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CONTACT:
Should you require further
details please contact
TOMMY NG,
Head of Geotechnical Engineering:
tommy.ng@atkinsglobal.com

Home > Areas of Business >Geotechnical > Capabilities > Deep Excavation (Excavation and Lateral Support)

DEEP EXCAVATION (EXCAVATION AND LATERAL SUPPORT)

Provision of New Passenger Lifts
Atkins is the design consultant responsible for the provision of passenger lifts from street level to concourses and station platform for some of the existing MTR Stations. All the external passenger lifts are located in urban areas congested with underground utilities and bounded in close proximity by MTRC's above ground structure, adjoining buildings and busy urban roads. Statutory submission including Excavation and Lateral Support Plan to Building Department (BD) for approval and consent is required. Depth of excavation reached about 20m for the lift shaft at Causeway Bay Station.

Extension of Baptist Hospital
Atkins is the consultant of the Baptist Hospital for the new extension to existing main block building. The new extension involved basement structure, which is located right next to the existing structure and is under the existing shallow foundation. The key success factors for the project are good planning and phasing of construction works so that it does not disturb the normal operation of the existing main block and the basement can be constructed at such a congested environment. The basement structure is approximately 32mx16m and the depth of excavation is about 7.5m. Pipe pile wall had been adopted to overcome the adverse ground condition and to limit its vibration effect on the patients and the live equipments.

Pipe-jacking Works Underneath KCRC East Rail at Kau Lung Hang
Atkins is the contractor's designer for this project and responsible for the pipe-jacking work at Kau Lung Hang. 4 nos. of 2.1m diameter storm water pipes were installed by Pipe Jacking Method (using TBM), across the existing KCRC East Rail for drainage improvements. Other than designing the cofferdam for the jacking and receiving pits, Atkins was also responsible for the design of the temporary sleeve pipe and the vibration and settlement prediction due to construction, in particular at the live KCRC rail track area. Ground improvement works and construction sequence were carefully considered to limit the amount of settlement. The cumulated settlements predicted were in close agreement with the on-site monitoring results. The operation of the rail tracks above has not been affected at all.

Geotechnical Consultancy Services for Excavation and Lateral Support Works for Proposed Composite Building for Holy Cross Parish at Holy Cross Path, Shaukeiwan
Atkins was engaged as a geotechnical consultancy for the design and supervision of the Excavation and Lateral Support Works. The site is about 30m x 50m and is bounded by existing footpath, access road and building structures. ?In order to overcome the boulder obstructions and limit the disturbance to the adjacent utilities, trees and low rise building with shallow footings, pipe pile wall with more than 200 nos. of 273mm dia. pile piles supported by 3 layers of strutting was proposed for the 9m deep excavation. . The strut and wailing system were carefully arranged to allow vehicular access at formation level to public road outside. The wall deflection, ground settlement and water-draw down were monitored and they are well controlled within the allowable values.

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