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최원일,박근영,조국환,Choi. Won-Il,Park. Geun-Young,Cho. Kook-Hwan 한국방재학회 2010 한국방재학회논문집 Vol.10 No.2
D&B(Drill & Blast) 공법은 터널 시공시 현장지반조건에 대한 신속한 대응능력이 장점으로서, 정보화 시공에 의한 피드백해석(feedback analysis)이 필수적이며 이때 터널변위에 대한 신속하고 정확한 계측이 요구된다. 본 연구에서는 터널내공변위 계측에 있어서의 기존계측 사례와 첨단 IT기법을 이용한 계측사례의 비교 분석을 통한 적용성을 분석하고자 하며 적용성 평가를 위해 00지하철 현장에서 내공침하 비교계측실험을 실시하였다. 또한, 계측비용, 계측빈도, 계측간격, 계측기간, 계측소요시간 등을 평가항목으로 선정하여 실제 현장터널의 내공 및 천단변위 계측시 소요되는 계측 용역의 내역자료를 통해 경제성을 분석하였다. 따라서 터널 시공시 기존방법에 비해 보다 안전하고 경제적인 시공에 기여함으로써 첨단 IT기법을 응용한 레이저스캐너의 현장 적용성이 높다고 판단된다. D&B(Drill & Blast) method in tunnel construction requires accurate and rapid measurement of the ground movement, which is essential for feedback analysis. Case study and adaptability of IT technique for tunnel survey are discussed in this paper. The application of laserscannig and existing light wave instrument method in the field of tunnel construction were reported in several advanced country including Austria and Japan. Survey for the shoulder movements by IT survey method was conducted at a subway construction site and the results were compared to the conventional method. Also, the economic aspects of laserscannig method were analyzed using measured data which were categorized by expenses, frequency, interval and period in the field of construction. Therefore IT survey solution may contribute to execute more economic and safe construction
최원일(Choi Won Il),조국환(Cho Kook Hwan),박성욱(Park Sung Wook) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
D&B method in tunnel construction requires accurate and rapid measurement of the ground movement, which of essential for feedback analysis. Recently, survey technique adapting IT is getting more and more emphasized in the field of construction and tunnel survey also follow the same trend. Case study and adaptability of IT technique for tunnel survey will be discussed in this study. The application of laserscannig method in the field of tunnel construction was reported in several advanced country including Austria and Japan. Survey for the crown and shoulder movements by IT survey method was conducted and the results were compared to those do the conventional method. The pipe-roof, grouting, ring-cut are installed in the this site to prevent expected large ground settlement. The result show that laserscanner system is prefered rather than conventional method in that better understanding for the displacement condition and origin condition was liable by the lasersacnnig method. IT survey solution makes if possible to execute more economic and safe construction.
토목섬유를 이용한 철도용 보강토교대의 배면토압 저감효과에 대한 실험적 연구
이일화(Il-Wha Lee),최원일(Won-Il Choi),조국환(Kook-Hwan Cho),이주공(Joo-Gong Lee),홍은수(Eun-Soo Hong),이강명(Kang-Myung Lee) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.11
기존의 교량-토공 접속구조의 단점을 보완하고 성능을 개선하기 위한 방안으로 토목섬유와 시멘트처리뒤채움재로 보강된 접속구조를 제안하고 실물가속실험을 이용하여 교대배면에 발생하는 수직 및 수평토압의 저감성능을 평가하였다. 제안된 접속구조는 토목섬유를 이용하여 어프로치블럭을 보강하는 보강토 교대의 일종으로서 재료는 시멘트처리된 흙자갈을 사용하여 유용토의 활용을 증대시키고 우수 침입을 저감시켰다. 실물가속실험 결과, 제안 보강토교대는 토압저감에 탁월한 효과가 있는 것으로 나타났다. Geosynthetic-reinforced transition structure is suggested to improve the performance of existing bridge-earthwork transition structure. The suggested transition which reinforcing the approach block using high-tension geotextile has a similar structure with the earth reinforced abutment. The used backfill material is cement treated soil and gravel. This material is reducing water intrusion into the approach block and increasing uses the surplus earth materials. As experiment is performed under the same condition to compare with the existing transition structure. Evaluation items are vertical and horizontal earth pressure acting on abutment. As results of real-scale accelerated testing, the suggested transition structure has excellent performance for the reduction of earth pressure and settlement.