Page 60 - 건축구조 Vol. 29 / No. 03

Project focus Compton and Edrich stands, Lord’s Cricket Ground Compton and Edrich stands, Lord’s Cricket Ground Project focus

해외작품소개

FERGUS McCORMICK beverage concessions, two new restaurants, ground level, with the outer perimeter of the alignment was at odds with the setting-out
new washrooms and a high-level connecting stands conceived as a lighter colonnade with of the frames at the northern and southern
MSt, MSc, MA, CEng, FIStructE, FICE
walkway for improved crowd circulation. slim columns. The structural framing of each ends in a fan arrangement (Figure 6). The
Partner, Buro Happold, Bath, UK
In contrast to the previous stands, the top stand developed to a moment frame solution in superstructures of these northern and southern
level is partially covered with a steel-framed roof, each direction. frames were all different and the variation was
which complements the subtle curvature and In the cross-section, the main part of the compounded by their main bases all needing
TIM SULLIVAN
form of the design while creating a distinctive main frames was generally supported on two to be designed to miss the tunnel. There were
IEng, AMIStructE silhouette, helping to heighten the sense of main columns with two further supports for the seven special foundation scenarios transferring
Technical Director, ISG, London, UK drama of sporting events. lower tier (Figure 3). The rear columns became columns over the tunnel.
A key requirement was to develop a coherent, pin-ended, enabling a transparent welcoming Further ground constraints included the
integrated structural design and construction elevation with a refined aesthetic; the lateral substructure of two previous versions of the
IAIN HILL
strategy respecting the high-quality aesthetic strength and stiffness was focused on an stands on this part of the site, which were
BEng, CEng, FIStructE, FICE that the client and architect required. inner main column coupled with the bending shown on archive drawings. The previous
Associate Director, Severfield, Bolton, UK This article describes how Buro Happold resistance of main grid-line rakers. Lateral stand was founded on pads, but the new, taller
considered all materiality for the frame design, resistance in the longer directions was also from development with its higher loads was founded
before selecting steel after an extensive moment action, with the main front column on rotary auger-bored piles in London clay. Pile
PAUL EDDLESTON
construction programming study. The design again providing the key strength and stiffness. diameters were 600mm and 750mm. Despite
MSc, BSc, CEng, MICE diagram of the steel moment frame in each The main supporting columns were some of PAUL EDDLESTON/BURO HAPPOLD the availability of records, the team decided that
Senior Structural Engineer, Buro Happold, Bath, UK direction was chosen to suit the required the largest elements in each of the two stands: FIGURE 3: every pile location should be probed to mitigate
openness, but the frame was designed with pin- typically 1400mm × 500mm box sections, with Framing diagram for risk – a decision subsequently justified by the
cross-section and
ended columns on the outer perimeter to enable 100mm thick base plates fixed with Macalloy fact that many probes located unexpected
MICK SLACK bending moment
a light colonnade elevation and stiffer columns bar anchor assemblies. There are nine of these diagram against obstructions that were not shown on the record
BEng, CEng, MIStructE on an inner line. The moment connections of the columns in the Compton stand and seven in the lateral loads drawings. These locations required modified pile
Engineering Manager, Severfield, Bolton, UK frame were key details, with Severfield providing Edrich stand. Positioned on grid line B, which positions and special pile caps.
important design input for the final choice. is in the middle of each stand, the columns sit The principal challenge was maintaining the
The article also discusses some of the towards the back of the lower tier, support the Designing for programme hosting of matches while increasing the ground construction programme as these discoveries
RAJAN MISTRY
challenges of working within the existing site 7m cantilevering seating area of the second Construction for sports projects within existing capacity and operational efficiency to enhance arose during the construction phase; probing
BSc (Hons) and the unprecedented demands imposed by tier, and also support the underside of the grounds needs to understand and respect spectator experience. However, site constraints took place relatively late as it could only follow
Engineering Technician, Buro Happold, Bath, UK Covid-19, explaining how ISG approached and uppermost seating level. the sports event calendar. This project was and working within an operational site presented demolition. During the peak of the piling, revised
worked through these. The steel section types, depths and no exception and the schedule included challenges. For this project, there were complex designs, models, drawings and reinforcement
Introduction connections give a clear legibility to the framing demanding quantities of work in each closed interfaces with adjacent structures, but the drawings needed to be produced very quickly,
Marylebone Cricket Club (MCC) has led the Design challenges diagram of the design (Figure 4). The lower season with two key dates: below-ground challenges were the most requiring close coordination and communication
game of cricket for over 200 years and helped Design diagram tier was not included in the radial lateral stability | Closed season 1 (September 2019 to spring demanding. between Buro Happold and ISG.
take it from a national pastime in England to The layout and organisation of floors and system as a low-level prop, because of its 2020): demolition and new superstructure. A shallow Thames Water tunnel runs right Another oddity of the existing site is that
a global obsession. At its heart is Lord’s, the seating tiers responded to the functional needs variable relationship to the main frame around | Playing season 2020 – key date 1: stands through the footprint of the stands. Its straight Lord’s is famous for having a sloping field, with
‘Home of Cricket’, where MCC is dedicated to of the buildings, with the overall form and shape the stands and because its optimum design ready for new season with seating capacity
growing its reputation as the most celebrated developed to complement the JP Morgan choice for construction was uncertain for some of 11 600, albeit with limited new fit-out and
venue in cricket. Lord’s has been at its current Media Centre. Each stand, including its roof, time. Eventually, the lowest part of the lower tier no roof.
location in St John’s Wood, northwest London was spatially offset from the Media Centre to was generally formed of in situ concrete and the | Closed season 2 (September 2020 to April FIGURE 4: Early sketch developing
member and connection design of steel
for over 200 years. allow each part of the new elevation to be read whole of the tier was laterally isolated from the 2021): completion of hospitality, canopy and solution. Note significant service hole
Responding to an increasingly competitive individually, but also so that all three separate remainder of the main frame. other site works. requirements in beams
sporting environment, the Ground has building blocks – the Compton stand, the Edrich The frame was designed to the dynamic | Playing season 2021 – key date 2: stands
been undergoing upgrade work to steadily stand and the Media Centre – could be read as criteria and method of the IStructE guide . complete for matches in the new season.
1
improve facilities in accordance with a staged a single new composition. The cantilevers are long, but the frame is not Stands open for England versus New
masterplan. MCC Chief Executive and The key structural design challenge was designed for concert events, which significantly Zealand on 3 June.
Secretary, Guy Lavender, has stated: ‘MCC is to maintain a light, airy feeling to the whole reduces the spectator excitation and, hence,
committed to ensuring Lord’s remains the best development and very open circulation at demand on the cantilevers. Before the onset of the project, the initial
place in the world at which to watch and play assumptions had been for a concrete-framed
cricket.’ structure. Steel was subsequently chosen
The latest phase of the masterplan for the main frame following a fully detailed
encompasses redevelopment of the Compton FIGURE 2: View from Nursery design, programming and cost option study
Ground (west) during later stages
and Edrich stands, which are situated either of construction showing new led by Buro Happold, which compared the
side of the distinctive aluminium JP Morgan stands, either side of JP Morgan comparative merits of a steel design, a precast
Media Centre at the famous Nursery End of Media Centre concrete design, an in situ concrete design and
the Ground (Figure 1). The previous stands other variants (Figure 5).
were dated and lacking in facilities. The new Significant constructional analyses found that
stands transform the Nursery End, providing steel construction was both quickest and the
world-class facilities, opening up views both only option that enabled the programme to be
to the Pavilion and back towards the Nursery achieved. Buro Happold optimised the structural
Ground (Figure 2), and adding another design design for minimum construction time using both PAUL EDDLESTON/BURO HAPPOLD
enhancement to Lord’s. conceptual thinking and traditional sketching of
A three-tier arrangement takes the capacity sequences along with advanced constructional
of the new stands from 9000 to 11 600 seats, STEVE MACEY/BURO HAPPOLD analysis. The schedule was so tight that floors
accompanied by two new main sponsor were optimised for piece count to reduce
boxes. There are new wheelchair spaces, cranage and hook time.
additional accessible seating exceeding
industry best practice, and modern associated Site constraints
amenities. Other features include food and Phased developments can allow continued

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