BTS | PRAGUE METRO LINE D
Above:
Typical cross-sections of Nové Dvory station
5. EXPECTED SETTLEMENT The NATM design is underpinned by instrumentation— settlements, convergence and other response measures—with trigger limits set for each stage. Predicted maximum settlement above the Escalator Tunnel South, which is the biggest structure in the station, is around 105mm. During the ground movement assessment one building was flagged as critically affected and is therefore scheduled for demolition during the works. The impact on other surrounding properties has been assessed and is expected to remain within acceptable thresholds for settlement and damage.
6. STATION SECONDARY LINING Secondary lining for the station is divided into seven construction sections (DP1-5). The overall construction programme for the secondary linings is determined by receiving two TBMs from the south. When they are being pulled through the station the
Below:
Isometric with elements of anticipated excavation sequence in ‘Dome’ area of Nové Dvory station
pours can proceed for the station sump and the parking track tunnel and its ventilation shaft. After the TBMs have been pulled farther through the station then casting be done for the turnout tunnels, ventilation tunnel and the station ventilation shafts. Once the machines have
passed through to the end of the station then casting of the lift shaft, escalator tunnels and station internal RC structures can proceed. The most challenging geometry for casting the
linings is at the escalator-station connection. Given the three-dimensional geometry at the ‘egg’, a hybrid of form-traveller and bespoke timbering is anticipated to be used, with the final construction methodology defined in the contractor’s design.
7. OVER SITE DEVELOPMENT (OSD) The city of Prague will own the station and the land above it and has created a company for Over Site Development (OSD). The station design is currently being updated to integrate the vestibules within the OSD. The building foundations will be separate from the station, and the depth of below-grade storeys has been limited to avoid overloading. It has been verified that OSD load effects sit within the station design envelope.
8. GEOTHERMAL ENERGY HARVESTING As part of the project, the city is piloting geothermal energy harvesting. A ground source heat pump system consisting of 20mm collector loops will be fixed to the first reinforcement layer in the secondary lining, close to the interface between both linings. The loops will be connected via the South Escalator Tunnel to a heat pump at the basement level of the OSD. Preliminary estimates indicate potential annual supplies of the order of 1250MW to 1500MW per year for heating and 600MW-800MW per year for cooling.
9. OTHER SCOPE Mott MacDonald is also responsible for the design of three other major structures within Section 1b, as follows: 9a. Nadrazi Krc Station Station Nadrazi Krc is an at grade station partially constructed on a bridge above a pond. The station is divided into northern and southern
sections, and a nearby stream will be diverted within a pile structure. The northern part has cross walls to enable the excavation to cross the city ring road in
14 | April 2026
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