The Downtown Bellevue Tunnel (DBT) is a key component of Sound Transit's East Link Project-a $3.7 billion, 14-mile light rail extension connecting Seattle with the cities of Bellevue and Redmond. The DBT construction contract was awarded to Atkinson Construction in the Fall of 2015. Subsequently, at the request of Sound Transit, the Contractor was asked to provide recommendations for reducing the DBT construction schedule by 3 months, to mitigate a delay in right-of-way acquisition and provide flexibility on an adjacent contract. This paper discusses the collaborative process involving Owner, Contractor and Engineer that supported the evaluation and implementation of the Contractor-generated proposals-including revisions to the prescriptively designed SEM excavation sequence, and elimination of pipe canopy, to accommodate the revised project schedule demands.
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机译：贝尔维尤隧道市中心（DBT）是Sound Transit East Link Project的关键组成部分 - 37亿美元，连接西雅图的37亿美元，带有贝尔维尤和雷德蒙德的城市。 DBT施工合同被授予2015年秋季的阿特金森建设。随后，应当要求承包商在3个月内提出减少DBT施工时间表的建议，以减轻延迟 - 方式获取并提供相邻合同的灵活性。本文讨论了支持合作者，承包商和工程师的合作过程，支持承包商生成的提案的评估和实施 - 包括对规范设计的SEM挖掘序列的修订，以及消除管道覆盖的修订，以适应修订的项目时间表需求。
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