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자료유형
학술저널
저자정보
Eskandari, Fatemeh (Department of Rock Mechanics Engineering, Tarbiat Modares University, Jalal Ale Ahmad Highway) Goharrizi, Kamran Goshtasbi (Department of Mining Engineering, Tarbiat Modares University, Jalal Ale Ahmad Highway) Hooti, Amir (Department of Geotechnical Engineering, Tarbiat Modares University, Jalal Ale Ahmad Highway)
저널정보
테크노프레스 Geomechanics & engineering Geomechanics & engineering 제15권 제2호
발행연도
2018.1
수록면
769 - 774 (6page)

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The growth of cities requires the construction of new tunnels close to the existing ones. Prediction and control of ground movement around the tunnel are important especially in urban area. The ground respond due to EPB (Earth Pressure Balance) pressure are investigated using the finite element method by ABAQUS in intersection of the triplet tunnels (Line 2, 3 and 4) of Mashhad Urban Railway in Iran. Special attention is paid to the effect of EPB pressure on the tunnel face displacement. The results of the analysis show that in EPB tunneling, surface settlement and face displacement is related to EPB pressure. Moreover, it is found that tunnel construction sequence is a great effect in face displacement value. For this study, this value in Line 4 where is excavated after line 3, is smaller than that line. In addition, the trend of the displacement curves are changed with the depth for all lines where is located in above and below, close to and above the centerline tunnel face for Line 2, 3 and 4, respectively. It is concluded that: (i) the surface settlement decreases with increasing EPB pressure on the tunnel face; (ii) at a constant EPB pressure, the tunnel face displacement values increase with depth. In addition, this is depended on the tunneling sequence; (iii) the trend of the displacement curves change with the depth.

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