http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
물리탐사법을 이용한 콘크리트 구조물의 결함조사에 관한 연구
서백수,손권익,장선웅 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.A
Various nondestructive prospecting method were applied to detect the flaw of concrete structure, but the satisfactory result could not be obtained, yet. Fracture and cavities existing concrete structure will have a bad effect on physical and mechanical characteristic of concrete. This study deal with detection of flaws using seismic first arrival and various inversion method in theoretical model. And ultrasonic seismic method is tried to experimental model to detect fracture and cavity.
서백수,이덕재 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.A
Seismic reflection method is applied to detect shallow location of limestone in Chechon area. The data using hammer source is compared with that of weight drop. Small size hammer and weight-drop are used as energy source and 100Hz geophones are used for data aquisition. Data processing is conducted utilizing the available processing technique of "Geobit", which is seismic data processing software developed by KIGAM. The result of above data processing, the velocity of topsoil layer is 1,250m/sec. The velocity of this area is higher than other area because loading trucks pass this area and make this layer compact. And in limestone area, hammer is proposed to energy source instead of weight drop because the energy propagates the layer very well.
서백수,오석훈,손권익 한국지구과학회 2006 韓國地球科學會誌 Vol.27 No.5
The activity of the seismic wave propagation around the cavity is investigated for the exact inversion of thecrosshole tomography data, in order to understand the possibility of the existence inside the underground cavity. It isfound that the adequate frequency range for the tunnel investigation is about 2 kHz to 5 kHz, and the grid space shouldcavity according to the seismic velocity inside the cavity. The detouring wave propagates with the seismic velocity ofmother rock in spite of the velocity of inside of the cavity. The smaller the velocity difference is between the motherrock and cavity, the more frequent penetration of the seismic wave through the cavity appears.......... cavity, inversion, wave propagation, wavelength, seismic velocity. . : . ... .. ... .... ... ... ... .. ... ..... ... ... .. ... .
탄성파 주시 및 진폭 자료의 Simulation에 의한 터널 위치 추적에 관한 연구
서백수,손권익 한국지구과학회 2007 韓國地球科學會誌 Vol.28 No.1
Seismic and georadar prospecting methods have been used to detect deep seated small tunnel in Korea. Thetunnel position interpretation of seismic method has been performed mainly by wave travel time and amplitude. But itwas very unstable to interpret the exact tunnel position because of short interval of two measuring boreholes and pickingdetect tunnel position.......... seismic prospecting method, tunnel, travel time, amplitude, simulation. . : ....... .. .. ... .... .. ... ..... ..... .... .... ... , .
서백수,김용인 강원대학교 산업기술연구소 2003 産業技術硏究 Vol.23 No.A
Non-destructive method by tomography for safety diagnosis of civil engineenng and building structures is tried There are traveltime tomography that uses trareltime and fullwave tomography that uses the initial shock and seismic amplitude But these methods have difficulty and weak points in accuracy and selection of initial value. In this study, corrected inversion method which is able to solve the two difficulty and this method is applied to theoretical pier model to calculate tomography.
서백수,손권익,차영호 한국자원공학회 2005 한국자원공학회지 Vol.42 No.6
A seismic tomography method was applied to the investigation of an existed underground tunnel. Around tunnel, several boreholes were located to examine the tunnel existence. P-wave velocity tomograms were yielded by the first arrival traveltime tomography. We identified the location and the depth of the tunnel from each tomogram and derived the direction of the tunnel from this information. The derived location and direction of the tunnel were compared to the true location and direction of the tunnel. 본 연구에서는 터널 연구 지역에 여러 개의 시추공을 이용하여 터널과의 거리, 각도를 달리하면서 심부의 지하터널을 조사하기 위해 탄성파 토모그래피 방식을 이용하였으며, 초동주시를 이용한 토모그램을 작성하였다. 이 결과에 의해서 이론적인 각 터널의 위치 및 방향을 계산하였고, 현장모형과 같은 이론모형에 대하여 여러 가지 입력 자료를 변화시키면서 계산 결과 변화 양상을 관찰하였으며 앞으로의 터널자료 해석에 도움을 주고자 하였다.
서백수,손권익,김훈,김용인 한국자원공학회 2004 한국자원공학회지 Vol.41 No.3
Tomograph used corrected inversion method for concrete structure model using impact-echo method was tried. There are traveltime inversion method and full-wave inversion method on seismic data interpretation. The traveltime seismic method uses first arrival time which is calculated by ray method, finite element method, finite difference method and so on. Full-wave inversion is the best method in terms of model resolution and overcomes limitations imposed by the high-frequency restriction in traveltime inversion and the weak scattering approximation of Born methods. But this method have difficulties and weak points in accuracy and selection of intial velocity value. In this study, corrected seismic inversion method which is able to solve the above difficulties is applied to theoretical pier model to calculate tomography. 콘크리트 비파괴 검사법 중 탄성파를 이용하는 충격반향기법을 사용할 경우, 이론적인 역산기법에 의한 토모그래피를 작성하였다. 탄성파 탐사에서의 역산기법은 초동주시 역산법과 전파형 역산법이 있다. 초동주시 역산법은 초기도달시간을 이용하는 방법으로 파선법, 유한요소법, 유한차분법 등을 이용하여 초기도달시간을 계산할 수 있다. 전파형 역산법은 초동주시 역산법에 비해서 보다 나은 정확성을 보여주지만 적당한 초기치를 주어야만 하는 한계를 보여주었다. 본 연구에서는 초기치 문제를 해결하기 위하여 보정형 역산법을 콘크리트 구조물 모형에 시도하였다.
갱도(坑道)를 이용(利用)한 인공분극법(人工分極法) 모형(模型) 연구(硏究)
서백수,송영수,Suh, Baek-Soo,Song, Young-Soo 강원대학교 산업기술연구소 1985 産業技術硏究 Vol.5 No.-
A Mise-$\grave{a}$-la-masse method is to use a subsurface conductive mass itself as one current electrode of a pair by connecting it directly to one pole of a voltage source, the second current electrode being placed on the ground surface at a great distance and connected to the other pole. This paper is to study the modified Mise-$\grave{a}$-la-masse method using a water tank, that is, the second current electrode is placed on the underground level instead of being placed at a great distance, to find the geometry and the continuity of ore bodies.