• Proceedings of the Korea Air Pollution Research Association Conference
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• 2010.04a
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• pp.514-515
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• 2010

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2010.04a
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• pp.646-648
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• 2010

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2010.04a
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• pp.245-247
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• 2010

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2009.10a
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• pp.616-617
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• 2009

• Proceedings of the SAREK Conference
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• 2004.11a
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• pp.36-36
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• 2004

• Proceedings of the Korean Geotechical Society Conference
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• 1993.03a
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• pp.27-32
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• 1993

In tunnelling by NATM convergence data are most Importantly to ascertain the safety of tunnel. Therefore, a reliable method is required that can predict ultimate displacements by using earler displacement data. Displacement forecasting method is classified into statistical method and functional regression method. Convergence data measured in Seoul subway 5~45 site during '92.5 ~ '92.12 were analyzed by above said two methods. The analysis results of convergence data show that the functional regression method is more relieable in completely weathered rock, but the statistical method in slightly wearhred rock.

• Proceedings of the Korea Concrete Institute Conference
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• 2006.05b
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• pp.245-248
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• 2006

This study investigated the strength of shotcrete with aluminate accelerator to connect with the proper repair methods or monitoring skills in subway, cable tunnel and underground storage. In order to approach these goals, the shotcrete specimens were exposed to acid, sulfate and seawater environments, and strength properties of the shotcrete suffering from the attacking sources were examined.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2007.04a
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• pp.355-360
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• 2007

• Proceedings of the Korean Society for Rock Mechanics Conference
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• 2004.10a
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• pp.13-22
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• 2004

본 연구에서는 도심지 지하철 터널을 대상으로 지반공학적 위험요소가 공사비 및 공기에 미치는 영향을 정량적으로 평가하기 위하여 잔여 리스크 개념을 이용하여 조사개소의 증가에 따른 공사비 및 공기의 신뢰도를 분석하였다. 신뢰도 분석결과, 지반조사 개소가 증가함에 따라 공사비 및 공기에 대한 위험도가 축소됨을 확인하였으며, 이러한 결과를 통하여 도심지 지하철 터널에서의 지반공학적 위험도 분석의 유용성을 확인하였다.

• Proceedings of the KSR Conference
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• 2002.05a
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• pp.603-608
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• 2002

Sound absorbing materials are applied to the exposed surfaces of curved subway tunnel for the reduction of curving noise level. Before the treatment, acoustical engineering simulation is performed to predict the noise level reduction for different kinds and amounts of absorbing material. The principle of geometrical acoustics is utilized to Peform the simulation efficiently and accurately. The noise levels of the inside and outside of running car body are measured to find the noise level reduction. The average noise level reduction of 8 ㏈ has been attained. It has been shown that the simulated results are comparable to the measured ones.