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(사)한국터널지하공간학회

ISSN : 2233-8292

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Vol.17 No.4
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The study on the hydraulic pressure reduction of drainage shield tunnel using model test and field instrumentation

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2015, v.17 no.4, pp.429-440



& (2015). The study on the hydraulic pressure reduction of drainage shield tunnel using model test and field instrumentation. (사)한국터널지하공간학회, 17(4), 429-440.
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Abstract

In this study, model test equipment was developed to evaluate the hydraulic pressure reduction in appling the drainage shield tunnel and the model test for hydraulic pressure difference was performed in case of drainage and undrained conditions. In the result of model test, increase ratio of pore water pressure was decreased in drainage condition and total stress in drainage condition was smaller than that in undrained condition, so the hydraulic pressure was reduced by the groundwater inflow into the model tunnel. In the result of field instrumentation, the hydraulic pressure in the back ground of shield tunnel was small by 11~22% in comparison with the calculated hydraulic pressure (·H) in same groundwater level. In the result of model test and field instrumentation, it was appeared in drainage and undrained conditions that the difference between the theoretical hydraulic pressure and the real hydraulic pressure. It shows that it is possible to apply the reduced hydraulic pressure in applying the drainage shield tunnel and to reduce the segment section due to hydraulic pressure reduction.

keywords
배수형 쉴드터널, 배수 유로홈, 모형실험, 현장계측, 수압 저감, Drainage shield tunnel, Drainage furrow, Model test, Field instrumentation, Hydraulic pressure reduction

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