本研究主要探討線形地中結構物，如隧道或維生管線受逆斷層錯動時產成的管土互制行為，並整合機率式斷層位移，據以評估適當的工程對策，以保護位於斷層錯動潛勢區中的地中結構物。本研究利用離散元素法軟體PFC3D與有限元素法軟體FLAC3D進行耦合模擬，模擬隧道與維生管線於逆斷層錯動時的力學反應，包括維生管線於覆土層中，經斷層錯動所受張、壓應力破壞之情形，以及隧道對覆土層剪裂帶發展的影響，數值模擬結果與既有離心機實驗(Baziar et al., 2014)進行比對驗證。隨後，延伸分析不同斷層傾角及隧道與斷層走向交角對結構物的影響，識別出造成損壞最嚴重的情境，並引入既有工程對策進行分析。研究結果指出高傾角逆斷層錯動相比低傾角錯動，對線形地中構造物會造成更高風險。當斷層與隧道軸向平行時且位於斷層剪裂帶中時，隧道會有最嚴重的受力破壞。斜交隧道受力略小於正交隧道，但正交隧道的應力集中處更好掌握，應力方向也比較單純，有利於工程對策的設計。以高傾角斷層走向與隧道軸向平行的模型設定，比較純輸水鋼管與使用工程對策保護的複合地中構造物之變形與力學反應，發現混凝土隧道與CLSM對於輸水管線之保護效果顯著。本研究亦設計全尺寸現地模型，並引入「大安溪大甲溪聯通管計畫」的現地參數與工程設計，運用 CLSM回填材、SPF鋼管可以形成明顯的弱帶，將變形量集中於設計區域內，有助於維持聯通管計畫的整體輸水能力，並提升輸水鋼管之服務年限與服務性能。;Fault rupture poses a significant hazard to geotechnical structures located near fault zones. However, it is often challenging to completely avoid fault displacement zones during the alignment planning of geotechnical infrastructures such as tunnels and pipelines. Therefore, this study aims to investigate the soil-pipeline interaction behavior subjected to reverse faulting and to evaluate appropriate engineering countermeasures to protect critical geotechnical infrastructures located within fault-prone areas. This research utilizes a coupled modeling approach by PFC3D with FLAC3D to simulate the mechanical response of tunnels and pipelines under reverse fault ruptures. The numerical results are validated against existing centrifuge test data (Baziar et al., 2014). Following validation, the study explores the effects of varying fault dip angles and the intersection angles between tunnel alignment and fault strike to identify the most critical scenarios. The most severe structural damage occurs when the tunnel is axially aligned with the fault and located within the fault shear zone. While obliquely crossing tunnels experience slightly lower stresses than orthogonally crossing ones, the latter allows for more predictable stress concentration zones and simpler stress directions, which are advantageous for designing mitigation strategies. Finally, A full-scale field model is developed based on a currently ongoing construction project. By incorporating CLSM and SPF pipes, a deliberately designed weak zone is intoduced to concentrate deformations within a targeted region. This strategy effectively preserves the water conveyance capacity of the interconnection pipeline system and significantly enhance both the service life and performance reliability of the infrastructure.
