Developing skills in excavating and locating services operations — City and Guilds of London Institute Vocationally-Related Qualification Construction & Building Services Revision

    This subtopic covers the essential skills and knowledge for conducting excavation work on highways, including preparation, service location, safe digging,

    Topic Synopsis

    This subtopic covers the essential skills and knowledge for conducting excavation work on highways, including preparation, service location, safe digging, and the use of timber earth support systems for shallow trenches. It equips learners with the competence to avoid damaging underground utilities and to comply with health and safety legislation, vital for minimizing disruption and maintaining roadworks safety.

    Key Concepts & Core Principles

    Exam Tips & Revision Strategies

    Common Misconceptions & Mistakes to Avoid

    Examiner Marking Points

    Developing skills in excavating and locating services operations

    CITY AND GUILDS OF LONDON INSTITUTE
    vocational

    This subtopic covers the essential skills and knowledge for conducting excavation work on highways, including preparation, service location, safe digging, and the use of timber earth support systems for shallow trenches. It equips learners with the competence to avoid damaging underground utilities and to comply with health and safety legislation, vital for minimizing disruption and maintaining roadworks safety.

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    Learning Outcomes
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    Assessment Guidance
    3
    Key Skills
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    Key Terms
    3
    Assessment Criteria

    Assessment criteria

    City & Guilds Level 2 Diploma in Construction Occupations – Highways Maintenance (QCF)

    Topic Overview

    The City & Guilds Level 2 Diploma in Construction Occupations – Highways Maintenance (QCF) is a vocational qualification designed for individuals seeking to enter the highways maintenance sector. It covers essential skills such as road construction, drainage systems, traffic management, and the use of plant and equipment. This diploma is part of the Construction & Building Services suite and provides a solid foundation for careers in road maintenance, civil engineering, or further study at Level 3.

    Students will learn about health and safety regulations specific to highways, including the use of personal protective equipment (PPE) and safe working practices near traffic. The course also covers material properties, such as asphalt and concrete, and techniques for repairing and maintaining roads, footpaths, and kerbs. Understanding these concepts is crucial for ensuring public safety and the longevity of transport infrastructure.

    This qualification fits into the wider construction industry by addressing the growing demand for skilled highways maintenance workers. It prepares students for roles such as highways operative, road worker, or traffic management operative, and can lead to apprenticeships or further qualifications in civil engineering. Mastery of this diploma demonstrates competence in practical tasks and theoretical knowledge valued by employers.

    Key Concepts

    Core ideas you must understand for this topic

    • →Health and safety regulations: Understanding the Health and Safety at Work Act 1974, COSHH, and risk assessments specific to highways maintenance, including working near traffic and using plant machinery.
    • →Material properties: Knowledge of asphalt, concrete, and aggregates, including their composition, uses, and how to handle and store them correctly to prevent defects.
    • →Drainage systems: Principles of highway drainage, including gullies, grips, and ditches, to prevent water damage and ensure road safety.
    • →Traffic management: Setting up temporary traffic lights, signs, and barriers in accordance with the Traffic Signs Manual and Chapter 8 of the Safety at Street Works and Road Works Code.
    • →Plant and equipment operation: Safe use of compactors, breakers, and small tools, including pre-use checks and maintenance procedures.

    Learning Objectives

    What you need to know and understand

    • Understand the preparation required for excavating operations in and around highways, Be able to carry out excavating operations in and around highways safely, Understand earth support systems for holes and trenches up to maximum depth of dig 2.0m, Be able to erect and dismantle timber earth support systems for holes and trenches safely

    Assessment Criteria

    Key criteria assessors look for in your portfolio

    • Award credit for demonstrating correct identification of underground service apparatus using cable avoidance tools (CAT and Genny) and interpretation of utility plans before excavation.
    • Evidence of safe excavation technique, including hand-digging near known services and using mechanical plant only in designated safe zones.
    • Demonstrate competence in selecting, erecting, and inspecting timber earth support systems appropriate for trench depths up to 2.0m, in line with HSE guidance.

    Assessment Guidance

    Guidance for achieving higher grades

    • 💡In practical observations, talk through your actions to the assessor, especially when performing safety checks and explaining why you are using specific techniques.
    • 💡For the knowledge assessment, memorise the key dimensions and component names of timber shoring systems as specified in the Construction Industry Training Board (CITB) guidelines.
    • 💡Ensure your portfolio contains clear, dated photographic evidence of you following all stages of a safe excavation and shoring process, annotated with reflective commentary.
    • 💡Always refer to current regulations and codes of practice, such as the Health and Safety at Work Act and Chapter 8, in your answers to show up-to-date knowledge.
    • 💡Use specific examples from practical tasks, like laying a kerb or repairing a pothole, to demonstrate understanding of procedures and safety measures.
    • 💡In written assessments, clearly explain the 'why' behind each step, not just the 'how', to show deeper comprehension of principles like compaction or drainage.

    Common Mistakes

    Common errors to avoid in your coursework

    • Failing to obtain or verify service drawings and permits before commencing work, leading to potential strikes on live utilities.
    • Neglecting to check the stability of excavation sides and omitting to install timber supports immediately after reaching the required depth in unstable ground.
    • Confusing the roles of the signal generator and receiver when using a cable avoidance tool, resulting in inaccurate service detection.
    • Misconception: Asphalt can be laid in any weather. Correction: Asphalt should only be laid in dry conditions and at temperatures above 5°C to ensure proper compaction and adhesion.
    • Misconception: Traffic management is just about placing cones. Correction: It requires a detailed plan, risk assessment, and compliance with legal standards to protect workers and road users.
    • Misconception: Drainage is not critical for road maintenance. Correction: Poor drainage leads to water damage, potholes, and reduced road lifespan, making it a key aspect of highways maintenance.

    Frequently Asked Questions

    Common questions students ask about this topic

    Before You Start

    Prior knowledge that will help with this topic

    • •Basic understanding of construction health and safety, such as from a Level 1 Award in Health and Safety in a Construction Environment.
    • •Numeracy skills for measuring and calculating material quantities and gradients.
    • •Familiarity with hand tools and basic construction techniques from introductory courses or work experience.

    Key Terminology

    Essential terms to know

    • Understand the preparation required for excavating operations in and around highways, Be able to carry out excavating operations in and around highways safely, Understand earth support systems for holes and trenches up to maximum depth of dig 2.0m, Be able to erect and dismantle timber earth support systems for holes and trenches safely

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