Temporary Works Capability Statement by Ayesa Engineering

Temporary Works Solutions

Delivering intelligent, integrated solutions from design to completion

About Ayesa

791m+ Revenues

80+ Multidisciplines

World Rankings

#45

Top 225 International Engineering Design Firms (World) 1

#61 Global 150 Design Firms 1

#8 Top 10 By Region (Latin America) 1

#11 Top 50 Geotechnical Consultants (UK) 2

#16 Top 20 Global Water Supply 3

#26 Top 30 Sewer and Solid Waste3

#24 Top 30 Transportation 3

#35 Top 40 Industrial Process3

#35 Top 40 Oil & Gas3

#74 WA100, World Architects Survey BD Online 2024

#2 IT Consulting Firms (Spain) 4 Financial Times Top Employers in Europe

1 ENR Rating: Top 225 International Engineering Design Firms 2023 (according to revenue)

2 Geplus.co.uk Ground Engineering Magazine’s top 50 UK Geotechnical Consultants (according to UK revenue)

3 ENR Global Sourcebook 2023

4 Eraneos & Whitelane report 2023

Ranked #1 by 285 clients in Spain according to Eraneos & Whitelane report

A global leader in technology and engineering services

Over the past six decades, Ayesa has delivered iconic, large-scale projects across the globe while adhering to its core principles of people centricity, leaving lasting positive impacts, and commitment to end-to-end lifetime partnerships. Today, the company is a global provider of technology and engineering services, with expertise in over 70 disciplines and an active presence in more than 40 countries.

Ayesa’s strategic expansion across various sectors and international geographic regions has significantly contributed to its growth, earning it a place in the world’s top 50 international engineering design firms, where it is ranked top 24 for global transportation, top 20 for global water supply, and a top 5 IT service provider in Spain.

Ayesa employs over 13,000 professionals who engage in cross-disciplinary collaboration, leveraging their collective experience, insights, and best practices.

Our people are committed to developing infrastructure solutions that pave the way for a more sustainable, energyefficient, and digitally advanced world.

We deliver performance and value for clients, stakeholders, employees, and communities.

Multidisciplinary Engineering Consultants

Water & Environment

Marine & Coastal

// Environment and Sustainability

// Flooding and Rivers

// Waste Management

// Dams, Reservoirs and Major Water Infrastructure

// Drainage, Groundwater and Irrigation

// Water Conveyance and Distribution

// Water Resource Management

// Water Treatment and Desalination

// Ports & Harbours

// Marine Structures

// Coastal Modelling & Engineering

// Marinas & Waterfronts

// Subsea Pipelines

Buildings & Cities

// Arts and Culture

// Education

// Healthcare and Research

// Heritage and Conservation

// Office and Commercial

// Residential and Hotels

// Sports and Leisure

// Technology and Data Centres

// Urban Planning and Landscaping

Energy

// Liquefied Natural Gas (LNG)

// Pipelines

// Production Facilities

// Refining Facilities

// Storage and Terminals

Transportation

// Solar Energy

// Onshore and Offshore Wind Power

// Biomass

// Hydroelectric Power

// Hydrogen and Renewables Gases

// Energy Storage

// Thermal Generation

// HV Transmission and Distribution

Industry

View Sector

// Airports

// Bridges and Structures

// Highways and Roads

// HSL, Railways

// Land Management

// Metros, LRT and Tramways

// Stations and Terminals

// Transportation Systems

// Tunnels and Underground Spaces

Services

// Logistics Plants and Distribution Centres

// Metallurgical and Transformation Plants

// Agri-Food Plants

// Mining Facilities

// Chemical and Petrochemical Plants

// Yeast and Life Sciences

// Planning and Consulting

// Investigation, Assessment and Modelling

// Engineering Design and Architecture

// Construction and Project Management

Consultancy

// Digital Engineering and Engineering 4.0

// Environment, Climate and Sustainability

Working with us

Bridging the Gap

We excel in project management and supervising construction phases across the entire project lifecycle. We help clients “bridge the gap” across all relevant stakeholders, supported by our holistic understanding of needs, constraints, opportunities, and objectives.

Local Relationships & Networks

Getting a project off to the right start and mitigating any delays helps keep costs down. Our team has forged close working relationships with environmental authorities and regulators throughout the regions we operate in, enabling us to expeditiously progress projects through permitting, construction, verification, and site closure.

Innovation, Sustainability

We offer innovation with a deep understanding of environmental issues such as climate change and sustainability, waste to energy, and renewables to deliver maximum value to clients.

Proven Track Record & Trust

We have extensive experience across a wide range of sectors. We currently sit on several frameworks, such as Irish Water, Port of Cork, Oil and Pipeline Agency, Waterways Ireland, Gas Networks Ireland, Irish Rail, Fusion 21, and Translink.

Client Partnership

Our culture focuses on building solid relationships with clients who continue to select us for the significant benefits we provide. We work with public and private sectors, from large companies and national regulatory bodies to smaller organisations. Our priority is always technical excellence, partnership and lasting impacts.

Technical Excellence

We help keep our clients informed on new regulations and engage with stakeholders to move projects forward profitably and align with environmental goals. Our proactive approach helps clients benefit from our expertise in a constantly changing regulatory environment.

Safety First

We advance safety, applying rigorous processes that manage technical, environmental and social risks and hold ISO 45001:2018 – the internationally recognised standard for occupational health and safety management systems.

Multi-Disciplinary

We provide engineering and design consultancy services across multiple sectors: marine and coastal, geoscience, buildings, transportation, energy, environment, water, flooding, waste management, and conservation.

Lasting Positive Impacts

We offer the highest design standards, project management, and stakeholder collaboration to achieve optimum project solutions. Our engineering consultants are among the very best in their fields. Continuous involvement in challenging projects maintains and enhances our high standards of technical excellence.

An End-to-End Partner

We aim to build strong relationships with our clients and provide them with exceptional care. We strive to assist our clients in achieving their desired results, delivering value and positive impacts. Our agile and responsive global teams create a collaborative framework across stakeholders for project success, combining local knowledge and experience with international best practices.

People-Centric

At Ayesa, we prioritise our staff’s development to ensure a positive, enriching, safe, and empowering work experience. We are committed to fostering equality, diversity, and inclusion in our workplaces to create an environment where everyone can thrive. We invest significantly in training and development to keep our staff at the forefront of their industry. As a leading engineering consultant, we aim to positively impact the Sustainable Development Goals (SDGs) most relevant to us, such as reducing CO2 emissions, promoting water conservation, creating social value, enhancing health and wellbeing, engaging with communities, providing apprenticeships, and maintaining a safe working environment.

GLOBAL AWARDS & RECOGNITION

Organisation Category

RISE

Partnership Category, Network Rail, Murphy, Geobear

BCIA New Civil Engineering International Project of the Year, Uisce Eireann, Ward&Burke, Ayesa, Clancy Moore

BICA New Civil Engineering Transport Project Award: Riverlinx CJV, Riverlinx CJV & Cowi/Arup/Ayesa/Gall Zeidler

BCIA New Civil Engineering Transport Project Award: Network Rail, Murphy, Murphy

RIAI

AAI

Winner Public Buildings Award

Public Choice ranked #2 Buildings in Ireland

Sustainability Award

The Downes Medal, Most significant architectural work completed

ICE North West Civil Awards Geotechnical Project >£1 million, Ayesa, Network Rail, Murphy, Geobear

Ground Engineering Awards UK Project with a Geotechnical Value of between £500K and £1M

Caminos Madrid awards Associatin of Civil Engineers - Best Project

World Football Summit Awards Stadium of the Year

Offsite Awards

Best Use of Hybrid Technology through MTX (Contractors)

RICS Infrastructure Category / National Shortlist / Transport For London

RICS London and Southeast Regional Heritage Winner

Royal Society Ulster Architects Conservation Award 2024 / Ayesa, Hall Black Douglas Architects & JCA Architects

Ground Engineering Awards Geotechnical Project up to £3m / Murphy/Network Rail

Ground Engineering Awards Workforce awards: L & D Leader

Irish Construction Excellence Fit Out/Refurbishment Over €30m through PJ Hegarty

ITA World Tunnelling Awards Young Tunneller of the Year 2023

ITA World Tunnelling Awards Technical Innovation: TBM Launch and Rotation through Riverlinx CJV

New Civil Engineering Tunnelling Awards: Tunnelling Project of the Year (over $200M) through CJV

BCIA New Civil Engineer Temporary Works Initiative of the Year, through CJV

The National Construction Excellence Awards UK: Value Award & People Mentoring Award, through Galliford Try

Irish Construction Excellence Commercial > €60m through PJ Edwards

Irish Construction Excellence Civil Engineering >€20m through Murphy International

Irish Concrete Society Major Infrastructure, Ayesa & Coffeys

Irish Concrete Society Buildings & National Award Winner: through PJ Edwards

ICE Judges Silver Award, Commercial Project €10-€60m, through PJ Edwards & Walls

ENR

EN Awards

BCO

Global Best Projects: Best Rail / Transit EPC

Best International Venue: Ranked Top 5 in world

Retrofit Awards Refurbished / Recycled

RSUA Conservation Award through Hall Black Douglas Architects with JCA architects

iStructE Ireland

Conservation Award

AJ Architecture Awards Project of the Year

Ground Engineering Awards The Editors Award: Ayesa, Network Rail and Bam Ritchies

Ground Engineering Awards Geotechnical Team of the Year: Ayesa, COWI, Riverlinx CJV

Ground Engineering Awards Geotechnical Project of the Year: Ayesa, COWI, Riverlinx CJV

New Civil Engineer Tunnelling Awards: Ayesa /Riverlinx CJV / Innovation in Shaft Design & Construction

Ground Engineering Awards Rising Star Award

New Civil Engineer Techfest Awards: Transportation infrastructure Champion, Adif, Red.es, Vodafone

World Travel Awards

UKSTT Awards

Mexico & Central America’s Leading Meetings & Conference Centre

United Kingdom Society for Trenchless Tunnelling

Irish Construction Industry Engineering Firm of the Year

Environmental Analyst Brownfield Awards with Deep Oil Mixing

CHIT Award

International Project Award Winner, Engineering and Geotechnical Design Services

ICE Project of the Year, Ayesa, Cork County Council, RPS, PJ Hegarty & Sons, DAFM

ICE

Partnership Awards

Engineers Ireland

European Union Prize

ENR

Architizer

Civic Trust Awards

RIBA

BCIA

Local Project of the Year: Ayesa, Cork County Council, RPS, PJ Hegarty & Sons, DAFM

Best Road, Bridge, or Tunnel Project

Engineering Project of the Year

EU Mies Nominee: Contemporary Architecture

Global Best Airport / Port category

Government Building Category Architizer A+ Award

AABC Conservation Award

Stephen Lawrence Prize

UK Prime Minister Awards Finalist, Top 3

Construction Excellence Restoration Awards Finalist,

RICS West Midlands

LABC Building Excellence

ICE London

LABC Building Excellence

Georgian Group

ACE-RIBA Awards

RICS Awards

Better Healthcare Awards

Georgian Group

Wood Awards

Natural Stone Craft

Georgian Group

Natural Stone Awards

City Heritage Awards

NHS Building Better

Building Conservation

Best Small Housing Development

Civil Engineering Awards

Best Domestic Extension

Architectural Awards Restoration of a Georgian Church

Award for Religious Architecture

Building Conservation

Special Judges Award

Architectural Awards

Best Use of British Timber

Monuments

Architectural Awards: Restoration of a church

Craftsmanship

City Heritage

Hospital/Healthcare - Best Patient Environment

2025

Project Name

Grange Over Sands Emergency Embankment Repair

Arklow Wastewater Treatment Plant, IE

Silvertown tunnel, UK 2025

M62 Bridge Reconstruction

Arklow Wastewater Treatment Plant, IE

Arklow Wastewater Treatment Plant, IE 2025

Arklow Wastewater Treatment Plant, IE 2025 HIGHLY COMMENDED

Grange Over Sands Embankment & Track Repair, UK

Real Madrid FC Stadium Bernebeu, Spain

Northwick Park Hospital Rooftop A&E expansion, UK

Bank Station Capacity Upgrade, UK

Old Curiosity Shop, UK

2024

Primark Bank Buildings, Belfast UK

Aylesbury Culvert, UK

Competency Framework, UK

Tropical Fruit Warehouse (Tiktok HQ), IE

Claudio Cabral, Head of Ground Engineering, Ayesa

Riverlinx Silvertown Tunnel, UK

Riverlinx Silvertown Tunnel , UK

HM Prison Highdown, B to C-category, Construction Mentoring Partnering Scheme (CMPS) UK

Charlemont Square Development, IE

Stillorgan Reservoir Upgrade, IE

Blanchardstown Regional Drainage Scheme, IE

ESB Headquarters, Project Fitzwilliam, IE

Cadenza – Earlsfort Terrace, IE

Follo Line, Norway

Panama Convention Centre, Panama

Bridge House, London, UK

Primark Bank Buildings, Belfast, UK

2022 WIN Wadhurst Cutting, UK

2022 FINALIST

2022 WIN

2022 FINALIST

2022

Riverlinx Silvertown Tunnel, UK

Secant Pile Peanut Shaft Innovation, RIverlinx Silvertown Tunnel, UK

Jack Green, Guildford Office, UK

Maria Zambrano Station, Malaga, AI, AR, Digital Twin Applications, Spain

Panama Convention Centre, Panama

2021 WIN Liffey Siphons Rehabilitation Scheme with Terra Solutions & Irish Water, IE

2021 FINALIST N/A

2021 FINALIST

HS2 Ground Stabilisation Project, UK

2020 WIN Doha Metro, Red and Green Lines, Qatar

2020 WIN Haulbowline East Tip Remediation Project, IE

2020 WIN Riverlinx Silvertown Tunnel, UK

2019 WIN Haulbowline East Tip Remediation Project, IE

2019 FINALIST Cordoba Palace City of Justice, Spain

2019 WIN International Airport of Tocumen Expansion (32 projects from 23 countries), Panama

2018 WIN Cordoba Palace City of Justice, Spain

2018 WIN

St. Mary At Quay, Ipswich, UK

2017 WIN House Boat, Poole Harbour, UK

2016 FINALIST

2015 FINALIST

2012

2012 FINALIST

Gobbins Pathway, UK

14 Church Street, Hereford, UK

St. Patrick’s, 21A Soho Square, London W1, UK

2011 WIN Lower Turnant Farm, Herefordshire, UK

2011 WIN

2010 RUNNER-UP

2009

2008

2007

2006

2006 WIN

2005

2004 WIN

St. George’s Church, Hanover Square, UK

St. Peter’s Church, Peterchurch, UK

West Hampstead Synagogue, UK,

White Lodge Centre, Holloway Hill, Chertsey, UK

St. Lawrence, Mereworth, UK

St. George’s Church Bloomsbury, UK

St. George’s Church Bloomsbury. UK

St. Bartholomew’s Hospital, UK

Temporary Works Consulting

At Ayesa, we believe one of the greatest risks in construction lies in partially erected or partially demolished structures. That’s why we apply rigorous engineering, coordination, and quality assurance to ensure temporary safety and stability across a wide range of sectors and structural conditions.

Intelligent Temporary Works across all types of projects for tier one contractors, public and private clients, and developers.

We provide bespoke and standardised temporary works designs for projects that need deep excavations, tunnelling, structural propping, crane platforms, working access, and construction staging.

Civil Experts: From Rail to Road to Land and Sea: Our expertise covers every facet of civil infrastructure: highways, bridges, and transportation hubs; complex buildings both onshore and offshore; and demanding environments such as tunnels, deep basements, and marine structures.

Multidisciplinary: With multidisciplinary capabilities spanning civil, geotechnical, marine, and structural engineering, we collaborate with contractors, developers, and public sector clients to de-risk construction, streamline buildability, and deliver cost and programme certainty.

Geotechnical Works

Excavation & Structural Systems

• Shaft support systems

• Basement excavations

• Launch/reception shafts

• Temporary lining systems

• Retaining structures

• Temporary retaining structures

• Slope stabilisation

• Steepened slope earthworks

• Soil nailing

Temporary works aren’t just a necessity — they’re an opportunity. With intelligent design, we help clients gain a competitive advantage and deliver value, by improving constructability, sequencing, and safety.

• Temporary embankment stability assessment (for falsework, piling, cranes)

• Settlement assessments due to temporary excavations / dewatering / microtunnelling

• Dewatering systems

• Ground improvement works

Utilities & Service Interfaces

• Utilities & drainage interfaces

• Temporary utility diversions

• Deep drainage and culvert crossings

• Service protection strategies

Working Platforms

• Ground improvement works

• Piling platforms

Temporary Works at a glance

Transportation & Highways

Temporary Bridge & Highway Structures

• Temporary bridge supports and bearing arrangements

• Temporary compounds

• Highway and bridge loading assessments

• Bridge falsework support

• Temp bridge precast beam stability

• Road and junction staging for phased construction

• Temporary junction/highway alignments

• River and highway crossing structures

• Cut-and-fill sequencing and slope reinforcement

Temporary Works Compliance

• Full compliance with CDM 2015, including Principal Designer support

• Operates under ISO-certified QHSE systems:

– ISO 9001 (Quality)

– ISO 14001 (Environmental)

– ISO 45001 (Occupational Health & Safety)

• All Temporary Works designed in alignment with BS 5975, including:

– Category 1, 2, and 3 (CAT III) independent checks

– CAT III checks for temporary structures, earthworks, and drainage

• Robust internal oversight from Ayesa’s Quality, Health, Safety & Environment (QHSE) team

• Formal appointment of Temporary Works roles as required:

– Temporary Works Designer (TWD)

– Temporary Works Coordinator (TWC)

– Temporary Works Supervisor (TWS)

• BIM Level 2 integration, including 3D modelling and clash detection

• Comprehensive design risk assessments with hazard elimination and risk reduction strategies

• Environmental management planning and performance monitoring embedded across project phases

• Detailed Construction Phase Planning, including interface management with Permanent Works

Site Logistics & Access

• Traffic management and diversions

• Temporary haul roads

• Temporary compounds

• Access platforms and working areas

• Temporary laydown and storage areas

• Temporary works for tight urban spaces and tunnelling

Stability & Movement Assessments

• Embankment phasing and ground stability

• Cofferdams, retaining walls, crane platforms for underpasses and interchanges

• Assessment of railway track movement due to adjacent works

• Ground improvement works

• Highway and bridge loading assessments

Drainage & Utilities

• Drainage runs

• Temporary utility service diversions

Buildings & Civil Infrastructure

Temporary Works for Structures

• Façade retention

• Structural propping

• Formwork and falsework systems

• Excavation support

• Buried service protection

• Temporary fencing

• Temporary crash deck structures

• Temp slab support for utility protection

Platforms & Access

• Crane and piling platforms

• Working platforms

• Plant access areas

• Temporary laydown and storage areas

Marine & Coastal Temporary Works

• Temporary jetties and cofferdams

• Marine platform access

• Edge protection

• Plant staging

Ayesa provided temporary and permanent works design for the Wilton tunnel portal — the northern entry to a 38 km polyhalite transport tunnel in North Yorkshire. Our scope included retaining walls, tension piles, propping, capping beams, drainage systems, and ground anchors. When dry ground conditions were confirmed, we revised the design to use contiguous piles, eliminating primary piles — saving time, reducing materials, and accelerating the programme in close coordination with the contractor.

North Yorkshire Polyhalite Project – Wilton Portal (UK), Client: Sirius Minerals | Value: £2.5 billion

Why Ayesa?

• Multidisciplinary Expertise

We combine civil, structural, geotechnical, and marine engineering to deliver fully coordinated, safety-led designs — all under one consulting firm.

• Buildability and Sequencing Insight

Our team understands construction from the ground up. We design practical, buildable solutions that simplify logistics and improve programme delivery.

• Smart Interfacing with Permanent Works

As permanent works designers too, we anticipate clashes, reduce rework, and streamline handovers between temporary and permanent systems.

• Value Engineering

We regularly identify smarter, leaner design alternatives — helping contractors reduce cost, risk, and time on site without compromising safety.

• Health and Safety is embedded into every stage of our engineering service provision

We operate a certified ISO 45001 Occupational Health & Safety Management System, and our teams follow rigorous internal governance protocols to ensure the highest safety standards are consistently met across all projects in the UK. We fully align with the Construction (Design and Management) Regulations 2015 (CDM 2015) and regularly support clients in fulfilling their legal duties under the regulations, including taking on the role of Principal Designer. In temporary works, where site safety and structural stability are especially critical, our designs prioritise safe buildability, sequencing, and coordination with all duty holders.

• Proven Track Record across Tier ones and Complex major projects

Ranked #11 in the Geoplus.co.uk Top 50 Geotechnical Consultants, we’ve delivered successful temporary works on major projects like the M3/M4 Smart Motorways, A9 Dualling, A465 Heads of the Valleys, and N5 Turlough and major civil infra structure in the UK and Ireland including Stepney Crossrail and the Silvertown Tunnel.

• Award-winning Geotechnics & Multdisciplinary Projects

Ayesa and its partners have received more than 40 national and international awards and commendations across the UK, Ireland, and globally since 2021—celebrating engineering excellence in water, energy, transport, healthcare, conservation, geotechnics, and iconic architecture, with standout wins including the RIAI Public Buildings Award, the Downes Medal, BCIA’s Tunnelling Project of the Year, and temporary works initiative of the year through the Riverlinx CJV.

A top 15 UK Geotechnical Consultant by revenue (GE:100 2024)

Transportation

Temporary works are fundamental to the successful delivery of transportation infrastructure. From bridge construction and motorway upgrades to rail interfaces and complex junctions, temporary works provide the structural stability and access required to safely build permanent assets — often in live, high-risk environments.

At Ayesa, we bring specialist expertise in designing and coordinating temporary works. Our team supports Tier 1 contractors, joint ventures, and transport authorities across the UK and Ireland with safe, pragmatic, and buildable solutions tailored to each site’s constraints and programme.

Our role typically begins early — identifying risks and requirements, coordinating with permanent works designers, and optimising sequencing. Through intelligent temporary works design, we help reduce disruption, shorten construction timescales, and deliver significant value on complex infrastructure schemes.

Key Capabilities:

• Temporary structural support for bridge beams, decks, abutments, and retaining walls

• Complex embankment staging and cut/fill sequencing

• Falsework and formwork for highway structures and parapets

• Temporary river or road crossings and haul routes

• Traffic diversions and live carriageway support

• Crane and piling platforms for constrained sites

• Dewatering strategies for cuttings and underpasses

• Utility protection and diversions during phased works

• Smart motorway construction staging and interface management

• Full CDM 2015 alignment and support for Principal Designer role

Utility Diversions & Protection

Ayesa provides temporary works solutions to safely manage utility diversions during infrastructure construction. Our designs support the protection, relocation, or over-pumping of live services — including water, gas, electricity, telecoms, and drainage — while enabling excavations, road realignments, and structural works to proceed. We design trench supports, temporary bridges, haul road crossings, and protection measures to ensure service continuity, minimise disruption, and meet safety and regulatory requirements. Our expertise ensures utility diversions are well-integrated into the overall construction sequence and delivered with minimal risk to programme.

A465 Heads of the Valley | Costain

Safety is critical and TW must experience and foresight.

As part of the upgrade to the A465 Heads of the Valleys appointed by Costain to design temporary works that steep, hilly terrain. Our team designed soil nails and temporary beneath the existing road, ensuring safety during construction.

To safeguard road serviceability, Ayesa assessed slope monitoring strategy — allowing real-time checks to confirm designed.

must be engineered with precision,

temporary netting to stabilise cut slopes construction.

slope movements and defined a tailored confirm the system was performing as

N5 Westport to Turlough - TW Designs, Ireland

M7 Widening & Sallins Bypass, Ireland

A6 Dualling - Randalstown to Castledawson N. Ireland

Valleys route in South Wales, Ayesa was that would enable safe road widening through

Delivering Smarter Temporary Works Across National Road and Highway Schemes

Ayesa has delivered temporary works designs across a wide range of major highway and road schemes, including the A9 Dualling Kincraig to Dalraddy, M7 Widening & Sallins Bypass, N5 Westport to Turlough, N4 Collooney to Castlebaldwin, A465 Heads of the Valleys, A690 Durham, and A1 Craighall, as well as supporting key smart motorway and improvement projects such as the M3 & M4 SMART Motorways, M8/M73/M74 Improvements, and M74 Junction 5 Raith.

• Adaptable designs that respond to real-time site conditions

• Accelerated programme through practical, buildable temporary works

• Reduced construction costs via valueengineered solutions

• Improved on-site safety with compliant access and protection systems

• Streamlined delivery with integrated geotechnical, structural, and traffic designs

• Minimised disruption through effective staging and temporary traffic layouts

• Optimised construction sequencing through early engagement and coordination

• Single-source support for a wide range of temporary works requirements

As part of the upgrade to the A465 Heads of the Valleys appointed by Costain to design temporary works that would steep, hilly terrain. Our team designed soil nails and temporary beneath the existing road, ensuring safety during construction.

Ayesa

A690 Landslip - Kepier Lane Durham | BAM

M8_M73_M74 Improvement scheme Part 2, M74 junction Raith

N5 Westport to Turlough, Ireland

N5 Ballaghaderreen to Scramoge Road

M8, M73 & M74 Motorway Improvement SchemePart 3 Mainline Works

Valleys route in South Wales, Ayesa was would enable safe road widening through temporary netting to stabilise cut slopes construction. movements and defined a tailored confirm the system was performing as

A1 Craighall, Scotland | John Paul Construction

M62 Bridge, Rochdale | Network Rail

M8 Baillieston to Newhouse Improvements

Deep Excavation, Basements & Tunnelling

Deep excavations present some of the most technically complex and risk-sensitive challenges in construction — particularly in urban, constrained, or geologically variable environments. At Ayesa, we provide robust and engineered temporary works solutions to enable deep basements, shafts, underpasses, and drainage works to proceed safely and efficiently. Our engineers have extensive experience designing temporary retention systems for deep excavations in both soil and rock. Each excavation is unique — shaped by depth, ground conditions, adjacent structures, site access, and tolerable movements. We adopt an integrated geotechnical and structural approach, using advanced soil-structure interaction modelling to assess and mitigate risks, protect surrounding assets, and optimise construction staging.

Experience Includes:

• Excavation support for rail and metro shafts

• Temporary works for underground stations and basements

• Diaphragm walls, secant, sheet, and king post systems

• Slope stabilisation and temporary faces

• Impact assessment and real-time monitoring

• Temporary retaining wall design

• Shaft and tunnel access support

• Basement excavation staging

• Groundwater control and dewatering

• Soil nails, anchors, struts and propping

• Structural impact assessment and instrumentation planning

• Geotechnical modelling (PLAXIS, FLAC, MIDAS)

C305” C305”

Crossrail Stepney Green | Dragados-Sisk JV

Crossrail Eastern Running Tunnels temporary supports for Cross Passages

Deephams Shaft | Murphy Group

Buildings & Civil

Infrastructure

Temporary works are an essential part of the construction process, undertaken before permanent construction can begin. The efficient design and integration of temporary works solutions have the potential to deliver substantial cost and programme savings for large building projects.

• Ayesa engineers work closely with building contractors to understand their preferred construction techniques and to develop temporary works solutions that fit hand-in-hand with these methodologies. We regularly suggest and design alternative permanent works that, when integrated with smart temporary works, streamline the overall construction project.

• As well as temporary structural support, Ayesa is experienced in providing earthworks support, crane and piling platforms, working platforms, temporary traffic diversions, utility diversions, environmental plans, dewatering or other bespoke requirements.

• With our specialist skills in geotechnics, structural and civil engineering, our consultants can manage the entire building construction process from bespoke temporary works to permanent works supervision.

• We combine our seasoned construction experience withrigorous design processes to prioritise safety.

• Our temporary works designs can often provide a competitive advantage for our clients by developing intelligent solutions.

22 Bishopsgate: Originally conceived as The Pinnacle, construction of this London skyscraper halted in 2012, leaving a partially built basement and core. When the scheme was later revived and redesigned as 22 Bishopsgate, a 62-storey commercial tower, Ayesa was commissioned to design the temporary core support system.

Working within the constraints of the existing structure, we developed a bespoke transfer solution using five retained steel columns to safely support the new core during construction. Our team designed and coordinated a complex grid of temporary walls between the basement and ground floor, all while demolition works were ongoing.

Outcome: Our solution enabled the new core construction to begin six months earlier, accelerating the programme and generating significant value for the project team.

Royal Mint Gardens, Temporary Works Design

Lee Road Water Treatment Plant Cork, Irish Water

Silvertown Tunnel, Riverlinx CJV

Ayesa played a vital role as one of the principal underground structural designers for the £2 billion Silvertown Tunnel in London, delivered by Riverlinx CJV for Transport for London

Scope & Temporary Works Responsibilities

Designed cut-and-cover tunnels, TBM launch shafts—including the award-winning “Peanut Shaft”—and transition chambers. Engineered temporary embedded walls (sheet piles, secant piles, diaphragm walls) to support excavation and launch structures

Developed bespoke shaft solutions enabling the UK’s largest tunnel boring machine (“Jill”) to be launched, rotated, and retrieved underground

Ayesa Manchester Suite 4, Block F, St James’s Bldg, 79 Oxford St, Manchester M1 6FQ, United Kingdom +44 161 826 5993

Ayesa Guildford Portsmouth House, 1 Portsmouth Road, Guildford, Surrey GU2 4BL United Kingdom +44 1483 511247

Ayesa Belfast 1 College House Citylink Business Park, Belfast BT12 4HQ, United Kingdom +44 28 9031 1100

Ayesa Dublin Centrepoint Business Park, H5, Oak Rd, Dublin 12, D12 VW27

Ireland +353 1 456 4370

Ayesa Galway Block 10, Parkmore Rd, Galway Technology Park, Co. Galway, H91 P2HC Ireland +353 (0) 91 739 366

Ayesa is a global

turnover of 717 million

revenue. ayesa.com/en