全球知名建筑事务所Goettsch Partners（GP）于近日完成了芝加哥联合车站大厅的修复工程。这个耗资2200万美元的Amtrak项目耗时三年多，是Goettsch Partners对该车站的一系列重大改造和修复项目中的最后一个环节。项目最初由著名建筑事务所Graham、Anderson和Probst & White主持设计，但在1925年其大厅因原始设计中的缺陷而开始漏水。随着情况的不断恶化，建筑必须进行一次彻底维修。

CHICAGO, February 7, 2019 — Global architecture firm Goettsch Partners (GP) has announced the culmination of a major renovation campaign for historic Chicago Union Station, with the recent completion of the Great Hall Restoration. This $22 million project for Amtrak, which took more than three years to complete, is the latest in a series of major redesign and restoration projects by Goettsch Partners at the station that started in 2010. Originally designed by renowned architecture firm Graham, Anderson, Probst & White, the 1925 Great Hall suffered water leakage and deterioration due to flaws in its original design, and was in need of substantial repairs.

▼大厅内部概览，overview

设计团队的当务之急，是对在过去几十年中遭受了严重水汽破坏的天窗进行改造。该天窗长达219英尺，是车站的代表性标志。为了在保持其历史外貌的同时修复铸铁的装配组件，由Leonard Koroski、FAIA和LEED AP领导的Goettsch Partners团队在原始结构的上方设计了新的节能天窗。新天窗由钢架和858块透明高效的玻璃组成，立于经过修复的铸铁天窗上方5英尺处。它在为地标建筑提供保护的同时，还使大厅内部的光照量比之前增加了50％。

▼加固后的天窗为大厅带来更多光照，the reinforced skylight brings more light to the hall

To address the necessary work, the design team renovated the station’s iconic, 219-foot-long skylight, which experienced extensive moisture damage over the past several decades. To restore the cast-iron skylight assembly while maintaining its historic appearance, the Goettsch Partners team, led by Leonard Koroski, FAIA, LEED AP, designed an energy-efficient, modern skylight above the original structure. Supported 5 feet above the restored cast-iron skylight, the new high-performance skylight of steel and 858 panes of clear, high-efficiency glass protects the landmark building while brightening the Great Hall interiors with 50 percent more natural daylight than before.

▼天窗全貌，full view of the skylight

▼新天窗立于经过修复的铸铁天窗上方5英尺处，supported 5 feet above the restored cast-iron skylight

GP在项目中的其他工作包括结构改进、新建管道、石膏和装饰的修复以及打造新的照明系统。“我们的愿景是在保护建筑历史文化特征的同时，作出必要的、可以延长建筑使用寿命的修复。”来自GP的设计师Koroski说。Koroski以保护和合理再利用历史建筑而闻名，其中包括芝加哥标志性的瑞格利大厦和市政歌剧院、以及密斯·凡德罗位于伊利诺伊州普莱诺的范斯沃斯住宅。

Other work designed by GP included structural improvements, new plumbing, plaster repair, restored ornamentation, and new lighting. “Essential to our vision for this project was preserving the historic design features of the building while making necessary improvements and repairs to stabilize this landmark for the long term,” said GP’s Koroski, who is noted for preservation and adaptive reuse of historic structures, including the iconic Wrigley Building and the Civic Opera Building in Chicago as well as Mies van der Rohe’s Farnsworth House in Plano, Ill.

▼作为大型交通枢纽，每日约12万名旅客和通勤者从这里出行，as a major transportation hub, about 120,000 passengers and commuters travel from here every day

▼大厅保留了原有建筑的历史文化特征，the hall retains the historical and cultural characteristics of the original building

Koroski和GP团队指导了油漆层的系统移除，以揭示石膏板原始的颜色。“在恢复联合车站原有的色彩搭配和加固天窗之后，游客可以在明亮且缤纷的大厅中享受来自20世纪20年代的真实体验。”Koroski说道。团队还与Berglund Construction合作，安装了一部新的电梯、修复了24顶吊灯和著名艺术家Henry Hering的两座雕像、并增加了27个仿古光源以改善室内照明。

Koroski and the GP architectural team directed the methodical removal of paint layers to reveal the original coloration of the ornate plasterwork. “By restoring Union Station’s original color scheme and stabilizing the skylight, visitors now enjoy the authentic experience intended in the 1920s, full of sunlight and color,” said Koroski. Working with Berglund Construction, the team also installed a new elevator and restored 24 ceiling chandeliers and two figural sculptures by noted artist Henry Hering, also unveiled in 1925. Historic reproduction light fixtures added 27 light sources to improve interior lighting.

▼来自著名艺术家Henry Hering的两座雕像，two figural sculptures by noted artist Henry Hering

一个创新的、带有回转平台的悬挂式工作平台代替了传统的落地式脚手架，使建造工作在正常进行的同时，不会中断每日约12万名旅客和通勤者的出行。Amtrak的副总裁David Handera表示：“大厅变得更加明亮诱人，这极大地增强了我们的客户体验。”作为对历史悠久的联合车站前厅大楼项目的补充，GP目前在南部相邻的地块上设计了一座新的高层办公大楼，计划于2022年开业。

An innovative, suspended work deck with swing stages—in lieu of conventional floor-mounted scaffolding—allowed the construction work to proceed without interrupting the 120,000 daily travelers and commuters at this major transit hub, according to Amtrak. “This work enhances our customer experience, with a much brighter and inviting Great Hall,” said David Handera, Amtrak Vice President, Stations, Properties and Accessibility. Complementing its work at the historic Union Station headhouse building, GP is currently designing a new high-rise office tower on an adjacent parcel to the south. Developed by Riverside Investment & Development and Convexity Properties, the building’s anchor tenant BMO Financial Group was announced in December 2018, with a planned opening in 2022.

▼建筑细部，details