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경암의 취성도와 TBM 순굴진율간의 관계

Relationship between brittleness index of hard rocks and TBM penetration rates

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참고문헌

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주제분류토목공학

초록

도시의 발전에 따라 전력선, 통신선, 상하수도배관 등을 공동으로 수용하는 공동구의 수요는 점점 증가할 것으로 예상되고 있으며 따라서 앞으로 TBM을 이용한 터널시공이증가할 것으로 예상된다. TBM을 이용한 터널 건설시 굴진율 예측은 공기와 공사비 책정의 중요한 요소이다. 현재, NTNU model, CSM model 등의 TBM 굴진율 예측방법이 있지만, 이 방법들은 많은 입력 인자들을 필요로 한다. 본 논문은 문헌조사를 통해 다양한 여러 지반 물성인자들 중, 경암의 취성지수 (Brittleness index)와 TBM 순굴진율간의 관계를 도출하고자 하였다. 특히, 인장강도와 압축강도의 함수인 취성지수는 그 정의에 따라 순굴진율과 관계가 다르고 매우 큰 분산을 가지는 것으로 나타났다. 본 연구는 TBM 순굴진율 예측에서 암반물성 중 취성도가 지니는 의미를 제시하고 있다.

Abstract

In rapid urbanization, demand for utility tunnel increases more, and tunnel boring machine (TBM) has been used widely. Prediction of TBM penetration rate is important for proper estimation of construction period and cost. Although there are several methods, such as NTNU model and CSM model that require many input parameters, fundamental understanding on correlations between rock properties and TBM penetration rate is critical. In this study, we explored the brittleness indices of hard rocks according to various definitions, and the correlations between the brittleness indices and the TBM penentration rates.

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