identifying the rock quality and inflow around the tunnel by drilling three basic holes with a 20-meter borehole ... In addition, it plans to analyze the condensation status and the effectiveness of reduction measures ... Undersea Tunnel 5.2 Cases and solutions for condensation in domestic tunnels 5.3 Condensation prevention measures
given time and resources, DBD will evolve substantially in the ability to drill deep holes and make measurements ... The concept of deep borehole disposal (DBD) for high-level nuclear wastes has been around for about ... With DBD, nuclear waste will be emplaced in boreholes at depths of 3 to 5 km in crystalline basement
were measured. ... thermal conductivities of several granite rocks which were taken from the rock cores from the declined borehole ... The thermal conductivities of granite were measured under the different conditions of water content to
measurements. ... The shear wave velocity profiles were compared with the columnar sections of the boreholes at the sites ... wave velocities are consistent with the changes in the sedimentary or lithologic faces found in the borehole
In addition, we measured vertical displacements of underground features indicating underground subsidence ... drilling and optical borehole imaging. ... by conducting optical borehole imaging 6 times over a period of 43 days at the study site 2.
, and hydraulic conductivity using slug test were measured. ... the lime-silicated rock were classified as three groups including cracked, weathered, and fresh and measured ... The hydraulic conductivity variation ranging from 0.8 to 9.3×10-4 cm/s for five boreholes and a gentle
boreholes and picking mistake of first arrivals. ... But it was very unstable to interpret the exact tunnel position because of short interval of two measuring
These include borehole deviation logging for inversion process, real-time data acquisition system, geophysical ... In this paper, to develop real-time measurement system, we adopt the high performance low power Micro ... We thus need to develop a subminiature, low-powered, multi-functional inclination and azimuth measurement
The inversion results have been compared with the borehole measurements of the area. ... The borehole measurements of the area show that are two distinct layers; the upper 4 meter of silty-sand
is determined by core cutter method for clay, sandy clay, clayey sand and fine sand and using direct measurement ... In case that the end the borehole is not met stable stratum layer with N>50 (for boreholes of 70m depth ... A total of 44 boreholes will be drilled.
located at downstream slope were measured. ... application of an old earth fill dam, temperature variations for water depth and for inner parts of boreholes
그림 3-3 지구물리검층 지구물리 검층은 시추공검층(borehole logging)으로 불리어지며, 이는 시추 후 혹은 시추와 동시에 지층에 대한 여러 가지 물성(전기비저항, 밀도, ... 최근에 와서는 시추와 동시에 지층의 물성자료를 직접 획득할 수 있는 LWD (Logging While Drilling)/MWD (Measurement While Drilling)를
햄머 효율, 시추공 직경, 시료채취 방법, 롯드의 길이 (SPT hammer efficiency, borehole diameter, sampling method, and rod-length ... on Liao and Whitman's correction factor. , c) consistency, and d) based on Schmertmann's method. a) measured ... 방사능 등)의 지중전파 거동을 측정하여 지층구조, 지층의 공학적 특성, 지하수상태 등을 간접적으로 파악 16.(5%) Briefly describe the princilpes of measuring