A shovel is a tool used for digging, lifting, and moving bulk materials, such as soil, coal, gravel, snow, sand, or ore. [1] Most shovels are hand tools consisting of a broad blade fixed to a medium-length handle. Shovel blades are usually made of sheet steel or hard plastics and are very strong. Shovel handles are usually made of wood (especially specific varieties such as ash or maple) or glass-reinforced plastic (fiberglass).
Hand shovel blades made of sheet steel usually have a folded seam or hem at the back to make a socket for the handle. This fold also commonly provides extra rigidity to the blade. The handles are usually riveted in place. A T-piece is commonly fitted to the end of the handle to aid grip and control where the shovel is designed for moving soil and heavy materials. These designs can all be easily mass-produced.
The term shovel also applies to larger excavating machines called power shovels, which serve the same purpose—digging, lifting, and moving material. Although such modern power shovels as front-end loaders and excavators (including tractors that feature a loading bucket on one end and a backhoe for digging and placing material on the other) descend from steam shovels and perform similar work, they are not classified as shovels.[ citation needed ]
Hand shovels have been adapted for many different tasks and environments. They can be optimized for a single task or designed as cross-over or compromise multitaskers. They are commonly used in agriculture.
It is also utilized in archaeology to locate and excavate all subsurface dirt.[ citation needed ]
In the Neolithic age and earlier, a large animal's scapula (shoulder blade) was often used as a crude shovel or spade. Shovels at this time were often used for farming. [2]
The later invention of purpose-built shovels was a ground-breaking development. Manual shoveling, often in combination with picking, was the chief means of excavation in construction until mechanization via steam shovels and later hydraulic equipment (excavators such as backhoes and loaders) gradually replaced most manual shoveling. The same is also true of the history of mining and quarrying and of bulk materials handling in industries such as steelmaking and stevedoring. Railroad cars and cargo holds containing ore, coal, gravel, sand, or grains were often loaded and unloaded this way. These industries did not always rely exclusively on such work, but such work was a ubiquitous part of them. Until the 1950s, manual shoveling employed large numbers of workers. Groups of workers called 'labor gangs' were assigned to whatever digging or bulk materials handling was needed in any given week, and dozens or hundreds of workers with hand shovels would do the kind of rapid excavating or materials handling that today is usually accomplished with powered excavators and loaders operated by a few skilled operators. Thus the cost of labor, even when each individual worker was poorly paid, was a tremendous expense of operations. Productivity of the business was tied mostly to labor productivity. It still often is even today; but in the past it was even more so. In industrial and commercial materials handling, hand shoveling was later replaced with loaders and backhoes.
Given the central importance and cost of manual labour in industry in the late 19th and early 20th centuries, the "science of shoveling" was something of great interest to developers of scientific management such as Frederick Winslow Taylor. [3] Taylor, with his focus on time and motion study, took an interest in differentiating the many motions of manual labor to a far greater degree than others tended to. Managers might not care to analyze it (possibly motivated by the assumption that manual labor is intellectually simple work), and workers might not care to analyze it in any way that encouraged management to take away the prerogative in craft work for the craftsman to decide the details of his methods. Taylor realized that failing to analyze shoveling practice represented a missed opportunity to discover or synthesize best practices for shoveling, which could achieve highest productivity (value for dollar spent). It was Taylor and colleagues in the 1890s through 1910s that greatly expanded the existing idea of varied shovel designs with different-sized scoops, one for each material, based on the material's density. Under scientific management, it was no longer acceptable to use the same shovel for shoveling brown coal one day and gravel the next. Taylor said the increased worker productivity, and corresponding savings in wages paid, would offset the capital cost of maintaining two shovels.
During the Second Industrial Revolution around 1900, heavy equipment such as crawler excavators became available. [4]
Shovels known as entrenching tools were made by the British in 1908. [5] They were used by the Germans in World War I and World War II. [6]
Image | Name (and synonyms if any) | Description |
---|---|---|
coal shovel | Typically has a wide, flat blade with steeply turned sides, a flat face and a short D-shaped handle. Over the years, various sizes for different kinds or grades of coal have sometimes been used. | |
snow shovel | Often has a very wide sideless blade that curves upward attached to a short handle with a D-shaped grip. A variety of styles are available. Some are designed mostly for pushing the snow, others for lifting it. The blade can be metal or plastic. | |
snow sled shovel snow scoop sleigh shovel | large and deep hopper-like implement fitted with a wide loop handle and designed to scoop up a load of snow and slide it away without lifting. | |
grain shovel barn shovel | Has a large, wide aluminium or plastic blade attached to a short hardwood handle with D-shaped grip. Made to move large quantities of loose light material. Early models were made entirely from wood, typically a single piece. | |
spoon shovel | A long handle with a small, oval, cupped, inclined blade at the end, used in excavating deep, narrow holes or removing material from a lower elevation, as from a tank. Its name comes from its resemblance to a spoon. | |
roofing shovel | A specialized prying tool that evolved from use of spading forks and pitchforks to remove old roof shingles and underlayment as part of roof repair. | |
square shovel | A general category of shovel that includes many types with a generally square outline (rather than being pointed like many spades are). | |
scoop | A general category of shovel that includes many types with a generally dished or cupped shape, and typically a fairly square edge, tailored to scooping up loose materials. | |
drain spade sharpshooter trenching shovel trenching spade | Generally a long thin blade with pronounced upturned side flanges. Used for digging trenches. |
A skid loader, skid-steer loader (SSL), or skidsteer is any of a class of compact heavy equipment with lift arms that can attach to a wide variety of buckets and other labor-saving tools or attachments.
A trench is a type of excavation or depression in the ground that is generally deeper than it is wide, and narrow compared with its length.
Frederick Winslow Taylor was an American mechanical engineer. He was widely known for his methods to improve industrial efficiency. He was one of the first management consultants. In 1909, Taylor summed up his efficiency techniques in his book The Principles of Scientific Management which, in 2001, Fellows of the Academy of Management voted the most influential management book of the twentieth century. His pioneering work in applying engineering principles to the work done on the factory floor was instrumental in the creation and development of the branch of engineering that is now known as industrial engineering. Taylor made his name, and was most proud of his work, in scientific management; however, he made his fortune patenting steel-process improvements. As a result, scientific management is sometimes referred to as Taylorism.
Excavators are heavy construction equipment primarily consisting of a boom, dipper, bucket, and cab on a rotating platform known as the "house" - although the largest form ever, the dragline excavator, eliminated the dipper in favor of a line and winch.
A spade is a tool primarily for digging consisting of a long handle and blade, typically with the blade narrower and flatter than the common shovel. Early spades were made of riven wood or of animal bones. After the art of metalworking was developed, spades were made with sharper tips of metal. Before the introduction of metal spades manual labor was less efficient at moving earth, with picks being required to break up the soil in addition to a spade for moving the dirt. With a metal tip, a spade can both break and move the earth in most situations, increasing efficiency. A classic spade, with a narrow body and flat tip is suited for digging post holes, and is not to be confused with a "roundpoint" shovel, which has a wider body and tapered tip.
Scientific management is a theory of management that analyzes and synthesizes workflows. Its main objective is improving economic efficiency, especially labor productivity. It was one of the earliest attempts to apply science to the engineering of processes to management. Scientific management is sometimes known as Taylorism after its pioneer, Frederick Winslow Taylor.
A hoe is an ancient and versatile agricultural and horticultural hand tool used to shape soil, remove weeds, clear soil, and harvest root crops. Shaping the soil includes piling soil around the base of plants (hilling), digging narrow furrows (drills) and shallow trenches for planting seeds or bulbs. Weeding with a hoe includes agitating the surface of the soil or cutting foliage from roots, and clearing the soil of old roots and crop residues. Hoes for digging and moving soil are used to harvest root crops such as potatoes.
A loader is a heavy equipment machine used in construction to move or load materials such as soil, rock, sand, demolition debris, etc. into or onto another type of machinery.
A backhoe is a type of excavating equipment, or excavator, consisting of a digging bucket on the end of a two-part articulated arm. It is typically mounted on the back of a tractor or front loader, the latter forming a "backhoe loader". The section of the arm closest to the vehicle is known as the boom, while the section that carries the bucket is known as the dipper, both terms derived from steam shovels. The boom, which is the long piece of the backhoe arm attached to the tractor through a pivot called the king-post, is located closest to the cab. It allows the arm to pivot left and right, typically through a range of 180 to 200 degrees, and also enables lifting and lowering movements.
A backhoe loader, also called a loader backhoe, loader excavator, tractor excavator, digger or colloquially shortened to backhoe within the industry, is a heavy equipment vehicle that consists of a tractor-like unit fitted with a loader-style shovel/bucket on the front and a backhoe on the back. Due to its (relatively) small size and versatility, backhoe loaders are very common in urban engineering and small construction projects as well as developing countries. This type of machine is similar to and derived from what is now known as a TLB (Tractor-Loader-Backhoe), which is to say, an agricultural tractor fitted with a front loader and rear backhoe attachment.
Heavy equipment, heavy machinery, earthmovers, construction vehicles, or construction equipment, refers to heavy-duty vehicles specially designed to execute construction tasks, most frequently involving earthwork operations or other large construction tasks. Heavy equipment usually comprises five equipment systems: the implement, traction, structure, power train, and control/information.
A steam shovel is a large steam-powered excavating machine designed for lifting and moving material such as rock and soil. It is the earliest type of power shovel or excavator. Steam shovels played a major role in public works in the 19th and early 20th century, being key to the construction of railroads and the Panama Canal. The development of simpler, cheaper diesel, gasoline and electric shovels caused steam shovels to fall out of favor in the 1930s.
An entrenching tool (UK), intrenching tool (US), E-tool, or trenching tool is a digging tool used by military forces for a variety of military purposes. Survivalists, campers, hikers, and other outdoors groups have found it to be indispensable in field use. Modern entrenching tools are usually collapsible and made using steel, aluminum, or other light metals.
A heavy equipment operator operates heavy equipment used in engineering and construction projects. Typically only skilled workers may operate heavy equipment, and there is specialized training for learning to use heavy equipment.
A power shovel, also known as a motor shovel, stripping shovel, front shovel, mining shovel or rope shovel, is a bucket-equipped machine usually powered by steam, diesel fuel, gasoline or electricity and used for digging and loading earth or fragmented rock and for mineral extraction. Power shovels are a type of rope/cable excavator, where the digging arm is controlled and powered by winches and steel ropes, rather than hydraulics like in the modern hydraulic excavators. Basic parts of a power shovel include the track system, cabin, cables, rack, stick, boom foot-pin, saddle block, boom, boom point sheaves and bucket. The size of bucket varies from 0.73 to 53 cubic meters.
Material handling involves short-distance movement within the confines of a building or between a building and a transportation vehicle. It uses a wide range of manual, semi-automated, and automated equipment and includes consideration of the protection, storage, and control of materials throughout their manufacturing, warehousing, distribution, consumption, and disposal. Material handling can be used to create time and place utility through the handling, storage, and control of waste, as distinct from manufacturing, which creates form utility by changing the shape, form, and makeup of material.
A bucket is a specialized container attached to a machine, as compared to a bucket adapted for manual use by a human being. It is a bulk material handling component.
Quick couplers are used with construction machines to allow the rapid change of working tools or buckets and attachments on the machine. They remove the need to use hammers to manually drive out and insert the mounting pins for attachments. They also bring with them additional safety risks that must be overcome by careful design and manufacture, and proper use.
The productivity-improving technologies are the technological innovations that have historically increased productivity.
Digging, also referred to as excavation, is the process of using some implement such as claws, hands, manual tools or heavy equipment, to remove material from a solid surface, usually soil, sand or rock on the surface of Earth. Digging is actually the combination of two processes, the first being the breaking or cutting of the surface, and the second being the removal and relocation of the material found there. In a simple digging situation, this may be accomplished in a single motion, with the digging implement being used to break the surface and immediately fling the material away from the hole or other structure being dug.