-Soon Cho, Yong-yun Lee

引用次数: 2

The Estimation of Volume Conversion Factor of Rock Fill using Field Density Test 用现场密度试验估算堆石体体积换算系数

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Journal of the Korean Geosynthetic Society Pub Date : 2017-03-30 DOI: 10.12814/jkgss.2017.16.1.009

Jong-Beom Park, M. Ma

引用次数: 0

Model Tests for Examination of Overflow Failure Mechanism on River Levee 河堤溢流破坏机理的模型试验研究

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Journal of the Korean Geosynthetic Society Pub Date : 2017-03-30 DOI: 10.12814/jkgss.2017.16.1.041

Jin-Man Kim, Min-Cheol Park, In-Jong Moon, Yoon-hwa Jin

{"title":"Model Tests for Examination of Overflow Failure Mechanism on River Levee","authors":"Jin-Man Kim, Min-Cheol Park, In-Jong Moon, Yoon-hwa Jin","doi":"10.12814/jkgss.2017.16.1.041","DOIUrl":"https://doi.org/10.12814/jkgss.2017.16.1.041","url":null,"abstract":"This research conducted the two types of model tests to examine the failure parameters by levee overflow, those were the pilot-scale levee (model height 0.4∼0.8 m) and real scale levee (model height 1.0 m). The procedure of levee failure by overflow was succeeded to the following three steps: At first step, the local scouring on levee slope was happened and the overflow velocity was increased slowly. At second step, the enlarged scouring surface and the rapid overflow velocity were succeeded. At last, the levee section was broken totally and the overflow velocity was decreased because of the wide failure surface of levee. The levee failure angle () was appeared bigger than slope failure angle of Rankine earth pressure. The enlarged levee height () made the faster overflow velocity () of the levees, therefore additional tractive force was applied to it, futhermore the failure angle () and failure surface () were enlarged. Because the sand sample for pilot-scale and real scale tests had the same diameter, the critical scouring velocity of each type was also the same, and the scouring properties were governed by variation of overflow velocity.","PeriodicalId":42164,"journal":{"name":"Journal of the Korean Geosynthetic Society","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2017-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74516038","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: 3