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1027615

registered interest
date	18/12/2018
answering body	Department for Transport
answering dept id	27
answering dept short name	Transport
answering dept sort name	Transport
hansard heading	High Speed 2 Line
house id	1
legislature	25259 pref label House of Commons
question text	To ask the Secretary of State for Transport, who will be liable for damage to buildings above the High Speed Two London tunnel route during its construction; and whether repairs resulting from such damage will be made (a) before, (b) during or (c) after construction.
tabling member constituency	Hampstead and Kilburn
tabling member printed	Tulip Siddiq
uin	203357
answer	answer is ministerial correction date of answer 20/12/2018 answer text <p>The nominated undertaker (HS2 Ltd) is responsible for any damage to buildings above the HS2 London tunnel route resulting from its works. Claims can be made at any time by a property owner, and depending on the nature of the claim and the impact on the property, repairs may be made during or after construction.</p><p> </p><p>More information can be found in HS2 Ltd’s Information Paper C3: Ground Settlement, which forms part of High Speed Rail (London to West Midlands) Act 2017, available at: <a href="https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/672194/C3_-_Ground_Settlement__v1.pdf" target="_blank">https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/672194/C3_-_Ground_Settlement__v1.pdf</a></p><p> </p> answering member constituency Wealden answering member printed Ms Nusrat Ghani question first answered 20/12/2018 16:26:55 answering member 4460 label Biography information for Ms Nusrat Ghani
tabling member	4518 label Biography information for Tulip Siddiq

1027617

registered interest
date	18/12/2018
answering body	Department for Transport
answering dept id	27
answering dept short name	Transport
answering dept sort name	Transport
hansard heading	High Speed 2 Line
house id	1
legislature	25259 pref label House of Commons
question text	To ask the Secretary of State for Transport, whether his Department has (a) identified and (b) received representations on the problems during the construction of the listed Alexandra and Ainsworth estate which led to (a) additional costs and (b) unique foundations being used to stabilise its buildings.
tabling member constituency	Hampstead and Kilburn
tabling member printed	Tulip Siddiq
uin	203358
answer	answer is ministerial correction date of answer 21/12/2018 answer text <p>Yes. HS2 Ltd has identified that part of the Alexandra and Ainsworth Estate is built on piled foundations. As the planned tunnel is approximately 40m deep at this location, there is no risk of the piles intersecting the tunnel. The significant depth also means the ground movement and differential settlement at the surface is likely to be small. A Phase 1 green field ground movement assessment and a Phase 2 ground movement has been undertaken along the route. As these buildings are listed, there will also be a phase 3 assessment, which will take account of the unique features of the building and its foundations.</p><p> </p><p>HS2 Ltd has received no representations on these issues.</p> answering member constituency Wealden answering member printed Ms Nusrat Ghani question first answered 21/12/2018 12:32:00 answering member 4460 label Biography information for Ms Nusrat Ghani
tabling member	4518 label Biography information for Tulip Siddiq

1027618

registered interest
date	18/12/2018
answering body	Department for Transport
answering dept id	27
answering dept short name	Transport
answering dept sort name	Transport
hansard heading	High Speed 2 Line
house id	1
legislature	25259 pref label House of Commons
question text	To ask the Secretary of State for Transport, whether the nominated undertakers are (a) aware of the unique foundations of the Alexandra and Ainsworth estate in South Hampstead, (b) taking steps to survey the estate individually and (c) planning for mitigation measures including but not limited to (i) compensation grouting, (ii) underpinning and (iii) jacking to ensure the stability of the foundations of the estate as set out in Phase 3 Clause 6 of HS2 Information Paper C3.
tabling member constituency	Hampstead and Kilburn
tabling member printed	Tulip Siddiq
uin	203359
answer	answer is ministerial correction date of answer 21/12/2018 answer text <p>(a) Yes. HS2 Ltd has identified that part of the Alexandra and Ainsworth Estate is built on piled foundations. As the planned tunnel is approximately 40m deep at this location, there is no risk of the piles intersecting the tunnel. The significant depth also means the ground movement and differential settlement at the surface is likely to be small. A Phase 1 green field ground movement assessment and a Phase 2 ground movement has been undertaken along the route. As these buildings are listed, there will also be a phase 3 assessment, which will take account of the unique features of the building and its foundations.</p><p> </p><p>HS2 Ltd has received no representations on these issues.</p><p> </p><p>(b) Yes, HS2 Ltd has identified that part of the Alexandra and Ainsworth estate is built on piled foundations. The building will be subject to a survey in accordance with Information Paper C3 which forms part of the High Speed Rail (London to West Midlands) Act 2017.</p><p><strong> </strong></p><p><strong> </strong></p><p>(c) The ground movement at the building, using conservative volume loss assumptions, is between 1 and 7mm. In practice the experience of driving tunnels on Crossrail and HS1 in similar ground conditions demonstrates that the tunnels will be driven to a lower volume loss resulting in less movement. The tunnel boring machines specified for HS2 are high performance machines designed to minimise ground movement at source. This means there should be no need for the mitigations referred to.</p> answering member constituency Wealden answering member printed Ms Nusrat Ghani question first answered 21/12/2018 15:32:18 answering member 4460 label Biography information for Ms Nusrat Ghani
tabling member	4518 label Biography information for Tulip Siddiq