Preparatory work is underway for a summer installation of a new concourse at Dallas-Fort Worth International Airport using prefabrication and modular methods—a first for U.S. airports, say officials. Three self-propelled modular transporters (SMPTs) will deliver six modules of the new five-gate concourse to the site, with the anticipation of saving up to four months on the schedule as compared with traditional methods.
与沃尔什集团（Walsh Group）的Archer Western，H.J。Russell，Phillips/May和Pgal合资合资的船员开始拆除旧的72,000平方英尺的终端C扩展，并于3月在3月拆除了五个大门。DFW高级项目经理朱莉·卢德曼（Julie Ludeman）表示，新终端C高门的三个预制模块的建设已经开始。
The design-build portion of the project includes the building envelope, connections to site utilities, systems and connection to Terminal C. American Airlines handles a separate design-bid-build contract for interior fit-out. The concourse is expected to open in summer of 2022.
While the guaranteed maximum price for the design-build portion is still being determined, the value right now is $31 million, says Ludeman. The estimated total value is about $115 million, according to the project team.
该团队借鉴了加速桥梁建设的经验，以计划六个模块的运输，其中最大的86英尺乘86英尺乘33英尺。这些模块重达450吨，沃尔斯集团的国家航空总监托马斯·哈格（Thomas Haag）说。。他补充说：“紧张的公差需要较小的模块。”“如果它是格林菲尔德站点，那可能是两个单位。”
But the location is at an operating airport. “It’s a very active site, with a messy array of highways and buildings all around,” he says. “There’s the automated people mover; we can’t lift materials over it. The stick-build approach would have had a lot of challenges to mitigate.”
这些模块将于8月中旬完成。合资企业的高级项目经理艾伦·威尔逊（Ellen Wilson）说，在一系列的夜晚中，这些模块配有金属面板和玻璃，将被运输到四分之一英里，从预制场到该地点的出租车道上。她说：“从院子到航站楼将需要大约30分钟。”“这三个SMPT将平行移动。”
由Mammoet提供的SMPT最多可达5 mph。这些模块将被抬高到列上并设置在适当的位置。威尔逊说：“在九天内，这将是一个完全封闭的码头。”
Maneuvering beneath the aerial guideway for the people mover and through the airport complex, the SMPTs will have only 2 to 4 ft of clearances, Haag says.
The team used Etabs to analyze models for various loading conditions, including when the modules are on the transporters, on support columns and braking forces, says Elaine Rogers, president of Henderson Rogers, the structural engineer of record. “We pushed the technology to the limit to cover all conditions.”
The modules won’t just be simple, identical big boxes, says Julie Gavin, the team’s design project manager. “We punctuate the modules with two or three infill areas to have a ‘wow’ moment,” she says.
大局
The methods deployed to build the two-level, 80,000-sq-ft new concourse represent DFW’s evolution in project delivery, says Khaled Naja, DFW executive vice president. “We created interest in the [contracting] community about the future of design-build at DFW and advanced to prefabrication,” he says. “We’re always looking for the next big thing.”
Regarding state of good repair, “we have seven runways to redo, 133 bridges and 1,200 lane-miles of roads,” notes Naja. Although the pandemic put some $100 million in work on hold, this year the airport plans $300 million in construction.
