Clark Construction employs 3D modeling, laser scanning to solve healthcare project challenges

When it opens in 2023, a brand new healthcare facility for MedStar Georgetown College Hospital in Washington, D.C., will function the newest medical and technological advances.

The brand new 477,213-square-foot medical and surgical constructing will function 156 affected person rooms, 32 examination rooms and a rooftop helipad with direct entry to 31 working rooms. An intraoperative MRI system with a ceiling-mounted rail system connecting the diagnostic room and adjoining working rooms will convey the MRI magnet on to the affected person. As well as, the undertaking features a 600-car, below-grade parking storage, 18 elevators and 6 acres of recent inexperienced area.

The location is on the land of the previous Kober-Cogan Constructing, which was shut down in Might 2010 after the invention of mould in the constructing and beforehand had housed the hospital’s psychiatry division. 

That introduced distinctive challenges for the undertaking workforce, led by Bethesda, Maryland-based Clark Building. Miles of water utility strains, lots of which weren’t documented, had been operating immediately below the situation of the brand new pavilion to feed each MedStar Georgetown College Hospital and the Georgetown College campus buildings. The undertaking workforce needed to relocate these utilities exterior of the constructing footprint to permit the undertaking to start.

“The Clark workforce designed and engineered a 250-foot-long utility bridge to help chilled water and electrical companies from the central utility plant to the prevailing MedStar Georgetown Hospital,” mentioned Bradley Hunter, undertaking govt at Clark Building Group. “The bridge set up required shut coordination with mechanical and electrical contractors who put in the utilities on prefabricated racks which had been then hung from metal beams measuring 60 toes, permitting excavation to start under.”

Clark designed a short lived utility bridge to help lively utilities for the prevailing hospital.

Permission granted by Clark Building

Clark Building, together with architects HKS and Shalom Baranes Associates, assembled a BIM mannequin of the prevailing utilities. As design progressed and the essential construction and caisson places had been set, “we carried out further borings in any respect caisson places and additional knowledgeable the BIM excavation mannequin,” mentioned Hunter.

This preliminary step allowed the Clark workforce to higher inform the associated fee mannequin with respect to deep foundations and to start revising the excavation plan. With almost 1,000 piles to put in for help throughout excavation, Clark recorded the precise soil and utility situations encountered in real-time with every pile and enter the knowledge into the BIM mannequin. This drastically enhanced Clark’s understanding of the location and allowed to proceed to revise and resequence the excavation plan upfront of the sphere crews, mentioned Hunter. 

“On the completion of pile set up, we had been in a position to have a extremely complete profile of the anticipated excavation properly upfront of the ultimate section of excavation,” mentioned Hunter. “With this info, we’ve been in a position to develop mitigation methods in an effort to reduce impacts to the essential path of the undertaking.”

Group turns to expertise on website

Clark carried out a preliminary survey with conventional survey devices, such because the Leica MS50, which mixes complete station performance, GNSS connectivity, digital imaging and 3D laser scanning in a single instrument. The 3D expertise carried out checks of slab edges, precast concrete, joints and flooring flatness. The expertise additionally coordinates present buildings to carry out tie-ins with the façade.

After finishing and setting survey management factors across the website, the workforce started the scanning and format course of, mentioned Kathleen Lavelle, undertaking supervisor at Clark Building Group.

“For 3D laser scanning, we use our Leica MS50 once more which has full scanning capabilities. We use our survey management factors to tie the scanning knowledge into website coordinates. After scanning is full, Leica’s Infinity program is used to scrub up the scan,” mentioned Lavelle. “This may be exported to totally different file codecs relying on the software program getting used to work with the information.”

The survey workforce used Leica MultiWorx, an add-on app to Autocad Civil 3D. This scan knowledge can be utilized to generate present situations and as-built drawings as wanted.

Managing an inflow of individuals

Attributable to its location adjoining to a college and healthcare heart, the Clark workforce had to consider options to handle the circulate of scholars, sufferers and guests, particularly early within the COVID-19 pandemic to account for social distancing tips.

To do that, the development workforce constructed a short lived pedestrian bridge to take care of entry alongside the east facet of the jobsite. Moreover, an on-site batch plant, producing greater than 35,000 cubic yards of concrete, helped with site visitors congestion by decreasing the variety of deliveries to the undertaking website. The plant eliminated an estimated 3,500 vans off the highway in addition to guaranteeing concrete high quality on website, based on Lavelle.

Eradicating vans from the highway additionally helped scale back noise stage, one other problem as the development website is in shut proximity to a number of residential neighborhoods, mentioned Andree Yaap, undertaking govt at Clark Building Group.

Clark additionally labored carefully with the HKS and proprietor to guage which undertaking parts might be manufactured offsite. Utilizing a proper scoring and analysis course of, the workforce chosen parts to prefabricate primarily based on what would supply probably the most profit to the undertaking, mentioned Yaap.

The undertaking contains greater than 700 prefabricated supplies, together with 156 lavatory pods, working room ceilings, affected person headwalls, electrical rooms, medical rooms, MEP skids and racks, and inside partitioning, mentioned Yaap.

A line of affected person lavatory pods able to be put in.

Permission granted by Clark Building

Constructing parts had been manufactured throughout the nation, with lavatory pods being inbuilt Texas, working room ceilings being inbuilt Oregon, headwalls being inbuilt Oklahoma and wall panels being inbuilt Virginia, mentioned Yaap.

“Clark’s efforts have helped to expedite schedules and scale back prices,” mentioned Yaap. “Different advantages embrace enhanced high quality ensuing from meeting in a managed atmosphere, the discount of building exercise on website and a discount in noise ranges, neighborhood site visitors and congestion.”

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