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Paddington Square

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Paddington Square

Client

Great Western Developments and Sellar Paddington

Architect

Renzo Piano

Engineer

WSP

Structural Engineer

Contractor

Mace

Location

Paddington, London

Sector

Commercial

Services

Substructures

Design

Stakeholders

Project Value

Related projects

Project Overview

Appearing to float above the ground floor, Paddington Square was designed by world-famous architect Renzo Piano. Consisting of 22 storeys of office, retail and dining spaces, the £825 million development required our temporary works and temporary core stability expertise.

Together with demolition contractors Erith and Expanded Piling, we were awarded the basement and core packages for Paddington Square and the adjacent station ticket hall.

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This project was unique in that the inclined columns and supported floor slabs needed to be erected on one side at first, followed by the other side. To mitigate the significant asymmetrical lateral loads on the core in the temporary condition, an innovative design and construction sequence was devised.

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Design

Technical Innovation

Deciding how to strengthen the core to sustain the out of balance forces, along with a tower crane load on top, was the first step. To do this, the team developed five sophisticated computer models showing the forces the core would be subject to throughout the critical stages of the construction process.

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A stepped construction sequence with limits on the lag between the steel framed superstructure construction on either side of the core, along with additional reinforcement within the core, proved to be the answer. Additionally, this solution allowed for optimisation of the temporary works and the steel frame erection process, resulting in significant programme savings.

Collaboration

A collaborative group by the three specialists during the preconstruction stages resulted in seamless on-site delivery and programme efficiency.

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The excellent planning of site excavation works by Erith, which allowed large volumes of material to be rapidly removed from site, provided programme certainty for our works to the substructure and primary core. Additionally, Expanded’s piling works were successfully completed to enable the excavation of the basement to begin.

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We also engaged with the City of Westminster early on and produced a joint delivery strategy that significantly reduced site congestion through logistics and traffic management.

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Complex Basement Works

Sophisticated basement works over four levels involved part “top down” construction methodology and the use of permanent and temporary plunge columns. The installation of temporary secant piled walls enabled the bulk excavation works from a single access point.

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Part of the site remained “blue sky” to maximise the removal of excavated material and to allow the primary core to be slipped from basement level.

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Precast

Precast “twin wall” panels to the second core were delivered on a just time basis for installation, reducing congestion on site as well as programme delivery time. By using a slipform method, the finish on the primary core was exceptional.

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click to open

Structures

Collaboration

A collaborative group by the three specialists during the preconstruction stages resulted in seamless on-site delivery and programme efficiency.

‍

The excellent planning of site excavation works by Erith, which allowed large volumes of material to be rapidly removed from site, provided programme certainty for our works to the substructure and primary core. Additionally, Expanded’s piling works were successfully completed to enable the excavation of the basement to begin.

‍

We also engaged with the City of Westminster early on and produced a joint delivery strategy that significantly reduced site congestion through logistics and traffic management.

‍

Complex Basement Works

Sophisticated basement works over four levels involved part “top down” construction methodology and the use of permanent and temporary plunge columns. The installation of temporary secant piled walls enabled the bulk excavation works from a single access point.

‍

Part of the site remained “blue sky” to maximise the removal of excavated material and to allow the primary core to be slipped from basement level.

‍

Precast

Precast “twin wall” panels to the second core were delivered on a just time basis for installation, reducing congestion on site as well as programme delivery time. By using a slipform method, the finish on the primary core was exceptional.

‍

‍

click to open

Collaboration

A collaborative group by the three specialists during the preconstruction stages resulted in seamless on-site delivery and programme efficiency.

‍

The excellent planning of site excavation works by Erith, which allowed large volumes of material to be rapidly removed from site, provided programme certainty for our works to the substructure and primary core. Additionally, Expanded’s piling works were successfully completed to enable the excavation of the basement to begin.

‍

We also engaged with the City of Westminster early on and produced a joint delivery strategy that significantly reduced site congestion through logistics and traffic management.

‍

Complex Basement Works

Sophisticated basement works over four levels involved part “top down” construction methodology and the use of permanent and temporary plunge columns. The installation of temporary secant piled walls enabled the bulk excavation works from a single access point.

‍

Part of the site remained “blue sky” to maximise the removal of excavated material and to allow the primary core to be slipped from basement level.

‍

Precast

Precast “twin wall” panels to the second core were delivered on a just time basis for installation, reducing congestion on site as well as programme delivery time. By using a slipform method, the finish on the primary core was exceptional.

‍

‍

click to open

Collaboration

A collaborative group by the three specialists during the preconstruction stages resulted in seamless on-site delivery and programme efficiency.

‍

The excellent planning of site excavation works by Erith, which allowed large volumes of material to be rapidly removed from site, provided programme certainty for our works to the substructure and primary core. Additionally, Expanded’s piling works were successfully completed to enable the excavation of the basement to begin.

‍

We also engaged with the City of Westminster early on and produced a joint delivery strategy that significantly reduced site congestion through logistics and traffic management.

‍

Complex Basement Works

Sophisticated basement works over four levels involved part “top down” construction methodology and the use of permanent and temporary plunge columns. The installation of temporary secant piled walls enabled the bulk excavation works from a single access point.

‍

Part of the site remained “blue sky” to maximise the removal of excavated material and to allow the primary core to be slipped from basement level.

‍

Precast

Precast “twin wall” panels to the second core were delivered on a just time basis for installation, reducing congestion on site as well as programme delivery time. By using a slipform method, the finish on the primary core was exceptional.

‍

‍

Collaboration

A collaborative group by the three specialists during the preconstruction stages resulted in seamless on-site delivery and programme efficiency.

‍

The excellent planning of site excavation works by Erith, which allowed large volumes of material to be rapidly removed from site, provided programme certainty for our works to the substructure and primary core. Additionally, Expanded’s piling works were successfully completed to enable the excavation of the basement to begin.

‍

We also engaged with the City of Westminster early on and produced a joint delivery strategy that significantly reduced site congestion through logistics and traffic management.

‍

Complex Basement Works

Sophisticated basement works over four levels involved part “top down” construction methodology and the use of permanent and temporary plunge columns. The installation of temporary secant piled walls enabled the bulk excavation works from a single access point.

‍

Part of the site remained “blue sky” to maximise the removal of excavated material and to allow the primary core to be slipped from basement level.

‍

Precast

Precast “twin wall” panels to the second core were delivered on a just time basis for installation, reducing congestion on site as well as programme delivery time. By using a slipform method, the finish on the primary core was exceptional.

‍

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08
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