優選微觀組構或不連續面的存在，使得構築於裂隙岩體上的工程，如隧道、岩坡及基礎之行為不但與不連續面方位有關，且與隧道掘進方向、坡向及基礎作用力方向有關。忽略工程行為的異向性，可能將導致不合宜的設計，甚至引發工程結構的破壞。本計畫之主要目的在於探究不連續面方位對於構築於裂隙岩體中或其上的隧道、岩坡、基礎之工程行為的影響。本三年期計畫，第一年將聚焦於隧道挖掘方向與不連續面方位對隧道工程的影響。第二年集中探究裂隙岩體上基礎承載行為之方向依存性。第三年將探索坡面傾向與不連續面傾向對岩坡穩定性的影響。本計畫採用合成岩體模型以模擬裂隙岩體之隧道、岩坡及基礎在不同組合條件下之反應。本計畫將進行一系列的參數，研究包括：不連續面方位、裂隙程度、裂隙尺寸及費雪常數等。以探究構築於裂隙岩體中（或上）岩石工程之異向性工程行為。 ;Due to the preferred fabric orientation or the existence of non-random discontinuity, the engineering behaviors of rock tunnel, rock slope and foundation depend on not only the orientation of discontinuities but also the direction of excavation, direction of slope face and direction of applied loading. Ignorance of such anisotropic behaviors may lead inappropriate design and failures of engineering structures. This research is aimed at effects of discontinuities orientation on engineering behaviors of tunnel, slope and foundation in/on fractured rock mass. The first year of this research will focus on the effect of tunnel excavation direction coalesced with orientation of discontinuity. The second year of project will concentrates on the directional dependency of foundation on fractured rock. The third year of this research will explore the effect of dip directions between slope face and discontinuity on rock slope stability. Synthetic rock mass (SRM) model will be adopted to simulate the responses of rock tunnel, rock slope and foundation in/on fractured rock masses. A series of parametric studies, such as orientation of discontinuity, fracture intensity, fracture diameter and Fisher’s constant will be performed to explore the anisotropic engineering behaviors of rock engineering in/on fractured rock masses.
