• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2006년도 추계 학술발표회
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• pp.430-433
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• 2006

Damage to earth structures for roads, railways and residential areas, as well as dams and river levees, during the 2004 Niigata-ken Chuetsu earthquake in Japan, and their rehabilitation works are overviewed. Several influential factors are pointed out, such as a) heavy rainfall preceding the earthquake, b) large aftershocks, c) geological conditions for subsoil including existence of liquefiable layers, d) compaction degrees for embankment, and e) drainage capacity from subsoil/embankments. It is also reported that, in the reconstruction works of damaged roads and railways, preferred use of geogrid-reinforced soil retaining walls was implemented.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2008년도 춘계 학술논문 발표대회
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• pp.43-46
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• 2008

In Top-Down construction for underground structures, the placement of slab as a horizontal supporting member against lateral earth pressure is an important process in determining construction time and cost. Usually, a reinforced concrete perimeter girder distributes concentrated lateral loads from earth retaining structures such as Cast-in-place (CIP) piles. By combining the function of the R/C perimeter girder and horizontal slabs, the Opened Slab Method is efficient for reducing construction time by elimination of time-consuming formwork for traditional perimeter girders. The structural performance of the method is also discussed in this paper.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 추계 학술발표회
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• pp.1130-1141
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• 2010

Even though a number of historic structures in Korea need to be repaired, an intensive research on their engineering performance has rarely been investigated. Herein, we attempted to provide a methodological approach via the explicit finite element analysis to investigate geotechnical aspect of the performance of the dry-stone wall structures. To do so, we summarized relevant literature on the world-wide historic stone structures as well as its analysis in terms of modern geotechnical engineering. The method of the explicit finite element analysis has been briefly summarized. The numerical results on an idealized block structure show that the displacement of blocks and the distribution of earth pressure is different from the conventional theory of the retaining wall because of the discrete nature of the dry-stone wall structure.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2011년도 춘계 학술논문 발표대회 2부
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• pp.49-52
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• 2011

This study concerned with the retention structures or inverted temporary building for displacement measurement in the underground soil after drilling a vertical tilt sensor attached to the vertical distance required to maintain a real-time measurement and management in order to install the wireless measuring devices installed in the field through remote control and management program for the safety of retaining structures temporary building be found on the internet in real time temporary building the retention is to develop a safety management system. And based on this technology to monitor the future status of the various structures possible to add a variety of sensors and Life Cycle Prediction of the structure and needs to evolve into intelligent systems and wireless networks using wireless communications infrastructure systems based on expanding domestic market penetration by developing instrumentation pioneer in overseas markets as well as the activation can also be judged.

• 한국지반신소재학회논문집
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• 제14권2호
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• pp.23-33
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• 2015

개착식 터널공법으로 시공된 지하철 건설현장을 대상으로 각종 계측시스템을 적용하여 지하 박스구조물에 작용하는 토압을 측정하였다. 이를 토대로 기존 이론식으로 산정된 측방토압과 현장에서 계측된 실측토압을 비교 검토하고, 실제 지하구조물에 작용하는 토압분포를 조사하였다. 조사결과에 의하면 지하 박스구조물에 작용하는 연직토압은 주로 성토고에 큰 영향을 받고 있으며, 측방토압은 흙막이구조물(버팀보, 흙막이벽)의 존치여부에 큰 영향을 받는 것으로 나타났다. 현장에서 측정된 지하 박스구조물 상단에 작용하는 연직토압은 Bierbaumer의 이론토압에 가장 근사하게 나타나고 있으며, 측방토압은 정지토압보다 주동토압에 가깝게 작용하고 있다. 그리고, 토압계수는 토사층의 경우 평균 0.35정도로 나타났으며 연암층의 경우 평균 0.21정도로 토사층에서 크게 나타나고 있다. 따라서, 지하 박스구조물이 토사층에 설치되는 경우, 지하 박스구조물에 작용하는 측방토압은 정지토압보다는 주동토압과 정지토압의 평균치를, 암반층에 설치되는 경우에는 주동토압을 사용하는 것이 보다 합리적이라고 판단된다.

• 대한토목학회논문집
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• 제14권3호
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• pp.553-563
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• 1994

본 연구에서는 탄소성 지반에서 지반스프링의 Coupling을 고려하여 토류벽의 거동을 해석하였다. 수치해석을 위해 벽체 양측의 지반을 탄소성 스프링으로 단순화하였고, 지반반력계수의 산정을 위해서 Terzaghi가 제안한 주동 및 수동상태에 필요한 수평변위를 p-y 특성곡선에 적용하였다. 본 연구에서 개발된 전산프로그램의 신뢰성은 기존 컴퓨터 프로그램 및 현장 실측치와의 비교를 통해 검증하였다. 검증결과 지반스프링의 Coupling을 고려한 경우가 현장 실측치의 변위 및 토압에 접근함을 알 수 있었고, 모래질 흙에서 주동상태에 필요한 수평변위의 변화가 벽체의 변위에 이주 작은 영향만을 준다는 것을 알 수 있었다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 춘계 학술발표회 초청강연 및 논문집
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• pp.251-258
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• 2008

The use of reinforced earth walls in permanent structures is getting it's popularity. Despite a number of advantages of reinforced earth walls over conventional concrete retaining walls, there exit concerns over long-term residual deformation when subjected to repeated and/or cyclic loads, during their service period. In this investigation, the effect of preloading in reducing long term residiual deformation of back-to-back reinforced soil wall under sustained and/or repeated loading enviormentment using a series of reduced-scale model tests. It is found that the preloading technique can be an effective means of controlling residual deformations of reinforced soils under varisous loading conditions.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2002년도 추계학술대회 논문집(I)
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• pp.626-632
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• 2002

Geogrid is widely used as the reinforcement materials in railway earth structures in order to achieve efficient land utilization as well as securing safety in railway service lines in other countries. In this study, the real scale test was carried out to investigate the application of geogrid reinforced soil segmental retaining walls(SRWs) in railway. For this goal, the vibration transfer characteristics of reinforced soil segmental retaining walls was evaluated. The resonant frequencies of SRWs, vertical ground vibration in backfill and vertical/horizontal vibration at segmental units were acquired. This experimental data and analysis result can contribute to understand the vibration response behavior of SRWs.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1994년도 가을 학술발표회 논문집
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• pp.158-168
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• 1994

This report describes aspects of recent braced excavation constructed in built up areas where adjacent buildings or underground utilities are likely to be subjected to settlement and damages. Trends and choice of earth retaining structures for deep excavation are present, and some desigen and construction techniques are introduced in order to minimise possible adverse effects to the urban environment. Some problems in design and construction of braced excavation in urban area are closely examined and remedial measrures are proposed.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2000년도 토목섬유 특별세미나
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• pp.53-58
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• 2000

The KOESWall system that minimizes the horizontal deformation of reinforced wall effectively was developed bt E&S Eng. Co., Ltd. in 1999. Due to its systematical feature i.e. isolated construction method. KOESWall system is able to use as temporary structures more economically without the facing block. In this report, it is shown that the case history of KOESWall as a temporary soil retaining structure and the field measuremnets.