工程预可行性分析是桥梁和隧道建设前期工作的重点组成部分，往往成为项目立项的控制性因素。

Project pre-feasibility analysis, a crucial part of bridge and tunnel preparatory work construction, often becomes a controlling factor of a project.

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施工项目前期规划与预控制是在复杂环境下解决各种矛盾的重要方法。

The pre-planning and pre-control of the construction projects are important means to resolve every type of contradiction under mixed environments.

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对预可行性研究与立项、对前期工作的程序等问题结合几个实际例子提出了看法。

Advanced feasibility research, construction project placing, schedule of earlier stage work are discussed with same instances.

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