OO상수도 매설관로 주요 불탐구간의 매설환경 조건은 고압송유관, 광케이블, 전력선, 도시가스관 등 주변지장물의 전자기장 간섭이나 도로 성토에 따른 토피고 증가 및 주변 굴착공사에 따른 접근 불가 등의 상태이므로, 관로 유지관리를 위하여 직접적인 조사 등을 실시할 필요가 있는 것으로 판단된다.

OO상수도 밸브실은 하부 PILE 미설치로 인하여 부등침하가 발생하였으며, 이로 인해 벽체 이격, 상부슬래브 균열, 배 관 접속부 파손 등이 발생하였다. 부등침하로 인한 밸브실 및 배관의 안전성 확보여부를 구조해석을 통해 확인하고 보 수·보강 공법을 제시하고자 한다.

According to this research, the buoyancy force safety review of the buried water pipeline is carried out to determine the safety. In addition, it suggests ways to use as basic data for establishing future maintenance strategy.

A detailed guideline was prepared to explain the contents of underground safety management guideline and to prevent confusion in the initial implementation of the law to underground safety impact assessment and underground safety inspection subjects. "Special Law on Underground Safety Management", which was created to prevent the safety of the people from frequent occurrences due to frequent occurrence of subsidence, has been systematically settled in the course of design, construction and maintenance of underground facilities. When it works smoothly, it can be said that national security is guaranteed.

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.

KISTEC(Korea Infrastructure Safety & Technology Corporation) has operated the U-safety Center which developing a user-participatory disaster management system with which it's possible for a user to transmit texts, photos and videos showing the current status of a specific disaster. With reported information about retaing wall, we had safety-inspected retaining wall and performed analysis of damage stats.

Many of the reservoir is surrounded by mountains, and many reservoirs slope are not receiving proper maintenance. The slopes of adjacent to the reservoir is the blind spot of the administration. Landslides in the reservoir had caused the destruction of the structure from wave and overtopping. In addition, this has a severe impact on the stability of the downstream portion. In this study, an infinite slope stability analysis utilizing the on-site investigation and SINMAP be performed for vulnerability analysis of the landslide of adjacent to the reservoir.

Recently, various types of landslide occurs frequently in domestic and foreign. The purpose of this study is to evaluate dam safety due to landslide in dam area. In order to evaluate dam safety on overtopping which may be occur by landslide, the scales of landslide were calculated through empirical formula and results of field survey in valleys, and wave heights of impulse were computed through numerical simulation for each case. Dam safety assessment was performed by the numerical analysis.

This study is for statistical analysis of road barriers by the highway-side. It is found there are various types of road barriers, and also most of them are reinforced concrete walls and reinforced earth walls. This statistics data will be helpful to road barriers’ maintenance field.

Recently, because people are taking a great interest in the water supply system and the related facilities are getting larger, the surge suppression is very important problem. The waterhammer occurs when the pumps are started or stoped for operation or tripped due to the power failure. As the waterhammer problems as a result of the pump power failure were very serious, these situations were carefully investigated. Accordingly, we carried out both numerical simulations to confirm the safety fot the intergrated operating of 1st stage and 2nd stage Juam intake pumping station in which had the in-line pumps. In this paper, it was reviewed that the water supply system has the reliability on the pressure surge, in case the air chambers were installed at both the inlet and the oulet of the in-line pumping station. we are sure that Juam intake pumping station in which have the air chambers is safe for the waterhammer.

According to recent meterological disasters, social awareness for safety of infrastructure is heightened by increasing natural disasters such as Fukushima accident, landslide of Umyeon mountain. Also scale of landslide is increased in Korea but safety review of dam is insufficient. In this study, we reviewed data(reservoir capacity, type of dam, danger map of korea forest service, satellite pictures, geologic map, etc.) and conducted site investigation whose the area is the most dangerous. Based on the results, we choose the most dangerous dam and analysis site close examination, slope stability analysis, scale of debris flow, etc. As a result, we will conduct measures establish on reinforcement and final evaluation of landslide's hazard.

According to recent meterological disasters, social awareness for safety of infrastructure is heightened by increasing natural disasters such as Fukushima accident, landslide of Umyeon mountain. Also scale of landslide is increased in Korea but safety review of dam is insufficient. In this study, we reviewed data(reservoir capacity, type of dam, danger map of korea forest service, satellite pictures, geologic map, etc.) and conducted site investigation whose the area is the most dangerous. Based on the results, we choose the most dangerous dam and analysis site close examination, slope stability analysis, scale of debris flow, etc. As a result, we will conduct measures establish on reinforcement and final evaluation of landslide's hazard.

The riprap zone of rock-fill dam is consists of shale, mudstone. This riprap is treated with engineered materials tends stable. The angle of bedding planes lead is split along the thin shale properties. Depending on weather conditions, such as exposure to soil physical and chemical properties have to be unstable. The subsidence and the slope-sliding due to weathering of the riprap occurs. The influence of weathering was analyzed by visual surveys and quantitative material properties

The local displacement in the downstream of the embankment dam has been observed since the 2nd precise inspection was investigated. It appears that this displacement is caused by the differential settlement on the different properties of the zone during the construction. Therefore, using the advanced inspection method of the 3D scanning determines whether to proceed with the displacement. In this study, reviewing a field application and analyzing results of the 3D scanning method are drowned a conclusion for improvement in the inspection and maintenance method on the Rock-fill type embankment dam.

In this paper, it is estimated the causes of wooden crib wall through detailed diagnosis and analysis of a crib wall construction site. As a results, it is occurred the damage in the members of about 6% in a total locations and the 65.7% of the damaged header are concentrated in the lower part of crib wall. Therefore, it is analyzed causes of wooden crib wall depending on the setup position and the kinds of members. It is considered basically the members of various forms of distortion and the grain affecting.

The purpose of this paper is to improve the method for rear cavity inspection of cut-off wall at concrete faced rock-fill dam. To do this, we suggested that using impact echo wave, analysis of embeded instruments data, and numerical method to considering the expecting crack open failure behavior. We hope that improved methods were assist maintenance of concrete cut-off wall at concrete faced rock-fill dam.

This study was performed to analyze destruction types and causes of timbacrib wall through detailed investigation on a large timbacrib wall construction site. As a result, the damage of member was 5.7%(2,315 locations) and 80.2% of damaged member was occurred in the member of header. The 65.7% of the damaged header was concentrated in the lower position of wall. From the results, it has been analyzed that the damage cause and type is different in the kinds of member and the installation position and the distortion of member can have a various effect on the timbacrib wall.

The purpose of this paper is to introduce the stability assessment method for treated wood retaining wall (Timbacrib Wall) which is made from the embalming processed timber. Timbacrib Wall is conducted a variety of investigation ; examination, boring examination, electrical specific resistance test. etc and stability analysis of stress and strength. According to the survey results, Timbacrib wall is suggested appropriate reinforcement with Micro-Pile and Anchors.

현재 각 관리 주체별로 절토사면에 대한 유지관리를 시행하고 있으나 평가항목 및 평가모형이 다양하고 접근방법이 상호보완적이지 못하므로 보편성 및 객관성이 부족한 실정이다. 따라서, 본 연구는 기존 절토사면 평가기법에 대한 분석을 통하여 합리적인 모형개발을 위한 접근을 시도하고 붕괴사례 분석을 통하여 붕괴 주요원인 및 인자를 발굴하고 이를 계층분석기법(AHP)을 이용하여 기존 절토사면의 조사․평가단계에서 조사우선순위를 결정하기 위한 평가표를 작성하였다.

적외선 영상이란 대상물을 열 적외선 영상장치로 촬영해 표면의 미소한 온도차이로부터 물체의 성질이나 물체내부의 상황에 대해서 비접촉, 비파괴로 조사하는 기법을 말한다. 열적외선 영상장치는 물체의 가시상을 영상화하는 보통의 촬영과는 다르고 물체의 온도를 영상화할 수가 있다. 일반적으로 적외선 열화상은 건축물과 지하구조물에 적용되어 왔으나 본 기술을 절토사면 안전관리 분야에 확대 적용함으로서 안전하고 신속하게 보수보강이 필요한 결함부위의 추출이 가능할 것으로 본다. 열 적외선 장치를 이용해 숏크리트 면을 촬영하면 배후 지반의 상태에 따라 표면의 온도가 다르게 나타난다. 일반적으로 공기의 부피 열용량은 흙에 비해 대단히 작기 때문에 모르터 배후에 공동부가 있는 경우에는 외부온도에 민감히 반응하며, 가열은 쉽고 감열은 서서히 나타난다. 반대로 물의 부피 열용량은 대단히 크기 때문에 습기가 많은 부위는 가열감열속도가 늦은 특성을 가지고 있다. 한편, 상온부근의 물체표면에서는 적외선(파장 3～14㎛)에 의한 열방사가 이루어지므로 열적외선영상장치를 이용해 이 열방사량을 면적으로 감지해 영상화하여 숏크리트면의 온도분포를 단시간에 효율적으로 획득할 수 있다. Fig. 1은 일반적인 열적외선 시스템을 나타내고 있다. Table 1은 열적외선 영상법의 주된 활용범위를 나타낸 것이며, 열적외선 영상법의 주요 특징은 다음과 같다. ① 측정대상물의 온도를 비접촉으로 계측할 수 있다.② 온도분포로서 영상화된 상태로 표시되기 때문에 평면적인 관찰이 용이하다.③ 야간에도 관찰이 가능하다.활용분야주요활용방법의 료체온측정전 자 전 기전기기구의 신뢰성 시험 및 이상조사전 력발전소 등의 설비보존, 점검기 상위성을 이용한 기상관측건 축건축물의 점검