본 연구는 지진계측시스템이 설치되지 않은 중소형 교량의 지진손상 수준을 평가하기 위하여 대상 중소형 교량 인근에 위치한 지진관측소의 지진관측 데이터를 이용하여 대상 교량위치에서의 지반응답스펙트럼을 추정하기 위한 알고리즘을 제시하였다. 일반적으로 중소형 교량의 내진설계 및 성능평가는 동적해석법 중 응답스펙트럼해석법이 가장 널리 활용되고 있으므로 대상 중소형 교량에 대한 평가 지진력으로 지반응답스펙트럼을 적용할 수 있는 알고리즘을 제시하였으며, 제안된 알고리즘을 이용한 프로그램 알고리즘도 제안하고 제안된 알고리즘을 통하여 실제 지진계측데이터를 이용하여 특정 위치에서의 지반응답스펙트럼 추정 예를 나타내었다.

In this study, the maintenance techniques of expressway geotechnical structures have been reviewed for the last 50 years. And, throuth this, necessary maintenance technology was derived in the future. As a result, the maintenance of the geotechnical structures was mainly developed for slope structures. And slope information system, alarm system, etc. have been developed and applied. In the future, technological advancement will be achieved by applying the 4th industry revolution technology.

This study suggested the estimation method of the ground response spectra at a structure location using earthquake acceleration data from seismological observatories. To suggest estimation method based on measured earthquake acceleration data, a algorithm for determining the observations near the structure site was suggested and a module for calculating a ground response spectrum was developed associated with a listed station determining algorithm.

지구 온난화 및 미세먼지 증가로 인해 악화된 도시 환경을 개선하기 위하여, 식물 적용에 대한 다양한 방법들이 모색되고 있다. 본 연구는 인공지반에 적용할 수 있는 녹다운(knock-down)방식의 식물 식재시스템 디자인에 관한 것이다. 기존의 알루미늄 프로파일을 이용한 조립구조형식의 플랜터는 제품의 생산, 운송, 설치 등 각 단계별로 발생할 수 있는 자원소비와 휨, 나사의 부식, 조립 해체의 어려움 등 기술적 문제점을 지닌다. 기존 플랜터의 문제점을 개선하기 위하여 부품종류 및 수량을 간소화하고, 반제품상태로 분리하여 평면화시킨 녹다운방식의 식재시스템을 도입하였다. 본 연구의 녹다운 방식의 식재시스템은 공장조립의 완제품에 비해 부피를 절감하여 운송비용의 감소 효과가 있으며, 비전문가에 의해서도 동일한 완성도를 기대할 수 있다. 운송과 설치가 간단한 시스템을 이용하여 다양한 식물의 특성을 반영한 디자인을 통해, 도시의 옥상을 포함한 인공지반에 더 많은 식물을 도입할 수 있을 것으로 기대한다.

본 연구에서는 일반 버팀보 공법을 개선한 조립식 버팀보 공법을 적용할 때 구조안정성에 대하여 검토하였다. 굴착단계별 가상의 최대 발생 토압력에 대해 좌굴되지 않도록 충분한 강성을 가지는에 대한 안정성검토를 실시하였다. 고강도 조립식 버팀보 공법은 상부플랜지에 일정한 간격으로 볼트 구멍이 천공되어 있는 공법이다. 구조물의 좌굴해석 결과 안전율은 약 5%정도 증가하였고, 발생응력이 허용응력보 다 낮기 때문에 버팀보의 구조 안정성은 확보된 것으로 판단된다. 특히 고강도 버팀보 공법을 적용 시 축방향 압축응력은 약 16% 증가한다. 고강도 버팀보 공법은 공사기간을 단축할 수 있으며 추가 부재를 구매할 필요가 없어 경제적이다.

This paper applied the concept of risk to prevent disasters in reservoirs and to manage them efficiently. However, there is a lack of information on safety management for small reservoirs managed by local governments. Therefore, considering such a reality, the geotechnical failure mode scenarios have been reduced to five types. In this study, the site investigation was carried out and the geotechnical failure probabilities were calculated based on the results, and then its applicability has been suggested.

In this study, to develop a risk assessment tool for geotechnical risk evaluation of local reservoirs. Generally, local reservoirs had some problems which is ageing, poorly compaction, differential settlement, leakage of adjacent conduit, material problem of adjacent spillway etc. Therefore, this study to develop geotechnical failure mode scenario for local reservoirs, and risk assessment tool considering internal erosion process. In addition, to carried out risk evaluation for pilot reservoirs and analyzed failure probability.

Frequent unstable natural disasters worldwide in recent year caused damage to large power plants, high-rise buildings, dams and public facilities, resulting in a growing sense of anxiety among people. This is result in the increase of concern for the safety of residential as well as public infrastructure. Considering this growing concern for the public infrastructure a systematic safety evaluation is require. Thus, in this paper, the fragility of weir structure by considering the scour effect of flood was the focused of study. The weir structure in this study was located in Daegu city; it served as the power and water supply and flood prevention. The study was performed by conducting penetration analysis on the variables of the adjacent ground.

In the case of the port mooring facility, jetties with piles are mainly applied in soft ground conditions. In the three-dimensional modeling for the structural analysis of jetties with piles, the boundary conditions between the pile and the ground are universally applied to the Approximate depth of pile supported method and Elastic subgrade reaction spring method. In this study, p-y curve data for the pile ground condition was generated using the LPILE program, and then the nonlinear spring considering the p-y curve as the pile and ground boundary condition was input and analyzed in the 3D modeling of jetties with piles using the MIDAS civil And the necessity of applying the Nonlinear subgrade reaction spring method by comparison with the result and the analysis result according to the existing analysis method is suggested.

본 연구에서는 발생가능한 홍수시나리오를 기반으로 하천제방의 복합위험도를 산정하고자 하였다. 이를 위해 불확실성을 고려한 수문학적/수리 학적/지반공학적의 위험도를 각각 MCMC (Markov Chain Monte Carlo), MCS (Monte Carlo Simulation), FOSM (First-Order Second Moment) 기법을 활용하여 해석하였으며, 이들 각각의 확률을 연계하여 결합확률 형태로 나타내었다. 적용대상 유역은 낙동강에 위치한 강정고 령보를 기점으로 상․ 하류 12.5 km 구간으로 선정하였으며, 구간내의 총 6구간의 제방이 포함된다. 수문시나리오는 제방 월류가 발생하는 100년/ 200년 빈도 신뢰구간 상한치(97.5%)의 홍수량이 사용되었고, 이에 따른 홍수위 해석을 수행하여 월류위험도를 산정하였으며 월류가 발생하지 않는 구간에서는 침투, 사면안정, 수위급강하 등 제방의 지반공학적 위험도를 산정하였다. 기존 결정론적 위험도 해석보다 확률론적 위험도 해석 에 의한 복합위험도가 제방설계에 보다 안정적, 경제적인 상승효과를 가져올 수 있을 것이며, 향후 수변구조물 설계에 지표로 사용될 수 있을 것으 로 기대된다.

In this study, it modeled the ground proper to geotechnical site characteristics in Korean urban area, compared geotechnical site characteristics of the selected 158 grounds in Korean urban areas with characteristics of the ground in the western part of the United States and performed earthquake responses to improve the decision method of the design earthquake force. Based on the amplification factor from the analysis results, the response spectra of each ground were developed and analyzed with the design response spectra presented in the seismic design criteria.

The ground settlement has been occurred recently, therefore, it is necessary to conduct the safety inspection of ground settlement. This study suggests the case study on the ground settlement safety inspection.

The tunnel structure is a structure supported by the ground rigidity around the tunnel excavation. Therefore, when tunnel excavation occurs, various problems arise in the tunnel when the ground stiffness is weak. These characteristics should be considered because the ground conditions in the design of tunnels are often different from the construction conditions investigated during tunnel construction

In this study, it modeled the ground proper to geotechnical site characteristics in Korean urban area, compared geotechnical site characteristics of the selected 158 grounds in Korean urban areas with characteristics of the ground in the western part of the United States and performed earthquake responses to improve the decision method of the design earthquake force. Based on the amplification factor from the analysis results, the response spectra of each ground were developed and analyzed with the design response spectra presented in the seismic design criteria.

As the ground subsidence phenomenon is become a social issue, the government and local governments making great efforts for ground subsidence prevention and response, and suggests a variety of related materials. In this study, based on related materials to analyze the causes and characteristics of the phenomena occurring ground subsidence in the domestic area. Using the result, ground subsidence phenomenon prevent occurrence. The results, three possible 1) underground pipeline, 2) Excavation, 3) Items classified as geological conditions cases occurred in city area, and it could be divide three categories again.

The purpose of this study is a image processing program development to consider the domestic situation of GPR detection. Therefore the image processing program will be developed to extract and to visualize the measured raw data.

This study presents flowable fill material using collected CO2 byproduct, which prevents geotechnical sinking related to underground utilities in the vicinity of downtown areas. The physical and mechanical characteristics of calcium carbonate found using laboratory tests (the uniaxial compressive strength test, comparison of the shear base of dynamic behavior and restriction pressure, the freeze-thawing test) on 3, 7, 14, 28, and 56 days of the flowable fill were investigated and analyzed. The correlations of the unconfined strength, elastic modulus, flow, and w/c were suggested as evaluation indicators of the mechanical characteristics for the calcium carbonate flowable fill.

이엑스티(주)는 2004년 원가절감형 이엑스티 파일Ext Pile을 개발 한 이후 연구개발 전담부서를 통하여 원가절감, 공기단축, 친환경 적인 공사 실현을 위해 많은 노력과 연구를 진행하고 있으며 끊임 없는 연구개발과 신제품 개발을 통해 독보적인 기술력을 바탕으로 기초·지반분야에서 종합적인 컨설팅 전문기업으로 각종기술인증 및 건실 신기술을 획득(제684호)하였다. 또한, 이엑스티(주)의 주력제품인 이엑스티 파일Ext Pile은 지난 12 년간 총 13,000km가 시공되면서 공사비 3,700억 원을 절감 하였으 며, 공사기간을 약 36년 단축하여 국내·외에서 대형 건설기업과 건 설현장의 엔지니어들로부터 호평을 받고 있다.