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.

Hydrologic and Physicochemical properties are the properties of water, defined by physicochemical properties such as water temperature, electrical conductivity, pH and the concentration of inorganic ions. Although it is difficult to directly identify the cause of seepage through hydrologic and physicochemical analysis, it can be used as indirect data to estimate the origin of leakage.

This paper has a seepage measuring device installed on the water retaining wall at the bottom of the dam, but it has no seepage count and periodically uses underground water handling method to measure the level of seepage. Accordingly, observation of seepage quantities generated by the dam body is used as an important data to assess the safety of the dam body, so it is considered to improve the seepage quantity measuring device.

Recently, there are few cases of the Precise Inspection for Safety and Diagnosis for transverse crack of CFRD. The presumable causes and characteristics of transverse cracks have suggested in this paper based on field survey and related NDT. Also, the maintenance of transverse crack of CFRD are proposed.

According to this research, it was confirmed that safety coefficient is useful tool to rationally quantify structural deterioration of pipe. In addition, it could perform simple and rapid evaluation escaping from confinement by time and budget, and it can be utilized as a tool to set up policy for future water supply.

Recently, there are few cases of the Precise Inspection for Safety and Diagnosis for transverse crack of CFRD. The presumable causes and characteristics of transverse cracks have suggested in this paper based on field survey and related NDT. Also, the maintenance of transverse crack of CFRD are proposed