Project Overview

The retaining wall construction project in Sunbury-on-Thames aimed to address erosion control, flooding prevention, slope stabilization, etc. This project occurred along the riverbank, ensuring safety and structural integrity for adjacent properties.

Site Conditions

The initial site presented the following conditions:

1. River Proximity: The site was close to the river, requiring careful water management during construction.
2. Soil Excavation: Significant trench excavation was carried out to prepare the site for foundation work.
3. Public Pathways: Pedestrian diversions were implemented to maintain safety throughout construction.

Stages of Construction

1. Site Preparation and Excavation

• The construction area was secured using safety barriers and pedestrian signs to redirect foot traffic.
• A trench was excavated to accommodate the retaining wall’s foundation and drainage layers.
• Protective sheeting was laid to prevent soil erosion and manage water runoff.

2. Foundation and Formwork

• Timber formwork was constructed to shape the concrete retaining wall base.
• Reinforcement steel bars were installed within the formwork to enhance structural strength.
• The concrete foundation was poured and left to cure, ensuring stability.

3. Wall Reinforcement

• Vertical reinforcements were placed to connect the foundation to the retaining wall structure.
• Timber braces supported the framework during construction to prevent misalignment.

Key Challenges

• Water Management: The proximity to the river necessitated the implementation of waterproof barriers to prevent groundwater infiltration.
• Limited Space: The narrow worksite required meticulous planning to manage machinery, materials, and pedestrian flow safely.
• Public Safety: Ensuring minimal disruption to residents and pedestrians was achieved through effective signage and barrier systems.

Outcome

The retaining wall was successfully constructed to stabilize slopes, prevent flooding, and enhance safety. The project adhered to safety regulations and environmental guidelines, ensuring minimal impact on the surrounding river environment.

Lessons Learned

• Early planning for water control is critical for river-adjacent construction.
• Clear pedestrian management ensures safety and minimizes disruptions.
• Effective reinforcement design ensures long-term structural performance.

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