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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Geosynthetic Society
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Journal DOI :
Korean GeoSynthetics Society
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Volume & Issues
Volume 3, Issue 4 - Dec 2004
Volume 3, Issue 2 - Jun 2004
Volume 3, Issue 1 - Mar 2004
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Analysis of the Segmental Reinforced Retaining Wall Behavior by Field Monitoring
Shin, Eun Chul ; Lee, Chang-Seup ;
Journal of the Korean Geosynthetic Society, volume 3, issue 1, 2004, Pages 3~15
Geogrid reinforced soil structures with segmental block facing have been increased since 1990's, because of the convenience of installation and the flexible appearance. In this paper, the behavior of the segmental reinforced retaining wall was analysed with the results of field monitoring. The height and length of reinforced wall are 12m and 25m, respectively. The field measurement equipments are horizontal and vertical earth pressure cells, settlement plate, strain gauge, inclinometer, and displacement pin. Based on the field monitoring, the horizontal earth pressure was approximately 0.3times higher than that of the theoretical method and the maximum tensile strength of reinforcement was 26.2kN/m. The displacement of facing wall was 23mm at the point of 7.1m height of the wall and toward the wall facing. The results of the study indicate that the segmental reinforced retaining wall is in a stable condition because of good compaction & reinforcement effects, and long period of construction time. Finally, the computer program of SRWall is very useful tool to design the segmental reinforced retaining wall.
Effects of Vacuum Pressure in The Laboratory Horizontal Drain Test for Dredged Clay
Yang, Won-June ; Jang, Yeon-Soo ; Park, Jung-Yong ;
Journal of the Korean Geosynthetic Society, volume 3, issue 1, 2004, Pages 17~25
A horizontal drain method, which applies vacuum pressure at the end of a horizontal drain for discharging pore water, is used often for improving surface reclaimed clay in the field. In this study, to examine the effectiveness of improving consolidation or shear strength depends by varying vacuum pressure, laboratory chamber horizontal drain test using vacuum pressure is performed and the results is compared with that of self-weight consolidation. The results show that water content reduces with the increase of soil depth in case of self-weight consolidation, while it reduces near the horizontal drain and increases with the increase of the distance from the horizontal drain in case of applying vacuum pressure. The shear strength of dredged soil was improved as well, when the vacuum pressure is applied. The optimized consolidation was achieved at the vacuum pressure range of 30 to 50kPa in the laboratory box test of 50cm wide, considering the range of drain interval in the field was between 0.7 and 1.2m.
Geosynthetic-Reinforced Segmental Retaining Walls in Tiered Arrangement - Case Study and Field Trial Wall Instrumentation
Yoo, Chung-Sik ; Jung, Hyuk-Sang ;
Journal of the Korean Geosynthetic Society, volume 3, issue 1, 2004, Pages 27~36
This paper presents the results of stability analyses on soil-reinforced segmental retaining walls in a tiered arrangement. Four different walls were examined to investigate the appropriateness of their designs within the context of the current design guidelines based on limit equilibrium. Slope stability analysis against the compound failure mode, which is frequently ignored during design, was also performed based on the method recommended by FHWA design guidelines. Also presented are the results of instrumentation on a full-scale field trial wall constructed as part of this study. The implications of the findings from this study are discussed.
Weatherability Assessment of Nonwoven Geotextiles by Field Exposure Test
Jeon, Han-Yong ; Yuu, Jung Jo ; Kim, Young Yoon ; Byun, Sung Weon ; Byun, Sung Weon ;
Journal of the Korean Geosynthetic Society, volume 3, issue 1, 2004, Pages 37~42
In the reinforced retaining wall system, non-woven geotextiles are placed at the face of reinforced earth until the facing blocks are built up. And when this system is used as temporary structure, geotextiles facings are exposed to sunlight during service lifetime. During these periods, degradation of nonwoven geotextiles are occurred by UV light. So the UV-resistance of nonwoven geotextiles must be assessed correctly, in considering of the site conditions. In this study, laboratory test and the field test have been performed to evaluate the UV resistance of non-woven geotextiles used in KOESWall system and the results are expressed in terms of tensile characteristics & SEM photographs.
Behavior Characteristics of Reinforced Earth Wall using Fiber-Mixed Soil Backfill
Cho, Sam-Deok ; Ahn, Tae-Bong ; Oh, Se-Yong ; Lee, Kwang-Wu ;
Journal of the Korean Geosynthetic Society, volume 3, issue 1, 2004, Pages 43~52
Laboratory model tests were conducted to assess the behavior characteristics of geogrid reinforced earth walls using fiber-mixed soil backfill with different surcharge loads and reinforcement spacing. The models were built in the box having dimensions, 100cm tall, 140cm long, and 100cm wide. The reinforcements used were geonet(tensile strength, 0.79t/m) and geogrid(tensile strength, 2.26t/m). Decomposed granite soil(ML) with or without polypropylene fiber was used backfill material. Strain gauges and LVDTs were installed on the retaining walls to measure the strain of the reinforcements and the displacements of the wall facings.