依搜集既有卵砾石层潜盾隧道案例显示，其施工可能遭遇如大卵石障碍物、卵石引致切刃磨耗、钻掘引致沉陷、潜盾机具选择等问题，这些问题之因应设计考虑与土层隧道者不同，亦为卵砾石层潜盾隧道重要课题之一。主要为依搜集台湾与日本卵砾石层潜盾隧道案例，基于卵砾石层工程特性，进行相关卵砾石层潜盾隧道设计考虑研析与建议，包括：1)地质调查项目与内容；2)设计研析，含结构分析考虑、潜盾机设计、开挖面稳定、背填灌浆、地盘改良、地中障碍物排除、地表沉陷特性等，期供工程界参考。

From consolidating similar past case studies with regards to the problems encountered during construction phase, this article is able to provide an important point of view on shield tunnel design in gravel layer. which is different from that in soil layer. Some common problems consolidated into the article are the barrier faced due to the presence of large boulders, the higher wear and tear rate of the cutting head, the settlement problems due to boring, the selection of best shield machine, etc. This article also comprised examples of shield tunneling in gravel layer mostly from Taiwan and Japan, the characteristics of the gravel layer, the design considerations and the proposal brought forward. Besides that, the article also consists of problems associated with shield tunnel design in gravel layer such as: 1) the site investigation's content and objectives; 2) the design analysis including the considerations, the selection of the suitable shield machine, precaution taken with regard to the stabilization of the excavation site, backfill grouting, ground improvement, removal of barrier found within the soil, the characteristic of the settlement during boring ,etc. The article can be used for future reference in the certain engineering projects..