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Construction Engineering & Management - Vol 2
Explore and master the fundamentals of Construction Engineering & Management - Vol 2
You've not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.Chapter 1
Effect of Altitude on Engine Performance
The chapter discusses the effects of altitude on the performance of internal combustion engines, the importance of performance charts for analyzing machine capabilities, and various factors affecting usable power, including underfoot conditions. It emphasizes the need for maintaining the correct fuel-to-air ratio and discusses different payload measurement methods as well as how various gear mechanisms affect operational efficiency.
Chapter 2
Construction Methods and Equipment Management
The chapter focuses on bulldozers as versatile earthmoving machines, detailing their applications, types of blades, and techniques for enhancing productivity. It highlights the significance of economic haul distance, types of bulldozer movements, and the impact of blade performance on operations. Additionally, the text elucidates the differences between wheel-mounted and crawler-mounted bulldozers, emphasizing their respective advantages and disadvantages.
Chapter 3
Blade Overview
This chapter discusses the various types of blades used in bulldozers, highlighting their characteristics, functions, and applications. Key performance metrics such as cutting ratio and load ratio are examined, alongside their implications for operational efficacy in different soil conditions. Additionally, the chapter outlines methods to enhance bulldozer productivity by reducing end spillage and describes factors impacting efficiency.
Chapter 4
Production Value of the Bulldozer
The chapter discusses the productivity estimation of bulldozers in various earthmoving operations. It outlines key factors that influence productivity, such as correction factors for material type, operator skill, and job efficiency. Additionally, the chapter emphasizes the importance of accurate cost estimation per bank meter cube for effective project bidding.
Chapter 5
Cycle Time of the Bulldozer
The chapter provides a comprehensive insight into the operational dynamics of bulldozers, particularly focusing on cycle time estimation, productivity assessment, and the impact of various operational factors such as haul distance, speed, and transmission types. It elaborates on how to use performance charts for speed determination and introduces several methods for estimating productivity, including the use of production curves and thumb rules. This foundation offers a vital understanding necessary for effective cost estimation in earthmoving operations.
Chapter 6
Earth Moving Equipment-Scrapers (Part-1)
The chapter discusses the functionalities and classifications of scrapers, particularly emphasizing their role in earthmoving tasks. Key topics include operational mechanics, types of scrapers, and considerations for selecting appropriate machinery based on project requirements. The versatility of scrapers is highlighted through their capability for loading, hauling, and dumping across varying distances and materials.
Chapter 7
Cycle Time of a Scraper
Cycle time is a crucial aspect of scraper operations, encompassing fixed and variable time components. Fixed time components include loading, dumping, turning, and acceleration, while variable time is primarily influenced by haul and return distances. Proper loading practices and haul route maintenance significantly impact efficiency, with the aim of optimizing productivity and reducing costs.
Chapter 8
Back-Track Loading Method
The chapter discusses various loading methods used in construction, emphasizing back-track loading, chain loading, and shuttle loading, with a focus on their operational efficiencies and cycle times. It highlights the interdependence between scrapers and pushers, detailing the importance of balancing their numbers to minimize waiting times and maximize productivity. Key formulas for calculating cycle times and optimal loading practices for scrapers are also introduced.
Chapter 9
Earth Moving Equipment-Scrapers (Part-2)
The lecture discusses the operational aspects of scrapers in civil engineering, focusing on productivity estimation and balancing the number of scrapers and pushers. It explains key concepts such as swell factor, machine weight, and resistance encountered during operations. The necessity of optimizing operations to improve productivity and reduce production costs is emphasized.
Chapter 10
Introduction to Scraper Economics
The chapter focuses on the economics of scraper operations, emphasizing how the number of scrapers affects productivity. It delves into calculating productivity based on both scrapers and pushers, illustrating the balance needed to maximize efficiency while minimizing costs. The findings highlight the importance of choosing the right combination of equipment to meet project deadlines effectively while controlling production expenses.
Chapter 11
Construction Methods and Equipment Management
This chapter provides a comprehensive overview of front end loaders, discussing their types, applications, and various attachments. It highlights the advantages of front end loaders over other excavating equipment, such as their ability to lift and load materials effectively. Additionally, the chapter explores the importance of bucket rating and discusses the production cycle associated with loaders.
Chapter 12
Bucket Ratings and Capacity
The chapter discusses the significance of bucket ratings and fill factors in estimating loader productivity. It emphasizes the variability of filling ability depending on material types and loader configurations. Additionally, it covers stability and tipping load considerations for front-end loaders and concludes with methods to estimate production cycles and operations efficiently.
Chapter 13
Construction Methods and Equipment Management
The lecture covers fixed position excavating equipment, primarily focusing on the front shovel and backhoe, outlining their applications, productivity estimation, and selection criteria. It highlights the mechanics, operational paths, and factors influencing the choice of excavation tools based on project needs, such as digging height and material type. Additionally, the importance of calculating costs per cubic meter of excavation is emphasized to ensure effective machinery selection and project management.
Chapter 14
Productivity of Shovel
This chapter explores the principles of productivity estimation for excavators like shovels and backhoes, focusing on factors like the angle of swing and the height of cut. Correction factors are crucial for adjusting productivity evaluations based on actual working conditions compared to ideal situations, which impacts cycle time and machine efficiency. Practical examples and estimations of shovel and backhoe operations are provided to illustrate these concepts.
Chapter 15
Construction Methods and Equipment Management
The chapter discusses earth moving equipment with a focus on trucks, examining their types, production cycles, and productivity estimates. It highlights the importance of matching the capacities of trucks and loaders for optimal efficiency and cost-effectiveness. Additionally, the text compares different dumping mechanisms and conditions for the various types of trucks used in construction and hauling operations.
Chapter 16
Loading Time and Gravimetric Capacity
The chapter focuses on the importance of understanding machine operating loads, gravimetric capacity, and the relationship between trucks and excavators in earthmoving operations. It emphasizes that exceeding the safe operating weight can lead to significant wear and tear on machinery, affecting production efficiency and costs. Furthermore, it discusses the balancing of interdependent machinery, highlighting how proper load management and scheduling can optimize operations.
Chapter 17
Balance Number of Trucks for One Loader
The chapter discusses the balance number of trucks needed per loader, emphasizing the importance of finding an efficient balance to minimize production costs. It explains how productivity varies with different numbers of trucks compared to a loader and describes the economic implications of these choices. Additionally, it highlights the significance of using the loader's productivity to control the overall output when the number of trucks exceeds the balance point.
Chapter 18
Construction Methods and Equipment Management
The chapter provides an in-depth discussion on piles and pile driving equipment, exploring various types of piles classified by application, material, and installation methods. Key topics include the principles of pile driving, factors influencing the selection of pile hammers, and methods to control driving stress. Additionally, it emphasizes the importance of selecting appropriate foundation types based on soil conditions and structural loads.
Chapter 19
Precast Piles: Length and Testing
The chapter provides an in-depth exploration of various types of piling methods such as precast concrete piles, cast in situ piles, steel piles, and composite piles. It emphasizes the necessity of prior investigation and testing to ascertain the required pile lengths and load-bearing capacities along with discussing the advantages and disadvantages of each piling type. Key considerations in selecting the appropriate pile type are highlighted along with insights on associated equipment and techniques for pile driving operations.
Chapter 20
Driving Stresses in Piles
The chapter discusses the importance of controlling driving stress in precast piles to prevent damage during installation. Key methods include using cushioning materials and selecting appropriate hammer weights and heights for optimal blow efficiency. Additionally, guidelines for determining safe loads on piles and selecting appropriate pile hammers based on various factors such as pile type, soil conditions, and project requirements are explored.
Chapter 21
Piles and Pile Driving Equipment (Part 2)
The chapter delves into various types of pile driving equipment, emphasizing the mechanics and selection criteria for each type of hammer based on soil conditions and pile specifications. It discusses drop hammers, single acting and double acting steam hammers, highlighting their operational principles, advantages, and relevant safety considerations during pile installation.